/* ═══════════════════════════════════════════════════════════════
   DASE 7002 Global Logistics — Style Sheet
   ═══════════════════════════════════════════════════════════════ */

:root {
  --primary:        #2563EB;
  --primary-dark:   #1D4ED8;
  --primary-light:  #DBEAFE;
  --primary-pale:   #EFF6FF;
  --teal:           #0D9488;
  --teal-light:     #CCFBF1;
  --success:        #059669;
  --success-light:  #D1FAE5;
  --warning:        #D97706;
  --warning-light:  #FEF3C7;
  --danger:         #DC2626;
  --danger-light:   #FEE2E2;
  --info:           #0284C7;
  --info-light:     #E0F2FE;

  --bg:             #F8FAFC;
  --bg-card:        #FFFFFF;
  --border:         #E2E8F0;
  --border-light:   #F1F5F9;
  --text:           #1E293B;
  --text-muted:     #64748B;
  --text-light:     #94A3B8;

  --radius:         10px;
  --radius-sm:      6px;
  --shadow:         0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:      0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:      0 10px 15px rgba(0,0,0,.08), 0 4px 6px rgba(0,0,0,.05);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
               'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-dark); }

img { max-width: 100%; }

/* ── Layout ───────────────────────────────────────────────────── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.container-sm { max-width: 680px; margin: 0 auto; padding: 0 20px; }

/* ── Navbar ───────────────────────────────────────────────────── */
.navbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  letter-spacing: -.3px;
}

.navbar-brand .brand-badge {
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: .5px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.navbar-nav a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: all .2s;
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--primary);
  background: var(--primary-pale);
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Buttons ──────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover { text-decoration: none; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-dark); color: #fff; border-color: var(--primary-dark); }

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

.btn-secondary {
  background: var(--bg);
  color: var(--text-muted);
  border-color: var(--border);
}
.btn-secondary:hover { background: var(--border-light); color: var(--text); }

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}
.btn-danger:hover { background: #b91c1c; color: #fff; }

/* Hero button variants */
.btn-hero {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
  font-weight: 600;
}
.btn-hero:hover { background: rgba(255,255,255,.9); color: var(--primary-dark); border-color: #fff; }

.btn-hero-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.55);
  font-weight: 500;
}
.btn-hero-outline:hover { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.8); color: #fff; }

.btn-sm { padding: 5px 11px; font-size: 13px; }
.btn-lg { padding: 11px 24px; font-size: 15px; }
.btn-block { width: 100%; justify-content: center; }

/* ── Cards ────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
}

.card-body { padding: 20px; }
.card-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  border-radius: 0 0 var(--radius) var(--radius);
}

/* ── Quick-access / Link Cards ────────────────────────────────── */
.quick-card {
  text-decoration: none;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  transition: box-shadow .2s, border-color .2s;
}
.quick-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
  color: var(--text);
  text-decoration: none;
}

/* ── Flash Messages ───────────────────────────────────────────── */
.flash-wrap { padding: 12px 0 0; }

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid transparent;
}

.alert-success { background: var(--success-light); color: #065F46; border-color: #6EE7B7; }
.alert-danger  { background: var(--danger-light);  color: #991B1B; border-color: #FCA5A5; }
.alert-warning { background: var(--warning-light); color: #92400E; border-color: #FCD34D; }
.alert-info    { background: var(--info-light);    color: #075985; border-color: #7DD3FC; }

.alert-close {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  opacity: .6;
  font-size: 16px;
  padding: 0 2px;
}
.alert-close:hover { opacity: 1; }

/* ── Forms ────────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 9px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}

textarea.form-control { resize: vertical; min-height: 100px; }

.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 540px) { .form-row { grid-template-columns: 1fr; } }

/* ── Tables ───────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); }

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

th {
  background: var(--bg);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text-muted);
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg); }

/* ── Badges ───────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2px;
}

.badge-primary { background: var(--primary-light); color: var(--primary-dark); }
.badge-success { background: var(--success-light); color: #065F46; }
.badge-warning { background: var(--warning-light); color: #92400E; }
.badge-danger  { background: var(--danger-light);  color: #991B1B; }
.badge-teal    { background: var(--teal-light);    color: #0F766E; }
.badge-gray    { background: var(--border-light);  color: var(--text-muted); }

