/* ===================================================================
   ENHANCED PORTFOLIO CSS - COMPLETE DARK/LIGHT MODE SYSTEM
   Modern, Responsive, Performance-Optimized
   =================================================================== */

/* CSS Custom Properties - Enhanced Theme System */
:root {
    --header-height: 68px;

    /* Primary Theme Colors - Default (Emerald/Green) */
    --color-primary: #20986c;
    --color-primary-dark: #1a7a56;
    --color-primary-light: #2db87c;
    --color-primary-rgb: 32, 152, 108;
    --color-primary-dark-rgb: 26, 122, 86;
    
    /* Secondary Colors */
    --color-secondary: #007bff;
    --color-secondary-dark: #0056b3;
    --color-accent: #ff7a21;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --color-info: #17a2b8;

    /* Light Theme Surface Colors */
    --color-background: #ffffff;
    --color-surface: #f8f9fa;
    --color-surface-light: #ffffff;
    --color-surface-dark: #e9ecef;
    --color-text: #212529;
    --color-text-muted: #6c757d;
    --color-text-light: #868e96;
    --color-border: #dee2e6;
    --color-border-light: #e9ecef;
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    /* Spacing System */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 5rem;
    --space-5xl: 6rem;

    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1rem;
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 0.1s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
    --transition-all: all var(--transition-base);

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
    --z-toast: 1070;
}

/* Dark Theme Colors */
[data-theme="dark"] {
    --color-background: #0a0a0a;
    --color-surface: #1a1a1a;
    --color-surface-light: #2a2a2a;
    --color-surface-dark: #111111;
    --color-text: #ffffff;
    --color-text-muted: #b0b0b0;
    --color-text-light: #888888;
    --color-border: #333333;
    --color-border-light: #404040;
    --color-shadow: rgba(0, 0, 0, 0.3);
}

/* System Theme Preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-background: #0a0a0a;
        --color-surface: #1a1a1a;
        --color-surface-light: #2a2a2a;
        --color-surface-dark: #111111;
        --color-text: #ffffff;
        --color-text-muted: #b0b0b0;
        --color-text-light: #888888;
        --color-border: #333333;
        --color-border-light: #404040;
        --color-shadow: rgba(0, 0, 0, 0.3);
    }
}

/* Reduced Motion Preference */
@media (prefers-reduced-motion: reduce) {
    :root {
        --transition-fast: 0.01ms;
        --transition-base: 0.01ms;
        --transition-slow: 0.01ms;
    }

    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Reset and Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base);
    margin: 0;
    padding: 0;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: var(--z-tooltip);
    transition: top var(--transition-base);
}

.skip-link:focus {
    top: 6px;
}

/* Loading Screen */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-background);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: var(--z-toast);
    transition: opacity var(--transition-base);
    /* Emergency Fail-safe: Auto-hide after 7 seconds even if JS fails */
    animation: autoHideLoader 0.5s ease-in 7s forwards;
}

@keyframes autoHideLoader {
    to {
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
    }
}

.loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-border);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-md);
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.loading-text {
    color: var(--color-primary);
    font-weight: 500;
    font-size: var(--font-size-lg);
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Enhanced Professional Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: var(--header-height);
    z-index: var(--z-fixed);
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.85), rgba(26, 26, 26, 0.8));
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Header on scroll - more opaque */
.header.scrolled {
    background: linear-gradient(180deg, rgba(10, 10, 10, 0.95), rgba(26, 26, 26, 0.9));
    border-bottom: 1px solid var(--color-border);
}

[data-theme="light"] .header.scrolled {
    background: rgba(248, 249, 250, 0.95);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .header {
    background: rgba(248, 249, 250, 0.85);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.header .container {
    display: flex;
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--container-padding);
    gap: var(--space-md);
    height: 100%;
    min-height: 68px;
    overflow: visible;
}

/* Logo Section */
.logo-section {
    flex: 0 0 auto;
    min-width: 240px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    transition: var(--transition-all);
    padding: 0;
    border-radius: var(--border-radius);
}

.logo:hover {
    transform: translateY(-1px);
}

.logo-image {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    border: 1.5px solid var(--color-primary);
    transition: var(--transition-all);
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.logo-image img {
    display: block;
    transition: transform var(--transition-base);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.logo:hover .logo-image img {
    transform: scale(1.05);
}

.logo-content {
    display: flex;
    flex-direction: column;
    gap: 1px;
    min-width: 0;
}

.logo-text {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
    letter-spacing: -0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.logo-subtitle {
    font-size: 11px;
    color: var(--color-primary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    opacity: 0.75;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Professional Navigation */
.main-nav {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--border-radius);
    transition: var(--transition-all);
}

.nav-toggle:hover {
    background: var(--color-surface-light);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: var(--transition-all);
}

.nav-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 4px;
    margin: 0;
    padding: 0;
    align-items: center;
    flex-wrap: nowrap;
    justify-content: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0;
    color: var(--color-text);
    opacity: 0.78;
    text-decoration: none;
    font-weight: 500;
    font-size: 13px;
    padding: 6px 11px;
    border-radius: 6px;
    position: relative;
    transition: var(--transition-all);
    border: 1px solid transparent;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--color-text);
    opacity: 1;
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.08);
    transform: translateY(-1px);
}

.nav-link.active {
    color: var(--color-primary);
    opacity: 1;
    background: rgba(32, 152, 108, 0.12);
    border-color: rgba(32, 152, 108, 0.3);
}

.nav-icon {
    display: none;
}

.nav-link:hover .nav-icon {
    opacity: 1;
    transform: scale(1.08);
}

.nav-text {
    font-weight: 600;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    width: 0;
    height: 1.5px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: var(--transition-all);
    transform: translateX(-50%);
}

.nav-link.active::after {
    width: 70%;
}

.nav-backdrop {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 1035;
        cursor: default;
        transition: background-color 0.28s ease, opacity 0.28s ease, visibility 0.28s ease;
    }

