/* ==========================================================================
   600IQ NU CGPA Calculator - Style System
   Self-contained Vanilla CSS with Light / Dark Theme Support
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Color Palette - Light Mode (Default) */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #2563eb; /* Academic Blue */
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-border: #bfdbfe;
  --accent-text: #1e40af;

  --success-color: #059669;
  --success-bg: #ecfdf5;
  --success-border: #a7f3d0;

  --warning-color: #d97706;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;

  --danger-color: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;

  --input-bg: #ffffff;
  --input-border: #cbd5e1;
  --input-focus-border: #2563eb;
  --input-focus-ring: rgba(37, 99, 235, 0.2);

  --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 -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Dark Mode Overrides */
[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-secondary: #131b2e;
  --bg-tertiary: #1e293b;
  --card-bg: #131b2e;
  --card-border: #2e3a52;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;

  --accent-primary: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-light: #1e293b;
  --accent-border: #2563eb;
  --accent-text: #60a5fa;

  --success-color: #10b981;
  --success-bg: #064e3b;
  --success-border: #047857;

  --input-bg: #1e293b;
  --input-border: #334155;
  --input-focus-border: #3b82f6;
  --input-focus-ring: rgba(59, 130, 246, 0.3);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.5);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  text-decoration: underline;
}

/* --- Header Component --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .site-header {
  background-color: rgba(19, 27, 46, 0.85);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand-logo:hover {
  text-decoration: none;
}

.brand-badge {
  background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--accent-primary);
  text-decoration: none;
}

.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform 0.1s ease;
}

.theme-toggle-btn:hover {
  border-color: var(--accent-border);
  transform: scale(1.05);
}

/* --- Container & Main Layout --- */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  width: 100%;
  flex: 1;
}

/* Hero Section */
.hero-section {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 2.5rem;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent-primary), #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--accent-light);
  border: 1px solid var(--accent-border);
  color: var(--accent-text);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
}

.trust-badge a {
  color: var(--accent-primary);
  font-weight: 600;
  text-decoration: underline;
}

/* --- Tool Control Panel --- */
.calculator-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 1.75rem;
  margin-bottom: 2rem;
  transition: border-color var(--transition-normal);
}

.selector-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-select, .form-input {
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text-primary);
  font-size: 0.95rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  outline: none;
  width: 100%;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-select:focus, .form-input:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px var(--input-focus-ring);
}

/* Program Mode Toggle Pills */
.mode-toggle-group {
  display: flex;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  gap: 0.25rem;
}

.mode-toggle-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mode-toggle-btn.active {
  background-color: var(--card-bg);
  color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
}

/* Top Live Summary Bar */
.results-dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.result-card {
  background: linear-gradient(145deg, var(--card-bg), var(--bg-tertiary));
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.result-card.highlight {
  border-color: var(--accent-border);
  background: var(--accent-light);
}

.result-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.quick-copy-btn {
  background: var(--card-bg);
  border: 1px solid var(--accent-border);
  color: var(--accent-primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1.2;
}

.quick-copy-btn:hover {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.result-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}


.result-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.result-card.highlight .result-value {
  color: var(--accent-primary);
}

.result-subtext {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.class-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background-color: var(--success-bg);
  color: var(--success-color);
  border: 1px solid var(--success-border);
}

/* --- Multi-Year Builder Cards --- */
.year-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.year-header {
  background-color: var(--bg-tertiary);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--card-border);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.year-title-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.year-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.year-gpa-badge {
  background-color: var(--accent-light);
  color: var(--accent-primary);
  border: 1px solid var(--accent-border);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.btn-remove-year {
  background: transparent;
  border: none;
  color: var(--danger-color);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.btn-remove-year:hover {
  background-color: var(--danger-bg);
}

/* Course Item Card Grid */
/* Compact Subject Table & Row Layout */
.subject-table-container {
  width: 100%;
  padding: 0.25rem 0;
}