/* ── Page Header ──────────────────────────────────────────────── */
.page-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 28px 0 24px;
  margin-bottom: 28px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  letter-spacing: -.3px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-muted);
}

/* ── Hero Section ─────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, #1D4ED8 0%, #0D9488 100%);
  color: #fff;
  padding: 72px 0 60px;
  text-align: center;
}

.hero h1 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -.6px;
  margin-bottom: 16px;
  line-height: 1.2;
}

.hero p {
  font-size: 16px;
  opacity: .9;
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,.18);
}

.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 30px;
  font-weight: 800;
  display: block;
  letter-spacing: -.5px;
}
.hero-stat .lbl {
  font-size: 13px;
  opacity: .75;
  margin-top: 2px;
}

/* ── Module Cards Grid ────────────────────────────────────────── */
.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 28px;
}

.module-card {
  background: #fff;
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  transition: all .25s;
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--text);
}

.module-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-left-color: var(--primary);
  color: var(--text);
}

.module-num {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--primary);
  background: var(--primary-pale);
  padding: 3px 9px;
  border-radius: 20px;
  width: fit-content;
}

.module-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.module-desc {
  font-size: 13px;
  color: var(--text-muted);
  flex: 1;
  line-height: 1.6;
}

/* ── Module List (course/list.html) ──────────────────────────── */
.module-list-item {
  text-decoration: none;
  transition: box-shadow .2s, border-color .2s;
  display: block;
}
.module-list-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
  text-decoration: none;
}

/* ── Section Header ────────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 32px;
}
.section-header .section-sub { margin-bottom: 0; }

/* ── Course Content (Markdown-like) ──────────────────────────── */
.prose {
  color: var(--text);
  line-height: 1.75;
  font-size: 15px;
}

.prose h2 {
  font-size: 19px;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-light);
}

.prose h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 22px 0 8px;
  color: var(--text);
}

.prose p { margin-bottom: 14px; }

.prose ul, .prose ol {
  padding-left: 22px;
  margin-bottom: 14px;
}

.prose li { margin-bottom: 4px; }

.prose strong { font-weight: 700; color: var(--text); }

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

.prose th {
  background: var(--primary-pale);
  color: var(--primary-dark);
  font-size: 13px;
  border: 1px solid var(--primary-light);
  padding: 9px 13px;
  font-weight: 700;
}

.prose td {
  border: 1px solid var(--border);
  padding: 9px 13px;
  background: #fff;
}

.prose tr:nth-child(even) td { background: var(--bg); }

.prose code {
  background: var(--border-light);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'Consolas', 'Monaco', monospace;
}

/* ── Search ───────────────────────────────────────────────────── */
.search-box {
  display: flex;
  gap: 10px;
  align-items: center;
}

.search-input-wrap {
  position: relative;
  flex: 1;
}

.search-input-wrap .search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 16px;
  pointer-events: none;
}

.search-input-wrap input {
  padding-left: 38px;
}

.search-suggestions {
  position: absolute;
  top: calc(100% + 4px);
  left: 0; right: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  z-index: 200;
  overflow: hidden;
}

.suggestion-item {
  padding: 10px 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
  transition: background .15s;
}
.suggestion-item:hover { background: var(--primary-pale); }
.suggestion-item .s-term { font-weight: 600; color: var(--text); }
.suggestion-item .s-cn { font-size: 12px; color: var(--text-muted); }
.suggestion-item .s-cat { font-size: 11px; color: var(--primary); background: var(--primary-pale); padding: 2px 7px; border-radius: 10px; }

.concept-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  transition: box-shadow .2s;
}
.concept-card:hover { box-shadow: var(--shadow-md); }

.concept-term {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}
.concept-term-cn {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.concept-definition {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 10px;
}
.concept-example {
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg);
  border-left: 3px solid var(--primary-light);
  padding: 8px 12px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}

.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.cat-btn {
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-muted);
  transition: all .2s;
  text-decoration: none;
  display: inline-block;
}
.cat-btn:hover, .cat-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 14px; opacity: .5; }
.empty-state p { font-size: 15px; }

/* ── Profile ──────────────────────────────────────────────────── */
.avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.avatar-sm {
  width: 36px;
  height: 36px;
  font-size: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.profile-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.profile-info h2 { font-size: 20px; font-weight: 700; margin-bottom: 2px; }
.profile-info p { font-size: 13px; color: var(--text-muted); }

