:root {
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  --bg-slate: #f8fafc;
  --text-main: #1e293b;
  --text-muted: #64748b;
  
  /* Category Colors */
  --color-mandated: #3b82f6;
  --color-school: #f59e0b;
  --color-elective: #10b981;
  --color-deepening: #eab308;
  --color-advanced-free: #f59e0b;
  --color-remedial: #e11d48;
  --color-experimental: #8b5cf6;
  
  --gradient-hero: linear-gradient(135deg, #1e3a8a 0%, #0f172a 100%);
  --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);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
  font-family: 'Outfit', 'Noto Sans TC', sans-serif;
  background-color: var(--bg-slate);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Glassmorphism Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  padding: 0.75rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
}

.brand svg {
  width: 1.75rem;
  height: 1.75rem;
  color: var(--primary-color);
}

.brand span {
  background: #eff6ff;
  color: var(--primary-color);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-weight: 500;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}

.mobile-preview-btn {
  width: 2.625rem;
  height: 2.625rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 9999px;
  color: var(--primary-color);
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.mobile-preview-btn:hover {
  background: #eff6ff;
  border-color: #bfdbfe;
  color: var(--primary-hover);
  transform: translateY(-1px);
}

.mobile-preview-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.back-btn:hover {
  background: #f1f5f9;
  color: var(--text-main);
  border-color: #cbd5e1;
  transform: translateX(-2px);
}

/* Hero Banner */
.hero-banner {
  background: var(--gradient-hero);
  color: #ffffff;
  padding: 4.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.825rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  color: #93c5fd;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-banner h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-banner p {
  font-size: 1.15rem;
  color: #94a3b8;
  max-width: 600px;
  margin: 0 auto;
  font-weight: 400;
}

/* Content Area */
.container {
  max-width: 1200px;
  margin: -2.5rem auto 4rem;
  padding: 0 1.5rem;
  position: relative;
  z-index: 10;
}

/* Info Card Overview */
.course-map-nav-panel {
  margin-bottom: 2.25rem;
}

.course-map-nav-panel .course-map-top-tabs {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 999px;
  gap: 0.45rem;
  justify-content: center;
  margin: 0 auto 1rem;
  padding: 0.35rem;
  width: fit-content;
  max-width: 100%;
}

.course-map-nav-panel .tab-btn {
  border-color: transparent;
  min-width: 4.5rem;
  padding: 0.62rem 1.2rem;
}

.course-map-nav-panel .tab-label {
  display: block;
  line-height: 1.35;
}

.course-map-nav-panel .course-map-jump-nav {
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  display: none;
  margin: 0;
  padding: 0;
}

.course-map-nav-panel .course-map-jump-nav.active {
  display: grid;
}

.course-map-nav-panel .target-groups-tab-strip {
  margin: 0 0 1rem;
}

.course-map-jump-nav {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(190px, 100%), 1fr));
  margin-bottom: 2.25rem;
  padding: 1.25rem;
}

.course-map-jump-btn {
  align-items: center;
  background: #ffffff;
  border: 1.5px solid var(--jump-accent, #dbe6f3);
  border-radius: 14px;
  color: #0f172a;
  display: flex;
  gap: 0.75rem;
  font-size: 1.2rem;
  font-weight: 800;
  justify-content: center;
  letter-spacing: 0;
  line-height: 1.25;
  min-height: 4.5rem;
  overflow-wrap: anywhere;
  padding: 0.9rem 1.1rem;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.course-map-jump-btn.mandated { --jump-accent: var(--color-mandated); }
.course-map-jump-btn.school { --jump-accent: var(--color-school); }
.course-map-jump-btn.elective { --jump-accent: var(--color-elective); }
.course-map-jump-btn.deepening { --jump-accent: var(--color-deepening); }
.course-map-jump-btn.advanced-free { --jump-accent: var(--color-advanced-free); }
.course-map-jump-btn.remedial { --jump-accent: var(--color-remedial); }
.course-map-jump-btn.experimental { --jump-accent: var(--color-experimental); }

.course-map-jump-btn:hover {
  background: #f8fafc;
  border-color: var(--jump-accent, #bfdbfe);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.course-map-jump-btn:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.24);
  outline-offset: 3px;
}