.subject-row-header {
  display: grid;
  grid-template-columns: 2.2fr 0.8fr 1.8fr 0.8fr 0.4fr;
  gap: 0.75rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--card-border);
}

.subject-rows-group {
  display: flex;
  flex-direction: column;
}

.subject-row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--card-border);
  transition: background-color var(--transition-fast);
}

.subject-row:last-child {
  border-bottom: none;
}

.subject-row:hover {
  background-color: var(--bg-primary);
}

.subject-row-top {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
}

.subject-row-top .input-course-name {
  flex: 1;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  min-width: 0;
}

.credit-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.mobile-credit-label {
  display: none;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.input-course-credits {
  width: 56px;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  padding: 0.45rem 0.25rem;
}

.subject-row-bottom {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
}

.subject-row-bottom .select-course-grade {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  min-width: 0;
}

.field-points {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  flex-shrink: 0;
  min-width: 55px;
  justify-content: center;
}

.pts-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 600;
}

.btn-delete-row {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.3rem 0.5rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.btn-delete-row:hover {
  color: var(--danger-color);
  background-color: var(--danger-bg);
}

/* Desktop Optimization (> 640px) */
@media (min-width: 641px) {
  .mobile-credit-label {
    display: none;
  }

  .pts-label {
    display: none;
  }

  .subject-row {
    display: grid;
    grid-template-columns: 2.2fr 0.8fr 1.8fr 0.8fr 0.4fr;
    gap: 0.75rem;
    align-items: center;
    padding: 0.6rem 1.25rem;
  }

  .subject-row-top {
    display: contents;
  }

  .subject-row-bottom {
    display: contents;
  }
}

@media (max-width: 640px) {
  .subject-row-header {
    display: none;
  }

  .mobile-credit-label {
    display: inline;
  }
}




.btn-delete-row {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.btn-delete-row:hover {
  color: var(--danger-color);
  background-color: var(--danger-bg);
}


.year-footer {
  padding: 0.85rem 1.25rem;
  background-color: var(--bg-primary);
  border-top: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Button UI */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), transform 0.1s ease;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  border-color: var(--card-border);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--card-border);
  text-decoration: none;
}

.btn-outline {
  background-color: transparent;
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-outline:hover {
  background-color: var(--accent-light);
  text-decoration: none;
}

.action-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
  margin-bottom: 3rem;
}

.action-buttons-group {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  flex-wrap: wrap;
  width: 100%;
}

@media (max-width: 640px) {
  .action-buttons-group {
    flex-direction: column;
    align-items: stretch;
  }
  .action-buttons-group .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Printable PDF Styles */
@media print {
  header, 
  footer, 
  nav, 
  .site-header, 
  .site-footer, 
  .floating-cgpa-bar, 
  .action-bar, 
  .more-tools-section, 
  .seo-article-section, 
  .faq-section, 
  .scale-card, 
  .notice-box, 
  .selector-grid, 
  .btn, 
  .btn-delete-row, 
  .btn-add-course, 
  .btn-remove-year, 
  #theme-toggle-btn {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-family: Arial, sans-serif !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  .app-container {
    max-width: 100% !important;
    padding: 0 !important;
    box-shadow: none !important;
  }

  .calculator-card {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    background: transparent !important;
  }

  .results-dashboard {
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: 1rem !important;
    margin-top: 1.5rem !important;
    page-break-inside: avoid;
  }

  .result-card {
    border: 1px solid #cbd5e1 !important;
    background: #f8fafc !important;
    box-shadow: none !important;
  }

  .result-card.highlight {
    background: #eff6ff !important;
    border-color: #2563eb !important;
  }

  .year-card {
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
    margin-bottom: 1.5rem !important;
    page-break-inside: avoid;
  }

  .course-item-card {
    border: 1px solid #e2e8f0 !important;
    background: #ffffff !important;
    padding: 0.75rem !important;
  }
}