/* ── Pagination / Navigation ──────────────────────────────────── */
.module-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

/* ── Section Title ────────────────────────────────────────────── */
.section-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -.3px;
}
.section-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ── Auth Pages ───────────────────────────────────────────────── */
.auth-wrap {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: linear-gradient(135deg, var(--primary-pale) 0%, var(--teal-light) 100%);
}

.auth-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 36px;
  width: 100%;
  max-width: 420px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 28px;
}

.auth-logo .logo-badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 20px;
  letter-spacing: .5px;
  margin-bottom: 12px;
}

.auth-logo h2 { font-size: 20px; font-weight: 700; color: var(--text); }
.auth-logo p { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* ── Footer ───────────────────────────────────────────────────── */
footer {
  margin-top: auto;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
}

/* ── Utilities ────────────────────────────────────────────────── */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); font-size: 13px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }
.flex-1 { flex: 1; }
.w-100 { width: 100%; }

.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* ── Concept Ticker ───────────────────────────────────────────── */
.concept-ticker-wrap {
  margin-top: 28px;
  overflow: hidden;
  border-radius: 30px;
  background: rgba(255,255,255,0.12);
  padding: 10px 0;
}

.concept-ticker-track {
  display: flex;
  width: max-content;
  animation: concept-ticker 38s linear infinite;
}

.concept-ticker-set {
  display: flex;
  gap: 10px;
  padding-right: 10px;
}

.concept-pill {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  padding: 5px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  transition: background .2s;
}

a.concept-pill:hover {
  background: rgba(255,255,255,0.35);
  color: #fff;
}

@keyframes concept-ticker {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ── Markdown Content ─────────────────────────────────────────── */
.md-content {
  padding: 24px 28px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.md-h2 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  padding-bottom: 8px;
  margin: 28px 0 14px;
  border-bottom: 2px solid var(--primary-light);
}

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

.md-h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin: 18px 0 8px;
  text-transform: uppercase;
  letter-spacing: .4px;
  font-size: 13px;
  color: var(--text-muted);
}

.md-p {
  margin: 6px 0;
  line-height: 1.8;
}

.md-gap { height: 10px; }

.md-list {
  list-style: none;
  padding: 0;
  margin: 8px 0;
}

.md-list li {
  position: relative;
  padding-left: 18px;
  margin: 6px 0;
  line-height: 1.65;
  font-size: 14px;
}

.md-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 11px;
  top: 3px;
}

.md-code {
  background: var(--primary-pale);
  color: var(--primary-dark);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 13px;
}

.md-note {
  background: var(--warning-light);
  border-left: 4px solid var(--warning);
  padding: 10px 16px;
  border-radius: 0 8px 8px 0;
  margin: 14px 0;
  font-size: 14px;
  color: var(--text);
}

.md-table-wrap {
  overflow-x: auto;
  margin: 14px 0;
  border-radius: 10px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.md-table thead th {
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  font-weight: 600;
  text-align: left;
  font-size: 13px;
  letter-spacing: .2px;
}

.md-table thead th:first-child { border-radius: 0; }

.md-table tbody td {
  padding: 9px 16px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text);
  vertical-align: top;
}

.md-table tbody tr:last-child td { border-bottom: none; }

.md-table tbody tr:nth-child(even) td { background: var(--bg); }

.md-ch-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 13px;
}

/* ── Responsive ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero h1 { font-size: 26px; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .navbar-nav { display: none; }
  .modules-grid { grid-template-columns: 1fr; }
}

