/* BSD56 Competition Training Site - Custom Styles */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@300;400;500;700&display=swap');

:root {
  --primary: #1a3a6c;
  --primary-light: #2456a4;
  --accent: #e67e22;
  --accent-light: #f39c12;
  --success: #27ae60;
  --danger: #e74c3c;
  --warning: #f39c12;
  --info: #2980b9;
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #2c3e50;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --module-db: #8e44ad;
  --module-sw: #2980b9;
  --module-app: #27ae60;
  --module-all: #e67e22;
}

* { box-sizing: border-box; }

body {
  font-family: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  font-size: 14px;
  line-height: 1.6;
}

/* ---- Navbar ---- */
.site-navbar {
  background: var(--primary);
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  height: 60px;
  gap: 1rem;
}
.site-navbar .brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}
.site-navbar .brand .badge-num {
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 0.85rem;
}
.site-navbar .brand .brand-icon {
  flex-shrink: 0;
  filter: drop-shadow(0 1px 3px rgba(0,0,0,0.4));
}
.site-navbar .brand .brand-text {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1;
}
.site-navbar .brand .brand-bsd {
  color: #ffffff;
}
.site-navbar .brand .brand-56 {
  color: var(--accent);
}
.site-navbar .brand .brand-sub {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.65);
  font-weight: 400;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
.nav-links a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.nav-spacer { flex: 1; }
.progress-badge {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.8rem;
  white-space: nowrap;
}

/* ---- Sections ---- */
.section {
  display: none;
  padding: 2rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  animation: fadeIn 0.3s ease;
}
.section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-subtitle {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

/* ---- Hero ---- */
#section-home {
  display: block;
  padding: 0;
  max-width: 100%;
}
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #1a6696 100%);
  color: #fff;
  padding: 3rem 1.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 120%;
  height: 200%;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  position: relative;
}
.hero-subtitle {
  font-size: 1.1rem;
  opacity: 0.85;
  margin-bottom: 1.5rem;
  position: relative;
}
.hero-badges {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  position: relative;
  margin-bottom: 2rem;
}
.hero-badge {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 20px;
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  backdrop-filter: blur(5px);
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}
.stat-card {
  background: rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 1rem;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.2);
}
.stat-num {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}
.stat-label {
  font-size: 0.8rem;
  opacity: 0.75;
  margin-top: 0.25rem;
}

.home-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ---- Cards ---- */
.card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  overflow: hidden;
  border: 1px solid var(--border);
}
.card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: #fafbfc;
}
.card-body { padding: 1.25rem; }

/* ---- Grid Layouts ---- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.25rem; }
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ---- Module Badges ---- */
.badge-module {
  display: inline-block;
  border-radius: 20px;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
}
.badge-db { background: var(--module-db); }
.badge-sw { background: var(--module-sw); }
.badge-app { background: var(--module-app); }
.badge-all { background: var(--module-all); }

/* ---- Difficulty Stars ---- */
.difficulty {
  display: inline-flex;
  gap: 2px;
  font-size: 0.8rem;
}
.star-filled { color: var(--accent); }
.star-empty { color: #dee2e6; }

/* ---- Week Cards (Curriculum) ---- */
.week-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.week-card {
  background: var(--card-bg);
  border-radius: 10px;
  border: 2px solid var(--border);
  padding: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.week-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}
.week-card.mod-db::before { background: var(--module-db); }
.week-card.mod-sw::before { background: var(--module-sw); }
.week-card.mod-app::before { background: var(--module-app); }
.week-card.mod-all::before { background: var(--module-all); }
.week-card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  transform: translateY(-2px);
}
.week-card.completed {
  background: #f0fdf4;
  border-color: var(--success);
}
.week-num {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.week-title { font-weight: 700; font-size: 0.95rem; margin: 0.25rem 0; }
.week-desc { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.5rem; }
.week-meta { display: flex; align-items: center; justify-content: space-between; }
.check-icon {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 22px;
  height: 22px;
  background: var(--success);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.7rem;
}
.week-card.completed .check-icon { display: flex; }