    .nav-backdrop.active {
        background: rgba(0, 0, 0, 0.4);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        cursor: pointer;
    }

/* Professional Header Actions */
.header-actions {
    display: flex !important;
    align-items: center;
    gap: 16px;
    flex: 0 0 auto;
    margin-left: 2rem;
    padding-right: 1.5rem;
    justify-content: flex-end;
    opacity: 1 !important;
    visibility: visible !important;
}

/* Status Indicator - REMOVED FROM NAVBAR */
/*
.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: rgba(32, 152, 108, 0.1);
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-primary);
    transition: var(--transition-all);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
}

.status-indicator:hover {
    background: rgba(32, 152, 108, 0.15);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
    box-shadow: 0 0 0 2px rgba(32, 152, 108, 0.2);
}

.status-text {
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.05em;
    white-space: nowrap;
}
*/

/* CTA Button */
.cta-button {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius);
    transition: var(--transition-all);
    box-shadow: var(--shadow-sm);
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
}

/* Theme Toggle styles moved to toggle.css for consolidation and V12 consistency */

/* Professional Social Links */
.social-links {
    display: flex;
    gap: var(--space-xs);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius);
    transition: var(--transition-all);
    opacity: 0.7;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.social-link:hover {
    opacity: 1;
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-sm);
}

.social-link img {
    filter: grayscale(0.3);
    transition: var(--transition-all);
}

.social-link:hover img {
    filter: grayscale(0) brightness(1.2);
}

/* Professional Mobile Navigation */
@media (max-width: 1400px) {
    .header .container {
        gap: 10px;
    }

    .main-nav {
        justify-content: center;
        padding: 0;
    }

    .nav-menu {
        gap: 2px;
    }

    .nav-link {
        padding: 6px 9px;
        font-size: 12px;
    }

    .nav-text {
        font-size: 12px;
    }
}

@media (max-width: 1200px) {
    .main-nav {
        justify-content: center;
        padding: 0;
    }

    .nav-menu {
        gap: 2px;
    }

    .nav-link {
        padding: 6px 8px;
        font-size: 12px;
    }

    .nav-text {
        font-size: 11px;
    }

    /* Status indicator removed */
}

@media (max-width: 1024px) {
    .main-nav {
        justify-content: center;
        padding: 0;
    }

    .nav-menu {
        gap: 1px;
    }

    .nav-link {
        padding: 5px 6px;
        font-size: 11px;
    }

    .nav-text {
        display: none;
    }

    .nav-icon {
        font-size: 13px;
    }

    /* Status indicator removed */
}

@media (max-width: 900px) {
    .header .container {
        justify-content: flex-start;
        gap: 0.75rem;
    }

    .logo-section {
        min-width: auto;
        margin-right: auto;
    }

    /* ── Hamburger Toggle ── */
    .nav-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        padding: 0;
        border-radius: 12px;
        background: rgba(var(--color-primary-rgb), 0.08);
        border: 1.5px solid rgba(var(--color-primary-rgb), 0.22);
        transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }

    .nav-toggle:hover,
    .nav-toggle:focus-visible {
        background: rgba(var(--color-primary-rgb), 0.15);
        border-color: rgba(var(--color-primary-rgb), 0.4);
    }

    .nav-toggle.active {
        background: rgba(var(--color-primary-rgb), 0.14);
        border-color: var(--color-primary);
    }

    .main-nav {
        flex: 0 0 auto;
        justify-content: flex-end;
        order: 3;
    }

    .header-actions {
        min-width: auto;
        flex: 0 0 auto;
        gap: var(--space-xs);
        margin-left: 0;
        padding-right: 0;
        order: 2;
    }

    /* ── Right-Side Drawer ── */
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        right: 0;
        bottom: 0;
        width: min(300px, 82vw);
        height: calc(100dvh - var(--header-height));
        margin: 0;
        padding: 0;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;
        background: rgba(12, 16, 28, 0.97);
        border-left: 1px solid rgba(255, 255, 255, 0.06);
        box-shadow: -20px 0 60px rgba(0, 0, 0, 0.45), -4px 0 16px rgba(0, 0, 0, 0.2);
        -webkit-backdrop-filter: blur(28px) saturate(1.4);
        backdrop-filter: blur(28px) saturate(1.4);
        transform: translateX(105%);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: transform 0.38s cubic-bezier(0.32, 0.72, 0, 1),
                    opacity 0.28s ease,
                    visibility 0.28s ease;
        z-index: 1040;
        overflow-y: auto;
        overflow-x: hidden;
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
    }

    [data-theme="light"] .nav-menu {
        background: rgba(255, 255, 255, 0.98);
        border-left-color: rgba(0, 0, 0, 0.06);
        box-shadow: -20px 0 60px rgba(0, 0, 0, 0.12), -4px 0 16px rgba(0, 0, 0, 0.06);
    }

    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    /* ── Drawer header spacer (matches the fixed header height) ── */
    .nav-menu::before {
        content: '';
        display: none;
        flex-shrink: 0;
        height: var(--header-height);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        background: rgba(var(--color-primary-rgb), 0.04);
    }

    [data-theme="light"] .nav-menu::before {
        border-bottom-color: rgba(0, 0, 0, 0.06);
        background: rgba(var(--color-primary-rgb), 0.03);
    }

    /* ── Nav links container spacing ── */
    .nav-menu li {
        width: 100%;
        padding: 0 0.75rem;
        opacity: 0;
        transform: translateX(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
        pointer-events: auto;
    }

    .nav-menu li:first-child {
        padding-top: 0.75rem;
    }

    .nav-menu li:last-child {
        padding-bottom: max(1.5rem, calc(env(safe-area-inset-bottom) + 1rem));
    }

    /* ── Staggered entry animation ── */
    .nav-menu.active li {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-menu.active li:nth-child(1) { transition-delay: 0.06s; }
    .nav-menu.active li:nth-child(2) { transition-delay: 0.10s; }
    .nav-menu.active li:nth-child(3) { transition-delay: 0.14s; }
    .nav-menu.active li:nth-child(4) { transition-delay: 0.18s; }
    .nav-menu.active li:nth-child(5) { transition-delay: 0.22s; }
    .nav-menu.active li:nth-child(6) { transition-delay: 0.26s; }

