/* Fluent 2 Design System Implementation */

:root {
  /* Colors */
  --bg-color: #faf9f8; /* Fluent Canvas Color */
  --bg-surface: #ffffff;
  --text-primary: #242424;
  --text-secondary: #5e5e5e;
  
  --accent-color: #0f6cbd; /* Fluent Blue */
  --accent-hover: #0c5392;
  --accent-pressed: #094071;
  
  --border-subtle: #edebe9;
  --border-strong: #8a8886;
  
  /* Materials */
  --acrylic-bg: rgba(255, 255, 255, 0.7);
  
  /* Geometry */
  --radius-small: 4px; /* standard button/input */
  --radius-medium: 8px; /* standard card */
  --radius-large: 12px; /* modal */
  
  /* Elevation Shadows */
  --shadow-card: 0 1.6px 3.6px 0 rgba(0,0,0,0.132), 0 0.3px 0.9px 0 rgba(0,0,0,0.108);
  --shadow-card-hover: 0 6.4px 14.4px 0 rgba(0,0,0,0.132), 0 1.2px 3.6px 0 rgba(0,0,0,0.108);
  --shadow-modal: 0 25.6px 57.6px 0 rgba(0,0,0,0.22), 0 4.8px 14.4px 0 rgba(0,0,0,0.18);
  
  --transition-fast: 100ms cubic-bezier(0.33, 0, 0.67, 1);
  --transition-normal: 250ms cubic-bezier(0.33, 0, 0.67, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI Variable", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg-color);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1;
}

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

a:hover {
  text-decoration: underline;
}

/* Base Panel / Card */
.fluent-card {
  background: var(--bg-surface);
  border-radius: var(--radius-medium);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
  border: 1px solid transparent; /* Prepare for high contrast modes */
}

.fluent-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-1px);
}

/* Buttons */
.btn-container {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 24px;
}

.btn-primary {
  background: var(--accent-color);
  color: white;
  border: 1px solid transparent;
  padding: 6px 16px;
  min-height: 32px;
  border-radius: var(--radius-small);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none !important;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:active {
  background: var(--accent-pressed);
  box-shadow: none;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 6px 16px;
  min-height: 32px;
  border-radius: var(--radius-small);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none !important;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.btn-secondary:hover {
  background: #f3f2f1;
}

.btn-secondary:active {
  background: #edebe9;
  box-shadow: none;
}

/* Form Elements */
input, textarea {
  font-family: inherit;
  width: 100%;
  padding: 6px 12px;
  border-radius: var(--radius-small);
  border: 1px solid var(--border-subtle);
  background: #ffffff;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition-fast), border-bottom-color var(--transition-fast);
  /* Fluent bottom line */
  border-bottom: 1px solid var(--border-strong);
}

input:hover, textarea:hover {
  border-bottom-color: var(--text-primary);
}

input:focus, textarea:focus {
  border-color: var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
  padding-bottom: 5px; /* Offset the 2px border */
}

/* Micro-animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.4s cubic-bezier(0.33, 0, 0.67, 1) forwards;
  opacity: 0;
}

.animate-delay-1 { animation-delay: 0.05s; }
.animate-delay-2 { animation-delay: 0.1s; }
.animate-delay-3 { animation-delay: 0.15s; }

/* Instagram Style Grid */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  padding: 24px 0;
}

.grid-item {
  aspect-ratio: 1;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-medium);
  cursor: pointer;
  background: var(--bg-surface);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.grid-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 40%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

.grid-title {
  font-size: 16px;
  font-weight: 600;
  color: white;
}

/* Modal - Fluent dialog style */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

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

.modal-content {
  background: var(--bg-surface);
  width: 100%;
  max-width: 900px;
  border-radius: var(--radius-large);
  overflow: hidden;
  position: relative;
  transform: scale(0.98);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-modal);
  display: flex;
  flex-direction: row;
  max-height: 85vh;
}

