/* ===================================================================
   UNIFIED DESIGN SYSTEM - Portfolio Wide
   Master stylesheet for complete consistency
   =================================================================== */

/* ============ COLOR SYSTEM ============ */
:root {
    /* Theme-driven gradient */
    --gradient-primary: linear-gradient(135deg, rgba(var(--color-primary-rgb), 1) 0%, rgba(var(--color-primary-dark-rgb), 1) 100%);
    --color-purple-light: var(--color-primary);
    --color-purple-dark: var(--color-primary-dark);

    /* Card System */
    --card-bg-light: #ffffff;
    --card-bg-dark: #1e1e2e;
    --card-border: rgba(var(--color-primary-rgb), 0.15);
    --card-border-hover: var(--color-primary);
    --card-radius: 20px;
    --card-padding: 2rem;

    /* Shadows */
    --shadow-base: 0 4px 15px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 50px rgba(var(--color-primary-rgb), 0.15);
    --shadow-active: 0 25px 60px rgba(var(--color-primary-rgb), 0.25);

    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.3s ease;
}

/* ============ UNIVERSAL CARD SYSTEM ============ */
.card-unified,
.about-card,
.education-card-modern,
.experience-card-compact,
.project-card,
.achievement-card,
.leadership-card {
    background: var(--card-bg-light);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    border: 2px solid var(--card-border);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-base);
    will-change: transform, box-shadow;
}

.card-unified:hover,
.about-card:hover,
.education-card-modern:hover,
.experience-card-compact:hover,
.project-card:hover,
.achievement-card:hover,
.leadership-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--card-border-hover);
}

[data-theme="dark"] .card-unified,
[data-theme="dark"] .about-card,
[data-theme="dark"] .education-card-modern,
[data-theme="dark"] .experience-card-compact,
[data-theme="dark"] .project-card,
[data-theme="dark"] .achievement-card,
[data-theme="dark"] .leadership-card {
    background: var(--card-bg-dark);
    border-color: rgba(var(--color-primary-rgb), 0.2);
}

/* ============ SECTION HEADERS ============ */
.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: 0.75rem;
    color: var(--color-text);
    line-height: 1.2;
}

.section-subtitle {
    font-size: clamp(0.9rem, 2vw, 1rem);
    color: var(--color-text-muted);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
    line-height: 1.6;
}

/* ============ GRADIENT HIGHLIGHTS ============ */
.highlight-word {
    background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 1) 0%, rgba(var(--color-primary-dark-rgb), 1) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============ RESPONSIVE CONTAINERS ============ */
.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Mobile First - Extra Small (320px - 479px) */
@media (min-width: 320px) {
    .container {
        max-width: 100%;
        padding: 0 1rem;
    }
}

/* Small Mobile (480px - 599px) */
@media (min-width: 480px) {
    .container {
        max-width: 540px;
        padding: 0 1.25rem;
    }
}

/* Large Mobile (600px - 767px) */
@media (min-width: 600px) {
    .container {
        max-width: 640px;
        padding: 0 1.5rem;
    }
}

/* Tablet Portrait (768px - 1023px) */
@media (min-width: 768px) {
    .container {
        max-width: 720px;
        padding: 0 2rem;
    }
}

/* Tablet Landscape (1024px - 1199px) */
@media (min-width: 1024px) {
    .container {
        max-width: 960px;
    }
}

/* Small Desktop (1200px - 1439px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
}

/* Desktop (1440px - 1919px) */
@media (min-width: 1440px) {
    .container {
        max-width: 1320px;
    }
}

/* Large Desktop (1920px - 2559px) */
@media (min-width: 1920px) {
    .container {
        max-width: 1400px;
    }
}

/* Ultra Wide (2560px+) */
@media (min-width: 2560px) {
    .container {
        max-width: 1600px;
    }
}

/* ============ GRADIENT HIGHLIGHTS ============ */
.highlight-word,
.highlight-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    font-size: inherit;
}

/* ============ ICON BADGES ============ */
.icon-badge {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.5rem;
    transition: var(--transition-fast);
}

.icon-badge:hover {
    transform: scale(1.1) rotate(5deg);
}

/* ============ TECH CHIPS/TAGS ============ */
.tech-chip,
.detail-tag {
    padding: 0.4rem 0.75rem;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-purple-light);
    transition: var(--transition-fast);
}

.tech-chip:hover,
.detail-tag:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-2px);
}

/* ============ BUTTONS ============ */
.btn-unified {
    padding: 0.875rem 1.75rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    border: 2px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.btn-primary-unified {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-base);
}

.btn-primary-unified:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* ============ GRID LAYOUTS ============ */
.grid-2-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.grid-3-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.grid-4-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

/* ============ SECTION SPACING ============ */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

/* ============ ANIMATIONS ============ */
/* All sections use data-aos="zoom-in" with staggered delays */
[data-aos="zoom-in"] {
    opacity: 0;
    transform: scale(0.95);
}

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

/* ============ RESPONSIVE ============ */
@media (max-width: 968px) {

    .grid-2-col,
    .grid-3-col,
    .grid-4-col {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    section {
        padding: 4rem 0;
    }
}

@media (max-width: 640px) {

    .grid-2-col,
    .grid-3-col,
    .grid-4-col {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.75rem;
    }

    section {
        padding: 3rem 0;
    }
}