    /* ── Individual nav link styling ── */
    .nav-link {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        width: 100%;
        min-height: 54px;
        padding: 0.85rem 1rem;
        text-align: left;
        justify-content: flex-start;
        font-size: 15px;
        font-weight: 500;
        color: rgba(255, 255, 255, 0.85);
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid rgba(255, 255, 255, 0.05);
        border-radius: 14px;
        margin-bottom: 0.35rem;
        position: relative;
        overflow: hidden;
        transition: background 0.22s ease,
                    border-color 0.22s ease,
                    color 0.22s ease,
                    transform 0.18s ease;
        opacity: 1;
        box-shadow: none;
        cursor: pointer;
        pointer-events: auto;
    }

    [data-theme="light"] .nav-link {
        color: var(--color-text);
        background: rgba(0, 0, 0, 0.02);
        border-color: rgba(0, 0, 0, 0.06);
    }

    .nav-link:hover,
    .nav-link:focus-visible {
        transform: translateX(4px);
        background: rgba(var(--color-primary-rgb), 0.1);
        border-color: rgba(var(--color-primary-rgb), 0.25);
        color: #fff;
    }

    [data-theme="light"] .nav-link:hover,
    [data-theme="light"] .nav-link:focus-visible {
        color: var(--color-primary-dark);
        background: rgba(var(--color-primary-rgb), 0.08);
    }

    /* ── Active nav link — primary accent ── */
    .nav-link.active {
        background: rgba(var(--color-primary-rgb), 0.12);
        border-color: rgba(var(--color-primary-rgb), 0.35);
        color: var(--color-primary-light);
        font-weight: 600;
    }

    .nav-link.active::before {
        content: '';
        position: absolute;
        left: 0;
        top: 8px;
        bottom: 8px;
        width: 3px;
        border-radius: 0 3px 3px 0;
        background: var(--color-primary);
    }

    [data-theme="light"] .nav-link.active {
        color: var(--color-primary-dark);
        background: rgba(var(--color-primary-rgb), 0.1);
        border-color: rgba(var(--color-primary-rgb), 0.3);
    }

    .nav-link::after {
        display: none;
    }

    /* ── Show nav icons in drawer ── */
    .nav-icon {
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        width: 32px;
        height: 32px;
        flex-shrink: 0;
        border-radius: 8px;
        background: rgba(255, 255, 255, 0.04);
        transition: background 0.2s ease, transform 0.2s ease;
    }

    [data-theme="light"] .nav-icon {
        background: rgba(var(--color-primary-rgb), 0.06);
    }

    .nav-link:hover .nav-icon,
    .nav-link:focus-visible .nav-icon {
        background: rgba(var(--color-primary-rgb), 0.15);
        transform: scale(1.08);
    }

    .nav-text {
        display: block;
        font-size: 15px;
        letter-spacing: 0.01em;
    }

    /* ── Drawer close animation (links disappear faster) ── */
    .nav-menu:not(.active) li {
        transition-delay: 0s !important;
        transition-duration: 0.15s;
    }
}

/* ── Enhanced Backdrop for Drawer ── */
/* Removed duplicate, merged into primary definition at line ~493 */

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .header {
        height: var(--header-height);
    }

    .header .container {
        padding: 0 var(--container-padding);
        gap: 8px;
    }

    .logo-section {
        min-width: auto;
        flex: 0 0 auto;
    }

    .logo-content {
        display: none;
    }

    .logo-image {
        border-width: 1px;
        width: 36px;
        height: 36px;
    }

    .logo-image img {
        width: 100%;
        height: 100%;
    }

    /* Status indicator removed */

    .cta-button {
        padding: var(--space-xs) var(--space-sm);
        font-size: var(--font-size-xs);
    }

    .cta-button span {
        display: none;
    }

    .social-links {
        gap: var(--space-xs);
    }

    .social-link {
        width: 32px;
        height: 32px;
    }

    .nav-menu {
        width: min(280px, 85vw);
    }

    .nav-toggle {
        width: 40px;
        height: 40px;
        border-radius: 10px;
    }

    .nav-link {
        min-height: 50px;
        padding: 0.75rem 0.9rem;
        font-size: 14px;
        border-radius: 12px;
    }

    .nav-icon {
        width: 28px;
        height: 28px;
        font-size: 16px;
    }

    .nav-text {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .header .container {
        padding: 0 var(--space-md);
    }

    .header-actions {
        gap: var(--space-xs);
        display: flex !important;
    }

    .theme-toggle {
        display: flex !important;
        opacity: 1 !important;
        visibility: visible !important;
    }

    .social-links {
        display: none;
    }

    .logo-section {
        min-width: 100px;
    }

    /* Status indicator removed */

    .cta-button {
        padding: var(--space-xs);
        border-radius: var(--border-radius-full);
    }
}

/* Enhanced Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-4xl) 0;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 100%);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.25;
    filter: blur(0.5px);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg,
            var(--color-background) 0%,
            rgba(10, 10, 10, 0.95) 30%,
            rgba(32, 152, 108, 0.1) 70%,
            var(--color-background) 100%);
    z-index: -1;
}

[data-theme="light"] .hero-overlay {
    background: linear-gradient(135deg,
            var(--color-background) 0%,
            rgba(248, 249, 250, 0.95) 30%,
            rgba(32, 152, 108, 0.05) 70%,
            var(--color-background) 100%);
}

.hero-content {
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
    z-index: 1;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: linear-gradient(135deg, rgba(32, 152, 108, 0.15), rgba(0, 123, 255, 0.1));
    border: 2px solid rgba(32, 152, 108, 0.3);
    color: var(--color-primary);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-2xl);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(32, 152, 108, 0.2);
    transition: all var(--transition-base);
}