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

#modal-image-container {
  flex: 1.2;
  background: #f5f5f7;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.modal-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-body {
  flex: 1;
  padding: 32px 32px 32px 32px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: transparent;
  color: var(--text-primary);
  border: none;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-small);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: background var(--transition-fast);
  font-size: 20px;
  line-height: 1;
}

.modal-close:hover {
  background: rgba(0,0,0,0.05);
}

/* Navigation - Fluent Acrylic */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--acrylic-bg);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 24px;
  height: 48px;
}

.logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none !important;
}

.nav-links {
  display: flex;
  gap: 24px;
}

.nav-link {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-primary);
  text-decoration: none !important;
  padding: 4px 8px;
  border-radius: var(--radius-small);
  transition: background var(--transition-fast);
}

.nav-link:hover {
  background: rgba(0,0,0,0.04);
}

.nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-toggle {
  display: none;
}

/* Container */
.container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 48px 24px;
}

/* Typography Headings */
h1, h2, h3, h4 {
  font-weight: 600;
  color: var(--text-primary);
}
h1 { font-size: 42px; line-height: 1.2; margin-bottom: 16px; }
h2 { font-size: 32px; line-height: 1.25; margin-bottom: 16px; }
h3 { font-size: 20px; line-height: 1.3; }
h4 { font-size: 16px; line-height: 1.4; }
p { margin-bottom: 16px; color: var(--text-primary); font-size: 14px; }

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

/* Hero Section */
.hero {
  text-align: center;
  padding: 80px 24px;
  margin-bottom: 40px;
}
.hero h1 {
  font-size: 52px;
}
.hero p {
  font-size: 20px;
  color: var(--text-secondary);
}

/* Custom Emoticon Button */
.emoji-btn {
  font-size: 24px;
  text-decoration: none !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-surface);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}
.emoji-btn:hover {
  transform: translateY(-2px) scale(1.1);
  box-shadow: var(--shadow-card-hover);
}
.emoji-btn:active {
  transform: scale(0.95);
  box-shadow: none;
}

/* --- Mobile Responsive Mode --- */
@media screen and (max-width: 768px) {
  /* Navigation */
  .navbar {
    height: auto !important;
    padding: 0 !important;
  }
  .nav-container {
    flex-direction: column !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    height: auto !important;
    padding: 12px 16px !important;
    gap: 0 !important;
  }
  .nav-header {
    display: flex !important;
    width: 100% !important;
    justify-content: space-between !important;
    align-items: center !important;
  }
  .logo {
    text-align: left !important;
    width: auto !important;
    font-size: 20px !important;
  }
  .nav-toggle {
    display: flex !important;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-small);
    transition: background var(--transition-fast);
  }
  .nav-toggle:hover {
    background: rgba(0,0,0,0.05);
  }
  .nav-links {
    flex-direction: column !important;
    width: 100% !important;
    display: none !important;
    padding-top: 16px !important;
    gap: 8px !important;
  }
  .nav-links.active {
    display: flex !important;
  }
  .nav-link {
    width: 100% !important;
    text-align: center !important;
    padding: 12px !important;
    font-size: 16px !important;
    border-radius: var(--radius-medium) !important;
  }

  /* Typography */
  h1 { font-size: 32px !important; line-height: 1.2 !important; text-align: center !important; }
  h2 { font-size: 24px !important; text-align: center !important; }
  h3 { font-size: 20px !important; }
  .hero h1 { font-size: 32px !important; text-align: center !important; }
  
  /* Layout & Spacing */
  main { padding: 24px 16px !important; }
  .container { padding: 24px 16px !important; }
  .hero { padding: 32px 16px !important; margin-bottom: 24px !important; }
  .hero-split { 
    gap: 32px !important; 
    margin-bottom: 32px !important; 
    flex-direction: column !important; 
    align-items: center !important;
    justify-content: center !important;
  }
  