.course-map-jump-btn span {
  max-width: 100%;
}

.course-map-jump-btn .stat-icon {
  color: var(--jump-accent, currentColor);
  height: 2.75rem;
  width: 2.75rem;
}

.course-map-jump-btn .stat-icon svg {
  height: 1.45rem;
  width: 1.45rem;
}

@media (max-width: 768px) {
  .course-map-jump-nav {
    gap: 0.5rem;
    grid-template-columns: repeat(auto-fit, minmax(min(112px, 100%), 1fr));
    padding: 0.75rem;
  }

  .course-map-jump-btn {
    border-radius: 10px;
    font-size: 0.95rem;
    gap: 0.45rem;
    min-height: 3rem;
    padding: 0.55rem 0.6rem;
  }

  .course-map-jump-btn .stat-icon {
    border-radius: 8px;
    height: 1.75rem;
    width: 1.75rem;
  }

  .course-map-jump-btn .stat-icon svg {
    height: 1rem;
    width: 1rem;
  }
}

.dashboard-meta {
  background: #ffffff;
  border-radius: 20px;
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(226, 232, 240, 0.8);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 1100px) {
  .dashboard-meta.four-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.meta-stat {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-right: 1.5rem;
  border-right: 1px solid #e2e8f0;
}

.meta-stat.stat-link {
  color: inherit;
  text-decoration: none;
  border-radius: 14px;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.meta-stat.stat-link:hover {
  background: #f8fafc;
  transform: translateY(-1px);
}

.meta-stat.stat-link:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.24);
  outline-offset: 4px;
}

.meta-stat:last-child {
  border-right: none;
  padding-right: 0;
}

@media (max-width: 768px) {
  .meta-stat {
    border-right: none;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 1rem;
    padding-right: 0;
  }
  .meta-stat:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
}

.stat-icon {
  width: 3rem;
  height: 3rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon.mandated { background: #eff6ff; color: var(--color-mandated); }
.stat-icon.school { background: #fffbeb; color: var(--color-school); }
.stat-icon.elective { background: #ecfdf5; color: var(--color-elective); }
.stat-icon.deepening { background: #fefce8; color: var(--color-deepening); }
.stat-icon.advanced-free { background: #fff7ed; color: var(--color-advanced-free); }
.stat-icon.remedial { background: #fff1f2; color: var(--color-remedial); }
.stat-icon.experimental { background: #f5f3ff; color: var(--color-experimental); }

.stat-details h4 {
  font-size: 0.825rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-details .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
}

.course-map-intro-box {
  background: #ffffff;
  border: 1px solid rgba(226, 232, 240, 0.95);
  border-radius: 18px;
  box-shadow: var(--shadow-md);
  color: var(--text-main);
  margin: -0.75rem 0 2.25rem;
  padding: 1.5rem 1.75rem;
}

.course-map-intro-box h2 {
  color: #0f172a;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 0.75rem;
}

.course-map-intro-box p {
  color: var(--text-muted);
  font-size: 1rem;
  margin: 0;
}

.course-map-intro-box p + p {
  margin-top: 0.85rem;
}

/* Categories Portal Panels */
.panel-card {
  background: #ffffff;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(226, 232, 240, 0.8);
  margin-bottom: 2.5rem;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.panel-card[id],
.tab-container[id] {
  scroll-margin-top: 96px;
}

.section-anchor {
  display: block;
  height: 128px;
  margin-top: -128px;
  pointer-events: none;
  visibility: hidden;
}

.panel-card:hover {
  box-shadow: var(--shadow-hover);
}

.panel-header {
  padding: 2rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #ffffff;
  position: relative;
}

.panel-header.mandated { background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%); }
.panel-header.school { background: linear-gradient(135deg, #d97706 0%, #b45309 100%); }
.panel-header.elective { background: linear-gradient(135deg, #059669 0%, #047857 100%); }
.panel-header.deepening { background: linear-gradient(135deg, #eab308 0%, #ca8a04 100%); }
.panel-header.advanced-free { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.panel-header.remedial { background: linear-gradient(135deg, #e11d48 0%, #be123c 100%); }
.panel-header.experimental { background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%); }
.panel-header.elective-summary { gap: 1.5rem; }

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-left svg {
  width: 2.25rem;
  height: 2.25rem;
}