.hero-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(32, 152, 108, 0.3);
}

.badge-dot {
    width: 10px;
    height: 10px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
    box-shadow: 0 0 10px rgba(40, 167, 69, 0.5);
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

.hero-title {
    font-size: clamp(var(--font-size-4xl), 7vw, var(--font-size-6xl));
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-xl);
    letter-spacing: -0.02em;
}

.highlight {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: 2px;
    opacity: 0.6;
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
    font-weight: 400;
}

/* Enhanced Hero Stats */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    justify-items: center;
    align-items: center;
    gap: var(--space-xl);
    max-width: 840px;
    margin: 0 auto var(--space-3xl);
    padding: var(--space-2xl);
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.9), rgba(32, 152, 108, 0.1));
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(32, 152, 108, 0.2);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.hero-stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
}

[data-theme="light"] .hero-stats {
    background: linear-gradient(135deg, rgba(248, 249, 250, 0.9), rgba(32, 152, 108, 0.05));
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.stat-item {
    text-align: center;
    position: relative;
    padding: var(--space-md);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.stat-item:hover {
    background: rgba(32, 152, 108, 0.1);
    transform: translateY(-2px);
}

.stat-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-xs);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

/* Hero Actions */
.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

/* Enhanced Professional Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-2xl);
    border: 2px solid transparent;
    border-radius: var(--border-radius-xl);
    font-size: var(--font-size-lg);
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-height: 56px;
    justify-content: center;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.2),
            transparent);
    transition: left 0.6s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    box-shadow: 0 8px 25px rgba(32, 152, 108, 0.3);
    border: 2px solid var(--color-primary);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(32, 152, 108, 0.4);
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
    position: relative;
}

.btn-outline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.btn-outline:hover {
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline:hover::before {
    opacity: 1;
}

/* Enhanced Section Styles */
section {
    padding: var(--space-5xl) 0;
    position: relative;
    overflow: hidden;
    scroll-margin-top: 100px;
}

section:nth-child(even) {
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(32, 152, 108, 0.02) 100%);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
    position: relative;
}

.section-shell-3d {
    background: var(--color-bg-obsidian) !important;
    padding: 100px 0 !important;
}

.section-shell-3d .section-subtitle {
    color: rgba(255, 255, 255, 0.72) !important;
}

[data-theme="light"] .section-shell-3d {
    background: linear-gradient(180deg, #f8fbff 0%, #eef4fa 100%) !important;
}

[data-theme="light"] .section-shell-3d .section-subtitle {
    color: #475569 !important;
}

.section-title-center {
    text-align: center;
    margin-bottom: 50px;
}

.project-modal-icon {
    fill: white;
    margin-right: 8px;
    flex-shrink: 0;
}

.contact-copy-value {
    cursor: pointer;
    user-select: all;
}

.contact-copy-hint {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 0.8rem;
    opacity: 0.6;
}

section[id],
#publications,
#certification-list {
    scroll-margin-top: 96px;
}

.section-title {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 800;
    margin-bottom: var(--space-lg);
    position: relative;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
    border-radius: 3px;
    box-shadow: 0 2px 8px rgba(32, 152, 108, 0.3);
}

.section-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
    font-weight: 400;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-image {
    position: relative;
}

.profile-card {
    position: relative;
    text-align: center;
}

.profile-image {
    width: 100%;
    max-width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius-xl);
    border: 4px solid var(--color-primary);
    box-shadow: var(--shadow-2xl);
    transition: var(--transition-all);
}

.profile-image:hover {
    transform: scale(1.02) rotate(1deg);
}

.profile-status {
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-full);
    padding: var(--space-sm) var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: var(--shadow-lg);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.about-text {
    padding-left: var(--space-xl);
}

.about-name {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}


/* Simple, recruiter-friendly hero overrides */
.hero-section {
    background: radial-gradient(circle at 20% 20%, rgba(32, 152, 108, 0.05), transparent 35%),
        radial-gradient(circle at 80% 10%, rgba(0, 123, 255, 0.06), transparent 30%),
        var(--color-surface);
    padding: var(--space-4xl) 0;
}

.hero-bg-image {
    opacity: 0.08;
    filter: blur(3px) saturate(0.9);
}

.hero-overlay {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(255, 255, 255, 0.7));
    mix-blend-mode: lighten;
}

[data-theme="dark"] .hero-overlay {
    background: linear-gradient(135deg, rgba(10, 10, 10, 0.92), rgba(10, 10, 10, 0.75));
    mix-blend-mode: normal;
}

.hero-simple-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-3xl);
    align-items: center;
    padding: var(--space-2xl);
    border-radius: var(--border-radius-xl);
    background: var(--color-surface-light);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border-light);
}

[data-theme="dark"] .hero-simple-grid {
    background: rgba(26, 26, 26, 0.9);
    border-color: rgba(255, 255, 255, 0.05);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.hero-pane {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.hero-pane-text {
    max-width: 680px;
}

.hero-pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.hero-pill {
    padding: 10px 14px;
    border-radius: var(--border-radius-full);
    background: rgba(32, 152, 108, 0.1);
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    border: 1px solid rgba(32, 152, 108, 0.15);
    box-shadow: var(--shadow-sm);
}

.hero-title-simple {
    font-size: clamp(2.4rem, 5vw, 3.4rem);
    line-height: 1.1;
    font-weight: 800;
}

.hero-lead {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    max-width: 720px;
}

.hero-cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
}

.btn-link {
    color: var(--color-primary);
    font-weight: 700;
    text-decoration: none;
    padding: var(--space-xs) 0;
}

.btn-link:hover {
    text-decoration: underline;
}

.hero-meta-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-md);
}

.meta-card {
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
}

.meta-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.meta-value {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.1;
}

.meta-sub {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.hero-pane-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.hero-avatar-card {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: linear-gradient(145deg, rgba(32, 152, 108, 0.12), rgba(0, 123, 255, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.avatar-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 12px solid rgba(255, 255, 255, 0.6);
    mix-blend-mode: overlay;
    pointer-events: none;
}