/* ---- Week Detail Modal ---- */
.week-detail {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 2000;
  padding: 1rem;
  overflow-y: auto;
  animation: fadeIn 0.2s ease;
}
.week-detail.open { display: flex; align-items: flex-start; justify-content: center; }
.week-detail-inner {
  background: var(--card-bg);
  border-radius: 16px;
  width: 100%;
  max-width: 860px;
  margin: auto;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.week-detail-header {
  padding: 1.5rem;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.week-detail-header.mod-db { background: var(--module-db); }
.week-detail-header.mod-sw { background: var(--module-sw); }
.week-detail-header.mod-app { background: var(--module-app); }
.week-detail-header.mod-all { background: var(--module-all); }
.week-detail-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 0.25rem; }
.week-detail-sub { opacity: 0.85; font-size: 0.9rem; }
.btn-close-detail {
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  border-radius: 8px;
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  font-size: 1rem;
  flex-shrink: 0;
}
.btn-close-detail:hover { background: rgba(255,255,255,0.35); }
.week-detail-body { padding: 1.5rem; }
.detail-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.detail-tab {
  padding: 0.4rem 0.9rem;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: inherit;
  transition: all 0.2s;
  border-radius: 6px 6px 0 0;
}
.detail-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}
.detail-tab:hover:not(.active) {
  color: var(--text);
  background: var(--bg);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* ---- Content Blocks ---- */
.objectives-list { list-style: none; padding: 0; margin: 0; }
.objectives-list li {
  padding: 0.4rem 0;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
}
.objectives-list li:last-child { border-bottom: none; }
.obj-icon { color: var(--success); flex-shrink: 0; }

.topics-list { list-style: none; padding: 0; margin: 0; }
.topics-list li {
  padding: 0.5rem 0.75rem;
  border-left: 3px solid var(--primary-light);
  margin-bottom: 0.5rem;
  background: var(--bg);
  border-radius: 0 6px 6px 0;
  font-size: 0.875rem;
}

/* ---- Exercises ---- */
.exercise-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 1rem;
  overflow: hidden;
}
.exercise-header {
  padding: 0.75rem 1rem;
  background: #f8f9fa;
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}
.exercise-header:hover { background: #eef0f2; }
.exercise-body { padding: 1rem; display: none; }
.exercise-body.open { display: block; }
.exercise-q {
  background: #fffbf0;
  border-left: 4px solid var(--accent);
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.875rem;
}
.exercise-q strong { display: block; color: var(--accent); margin-bottom: 0.25rem; }
.answer-toggle {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
}
.btn-show-answer {
  background: #e8f4f8;
  border: 1px solid var(--info);
  color: var(--info);
  border-radius: 6px;
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-family: inherit;
  transition: all 0.2s;
}
.btn-show-answer:hover { background: var(--info); color: #fff; }
.answer-content {
  display: none;
  margin-top: 0.75rem;
  background: #f0fdf4;
  border-left: 4px solid var(--success);
  padding: 0.75rem 1rem;
  border-radius: 0 6px 6px 0;
  font-size: 0.875rem;
}
.answer-content.show { display: block; }

/* ---- Code Blocks ---- */
.code-block {
  background: #1e2735;
  border-radius: 10px;
  overflow: hidden;
  margin: 0.75rem 0;
  font-size: 0.8rem;
}
.code-header {
  background: #2d3748;
  padding: 0.4rem 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #a0aec0;
  font-size: 0.75rem;
}
.code-header .lang { color: #68d391; font-weight: 600; }
.btn-copy {
  background: rgba(255,255,255,0.1);
  border: none;
  color: #a0aec0;
  border-radius: 4px;
  padding: 2px 8px;
  cursor: pointer;
  font-size: 0.7rem;
  font-family: inherit;
  transition: all 0.2s;
}
.btn-copy:hover { background: rgba(255,255,255,0.2); color: #fff; }
.code-block pre {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  color: #e2e8f0;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  line-height: 1.6;
}
.code-block pre .kw { color: #63b3ed; }
.code-block pre .str { color: #68d391; }
.code-block pre .cm { color: #718096; font-style: italic; }
.code-block pre .num { color: #fc8181; }
.code-block pre .fn { color: #f6e05e; }
.code-block pre .tp { color: #b794f4; }

/* ---- Test Data Tables ---- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin: 0.5rem 0;
}
.data-table th {
  background: var(--primary);
  color: #fff;
  padding: 0.5rem 0.75rem;
  text-align: left;
  font-weight: 600;
}
.data-table td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
.data-table tr:nth-child(even) td { background: var(--bg); }
.data-table tr:hover td { background: #e8f4f8; }