.header-left h2 {
  font-size: 1.5rem;
  font-weight: 800;
}

.header-right .badge {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.825rem;
  font-weight: 600;
  color: #ffffff;
}

.header-right .credit-summary {
  min-width: 9rem;
  padding: 0.75rem 1.2rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: #047857;
  text-align: right;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

.header-right .credit-summary .credit-num {
  display: block;
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1;
  font-family: 'Outfit', sans-serif;
}

.header-right .credit-summary .credit-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.85rem;
  font-weight: 800;
  color: #334155;
}

@media (max-width: 768px) {
  .panel-header.elective-summary {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel-header.elective-summary .header-right {
    width: 100%;
  }

  .panel-header.elective-summary .credit-summary {
    width: 100%;
    min-width: 0;
    text-align: left;
  }
}

.panel-body {
  padding: 2.5rem;
}

/* Course Section Groupings */
.group-section {
  margin-bottom: 2rem;
}

.group-section:last-child {
  margin-bottom: 0;
}

.group-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px dashed #cbd5e1;
  padding-bottom: 0.5rem;
}

.group-title span {
  background: #f1f5f9;
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  font-weight: 600;
}

/* Course Grid Layout */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

/* Course Columns Layout */
.course-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.course-column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Premium Course Card */
.course-card {
  background: #f8fafc;
  border: 1px solid #dbe3ef;
  border-radius: 18px;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
  justify-content: space-between;
  min-height: 168px;
  padding: 1.5rem 1.75rem;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.course-card:hover {
  background: #ffffff;
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.course-meta {
  align-items: flex-start;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  min-height: 2.35rem;
}

.course-name {
  color: var(--text-main);
  flex: 1 1 auto;
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.35;
  min-width: 0;
  overflow-wrap: anywhere;
}

.course-type-badge {
  border-radius: 6px;
  flex: 0 0 auto;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.15;
  max-width: 9rem;
  overflow-wrap: anywhere;
  padding: 0.35rem 0.65rem;
  text-align: center;
  text-transform: none;
}

.course-type-badge.is-stacked-domain-label {
  font-size: 0.68rem;
  font-weight: 700;
}

.course-type-badge.is-stacked-domain-label .course-type-badge-primary {
  opacity: 0.72;
}

.course-type-badge.is-stacked-domain-label[data-mobile-label]::after {
  content: attr(data-mobile-label);
  display: block;
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1.1;
  margin-top: 0.18rem;
  opacity: 1;
  overflow-wrap: anywhere;
}

/* Badge Types */
.course-card.mandated-card:hover { border-color: var(--color-mandated); }
.course-card.school-card:hover { border-color: var(--color-school); }
.course-card.elective-card:hover { border-color: var(--color-elective); }
.course-card.deepening-card:hover { border-color: var(--color-deepening); }
.course-card.experimental-card:hover { border-color: var(--color-experimental); }

.badge-double { background: #eff6ff; color: #1e40af; }
.badge-single { background: #faf5ff; color: #6b21a8; }
.course-type-badge.domain-language { background: #eff6ff; color: #2563eb; }
.course-type-badge.domain-math { background: #ecfeff; color: #0e7490; }
.course-type-badge.domain-social { background: #fff7ed; color: #c2410c; }
.course-type-badge.domain-natural { background: #ecfdf5; color: #047857; }
.course-type-badge.domain-art { background: #f5f3ff; color: #7c3aed; }
.course-type-badge.domain-tech { background: #dffbf1; color: #00926f; }
.course-type-badge.domain-comprehensive { background: #fff7ed; color: #ea580c; }
.course-type-badge.domain-health { background: #fef2f2; color: #dc2626; }
.course-type-badge.domain-cross { background: #eef2ff; color: #4f46e5; }
.course-type-badge.domain-default { background: #f1f5f9; color: #475569; }
.course-type-badge.elective-label { background: #f1f5f9; color: #475569; }
.course-type-badge.elective-language { background: #eff6ff; color: #2563eb; }
.course-type-badge.elective-stem { background: #ecfdf5; color: #047857; }
.course-type-badge.elective-social { background: #fff7ed; color: #c2410c; }
.course-type-badge.elective-creative { background: #f5f3ff; color: #7c3aed; }
.course-type-badge.elective-health { background: #fef2f2; color: #dc2626; }
.course-type-badge.elective-semester {
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  color: #475569;
}
.course-type-badge.elective-default { background: #f1f5f9; color: #475569; }

