/*============================================================================
  ACADEMIC THEME - Premium Education UI/UX Enhancement System
  Rabindra Yuva Kalyan Kendra Foundation
  Color Palette, Reusable Components, Cards & Responsive Layouts
============================================================================*/

:root {
    --primary: #0B1E3F;
    --primary-dark: #061430;
    --secondary: #1E3A5F;
    --copper: #B87333;
    --copper-light: #D69A65;
    --copper-rgb: 184, 115, 51;
    --accent: #0D9488;
    --accent-rgb: 13, 148, 136;

    --background: #FBF9F6;
    --surface: #FFFFFF;
    --surface-soft: #F4F0E9;

    --text-primary: #172033;
    --text-secondary: #64748B;
    --border: #E5E7EB;

    --success: #15803D;
    --warning: #B45309;
    --danger: #DC2626;

    --shadow-sm: 0 4px 12px rgba(11, 30, 63, 0.06);
    --shadow-md: 0 12px 32px rgba(11, 30, 63, 0.10);
    --shadow-lg: 0 24px 60px rgba(11, 30, 63, 0.14);

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    
    /* Legacy aliases mapped to academic palette */
    --gold: var(--copper);
    --gold-rgb: var(--copper-rgb);
    --ivory: var(--background);
    --cream: var(--surface-soft);
    --pearl: var(--surface-soft);
    --charcoal: var(--text-primary);
    --slate: var(--text-secondary);
    --emerald: var(--accent);
    --main-bg: var(--background);
    --section-bg: var(--surface-soft);
    --royal-blue: var(--primary);
    --secondary-blue: var(--secondary);
}

/* ── Typography & Global Defaults ── */
body {
    background-color: var(--background);
    color: var(--text-primary);
    font-family: 'Inter', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--primary);
    font-family: 'Playfair Display', Georgia, serif;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.015em;
}

p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}

/* ── Global Section Standards ── */
.academic-section {
    padding: 85px 0;
    position: relative;
}

.academic-section.bg-soft {
    background-color: var(--surface-soft);
}

.academic-section.bg-surface {
    background-color: var(--surface);
}

.academic-section.bg-dark {
    background: linear-gradient(145deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #ffffff;
}

.academic-section.bg-dark h1,
.academic-section.bg-dark h2,
.academic-section.bg-dark h3,
.academic-section.bg-dark h4 {
    color: #ffffff;
}

.academic-section.bg-dark p {
    color: #cbd5e1;
}

/* ── Academic Section Header Component ── */
.academic-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 52px;
}

.academic-header.text-left {
    text-align: left;
    margin-left: 0;
}

.pre-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(184, 115, 51, 0.09);
    border: 1px solid rgba(184, 115, 51, 0.22);
    border-radius: 50px;
    color: var(--copper);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    margin-bottom: 14px;
    font-family: 'Inter', sans-serif;
}

.academic-section.bg-dark .pre-badge {
    background: rgba(214, 154, 101, 0.15);
    border-color: rgba(214, 154, 101, 0.35);
    color: var(--copper-light);
}

.academic-header h2 {
    font-size: 38px;
    margin-bottom: 14px;
}

@media (max-width: 768px) {
    .academic-header h2 {
        font-size: 28px;
    }
}

.academic-header p {
    font-size: 16px;
    margin: 0 auto;
}

.copper-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--copper), var(--copper-light));
    border-radius: 3px;
    margin: 16px auto 0;
}

.academic-header.text-left .copper-divider {
    margin-left: 0;
}

/* ── Standard Button System ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 28px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #ffffff !important;
    box-shadow: 0 4px 16px rgba(11, 30, 63, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(11, 30, 63, 0.35);
    color: #ffffff !important;
}

.btn-copper {
    background: linear-gradient(135deg, var(--copper) 0%, var(--copper-light) 100%);
    color: #ffffff !important;
    box-shadow: 0 4px 16px rgba(184, 115, 51, 0.28);
}

.btn-copper:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 26px rgba(184, 115, 51, 0.40);
    color: #ffffff !important;
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--border);
    color: var(--primary) !important;
}