[data-theme="dark"] .avatar-ring {
    border-color: rgba(255, 255, 255, 0.1);
}

.hero-avatar {
    width: 88%;
    height: 88%;
    object-fit: cover;
}

.avatar-badge {
    position: absolute;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: #ffffff;
    padding: 10px 16px;
    border-radius: var(--border-radius-full);
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.hero-skill-badges {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.hero-skill-badges span {
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.04);
    border-radius: var(--border-radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

[data-theme="dark"] .hero-skill-badges span {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .hero-simple-grid {
        padding: var(--space-xl);
    }

    .hero-avatar-card {
        width: 260px;
        height: 260px;
    }
}
.about-role {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.about-description {
    margin-bottom: var(--space-xl);
}

.about-description p {
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-lg);
    line-height: 1.7;
}

/* Contact Grid */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-surface-light);
    border-radius: var(--border-radius);
    transition: var(--transition-all);
}

.contact-item:hover {
    background: var(--color-surface-dark);
    transform: translateY(-2px);
}

.contact-item svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-item a {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition-all);
}

.contact-item a:hover {
    color: var(--color-primary);
}

/* About Actions */
.about-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Education Section */
.education-timeline {
    position: relative;
    padding-left: var(--space-xl);
}

.education-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-primary);
}

.education-item {
    position: relative;
    padding-bottom: var(--space-2xl);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.education-item::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 0;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 3px solid var(--color-background);
}

.education-item.current::before {
    background: var(--color-accent);
    box-shadow: 0 0 20px rgba(255, 122, 33, 0.5);
}

.education-icon {
    font-size: var(--font-size-2xl);
    margin-right: var(--space-md);
}

.education-content {
    flex: 1;
}

.education-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.education-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.education-details .institution {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.education-details .grade,
.education-details .status {
    font-weight: 600;
    color: var(--color-accent);
}

.education-details .coursework {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.skill-category {
    background: var(--color-surface-light);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    transition: var(--transition-all);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.skill-category-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    background: var(--color-surface-light);
    color: var(--color-text);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
}

.skill-tag:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* Experience Section */
.experience-grid {
    display: grid;
    gap: var(--space-xl);
}

.experience-item {
    background: var(--color-surface-light);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-primary);
    transition: all var(--transition-base);
}

.experience-item.featured {
    border-left-color: var(--color-accent);
    background: linear-gradient(135deg, var(--color-surface-light) 0%, rgba(32, 152, 108, 0.05) 100%);
}

.experience-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.experience-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.experience-icon {
    font-size: var(--font-size-2xl);
}

.experience-meta {
    flex: 1;
}

.experience-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.company {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.duration {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.experience-details {
    list-style: none;
    margin-bottom: var(--space-md);
}

.experience-details li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    line-height: 1.6;
}

.experience-details li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: var(--font-size-sm);
}

.experience-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.project-card {
    background: var(--color-surface-light);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 1px solid var(--color-border);
    position: relative;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    opacity: 0.7;
}

.project-card.featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.project-card.featured::before {
    opacity: 1;
    height: 6px;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

/* Project image styles removed - projects now display without images */

.project-content {
    padding: var(--space-2xl);
}

.project-timeline {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.project-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.project-title a {
    color: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.project-title a:hover {
    color: var(--color-primary);
}

.external-link-icon {
    font-size: var(--font-size-sm);
}

.project-description {
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    color: var(--color-text-muted);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tech-tag {
    background: var(--color-primary);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Publications Section */
.publications-container {
    max-width: 800px;
    margin: 0 auto;
}

.publication-item {
    background: var(--color-surface-light);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--color-accent);
    position: relative;
}

.publication-item.featured {
    box-shadow: var(--shadow-lg);
}

.publication-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
}

.publication-icon {
    font-size: var(--font-size-2xl);
}

.publication-badge {
    background: var(--color-accent);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.publication-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    color: var(--color-text);
    line-height: 1.4;
}

.publication-authors {
    font-style: italic;
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.publication-details {
    margin-bottom: var(--space-md);
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.publication-date {
    font-weight: 600;
    color: var(--color-primary);
}

.publication-doi a {
    color: var(--color-secondary);
    text-decoration: none;
}

.publication-doi a:hover {
    text-decoration: underline;
}

.publication-abstract {
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.publication-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.keyword-tag {
    background: var(--color-surface);
    color: var(--color-text);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-xs);
    border: 1px solid var(--color-border);
}

/* Certifications Section */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.cert-item {
    background: var(--color-surface-light);
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.cert-item.featured {
    border: 2px solid var(--color-accent);
    box-shadow: var(--shadow-md);
}

.cert-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cert-icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.cert-content {
    flex: 1;
}

.cert-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.cert-title a {
    color: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.cert-title a:hover {
    color: var(--color-secondary);
}

.cert-details {
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
}

.cert-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.cert-list li {
    padding: var(--space-xs) 0;
    position: relative;
    padding-left: var(--space-md);
}

.cert-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.cert-badge {
    background: var(--color-primary);
    color: white;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-top: var(--space-sm);
    display: inline-block;
}

/* Leadership Section */
.leadership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.leadership-item {
    background: var(--color-surface-light);
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.leadership-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.leadership-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--space-md);
}

.leadership-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.leadership-duration {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    font-weight: 600;
}

.leadership-description {
    line-height: 1.6;
    color: var(--color-text-muted);
}

/* Modern Contact Section */
.contact-section-modern {
    padding: 5rem 0;
    background: var(--color-background);
    position: relative;
}

.contact-grid-modern {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2.5rem;
    margin-top: 3rem;
}

/* CTA Card */
.contact-cta-card {
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.08), rgba(var(--color-primary-dark-rgb), 0.08));
    border: 2px solid rgba(var(--color-primary-rgb), 0.2);
    border-radius: 24px;
    padding: 3rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.contact-cta-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(var(--color-primary-rgb), 0.15);
    border-color: var(--color-primary);
}