.course-bottom {
  align-items: flex-end;
  border-top: 1px dashed #dbe3ef;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  margin-top: auto;
  min-height: 3.35rem;
  padding-top: 1.05rem;
}

.course-card-note {
  color: #003cff;
  flex: 1 1 auto;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.45;
  margin: 0 !important;
  min-width: 0;
  overflow-wrap: anywhere;
}

.course-card-note:empty::before {
  content: "\00a0";
}

.credit-count {
  align-items: baseline;
  display: flex;
  flex: 0 0 auto;
  gap: 0.15rem;
  justify-content: flex-end;
  min-width: 4.7rem;
}

.credit-count .num {
  color: var(--text-main);
  font-family: 'Outfit', sans-serif;
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1;
}

.credit-count .unit {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.sem-distribution {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background: #f1f5f9;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
}

/* PBL / Elective Large Cards */
.large-course-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .large-course-layout {
    grid-template-columns: 2fr 1fr;
  }
}

.large-course-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
}

.large-course-info h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
}

.large-course-info p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.large-course-stat {
  background: #f8fafc;
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.large-course-stat .big-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1;
  font-family: 'Outfit', sans-serif;
}

/* Explanation Notes Alert */
.explanation-box {
  background: #fffbeb;
  border: 1px dashed #f59e0b;
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 2.5rem;
}

.explanation-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #b45309;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.explanation-title svg {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
}

.explanation-list {
  list-style-type: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.explanation-list li {
  position: relative;
  padding-left: 1.75rem;
  font-size: 0.95rem;
  color: #78350f;
}

.explanation-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: #d97706;
  font-weight: 700;
}

/* Custom Footer */
footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 4rem 2rem;
  border-top: 1px solid #1e293b;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-left h3 {
  color: #ffffff;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.footer-left p {
  font-size: 0.875rem;
}

.footer-right {
  display: flex;
  gap: 1.5rem;
}

.footer-link {
  color: #64748b;
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #ffffff;
}

.footer-copyright {
  border-top: 1px solid #1e293b;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.775rem;
  color: #475569;
  margin-top: 2rem;
}

/* Group Elective Cards */
.group-elective-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.group-elective-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.group-elective-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  border-left: 4px solid var(--color-elective);
  padding-left: 0.75rem;
}

.group-elective-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.elective-tag {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  padding: 0.4rem 0.85rem;
  border-radius: 8px;
  font-size: 0.875rem;
  color: var(--text-main);
  font-weight: 500;
  transition: all 0.2s ease;
}

.elective-tag:hover {
  background: #ecfdf5;
  border-color: #34d399;
  color: #065f46;
  transform: translateY(-2px);
}

.elective-tag .tag-note {
  font-size: 0.7rem;
  color: #ef4444;
  margin-left: 0.25rem;
}

.linked-elective-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.linked-elective-card {
  color: inherit;
  text-decoration: none;
}

.linked-elective-card.is-placeholder {
  cursor: default;
}

.linked-elective-card.is-placeholder:hover {
  background: #f8fafc;
  border-color: #e2e8f0;
  box-shadow: none;
  transform: none;
}

.linked-elective-card .course-meta {
  gap: 0.75rem;
}

.linked-elective-card .course-labels {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem;
}

.linked-elective-card .course-type-badge,
.linked-elective-card .course-note {
  white-space: nowrap;
}

.linked-elective-card .course-note {
  background: #fff1f2;
  border-radius: 4px;
  color: #e11d48;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
}

.linked-elective-card .course-bottom {
  align-items: flex-end;
  gap: 1rem;
}

.linked-elective-card .course-bottom p {
  color: #003cff;
  flex: 1 1 calc(100% - 6rem);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.45;
  margin: 0 !important;
  max-width: calc(100% - 6rem);
}

.linked-elective-card .credit-count {
  flex: 0 0 5rem;
  justify-content: center;
  margin-left: auto;
  min-width: 5rem;
}