.btn-outline:hover {
    border-color: var(--copper);
    color: var(--copper) !important;
    background: rgba(184, 115, 51, 0.05);
    transform: translateY(-2px);
}

.academic-section.bg-dark .btn-outline {
    border-color: rgba(255, 255, 255, 0.3);
    color: #ffffff !important;
}

.academic-section.bg-dark .btn-outline:hover {
    border-color: var(--copper-light);
    color: var(--copper-light) !important;
    background: rgba(214, 154, 101, 0.1);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 15px;
}

/* ── Academic Card Base ── */
.academic-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    padding: 32px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.academic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(184, 115, 51, 0.3);
}

/* Top Accent Line on Cards */
.academic-card.accent-top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--copper), var(--copper-light));
    opacity: 0;
    transition: var(--transition);
}

.academic-card.accent-top:hover::before {
    opacity: 1;
}

/* ── Course Card Component ── */
.course-card-premium {
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.course-card-premium:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(184, 115, 51, 0.35);
}

.course-card-thumb {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--surface-soft);
}

.course-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.course-card-premium:hover .course-card-thumb img {
    transform: scale(1.05);
}

.course-badge-category {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(11, 30, 63, 0.88);
    backdrop-filter: blur(8px);
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    padding: 5px 12px;
    border-radius: 50px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.course-badge-duration {
    position: absolute;
    bottom: 14px;
    right: 14px;
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.course-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-card-title {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--primary);
    line-height: 1.35;
}

.course-card-desc {
    font-size: 13.5px;
    color: var(--text-secondary);
    margin-bottom: 18px;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card-footer {
    padding-top: 16px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.course-card-fees {
    font-size: 16px;
    font-weight: 700;
    color: var(--copper);
}

/* ── Standard Page Hero Banner Component ── */
.page-hero-banner {
    padding: 130px 0 65px;
    background: linear-gradient(150deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #ffffff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 15% 30%, rgba(184, 115, 51, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 85% 70%, rgba(13, 148, 136, 0.10) 0%, transparent 50%);
    pointer-events: none;
}

.page-hero-banner h1 {
    font-size: 44px;
    color: #ffffff;
    margin-bottom: 14px;
    position: relative;
}

@media (max-width: 768px) {
    .page-hero-banner {
        padding: 110px 0 50px;
    }
    .page-hero-banner h1 {
        font-size: 32px;
    }
}

.page-hero-banner p {
    color: #cbd5e1;
    font-size: 16px;
    max-width: 680px;
    margin: 0 auto 20px;
    position: relative;
}

.breadcrumb-nav {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: #94a3b8;
    background: rgba(255, 255, 255, 0.08);
    padding: 6px 18px;
    border-radius: 50px;
    position: relative;
}

.breadcrumb-nav a {
    color: #ffffff;
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb-nav a:hover {
    color: var(--copper-light);
}

.breadcrumb-nav span {
    color: var(--copper-light);
}

/* ── Statistics Card Component ── */
.stat-box-academic {
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-box-academic:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(184, 115, 51, 0.3);
}

.stat-box-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(184, 115, 51, 0.1);
    color: var(--copper);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 16px;
}

.stat-box-number {
    font-size: 38px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
    margin-bottom: 6px;
    font-family: 'Outfit', 'Inter', sans-serif;
}

.stat-box-label {
    font-size: 13.5px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ── Academic Grids ── */
.academic-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.academic-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.academic-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

@media (max-width: 992px) {
    .academic-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    .academic-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    .academic-grid-2 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .academic-grid-4,
    .academic-grid-3 {
        grid-template-columns: 1fr;
    }
}

/* ── Lightbox Modal for Gallery ── */
.academic-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(6, 20, 48, 0.95);
    z-index: 99999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 30px;
    backdrop-filter: blur(8px);
}

.academic-lightbox.active {
    display: flex;
}

.academic-lightbox-img {
    max-width: 90vw;
    max-height: 85vh;
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.15);
}

.academic-lightbox-close {
    position: absolute;
    top: 25px;
    right: 25px;
    color: #ffffff;
    font-size: 32px;
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.academic-lightbox-close:hover {
    color: var(--copper-light);
    transform: rotate(90deg);
}

/* ── Accessibility & Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}