/* ============================================
   Braintube - Design System & Global Styles
   A Modern, Premium VTU Student Platform
   ============================================ */

/* ==========================================
   CSS VARIABLES - Design Tokens
   ========================================== */
:root {
    /* Primary Colors - Deep Purple to Cyan Gradient */
    --primary-50: #f5f3ff;
    --primary-100: #ede9fe;
    --primary-200: #ddd6fe;
    --primary-300: #c4b5fd;
    --primary-400: #a78bfa;
    --primary-500: #8b5cf6;
    --primary-600: #7c3aed;
    --primary-700: #6d28d9;
    --primary-800: #5b21b6;
    --primary-900: #4c1d95;

    /* Accent Colors - Electric Cyan */
    --accent-50: #ecfeff;
    --accent-100: #cffafe;
    --accent-200: #a5f3fc;
    --accent-300: #67e8f9;
    --accent-400: #22d3ee;
    --accent-500: #06b6d4;
    --accent-600: #0891b2;
    --accent-700: #0e7490;
    --accent-800: #155e75;
    --accent-900: #164e63;

    /* Success Colors */
    --success-50: #f0fdf4;
    --success-500: #22c55e;
    --success-600: #16a34a;

    /* Warning Colors */
    --warning-50: #fffbeb;
    --warning-500: #f59e0b;
    --warning-600: #d97706;

    /* Error Colors */
    --error-50: #fef2f2;
    --error-500: #ef4444;
    --error-600: #dc2626;

    /* Neutral Colors */
    --neutral-50: #fafafa;
    --neutral-100: #f4f4f5;
    --neutral-200: #e4e4e7;
    --neutral-300: #d4d4d8;
    --neutral-400: #a1a1aa;
    --neutral-500: #71717a;
    --neutral-600: #52525b;
    --neutral-700: #3f3f46;
    --neutral-800: #27272a;
    --neutral-900: #18181b;
    --neutral-950: #09090b;

    /* Semantic Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-card: rgba(26, 26, 37, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);

    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    --border-color: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(139, 92, 246, 0.5);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
    --gradient-secondary: linear-gradient(135deg, #7c3aed 0%, #0891b2 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #12121a 100%);
    --gradient-card: linear-gradient(145deg, rgba(139, 92, 246, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.15) 0%, transparent 70%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-display: 'Outfit', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
    --shadow-glow-accent: 0 0 40px rgba(6, 182, 212, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;

    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.7);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --border-color: rgba(0, 0, 0, 0.1);
    --gradient-dark: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    --gradient-card: linear-gradient(145deg, rgba(139, 92, 246, 0.05) 0%, rgba(6, 182, 212, 0.02) 100%);
}

/* ==========================================
   CSS RESET & BASE STYLES
   ========================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background Effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        var(--gradient-glow),
        radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 20% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, var(--text-6xl));
}

h2 {
    font-size: clamp(2rem, 4vw, var(--text-5xl));
}

h3 {
    font-size: clamp(1.5rem, 3vw, var(--text-4xl));
}

h4 {
    font-size: var(--text-2xl);
}

h5 {
    font-size: var(--text-xl);
}

h6 {
    font-size: var(--text-lg);
}

p {
    color: var(--text-secondary);
    max-width: 65ch;
}

a {
    color: var(--primary-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-400);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button,
input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

ul,
ol {
    list-style: none;
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-6);
    }
}

.section {
    padding: var(--space-16) 0;
}

@media (min-width: 768px) {
    .section {
        padding: var(--space-24) 0;
    }
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

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

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-2 {
    gap: var(--space-2);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-6 {
    gap: var(--space-6);
}

.gap-8 {
    gap: var(--space-8);
}

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

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ==========================================
   BUTTON COMPONENTS
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-weight: 600;
    font-size: var(--text-sm);
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-500);
}

.btn-outline {
    background: transparent;
    color: var(--primary-400);
    border: 2px solid var(--primary-500);
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary-500);
    color: white;
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    border-radius: var(--radius-xl);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: var(--radius-lg);
}

.loader-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ==========================================
   CARD COMPONENTS
   ========================================== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    backdrop-filter: blur(20px);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.card-gradient {
    background: var(--gradient-card);
}

.card-header {
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.card-description {
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

/* ==========================================
   NAVIGATION / HEADER
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 10, 15, 0.95);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    padding: 0 var(--space-4);
    max-width: var(--container-xl);
    margin: 0 auto;
}

@media (min-width: 768px) {
    .header-inner {
        padding: 0 var(--space-6);
    }
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
}