.linked-elective-card .sem-distribution {
  display: none;
}

.linked-elective-card .tone-language { background: rgba(59, 130, 246, 0.08); color: #2563eb; }
.linked-elective-card .tone-humanities { background: rgba(139, 92, 246, 0.08); color: #7c3aed; }
.linked-elective-card .tone-arts { background: rgba(217, 70, 239, 0.08); color: #a21caf; }
.linked-elective-card .tone-technology { background: rgba(16, 185, 129, 0.08); color: #059669; }
.linked-elective-card .tone-health { background: rgba(239, 68, 68, 0.08); color: #dc2626; }
.linked-elective-card .tone-social { background: rgba(245, 158, 11, 0.1); color: #b45309; }
.linked-elective-card .tone-science { background: rgba(20, 184, 166, 0.1); color: #0f766e; }
.linked-elective-card .tone-cross { background: rgba(99, 102, 241, 0.09); color: #4f46e5; }
.linked-elective-card .tone-default { background: #f1f5f9; color: #475569; }

/* Tabs System */
.tab-container {
  margin-bottom: 2.5rem;
}

.tab-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  justify-content: center;
}

.tab-btn {
  background: #f1f5f9;
  border: 1px solid #cbd5e1;
  color: var(--text-muted);
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

.tab-btn:hover {
  background: #e2e8f0;
  color: var(--text-main);
}

.tab-btn.active {
  background: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.tab-panel {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* University Groups Target */
.target-groups-panel {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 16px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}
.target-groups-panel h3 {
  color: #1e40af;
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.target-groups-panel .groups-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.target-groups-panel .group-badge {
  background: #ffffff;
  border: 1px solid #93c5fd;
  color: #1e3a8a;
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
}

.target-groups-tab-strip {
  margin: -0.5rem 0 1.5rem;
}

.target-groups-tab-panel {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin: 0;
  padding: 0.75rem 1rem;
  border-radius: 14px;
  overflow: hidden;
}

.target-groups-tab-panel.active {
  display: flex;
}

.target-groups-tab-panel h3,
.target-groups-tab-panel h3[style] {
  flex: 0 0 auto;
  margin: 0 !important;
  font-size: 0.95rem !important;
  line-height: 1.3;
  white-space: nowrap;
}

.target-groups-tab-panel .groups-list,
.target-groups-tab-panel .groups-list[style] {
  flex: 0 1 auto;
  display: flex !important;
  flex-wrap: wrap !important;
  align-items: center;
  justify-content: center;
  gap: 0.45rem !important;
  min-width: 0;
  overflow-x: visible;
  padding-bottom: 0.1rem;
}

.target-groups-tab-panel .group-badge,
.target-groups-tab-panel .group-badge[style] {
  flex: 0 0 auto;
  white-space: nowrap;
  padding: 0.22rem 0.65rem !important;
  font-size: 0.78rem !important;
}

body.course-mobile-prototype .target-groups-tab-strip {
  display: none;
}

@media (max-width: 720px) {
  .target-groups-tab-strip {
    display: none;
  }
}

/* Chips Group and Pill Buttons */
.chips-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.chip-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1.15rem;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 9999px;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
}

.chip-btn:hover {
  background: var(--primary-color);
  color: #ffffff;
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Course Guide Expandable Panel */
.course-guide-panel {
  background: #ffffff;
  border: 1px solid #bfdbfe;
  border-left: 5px solid var(--primary-color);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
  padding: 1.5rem;
}

.course-guide-title {
  align-items: center;
  color: #1e3a8a;
  display: flex;
  font-size: 1.15rem;
  font-weight: 800;
  gap: 0.625rem;
  margin-bottom: 0.65rem;
}

.course-guide-title svg {
  color: var(--primary-color);
  flex: 0 0 auto;
  height: 22px;
  width: 22px;
}

.course-guide-lead,
.course-guide-expanded p {
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0;
  text-align: justify;
}

.course-guide-details {
  margin-top: 1rem;
}

.course-guide-details summary {
  align-items: center;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  color: #1d4ed8;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  font-weight: 800;
  gap: 0.5rem 1rem;
  justify-content: space-between;
  list-style: none;
  padding: 0.85rem 1rem;
}

.course-guide-details summary::-webkit-details-marker {
  display: none;
}

.course-guide-details summary::after {
  content: "+";
  align-items: center;
  background: #ffffff;
  border: 1px solid #93c5fd;
  border-radius: 999px;
  color: #1d4ed8;
  display: inline-flex;
  flex: 0 0 auto;
  font-size: 1.1rem;
  height: 1.6rem;
  justify-content: center;
  width: 1.6rem;
}