/* Department Context Banner */
.dept-context-banner {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(99, 102, 241, 0.08));
  border: 1px solid var(--accent-border);
  color: var(--accent-text);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
  transition: all var(--transition-fast);
}

.dept-context-banner .context-icon {
  font-size: 1.25rem;
}

/* Notice Box */
.notice-box {
  background-color: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-color);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.66rem;
  margin-bottom: 1.25rem;
}


/* --- Grading Scale Reference Card --- */
.scale-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow-sm);
}

.scale-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.scale-item {
  background-color: var(--bg-primary);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.8rem;
  text-align: center;
}

.scale-letter {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.scale-point {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.scale-range {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* --- SEO Content Section --- */
.seo-section {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow-sm);
}

.seo-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 2rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.seo-content h2:first-child {
  margin-top: 0;
}

.seo-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.seo-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}

.seo-content ul, .seo-content ol {
  margin-bottom: 1.2rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.seo-content li {
  margin-bottom: 0.5rem;
}

.formula-box {
  background-color: var(--bg-tertiary);
  border-left: 4px solid var(--accent-primary);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--text-primary);
  margin: 1.5rem 0;
  line-height: 1.6;
}

/* --- FAQ Accordion Section --- */
.faq-section {
  margin-bottom: 4rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  text-align: center;
  color: var(--text-primary);
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-header {
  padding: 1.1rem 1.35rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform var(--transition-normal);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-body {
  padding: 0 1.35rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  display: none;
}

.faq-item.open .faq-body {
  display: block;
}

/* --- Related Tools --- */
.related-tools-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--card-border);
}

.related-tools-section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.related-tool-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.related-tool-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  text-decoration: none;
}

.related-tool-icon {
  font-size: 1.75rem;
  line-height: 1;
}

.related-tool-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.related-tool-desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- Shared Footer (Homepage & Standard Tool Style) --- */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--card-border);
  padding: 4rem 0 2rem 0;
}

.site-footer .container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1rem;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  gap: 3rem;
  flex-wrap: wrap;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--card-border);
}

.footer-brand {
  max-width: 320px;
}

.site-footer .brand-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.site-footer .logo-badge {
  font-weight: 800;
  font-size: 1.6rem;
  letter-spacing: -0.02em;
}

.logo-number {
  color: var(--accent-primary);
}

.logo-letters {
  color: var(--text-primary);
}

.footer-tagline {
  margin-top: 0.85rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.footer-links-group {
  display: flex;
  gap: 4rem;
  flex-wrap: wrap;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  font-size: 0.825rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.6rem;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-full);
}

.status-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success-color);
}

.copyright {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --- Floating CGPA Quick Pill --- */
.floating-cgpa-bar {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 99;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--accent-border);
  box-shadow: var(--shadow-lg);
  padding: 0.6rem 1.1rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  user-select: none;
}

[data-theme="dark"] .floating-cgpa-bar {
  background-color: rgba(19, 27, 46, 0.92);
}

.floating-cgpa-bar:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px -5px rgba(0, 0, 0, 0.2);
}

.floating-cgpa-icon {
  font-size: 1.1rem;
}

.floating-cgpa-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.floating-cgpa-val {
  color: var(--accent-primary);
  font-weight: 800;
}

.floating-cgpa-btn {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: var(--accent-light);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
  .main-wrapper {
    padding: 1.25rem 1rem 3rem;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .results-dashboard {
    grid-template-columns: 1fr 1fr;
  }

  .related-tools-grid {
    grid-template-columns: 1fr;
  }

  .footer-container {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-links-group {
    gap: 2.5rem;
  }

  .course-table th, .course-table td {
    padding: 0.5rem 0.6rem;
  }

  .action-bar {
    flex-direction: column;
    width: 100%;
  }

  .action-bar .btn {
    width: 100%;
  }

  .floating-cgpa-bar {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
    justify-content: space-between;
    padding: 0.6rem 1rem;
  }
}