[data-theme="dark"] .contact-cta-card {
    background: linear-gradient(135deg, rgba(var(--color-primary-dark-rgb), 0.15), rgba(var(--color-primary-rgb), 0.1));
    border-color: rgba(var(--color-primary-dark-rgb), 0.3);
}

.contact-cta-content {
    position: relative;
    z-index: 1;
}

.contact-cta-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 1), rgba(var(--color-primary-dark-rgb), 1));
    color: white;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.3);
}

.contact-cta-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.contact-cta-text {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

.contact-cta-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-contact-primary,
.btn-contact-secondary {
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-contact-primary {
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 1), rgba(var(--color-primary-dark-rgb), 1));
    color: white;
    box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.3);
}

.btn-contact-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(var(--color-primary-rgb), 0.4);
}

.btn-contact-secondary {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-contact-secondary:hover {
    background: var(--color-surface-light);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* Contact Methods */
.contact-methods-modern {
    background: var(--color-surface-light);
    border: 2px solid var(--color-border);
    border-radius: 24px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

[data-theme="dark"] .contact-methods-modern {
    background: #1e1e2e;
    border-color: rgba(255, 255, 255, 0.08);
}

.contact-methods-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 1rem;
}

.contact-method-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 12px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    text-decoration: none;
    transition: all 0.2s ease;
}

.contact-method-item:hover {
    transform: translateX(5px);
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.05), rgba(var(--color-primary-dark-rgb), 0.05));
}

[data-theme="dark"] .contact-method-item {
    background: #151822;
    border-color: rgba(255, 255, 255, 0.06);
}

.contact-method-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.1), rgba(var(--color-primary-dark-rgb), 0.1));
    border: 1px solid rgba(var(--color-primary-rgb), 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-primary);
}

.contact-method-content {
    flex: 1;
}

.contact-method-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.15rem;
}

.contact-method-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
}

.contact-availability {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 1rem;
    margin-top: 0.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.availability-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
    animation: pulse-indicator 2s infinite;
}

@keyframes pulse-indicator {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

@media (max-width: 968px) {
    .contact-grid-modern {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-cta-card {
        padding: 2rem;
    }
    
    .contact-cta-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 640px) {
    .contact-section-modern {
        padding: 3rem 0;
    }
    
    .contact-cta-actions {
        flex-direction: column;
    }
    
    .btn-contact-primary,
    .btn-contact-secondary {
        width: 100%;
        justify-content: center;
    }
}

.cta-content h3 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

.cta-content p {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.cta-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

/* Additional Info */
.additional-info {
    margin-top: var(--space-3xl);
    padding: var(--space-xl);
    background: var(--color-surface-light);
    border-radius: var(--border-radius-lg);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.info-item h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.info-item ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.info-item li {
    padding: var(--space-xs) 0;
    color: var(--color-text-muted);
}

/* Footer - Modern Professional Design */
.footer-modern {
    background: var(--color-surface-light);
    border-top: 2px solid var(--color-border);
    padding: 4rem 0 1.5rem;
    position: relative;
}

.footer-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, rgba(var(--color-primary-rgb), 1) 0%, rgba(var(--color-primary-dark-rgb), 1) 50%, var(--color-primary) 100%);
}

[data-theme="dark"] .footer-modern {
    background: #0f1419;
    border-top-color: rgba(255, 255, 255, 0.08);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin-bottom: 0.75rem;
}

.footer-logo-img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid rgba(var(--color-primary-rgb), 0.3);
    transition: all 0.3s ease;
    object-fit: cover;
}

.footer-logo:hover .footer-logo-img {
    transform: scale(1.05) rotate(3deg);
    border-color: var(--color-primary);
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.footer-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

.footer-tagline {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    line-height: 1.2;
}

.footer-description {
    color: var(--color-text-muted);
    line-height: 1.65;
    font-size: 0.9rem;
    max-width: 360px;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

.footer-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.5rem;
    letter-spacing: 0.3px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.footer-links li {
    margin: 0;
    padding: 0;
}

.footer-links li::before {
    content: none;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.footer-links a:hover {
    color: var(--color-primary);
    transform: translateX(3px);
}

.footer-links svg {
    width: 16px;
    height: 16px;
    opacity: 0.8;
}

[data-theme="light"] .footer-heading {
    color: #0f172a;
}

[data-theme="light"] .footer-links a {
    color: #475569;
}

[data-theme="light"] .footer-links a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    margin: 0;
}

.footer-location {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

.footer-location svg {
    opacity: 0.7;
}

.footer-meta-stack {
    display: grid;
    gap: 0.25rem;
    justify-items: end;
}

.footer-work-auth {
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

@media (max-width: 968px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .footer-modern {
        padding: 3rem 0 1.5rem;
    }
}

@media (max-width: 640px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }

    .footer-meta-stack {
        justify-items: center;
    }
    
    .footer-modern {
        padding: 2.5rem 0 1.25rem;
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 56px;
    height: 56px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    transition: var(--transition-all);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: var(--z-fixed);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

/* PWA Install Button */
.pwa-install {
    position: fixed;
    bottom: var(--space-xl);
    left: var(--space-xl);
    background: var(--color-secondary);
    color: white;
    border: none;
    border-radius: var(--border-radius-lg);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-all);
    z-index: var(--z-fixed);
}

.pwa-install.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.pwa-install:hover {
    background: var(--color-info);
    transform: translateY(-2px);
}

/* AOS Animation Classes */
[data-aos] {
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: none;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-down"] {
    transform: translateY(-30px);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="slide-up"] {
    transform: translateY(50px);
}

[data-aos="slide-right"] {
    transform: translateX(-50px);
}

[data-aos="slide-left"] {
    transform: translateX(50px);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="flip-left"] {
    transform: perspective(2500px) rotateY(-100deg);
}

[data-aos="flip-right"] {
    transform: perspective(2500px) rotateY(100deg);
}

[data-aos="flip-up"] {
    transform: perspective(2500px) rotateX(-100deg);
}

/* Enhanced Responsive Design */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--space-3xl);
    }