/* ---- Scoring Analysis ---- */
.scoring-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.score-module-card {
  border-radius: 12px;
  padding: 1.25rem;
  color: #fff;
  text-align: center;
}
.score-module-card.db { background: linear-gradient(135deg, var(--module-db), #9b59b6); }
.score-module-card.sw { background: linear-gradient(135deg, var(--module-sw), #3498db); }
.score-module-card.app { background: linear-gradient(135deg, var(--module-app), #2ecc71); }
.score-pct { font-size: 2.5rem; font-weight: 700; line-height: 1; }
.score-name { font-size: 0.9rem; opacity: 0.9; margin-top: 0.25rem; }
.score-tip { font-size: 0.75rem; opacity: 0.75; margin-top: 0.5rem; }

.strategy-box {
  background: #fff8e1;
  border: 1px solid var(--warning);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1rem 0;
}
.strategy-box h4 { color: #795548; margin: 0 0 0.5rem; font-size: 0.95rem; }
.strategy-box ul { margin: 0; padding-left: 1.25rem; font-size: 0.875rem; }
.strategy-box li { margin-bottom: 0.3rem; }

/* ---- Progress Section ---- */
.progress-overview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.prog-stat {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 1rem;
  text-align: center;
  border: 1px solid var(--border);
}
.prog-stat-num { font-size: 1.8rem; font-weight: 700; color: var(--primary); }
.prog-stat-label { font-size: 0.75rem; color: var(--text-muted); }
.week-progress-bar {
  background: var(--bg);
  border-radius: 6px;
  height: 8px;
  margin-bottom: 1rem;
  overflow: hidden;
}
.week-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 6px;
  transition: width 0.5s ease;
}
.progress-week-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem;
  border-radius: 8px;
  margin-bottom: 0.4rem;
  cursor: pointer;
  transition: background 0.15s;
}
.progress-week-row:hover { background: var(--bg); }
.progress-week-row input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--success); }
.progress-week-label { flex: 1; font-size: 0.875rem; }
.progress-week-badge { font-size: 0.75rem; }

/* ---- Upload Section ---- */
.upload-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.upload-step {
  text-align: center;
  padding: 1.25rem;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border);
}
.step-num {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 auto 0.75rem;
}
.upload-step h4 { font-size: 0.95rem; margin: 0 0 0.4rem; }
.upload-step p { font-size: 0.8rem; color: var(--text-muted); margin: 0; }

.submit-form {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border);
}
.form-group { margin-bottom: 1rem; }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.4rem; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  transition: border-color 0.2s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(36,86,164,0.1);
}
.form-textarea { resize: vertical; min-height: 80px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: none;
  border-radius: 8px;
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }
.btn-success { background: var(--success); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-light); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 0.3rem 0.75rem; font-size: 0.8rem; }

/* ---- Info Alerts ---- */
.alert {
  border-radius: 8px;
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  display: flex;
  gap: 0.5rem;
  align-items: flex-start;
}
.alert-info { background: #e8f4fd; border-left: 4px solid var(--info); color: #1a5276; }
.alert-warning { background: #fef9e7; border-left: 4px solid var(--warning); color: #7d6608; }
.alert-success { background: #e9f7ef; border-left: 4px solid var(--success); color: #1e8449; }
.alert-danger { background: #fdedec; border-left: 4px solid var(--danger); color: #922b21; }

/* ---- Scoring Table ---- */
.score-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.score-table th {
  background: #f8f9fa;
  padding: 0.6rem 0.9rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.score-table td {
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--border);
}
.score-table tr:hover td { background: var(--bg); }
.difficulty-bar {
  display: flex;
  gap: 3px;
  align-items: center;
}
.diff-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.diff-dot.filled { background: var(--accent); }
.diff-dot.empty { background: var(--border); }

/* ---- Badges ---- */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-easy { background: #d5f5e3; color: #1e8449; }
.badge-medium { background: #fef9e7; color: #d4ac0d; }
.badge-hard { background: #fdebd0; color: #ba4a00; }
.badge-expert { background: #f9ebea; color: #922b21; }

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: #c0c0c0; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #888; }

