@import url('https://fonts.googleapis.com/css2?family=Dancing+Script:wght@700&display=swap');

/* Base and Reset */
:root {
  --primary: #ffffff;
  --primary-light: rgba(255, 255, 255, 0.1);
  --primary-muted: rgba(255, 255, 255, 0.3);
  --bg: rgba(10, 10, 10, 0.7);
  --bg-alt: rgba(0, 0, 0, 0.9);
  --border: rgba(255, 255, 255, 0.15);
  --text: #ffffff;
  --text-muted: #a1a1aa;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.7);
  --transition: all 0.3s ease;
}

.download-btn {
  color: #3b82f6 !important;
  transition: var(--transition);
}

.download-btn:hover {
  color: #60a5fa !important;
}

body {
    background-color: #000000;
    color: var(--text);
    overflow-x: hidden;
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    -webkit-text-size-adjust: 100%;
    margin: 0;
    padding: 80px 0 0 0;
}

/* 3D and Glassmorphism utilities for Index */
.glass-nav {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.glass-card {
    background: var(--bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    transform-style: preserve-3d;
    transform: perspective(1000px);
}

.card-content {
    transform: translateZ(30px);
}

.card-icon {
    transform: translateZ(50px);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #000000;
}
::-webkit-scrollbar-thumb {
    background: #27272a;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #3f3f46;
}

/* Base Layout for Legacy Pages */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text);
    margin-top: 0;
}

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

a:hover {
    color: #d4d4d8;
}

/* Legacy Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 15px 0;
}

.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-text {
    font-family: 'Dancing Script', cursive;
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(45deg, #a1a1aa 10%, #ffffff 50%, #d4d4d8 90%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding: 0 5px;
    letter-spacing: 1px;
}

.navbar-links {
    display: flex;
    gap: 20px;
}

.navbar-links a {
    color: var(--text-muted);
    font-weight: 500;
}

.navbar-links a:hover, .navbar-links a.active {
    color: #fff;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: #fff;
    margin-bottom: 5px;
}

@media (max-width: 768px) {
    .navbar-links {
        display: none;
    }
    .nav-toggle {
        display: block;
    }
}

.mobile-menu {
    display: none;
}
.mobile-menu.open {
    display: block;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
}
.mobile-menu-panel {
    display: flex; flex-direction: column; padding: 20px;
}
.mobile-menu-panel a { padding: 15px; border-bottom: 1px solid var(--border); color: #fff; }

/* Sections & Headers */
.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, #ffffff, rgba(255, 255, 255, 0.2));
    margin: 15px auto;
    border-radius: 2px;
}

/* Legacy Cards and Components */
.card, .contact-card, .subject-card, .about-stat {
    background: var(--bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 25px;
    transition: var(--transition);
    transform-style: preserve-3d;
    transform: perspective(1000px);
    text-decoration: none;
    color: inherit;
}

.card:hover, .contact-card:hover, .subject-card:hover, .about-stat:hover {
    transform: perspective(1000px) translateY(-5px) rotateX(2deg) rotateY(-2deg);
    border-color: var(--primary-muted);
    box-shadow: 0 10px 40px rgba(255, 255, 255, 0.05);
}

.subject-card-head {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 15px;
}
.subject-card-footer {
    display: flex; align-items: center; justify-content: space-between; margin-top: 15px; border-top: 1px solid var(--border); padding-top: 15px;
}
.subject-card-footer .arrow {
    width: 30px; height: 30px; border-radius: 50%; background: var(--primary-light); display: flex; align-items: center; justify-content: center;
}

/* Page Hero */
.page-hero {
    padding: 120px 0 60px;
    text-align: center;
    background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(10,10,10,0.8) 100%);
    position: relative;
}

.page-hero-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
    transform: translateZ(30px);
}

.breadcrumb {
    margin-bottom: 20px;
    color: var(--text-muted);
    font-size: 14px;
}

.breadcrumb a {
    color: var(--primary);
    margin: 0 10px;
}

/* Grid Layouts */
.subjects-grid, .contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

/* Icons */
.subject-icon, .contact-card-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border: 1px solid var(--primary-muted);
}
.contact-card-icon { margin-right: 15px; margin-bottom: 0; }
.contact-card { display: flex; align-items: flex-start; }
.contact-card-text { text-align: left; }

/* Footer */
.site-footer {
    background: var(--bg-alt);
    border-top: 1px solid var(--border);
    padding: 60px 0 20px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col ul {
    list-style: none;
    padding: 0;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: var(--text-muted);
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--primary);
    color: #000;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 99;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

/* Fix missing old CSS layout classes */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.about-stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
@media (max-width: 480px) {
  .about-stat-row { grid-template-columns: 1fr; gap: 12px; }
}
.about-image-col { text-align: center; padding: 40px; background: var(--bg); border-radius: var(--radius-xl); border: 1px solid var(--border); }
@media (max-width: 768px) { .about-intro { grid-template-columns: 1fr; } }
.badge { display: inline-block; padding: 5px 12px; border-radius: 20px; font-size: 12px; background: var(--primary-light); color: #fff; margin: 0 5px; }

/* Filter Tabs */
.year-filter { display: flex; justify-content: center; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
.year-btn { background: var(--bg); border: 1px solid var(--border); color: var(--text); padding: 8px 20px; border-radius: 20px; cursor: pointer; transition: var(--transition); }
.year-btn.active, .year-btn:hover { background: var(--primary); color: #000; border-color: var(--primary); }
.year-content { display: none; }
.year-content.active { display: block; }

/* PDF Modal Styles */
.pdf-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.pdf-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.pdf-modal-content {
  width: 90%;
  max-width: 900px;
  height: 85vh;
  background: rgba(15, 15, 15, 0.95);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
  transform: scale(0.95);
  transition: transform 0.3s ease;
}

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

.pdf-modal-header {
  padding: 15px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pdf-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.3s ease;
}

.pdf-close-btn:hover {
  color: #ef4444;
}

.pdf-modal-body {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0; 
  background: #f8fafc; /* Light bg for iframe to look clean */
  border-radius: 0 0 12px 12px;
  overflow: hidden;
}

.pdf-not-found {
  text-align: center;
  padding: 40px;
  background: var(--bg); 
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border-radius: 0 0 12px 12px;
}