  .hero-image {
    width: 100% !important;
    display: flex !important;
    justify-content: center !important;
    align-items: center !important;
  }
  .hero-image video {
    max-width: 220px !important;
    margin: 0 auto !important;
    display: block !important;
  }
  
  /* Adjusting inline flex alignment */
  .hero-text { 
    width: 100% !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    text-align: center !important; 
  }
  .hero-text > div { 
    align-items: center !important;
    text-align: center !important; 
  }
  .hero-text p {
    text-align: center !important;
  }
  .hero-text .btn-container { 
    justify-content: center !important; 
    width: 100% !important;
  }
  
  /* Cards */
  .fluent-card { padding: 20px !important; }
  .grid-container { grid-template-columns: 1fr !important; }
  
  /* Forms */
  input, textarea { font-size: 16px !important; } /* Prevents iOS auto-zoom */
  
  /* Modal */
  .modal-overlay { padding: 16px !important; }
  .modal-content { 
    max-width: 100% !important; 
    margin: 0 !important; 
    flex-direction: column !important;
    max-height: 90vh !important;
  }
  #modal-image-container {
    max-height: 35vh !important;
    flex: none !important;
  }
  .modal-body {
    padding: 24px !important;
  }
  
  /* Buttons */
  .btn-container { flex-wrap: wrap !important; justify-content: center !important; gap: 12px !important; }
  .btn-primary, .btn-secondary { 
    width: 100% !important; 
    max-width: 250px !important; 
    min-height: 44px !important; /* Larger touch target for mobile */
    font-size: 16px !important;
  }
}

/* --- Site Footer --- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 32px 24px;
  margin-top: 64px;
  text-align: center;
}

.footer-container {
  max-width: 1024px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.footer-container p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--accent-color);
}

/* --- Cookie Banner --- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--bg-surface);
  box-shadow: var(--shadow-modal);
  padding: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 16px;
  border: 1px solid var(--border-subtle);
  transition: opacity 0.3s ease;
}

.cookie-content p {
  margin: 0;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
}

.cookie-link {
  font-weight: 600;
}

.cookie-buttons {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

@media screen and (max-width: 768px) {
  .cookie-banner {
    padding: 16px;
  }
  .cookie-buttons {
    flex-direction: column;
    width: 100%;
  }
  .cookie-buttons button {
    width: 100%;
    max-width: none;
  }
}

/* --- Exam Paper Specific Styles --- */
:root {
  --paper-bg: #fdfbf7;
  --paper-text: #1e293b;
  --paper-text-secondary: #475569;
  --paper-border: #cbd5e1;
}

.exam-paper-container {
  display: flex;
  justify-content: center;
  padding: 2rem 0;
}

.exam-paper {
  background: var(--paper-bg);
  color: var(--paper-text);
  width: 100%;
  max-width: 950px;
  min-height: 1200px; /* Approximate legal size proportion */
  padding: 4rem 3rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border-radius: 4px;
  position: relative;
}

.exam-paper h1, .exam-paper h2, .exam-paper h3 {
  color: var(--paper-text);
}

.exam-paper p {
  color: var(--paper-text-secondary);
}

.exam-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

@media (max-width: 768px) {
  .exam-columns {
    grid-template-columns: 1fr;
  }
  .exam-paper {
    padding: 2rem 1.5rem;
    min-height: auto;
  }
}

.paper-option {
  transition: all 0.2s ease;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.4rem 0.5rem;
  border-radius: 4px;
}

.paper-option:hover:not(.disabled) {
  background-color: rgba(0, 0, 0, 0.03);
  transform: translateX(4px);
}

.btn-paper {
  background-color: var(--paper-border);
  color: var(--paper-text);
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-paper:hover {
  background-color: #94a3b8;
  color: white;
}
.btn-paper:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.btn-paper-primary {
  background-color: var(--accent-color);
  color: white;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-paper-primary:hover {
  background-color: var(--accent-hover);
}

.fade-in-up {
  animation: fadeInUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}