    .about-text {
        padding-left: 0;
    }

    .contact-methods-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--space-lg);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-lg);
    }

    .cta-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 0.75rem;
        --space-5xl: 3rem;
        --space-4xl: 2.5rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: var(--space-lg);
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        padding: var(--space-lg);
        gap: var(--space-md);
    }

    .contact-methods-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }

    .contact-card {
        padding: var(--space-xl);
    }

    .contact-cta {
        padding: var(--space-2xl);
    }

    .cta-actions {
        flex-direction: column;
        gap: var(--space-md);
    }

    .btn {
        padding: var(--space-md) var(--space-xl);
        font-size: var(--font-size-base);
        min-height: 48px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .leadership-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
        padding-top: var(--space-sm);
    }

    .back-to-top {
        bottom: var(--space-lg);
        right: var(--space-lg);
        width: 48px;
        height: 48px;
    }

    .pwa-install {
        bottom: var(--space-lg);
        left: var(--space-lg);
        padding: var(--space-sm) var(--space-md);
    }
}

@media (max-width: 480px) {
    .hero-stats {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        padding: var(--space-md);
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .profile-image {
        max-width: 250px;
        height: 250px;
    }

    .btn {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--font-size-sm);
        min-height: 44px;
    }

    .education-timeline {
        padding-left: var(--space-md);
    }

    .education-item {
        flex-direction: column;
        align-items: flex-start;
    }

    .contact-card {
        padding: var(--space-lg);
    }

    .contact-cta {
        padding: var(--space-xl);
    }

    .cta-content h3 {
        font-size: var(--font-size-2xl);
    }

    .cta-content p {
        font-size: var(--font-size-base);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .hero-description {
        font-size: var(--font-size-lg);
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-surface);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* Focus Styles for Accessibility */
button:focus,
input:focus,
textarea:focus,
a:focus,
.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #000000;
        --color-text-muted: var(--color-text);
    }

    [data-theme="light"] {
        --color-border: #000000;
        --color-text-muted: var(--color-text);
    }
}

/* Print Styles */
@media print {

    .header,
    .back-to-top,
    .pwa-install,
    .theme-toggle,
    .social-links {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    .section-title::after {
        display: none;
    }
}



/* prevents horizontal scrollbar or tiny right offset */
html,
body {
    overflow-x: hidden;
}

/* Theme toggle wrapper keeps layout visibility, detailed visuals live in css/themes/toggle.css */
#theme-toggle {
    display: flex !important;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 0;
    cursor: pointer;
    position: relative;
    z-index: 1000;
    opacity: 1 !important;
    visibility: visible !important;
    flex-shrink: 0;
    margin-left: 8px;
    padding: 0;
}

/* Ensure header actions container is visible and properly positioned */
.header-actions {
    display: flex !important;
    align-items: center;
    gap: 12px;
    opacity: 1 !important;
    visibility: visible !important;
    min-width: 60px;
    justify-content: flex-end;
}

/* ===================================================================
   ENHANCED INTERACTIVE FEATURES CSS
   =================================================================== */

/* 1. TYPING EFFECT */
.typing-text {
    color: var(--color-primary);
    font-weight: 600;
    min-height: 1.5em;
    display: inline-block;
}

.typing-cursor {
    color: var(--color-primary);
    animation: blink 1s infinite;
    font-weight: 100;
    font-size: 1.2em;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* 2. PARTICLE CANVAS */
.particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: auto;
}

.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    transition: transform 0.1s ease-out;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7), rgba(32, 152, 108, 0.3));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
}

/* 3. SCROLL PROGRESS BAR */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: transparent;
    z-index: 9999;
    pointer-events: none;
}

.scroll-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    width: 0%;
    transition: width 0.1s ease-out;
    box-shadow: 0 0 10px var(--color-primary);
}

/* 4. ENHANCED NAVBAR ON SCROLL */
.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .header.scrolled {
    background: rgba(26, 26, 26, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

/* 5. ENHANCED PROJECT CARDS */
.project-card {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(32, 152, 108, 0.1), rgba(0, 123, 255, 0.1));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.project-card:hover::before {
    opacity: 1;
}

.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(32, 152, 108, 0.3);
}

.project-content {
    position: relative;
    z-index: 1;
}

/* 6. ENHANCED SKILL TAGS */
.skill-tag {
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.skill-tag::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(32, 152, 108, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

.skill-tag:hover::before {
    width: 200%;
    height: 200%;
}

.skill-tag:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 20px rgba(32, 152, 108, 0.4);
    border-color: var(--color-primary);
}

/* 7. ENHANCED EXPERIENCE CARDS */
.experience-item {
    position: relative;
    overflow: hidden;
}

.experience-item::after {
    content: '';
    position: absolute;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(32, 152, 108, 0.1), transparent);
    transition: right 0.8s ease;
}

.experience-item:hover::after {
    right: 100%;
}

/* 8. ENHANCED STATS ANIMATION */
.stat-item {
    position: relative;
    overflow: hidden;
}

.stat-number {
    display: inline-block;
    font-weight: 700;
    color: var(--color-primary);
    font-size: 2.5rem;
    transition: transform 0.3s ease;
}

.stat-item:hover .stat-number {
    transform: scale(1.2);
}

/* 9. AOS ANIMATION CLASSES */
[data-aos] {
    opacity: 0;
    transition-property: transform, opacity;
    transition-duration: 0.6s;
    transition-timing-function: ease-out;
}

[data-aos].visible {
    opacity: 1;
}

[data-aos="fade-up"].visible {
    transform: translateY(0);
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-down"].visible {
    transform: translateY(0);
}

[data-aos="fade-down"] {
    transform: translateY(-30px);
}

[data-aos="fade-left"].visible {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-right"].visible {
    transform: translateX(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="zoom-in"].visible {
    transform: scale(1);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="flip-left"].visible {
    transform: perspective(1000px) rotateY(0);
}