.nav {
    display: none;
}

@media (min-width: 1024px) {
    .nav {
        display: flex;
        align-items: center;
        gap: var(--space-1);
    }
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-link.active {
    color: var(--primary-400);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Mobile Menu Button */
.menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

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

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

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

/* Mobile Navigation */
.mobile-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: var(--z-fixed);
    overflow-y: auto;
}

.mobile-nav.active {
    transform: translateX(0);
}

.mobile-nav-link {
    display: block;
    padding: var(--space-4);
    color: var(--text-primary);
    font-size: var(--text-lg);
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 30% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 70% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
    animation: heroFloat 20s ease-in-out infinite;
}

@keyframes heroFloat {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(2%, 2%) rotate(1deg);
    }

    50% {
        transform: translate(0, 4%) rotate(0deg);
    }

    75% {
        transform: translate(-2%, 2%) rotate(-1deg);
    }
}

.hero-content {
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.6s ease forwards;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success-500);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.hero-title {
    margin-bottom: var(--space-6);
    animation: fadeInUp 0.6s ease 0.1s forwards;
    opacity: 0;
}

.hero-subtitle {
    font-size: clamp(var(--text-lg), 3vw, var(--text-xl));
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    animation: fadeInUp 0.6s ease 0.2s forwards;
    opacity: 0;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    animation: fadeInUp 0.6s ease 0.3s forwards;
    opacity: 0;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-color);
    animation: fadeInUp 0.6s ease 0.4s forwards;
    opacity: 0;
}

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

.hero-stat-value {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-stat-label {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--space-1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================
   BRANCHES SECTION
   ========================================== */
.branches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-6);
}

.branch-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: var(--space-8);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(20px);
    transition: all var(--transition-base);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}

.branch-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.branch-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
}

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

.branch-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    font-size: var(--text-2xl);
    margin-bottom: var(--space-5);
}

.branch-name {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    color: var(--text-primary);
}

.branch-fullname {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

.branch-meta {
    display: flex;
    gap: var(--space-4);
    margin-top: auto;
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.branch-meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* ==========================================
   SEMESTER NAVIGATION
   ========================================== */
.semester-nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: center;
    margin-bottom: var(--space-8);
}

.semester-btn {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    font-weight: 700;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.semester-btn:hover {
    border-color: var(--primary-500);
    color: var(--primary-400);
    transform: translateY(-2px);
}

.semester-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-glow);
}

/* ==========================================
   SUBJECT CARDS
   ========================================== */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-6);
}

.subject-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    backdrop-filter: blur(20px);
    transition: all var(--transition-base);
}

.subject-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
}

.subject-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.subject-code {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: var(--primary-500);
    color: white;
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-md);
}

.subject-credits {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.subject-name {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
}

.subject-resources {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.resource-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

.resource-tag.available {
    background: rgba(34, 197, 94, 0.1);
    border-color: rgba(34, 197, 94, 0.3);
    color: var(--success-500);
}

.subject-actions {
    display: flex;
    gap: var(--space-2);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-color);
}

.subject-actions .btn {
    flex: 1;
}

/* ==========================================
   RESOURCE TABS
   ========================================== */
.tabs {
    display: flex;
    gap: var(--space-1);
    padding: var(--space-1);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    overflow-x: auto;
}

.tab {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: transparent;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    background: var(--bg-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

/* ==========================================
   RESOURCE ITEMS
   ========================================== */
.resource-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.resource-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.resource-item:hover {
    border-color: var(--border-glow);
    background: rgba(139, 92, 246, 0.05);
}

.resource-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    font-size: var(--text-xl);
    flex-shrink: 0;
}

.resource-info {
    flex: 1;
    min-width: 0;
}

.resource-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
    line-height: 1.4;
}

.resource-meta {
    display: flex;
    gap: var(--space-4);
    font-size: var(--text-sm);
    color: var(--text-muted);
}

.resource-actions {
    display: flex;
    gap: var(--space-2);
}

@media (max-width: 640px) {
    .resource-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .resource-actions {
        width: 100%;
        margin-top: var(--space-2);
    }

    .resource-actions .btn {
        flex: 1;
    }

    .resource-meta {
        flex-wrap: wrap;
        gap: var(--space-2) var(--space-4);
    }
}

/* Premium Badge */
.premium-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #1a1a25;
    font-size: var(--text-xs);
    font-weight: 700;
    border-radius: var(--radius-sm);
}

/* ==========================================
   PRICING SECTION
   ========================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    backdrop-filter: blur(20px);
    transition: all var(--transition-base);
}