/* ---- Teacher Info Card ---- */
.teacher-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: linear-gradient(135deg, #1a3a6c 0%, #2456a4 100%);
  color: #fff;
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.teacher-avatar { font-size: 2.5rem; line-height: 1; }
.teacher-info { flex: 1; min-width: 150px; }
.teacher-name { font-weight: 700; font-size: 1rem; }
.teacher-email {
  color: #90caf9;
  font-size: .875rem;
  text-decoration: none;
}
.teacher-email:hover { text-decoration: underline; }
.teacher-meeting {
  border-left: 2px solid rgba(255,255,255,.35);
  padding-left: 1.25rem;
  min-width: 200px;
}
.teacher-meeting-label { font-size: .75rem; opacity: .75; margin-bottom: .2rem; }
.teacher-meeting-time { font-weight: 700; font-size: 1.05rem; }
.teacher-meeting-sub { font-size: .8rem; opacity: .8; margin-top: .2rem; }
.teacher-admin-link {
  align-self: center;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.35);
  color: #fff;
  text-decoration: none;
  padding: .45rem .9rem;
  border-radius: 8px;
  font-size: .82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background .15s;
}
.teacher-admin-link:hover { background: rgba(255,255,255,.28); }

/* ---- Answer Released Badge (on week cards) ---- */
.answer-released-badge {
  display: inline-block;
  background: #fff3cd;
  color: #856404;
  border: 1px solid #ffc107;
  border-radius: 6px;
  font-size: .68rem;
  font-weight: 600;
  padding: .1rem .4rem;
  margin-left: .4rem;
  vertical-align: middle;
  white-space: nowrap;
}

/* ---- Exercises Toolbar ---- */
.exercises-toolbar {
  display: flex;
  gap: .5rem;
  margin-bottom: .75rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}

/* ---- Locked Answer ---- */
.answer-locked {
  display: flex;
  align-items: center;
  gap: .5rem;
  background: #f8f9fa;
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: .6rem .9rem;
  font-size: .82rem;
  color: var(--text-muted);
  margin-top: .5rem;
}

/* ---- Resource Links ---- */
.resource-link {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem .75rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  font-size: .875rem;
  transition: background .15s;
  border-bottom: 1px solid var(--border);
}
.resource-link:last-child { border-bottom: none; }
.resource-link:hover { background: var(--bg); color: var(--primary-light); }
.resource-name { flex: 1; }
.resource-arrow { color: var(--text-muted); font-size: .8rem; }

/* ---- Week Nav (prev/next in modal) ---- */
.week-nav {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-right: .5rem;
}
.week-nav .btn {
  background: rgba(255,255,255,.15);
  border-color: rgba(255,255,255,.4);
  color: #fff;
  font-size: .75rem;
  padding: .25rem .6rem;
}
.week-nav .btn:hover:not(:disabled) { background: rgba(255,255,255,.3); }
.week-nav .btn:disabled { opacity: .35; cursor: not-allowed; }

/* ---- Homework Answer Block ---- */
.hw-answer-wrapper {
  margin-top: 1.5rem;
  border: 2px solid var(--primary-light);
  border-radius: 10px;
  overflow: hidden;
}
.hw-answer-wrapper.locked {
  border-color: var(--border);
}
.hw-answer-wrapper.locked .hw-answer-header {
  background: #f8f9fa;
  color: var(--text-muted);
}
.hw-answer-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  padding: .65rem 1rem;
  font-weight: 700;
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
}
.hw-answer-body {
  padding: 1rem;
  background: #fff;
}
.hw-answer-summary {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: .875rem;
  background: #f0f4ff;
  border-left: 3px solid var(--primary-light);
  padding: .5rem .75rem;
  border-radius: 0 6px 6px 0;
}
.hw-answer-section {
  margin-bottom: 1.25rem;
}
.hw-answer-section:last-child { margin-bottom: 0; }
.hw-answer-title {
  font-weight: 700;
  font-size: .85rem;
  color: var(--primary);
  margin-bottom: .5rem;
  padding-bottom: .3rem;
  border-bottom: 1px solid var(--border);
}
.hw-answer-text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--text);
}
.hw-answer-body .mermaid {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  text-align: center;
}
.hw-answer-body .code-block {
  margin-bottom: 0;
}

/* ---- Print ---- */
@media print {
  .site-navbar, .week-detail { display: none !important; }
  .section { display: block !important; }
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .hero-title { font-size: 1.5rem; }
  .week-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 1.25rem 1rem; }
  .week-detail-inner { border-radius: 12px; }
}