[data-aos="flip-left"] {
    transform: perspective(1000px) rotateY(-20deg);
}

[data-aos="flip-right"].visible {
    transform: perspective(1000px) rotateY(0);
}

[data-aos="flip-right"] {
    transform: perspective(1000px) rotateY(20deg);
}

[data-aos="flip-up"].visible {
    transform: perspective(1000px) rotateX(0);
}

[data-aos="flip-up"] {
    transform: perspective(1000px) rotateX(20deg);
}

[data-aos="slide-up"].visible {
    transform: translateY(0);
}

[data-aos="slide-up"] {
    transform: translateY(50px);
}

[data-aos="slide-right"].visible {
    transform: translateX(0);
}

[data-aos="slide-right"] {
    transform: translateX(-50px);
}

[data-aos="slide-left"].visible {
    transform: translateX(0);
}

[data-aos="slide-left"] {
    transform: translateX(50px);
}

/* 10. BUTTON HOVER ENHANCEMENTS */
.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.5s ease, height 0.5s ease;
}

.btn:hover::before {
    width: 300%;
    height: 300%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(32, 152, 108, 0.4);
}

/* 11. CONTACT CARD ENHANCEMENTS */
.contact-card {
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.contact-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(32, 152, 108, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.contact-card:hover::after {
    opacity: 1;
}

.contact-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(32, 152, 108, 0.3);
}

/* 12. LOADING ENHANCEMENT */
.loading {
    transition: opacity 0.3s ease;
}

.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 13. PULSING AVAILABILITY BADGE */
.hero-badge .badge-dot {
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.3);
        opacity: 0.7;
    }
}

/* 14. PROFILE CARD ENHANCEMENT */
.profile-card {
    transition: all 0.4s ease;
}

.profile-card:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: 0 20px 40px rgba(32, 152, 108, 0.3);
}

.profile-image {
    transition: all 0.4s ease;
}

.profile-card:hover .profile-image {
    transform: scale(1.1);
}

/* 15. SMOOTH SECTION TRANSITIONS */
section {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* 16. ENHANCED FOOTER */
.footer {
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    animation: slide-line 3s ease-in-out infinite;
}

@keyframes slide-line {
    0%, 100% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(100%);
    }
}

/* 17. RESPONSIVE ENHANCEMENTS */
@media (max-width: 768px) {
    .typing-text {
        font-size: 0.9rem;
    }
    
    .particles-canvas {
        opacity: 0.5;
    }
    
    .project-card:hover {
        transform: translateY(-5px) scale(1.01);
    }
    
    .skill-tag:hover {
        transform: translateY(-3px) scale(1.05);
    }
}

/* 18. HIGH PERFORMANCE MODE */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .particles-canvas {
        display: none;
    }
}

/* 19. GLASSMORPHISM EFFECTS */
.header {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 20. TEXT GRADIENT EFFECTS */
.section-title {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===================================================================
   MODERN SKILLS PROGRESS BARS
   =================================================================== */

.skills-modern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-progress-section {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.skill-progress-section:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl);
}

.skill-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skills-progress-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-progress-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.skill-name {
    font-weight: 500;
    color: var(--color-text);
    font-size: 0.95rem;
}

.skill-percentage {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.9rem;
}

.skill-bar {
    height: 8px;
    background: var(--color-surface-dark);
    border-radius: var(--border-radius-full);
    overflow: hidden;
    position: relative;
}

.skill-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--border-radius-full);
    width: 0%;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    box-shadow: 0 0 10px rgba(32, 152, 108, 0.5);
}

.skill-bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Additional Skills Tags */
.additional-skills {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.skills-tags-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    text-align: center;
}

.skills-tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.skill-tag-modern {
    padding: 0.5rem 1rem;
    background: var(--color-surface-light);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    transition: all 0.3s ease;
    cursor: pointer;
}

.skill-tag-modern:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 5px 15px rgba(32, 152, 108, 0.4);
}

/* ===================================================================
   ACHIEVEMENTS SECTION
   =================================================================== */

.achievements-section {
    padding: 4.5rem 0;
    background: var(--color-background);
}

.achievements-grid {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(200px, 1fr);
    gap: 1.25rem;
    margin-top: 2rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
}

.achievement-card {
    background: var(--color-surface-light);
    padding: 1.25rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: none;
    transition: border-color 0.2s ease;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

/* Remove decorative top line */
.achievement-card::before { display: none; }

.achievement-card:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--color-primary);
}

.achievement-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-muted);
}

/* No fancy hover icon effects */
.achievement-card:hover .achievement-icon { color: var(--color-primary); }

.achievement-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
    font-family: var(--font-mono);
}

.education-period {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-primary-300);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

[data-theme="light"] .education-period {
    color: var(--color-primary-600); /* Darker green for high contrast in light mode */
}

.achievement-label {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 0.25rem;
    letter-spacing: 0.2px;
}

.achievement-description {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

/* ===================================================================
   RESUME DOWNLOAD ENHANCEMENT
   =================================================================== */

.btn-primary {
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '\u2193';
    position: absolute;
    right: -30px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    transition: right 0.3s ease;
    opacity: 0;
}

.btn-primary:hover::after {
    right: 15px;
    opacity: 1;
}

/* ===================================================================
   RESPONSIVE ENHANCEMENTS FOR NEW SECTIONS
   =================================================================== */

@media (max-width: 768px) {
    .skills-modern-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .skill-progress-section {
        padding: 1.5rem;
    }
    
    .achievements-grid {
        grid-auto-columns: minmax(200px, 75vw);
        gap: 1rem;
    }
    
    .achievement-card { padding: 1rem; }
    .achievement-icon { font-size: 1.25rem; }
    .achievement-number { font-size: 1.8rem; }
}

@media (max-width: 480px) {
    .achievements-grid {
        grid-auto-columns: 85vw;
    }
    
    .skills-tags-container {
        gap: 0.5rem;
    }
    
    .skill-tag-modern {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
}