.pricing-card.featured {
    border-color: var(--primary-500);
    box-shadow: var(--shadow-glow);
}

.pricing-card.featured::before {
    content: 'Most Popular';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-1) var(--space-4);
    background: var(--gradient-primary);
    color: white;
    font-size: var(--text-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border-color);
}

.pricing-name {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.pricing-price {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: 700;
}

.pricing-price span {
    font-size: var(--text-base);
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.pricing-feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.pricing-feature svg {
    width: 20px;
    height: 20px;
    color: var(--success-500);
    flex-shrink: 0;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr 1.5fr;
    }
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.contact-item {
    display: flex;
    gap: var(--space-4);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    font-size: var(--text-xl);
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: var(--text-base);
    margin-bottom: var(--space-1);
}

.contact-text p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* ==========================================
   FORM COMPONENTS
   ========================================== */
.form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 640px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand p {
    font-size: var(--text-sm);
    margin-top: var(--space-4);
    max-width: 300px;
}

.footer-title {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-4);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-400);
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--primary-500);
    border-color: var(--primary-500);
    color: white;
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

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

/* ==========================================
   SECTION HEADER COMPONENT
   ========================================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-12);
}

.section-header h2 {
    margin-bottom: var(--space-4);
}

.section-header p {
    margin: 0 auto;
}

/* ==========================================
   BREADCRUMB NAVIGATION
   ========================================== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4) 0;
    font-size: var(--text-sm);
    color: var(--text-muted);
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--primary-400);
}

.breadcrumb-separator {
    color: var(--text-muted);
}

.breadcrumb-current {
    color: var(--text-primary);
}

/* ==========================================
   SEARCH COMPONENT
   ========================================== */
.search-container {
    position: relative;
    max-width: 500px;
    margin: 0 auto var(--space-8);
}

.search-input {
    width: 100%;
    padding: var(--space-4) var(--space-5) var(--space-4) var(--space-12);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* ==========================================
   TOAST / NOTIFICATION
   ========================================== */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-color: var(--success-500);
}

.toast.error {
    border-color: var(--error-500);
}

/* ==========================================
   LOADING STATES
   ========================================== */
.skeleton {
    background: linear-gradient(90deg,
            var(--bg-tertiary) 0%,
            var(--bg-secondary) 50%,
            var(--bg-tertiary) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ==========================================
   MODAL COMPONENT
   ========================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--error-500);
    color: white;
}

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-6);
    border-top: 1px solid var(--border-color);
}

/* ==========================================
   RESPONSIVE UTILITIES
   ========================================== */
@media (max-width: 640px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 641px) and (max-width: 1023px) {
    .hide-tablet {
        display: none !important;
    }
}

@media (min-width: 1024px) {
    .hide-desktop {
        display: none !important;
    }
}

/* ==========================================
   PAGE-SPECIFIC STYLES
   ========================================== */

/* Branch Page Hero */
.page-hero {
    padding: calc(72px + var(--space-12)) 0 var(--space-12);
    background: var(--gradient-dark);
    position: relative;
}

.page-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to top, var(--bg-primary), transparent);
}

/* ==========================================
   ANIMATIONS
   ========================================== */
.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.slide-up {
    animation: slideUp 0.5s ease forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger children animation */
.stagger-children>* {
    opacity: 0;
    animation: fadeInUp 0.5s ease forwards;
}

.stagger-children>*:nth-child(1) {
    animation-delay: 0.1s;
}

.stagger-children>*:nth-child(2) {
    animation-delay: 0.2s;
}

.stagger-children>*:nth-child(3) {
    animation-delay: 0.3s;
}

.stagger-children>*:nth-child(4) {
    animation-delay: 0.4s;
}

.stagger-children>*:nth-child(5) {
    animation-delay: 0.5s;
}

.stagger-children>*:nth-child(6) {
    animation-delay: 0.6s;
}

.stagger-children>*:nth-child(7) {
    animation-delay: 0.7s;
}

.stagger-children>*:nth-child(8) {
    animation-delay: 0.8s;
}

/* ==========================================
   PREMIUM ENHANCEMENTS
   ========================================== */

/* Avatar Icon for Testimonials */
.avatar-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

/* Step Numbers for How It Works */
.step-icon {
    position: relative;
}

.step-number {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 700;
    color: white;
}

/* Star Rating */
.star-rating {
    display: flex;
    gap: 2px;
}

/* Footer Contact Items */
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    transition: color var(--transition-fast);
}

