/* ==========================================================================
   Forsko - Syllabus & Practical Module Stylesheet
   Theme: Dark Blue (#0F172A) | Sky Blue (#3B82F6) | Liquid Glass
   ========================================================================== */

:root {
  --dark-blue: #0F172A;
  --dark-blue-card: #1E293B;
  --dark-blue-deep: #0B1120;
  --sky-blue: #3B82F6;
  --sky-blue-hover: #2563EB;
  --sky-blue-light: rgba(59, 130, 246, 0.15);
  --white: #FFFFFF;
  --light-gray: #F8FAFC;
  --border-gray: rgba(255, 255, 255, 0.1);
  --text-muted: #94A3B8;

  --emerald-green: #10B981;
  --emerald-green-light: rgba(16, 185, 129, 0.15);

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 30px -5px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.35);

  --transition-fast: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.title-gradient {
  background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Exo 2', 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--dark-blue-deep);
  color: var(--white);
  line-height: 1.6;
}

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

ul {
  list-style: none;
}

/* Page Blur Effect when Password Locked */
.blur-content {
  filter: blur(12px);
  pointer-events: none;
  transition: filter 0.4s ease;
}

.blur-content.unlocked {
  filter: blur(0);
  pointer-events: auto;
}

/* ==========================================================================
   1. Sticky Navbar
   ========================================================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(15, 23, 42, 0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-image {
  width: 140px;
  height: 140px;
  object-fit: contain;
}

.logo span {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--white);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--sky-blue);
  transition: var(--transition-fast);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   2. Hero Section
   ========================================================================== */

.syllabus-hero {
  position: relative;
  background: radial-gradient(circle at top center, #1E293B, var(--dark-blue));
  padding: 80px 24px 60px 24px;
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border-gray);
}

.hero-glow {
  position: absolute;
  top: -50px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero-container {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  background-color: rgba(255, 255, 255, 0.05);
  padding: 6px 16px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--sky-blue);
}

.breadcrumb .separator {
  font-size: 0.7rem;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -1px;
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  font-weight: 400;
}

.hero-institution {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}

.inst-college {
  font-size: 0.98rem;
  font-weight: 600;
  color: #ffffff;
}

.inst-university {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ==========================================================================
   3. Year Cards Section (3-Column Desktop Layout)
   ========================================================================== */

.years-section {
  padding: 80px 24px 100px 24px;
  background-color: var(--dark-blue);
}

.years-container {
  max-width: 1200px;
  margin: 0 auto;
}

.years-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr); /* 3 Cards Side-by-Side on Desktop */
  gap: 30px;
}

.year-card {
  background-color: var(--dark-blue-card);
  border: 1px solid var(--border-gray);
  border-radius: 16px;
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.year-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--sky-blue), #60A5FA);
  opacity: 0;
  transition: var(--transition-fast);
}

.year-card:not(.year-card-disabled):hover {
  transform: translateY(-10px);
  border-color: rgba(59, 130, 246, 0.4);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.year-card:not(.year-card-disabled):hover::before {
  opacity: 1;
}

.year-card-disabled {
  opacity: 0.75;
}

.year-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.card-icon {
  width: 58px;
  height: 58px;
  border-radius: 12px;
  background-color: var(--sky-blue-light);
  color: var(--sky-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  transition: var(--transition-fast);
}

.year-card:not(.year-card-disabled):hover .card-icon {
  background-color: var(--sky-blue);
  color: var(--white);
  transform: scale(1.08);
}

/* Badges */
.badge {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-block;
}

.badge-available {
  color: var(--emerald-green);
  background-color: var(--emerald-green-light);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-coming-soon {
  color: var(--text-muted);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.year-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 8px;
}

.year-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 28px;
  flex-grow: 1;
}

/* Year Buttons */
.year-btn {
  width: 100%;
  background-color: var(--sky-blue);
  color: var(--white);
  border: none;
  padding: 14px 20px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition-fast);
  box-sizing: border-box;
}

.year-btn:not(.year-btn-disabled):hover {
  background-color: var(--sky-blue-hover);
  box-shadow: var(--shadow-glow);
}

.year-btn i {
  transition: var(--transition-fast);
}

.year-btn:not(.year-btn-disabled):hover i {
  transform: translateX(4px);
}

.year-btn-disabled {
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  cursor: not-allowed;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   4. LIQUID GLASS PASSWORD PROTECTION MODAL
   ========================================================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(11, 17, 32, 0.85);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.modal-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.glass-modal {
  background: rgba(30, 41, 59, 0.85);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  width: 100%;
  max-width: 440px;
  padding: 38px 28px;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 35px rgba(59, 130, 246, 0.3);
  transform: scale(1);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.hidden .glass-modal {
  transform: scale(0.92) translateY(20px);
}

.modal-header {
  text-align: center;
  margin-bottom: 24px;
}

.modal-icon-wrapper {
  width: 58px;
  height: 58px;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px auto;
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.35);
}

.modal-icon {
  font-size: 1.5rem;
  color: #3b82f6;
}

.modal-title {
  font-family: 'Exo 2', 'Inter', system-ui, sans-serif;
  font-size: 1.55rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 8px;
}

.modal-subtitle {
  font-size: 0.88rem;
  color: #94a3b8;
  line-height: 1.5;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.password-input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.modal-input {
  width: 100%;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  padding: 14px 44px 14px 16px;
  font-family: inherit;
  font-size: 0.95rem;
  color: #ffffff;
  outline: none;
  transition: all 0.25s ease;
}

.modal-input:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 18px rgba(59, 130, 246, 0.45);
  background: rgba(15, 23, 42, 0.9);
}

.password-toggle-btn {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: #94a3b8;
  font-size: 1rem;
  cursor: pointer;
  padding: 6px;
  transition: color 0.2s ease;
}

.password-toggle-btn:hover {
  color: #3b82f6;
}

.modal-error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #f87171;
  font-size: 0.83rem;
  font-weight: 600;
  padding: 10px 14px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  animation: shake 0.35s ease-in-out;
}

.modal-error-msg.hidden {
  display: none !important;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.modal-submit-btn {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #ffffff;
  border: none;
  border-radius: 12px;
  padding: 14px 20px;
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
  transition: all 0.25s ease;
}

.modal-submit-btn:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 0 25px rgba(59, 130, 246, 0.6);
  transform: translateY(-2px);
}

/* ==========================================================================
   5. Footer Section
   ========================================================================== */

.footer {
  background-color: var(--dark-blue-deep);
  color: var(--white);
  padding: 80px 24px 30px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1.2fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-col.brand-col p {
  color: var(--text-muted);
  margin-top: 16px;
  font-size: 0.95rem;
  line-height: 1.6;
}

.footer-col h3 {
  font-size: 1.05rem;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul a {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.footer-col ul a:hover {
  color: var(--sky-blue);
  padding-left: 4px;
}

.contact-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.contact-list i {
  color: var(--sky-blue);
}

.community-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.github-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--white);
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.github-btn:hover {
  background-color: var(--sky-blue);
  border-color: var(--sky-blue);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ==========================================================================
   6. Responsive Media Queries
   ========================================================================== */

@media (max-width: 1024px) {
  .years-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 74px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 74px);
    background-color: var(--dark-blue);
    flex-direction: column;
    padding: 40px 24px;
    gap: 20px;
    transition: var(--transition-smooth);
  }

  .nav-menu.active {
    left: 0;
  }

  .hero-title {
    font-size: 2.2rem;
  }

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

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