.course-guide-details[open] summary::after {
  content: "-";
}

.course-guide-details .summary-note {
  color: var(--text-muted);
  flex: 1 1 20rem;
  font-size: 0.8rem;
  font-weight: 700;
}

.course-guide-expanded {
  display: grid;
  gap: 1.5rem;
  padding-top: 1.5rem;
}

.guide-section {
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

.guide-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.guide-section h3 {
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 800;
  margin: 0 0 0.75rem;
}

.guide-group-grid,
.math-guide-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 1rem 0;
}

.math-guide-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.guide-group-card,
.math-guide-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 1rem;
}

.guide-group-card h4,
.math-guide-card h4 {
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 800;
  margin: 0 0 0.4rem;
}

.guide-group-card p,
.math-guide-card p,
.math-guide-points {
  color: var(--text-light);
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0;
  text-align: left;
}

.math-guide-points {
  display: grid;
  gap: 0.55rem;
  list-style: none;
}

.math-guide-points li {
  margin: 0;
}

.math-guide-points strong {
  color: var(--text-main);
  font-weight: 800;
}

.math-guide-card.math-a-card {
  background: #eff6ff;
  border-color: #bfdbfe;
}

.math-guide-card.math-a-card h4 {
  color: #1d4ed8;
}

.math-guide-card.math-b-card {
  background: #f7fee7;
  border-color: #bef264;
}

.math-guide-card.math-b-card h4 {
  color: #3f6212;
}

.course-guide-figure {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  margin: 1rem 0 0;
  overflow: hidden;
}

.course-guide-figure img,
.course-guide-figure svg {
  display: block;
  height: auto;
  width: 100%;
}

.math-relation-svg {
  background: #ffffff;
}

.math-relation-label {
  fill: #111827;
  font-family: 'Noto Sans TC', sans-serif;
  font-size: 34px;
  font-weight: 500;
}

.course-guide-figure figcaption {
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.5;
  margin: 0;
  padding: 0.75rem 1rem;
}

@media (max-width: 900px) {
  .guide-group-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .course-guide-panel {
    padding: 1.1rem;
  }

  .course-guide-details summary {
    align-items: flex-start;
  }

  .course-guide-details .summary-note {
    flex-basis: 100%;
  }

  .guide-group-grid,
  .math-guide-grid {
    grid-template-columns: 1fr;
  }
}

/* Course card highlights */
.course-card-highlight {
  border: 2px solid var(--primary-color) !important;
  box-shadow: 0 0 15px rgba(59, 130, 246, 0.15) !important;
  background: linear-gradient(to bottom, #ffffff, #eff6ff) !important;
  position: relative;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

.course-card-highlight:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.25) !important;
}

.course-card-highlight::before {
  content: "🎯 本班群建議必修";
  position: absolute;
  top: 0;
  right: 0;
  background: var(--primary-color);
  color: white;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 4px 10px;
  border-bottom-left-radius: 8px;
}

.course-card-highlight-pink {
  border: 2px solid #db2777 !important;
  box-shadow: 0 0 15px rgba(219, 39, 119, 0.15) !important;
  background: linear-gradient(to bottom, #ffffff, #fdf2f8) !important;
}

.course-card-highlight-pink:hover {
  box-shadow: 0 10px 25px rgba(219, 39, 119, 0.25) !important;
}

.course-card-highlight-pink::before {
  content: "🎯 本班群建議必修";
  background: #db2777;
}

/* Music and Specialized Class Themes */
.hero-banner.theme-purple {
  background: linear-gradient(135deg, #4c1d95 0%, #1e1b4b 100%);
}
.hero-banner.theme-purple .hero-tag {
  color: #c4b5fd;
  border-color: rgba(196, 181, 253, 0.3);
  background: rgba(255, 255, 255, 0.08);
}
.large-course-layout.theme-elective-bg {
  margin-top: 1.5rem;
  border: 1px solid rgba(16, 185, 129, 0.2);
  background: #f0fdf4;
}
.large-course-layout.theme-elective-bg h3 {
  color: #047857;
}
.large-course-layout.theme-elective-bg p {
  color: #065f46;
}