.footer-contact-item:hover {
    color: var(--primary-400);
}

.footer-contact-item svg {
    flex-shrink: 0;
}

/* Footer Bottom Layout */
.footer-bottom-left,
.footer-bottom-right {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }

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

/* ==========================================
   ENHANCED MOBILE RESPONSIVENESS
   ========================================== */

/* Fix mobile menu and navigation glitches */
@media (max-width: 767px) {

    /* Prevent horizontal scroll */
    html,
    body {
        overflow-x: hidden;
        width: 100%;
    }

    /* Better hero spacing on mobile */
    .hero {
        min-height: auto;
        padding: calc(72px + var(--space-8)) 0 var(--space-12);
    }

    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

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

    .hero-stats {
        gap: var(--space-4);
    }

    .hero-stat-value {
        font-size: var(--text-2xl);
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    /* Better card grid on mobile */
    .branches-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .subjects-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    /* Better section padding on mobile */
    .section {
        padding: var(--space-10) 0;
    }

    .section-header {
        margin-bottom: var(--space-8);
    }

    .section-header h2 {
        font-size: clamp(1.5rem, 6vw, 2rem);
    }

    /* Fix footer on mobile */
    .footer {
        padding: var(--space-10) 0 var(--space-6);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .footer-brand p {
        max-width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .footer-bottom-left,
    .footer-bottom-right {
        align-items: center;
        text-align: center;
    }

    /* Better button sizing on mobile */
    .btn-lg {
        padding: var(--space-3) var(--space-6);
        font-size: var(--text-sm);
    }

    /* Fix mobile navigation */
    .mobile-nav {
        padding: var(--space-4);
    }

    .mobile-nav-link {
        padding: var(--space-3);
        font-size: var(--text-base);
    }

    /* Better cards on mobile */
    .card {
        padding: var(--space-5);
    }

    .branch-card {
        padding: var(--space-5);
    }

    .branch-icon {
        width: 56px;
        height: 56px;
    }

    /* Fix tabs on mobile */
    .tabs {
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .tabs::-webkit-scrollbar {
        display: none;
    }

    .tab {
        min-width: max-content;
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }

    /* Fix pricing grid on mobile */
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    /* Fix contact grid on mobile */
    .contact-grid {
        grid-template-columns: 1fr;
    }

    /* Better form layout on mobile */
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Small mobile devices */
@media (max-width: 374px) {
    .header-inner {
        padding: 0 var(--space-3);
    }

    .logo {
        font-size: var(--text-lg);
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }

    .btn {
        padding: var(--space-2) var(--space-4);
        font-size: var(--text-xs);
    }

    .hero-badge {
        font-size: var(--text-xs);
    }
}

/* Tablet specific fixes */
@media (min-width: 768px) and (max-width: 1023px) {
    .branches-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .subjects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Fix for iOS Safari */
@supports (-webkit-touch-callout: none) {
    .hero {
        min-height: -webkit-fill-available;
    }
}

/* Smooth transitions for all interactive elements */
button,
a,
.card,
.btn,
input,
textarea,
select {
    -webkit-tap-highlight-color: transparent;
}

/* Better focus states for accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Prevent layout shift on page load */
.stagger-children>* {
    will-change: opacity, transform;
}

/* ==========================================
   USER MENU & DROPDOWN
   ========================================== */
.user-menu {
    position: relative;
}

.user-profile-btn {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    padding: var(--space-1) var(--space-4) var(--space-1) var(--space-1);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.user-profile-btn:hover {
    background: var(--bg-card);
    border-color: var(--primary-500);
}

.user-profile-btn .avatar {
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: white;
    font-size: var(--text-sm);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-3));
    right: 0;
    width: 240px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-2);
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    z-index: 1000;
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: var(--space-3) var(--space-4);
}

.dropdown-header strong {
    display: block;
    color: var(--text-primary);
    font-size: var(--text-base);
}

.dropdown-header span {
    color: var(--text-muted);
    font-size: var(--text-xs);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--space-2) 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    color: var(--text-secondary);
    font-size: var(--text-sm);
    text-align: left;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: none;
    border: none;
    cursor: pointer;
}

.dropdown-item:hover {
    background: rgba(139, 92, 246, 0.1);
    color: var(--primary-400);
}

.text-danger {
    color: #ef4444 !important;
}

.text-danger:hover {
    background: rgba(239, 68, 68, 0.1) !important;
}

@media (max-width: 768px) {
    .user-profile-btn {
        padding: 0;
        border: none;
        background: none;
    }

    .user-profile-btn .avatar {
        width: 36px;
        height: 36px;
    }
}