/* Static showcase additions */
.site-view[hidden], [hidden] { display: none !important; }
.showcase-nav { max-width: 1320px; gap: 16px; }
.showcase-nav .navbar-nav { gap: 0; }
.showcase-nav .navbar-nav a { padding: 6px 9px; }
.account-link { flex-shrink: 0; }
.page-body { padding-top: 12px; padding-bottom: 48px; }
.text-muted { color: var(--text-muted); }
.section-title { margin-bottom: 6px; }
.quick-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 38px; }
.quick-grid strong, .quick-grid small { display: block; }
.quick-grid small { color: var(--text-muted); font-size: 13px; margin-top: 3px; }
.quick-icon { font-size: 32px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 26px; align-items: start; }
.stack { display: grid; gap: 16px; }
.stack .card-body p:last-child { margin-bottom: 0; }
.module-detail summary { display: flex; align-items: center; gap: 12px; padding: 17px 20px; cursor: pointer; list-style: none; }
.module-detail { scroll-margin-top: 76px; }
.module-detail summary::-webkit-details-marker { display: none; }
.module-detail summary:focus-visible { outline: 3px solid var(--primary-light); }
.module-detail summary strong { font-size: 15px; }
.module-detail .card-body { border-top: 1px solid var(--border); }
.summary-arrow { margin-left: auto; color: var(--primary); transition: transform .2s; }
.module-detail[open] .summary-arrow { transform: rotate(180deg); }
.module-detail .prose ul { margin-bottom: 0; }
.search-panel { padding: 20px; margin-bottom: 16px; }
.category-select { width: 220px; flex: none; }
.result-count { color: var(--text-muted); font-size: 14px; margin: 0 0 14px; }
.concept-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 6px; }
.concept-top .badge { flex-shrink: 0; }
.concept-card[hidden] { display: none; }
.filter-panel { display: flex; gap: 16px; align-items: flex-end; flex-wrap: wrap; padding: 20px; margin-bottom: 20px; }
.filter-panel .form-group { margin: 0; flex: 1; min-width: 150px; }
.selection-card { margin-bottom: 22px; }
.selection-card strong { color: var(--text-muted); text-transform: uppercase; font-size: 12px; letter-spacing: .5px; }
.selection-card p { font-size: 14px; margin-top: 6px; }
.question-card { margin-bottom: 22px; }
.question-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.question-head > span:first-child { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.q-badge { background: var(--primary); color: #fff; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 20px; }
.difficulty { font-size: 12px; font-weight: 700; padding: 3px 9px; border-radius: 20px; }
.difficulty-easy { background: #dcfce7; color: #166534; }
.difficulty-medium { background: #fef3c7; color: #92400e; }
.question-text { background: var(--bg); border-left: 3px solid var(--primary); padding: 16px 18px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-bottom: 20px; white-space: pre-wrap; font-size: 14px; }
.asset-box { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; text-align: center; margin-bottom: 20px; }
.asset-box img { height: auto; }
.sample-feedback { margin-top: 16px; padding: 16px 18px; background: var(--primary-pale); border: 1px solid var(--primary-light); border-radius: var(--radius-sm); font-size: 14px; }
.sample-feedback p { margin-top: 8px; }
.sample-feedback p:last-child { margin-bottom: 0; }
.sample-group { padding: 14px 16px; border-bottom: 1px solid var(--border-light); display: grid; gap: 5px; }
.sample-group strong { font-size: 13px; line-height: 1.4; }
.sample-group small { color: var(--text-muted); }
.status-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.status-grid small, .status-grid strong { display: block; }
.status-grid small { color: var(--text-muted); font-size: 12px; text-transform: uppercase; font-weight: 700; }
.status-grid strong { margin-top: 3px; font-size: 14px; }
.status-grid .grade { font-size: 25px; color: var(--primary); }
.note-list { padding-left: 20px; font-size: 14px; color: var(--text-muted); }
.note-list li { margin-bottom: 10px; }
.group-heading { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; background: var(--primary-pale); padding: 14px 20px; border-bottom: 1px solid var(--border); }
.group-heading .text-muted { margin-left: auto; font-size: 13px; }
.group-pill { background: var(--primary); color: #fff; font-size: 12px; font-weight: 700; padding: 3px 12px; border-radius: 20px; }
.mark-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--border-light); }
.mark-row:last-child { border-bottom: 0; }
.mark-row label { display: flex; align-items: center; gap: 9px; margin: 0; font-size: 15px; }
.mark-row > span:first-child { display: flex; align-items: center; gap: 9px; }
.mark-row > span:last-child { white-space: nowrap; font-size: 13px; color: var(--text-muted); }
.mark-input { display: inline-block; width: 85px; text-align: center; }
#marking-form { display: grid; gap: 18px; }
#marking-form > button { justify-self: end; }
.preview-result { margin-top: 18px; }
.profile-card { display: flex; gap: 24px; align-items: center; padding: 28px; max-width: 720px; }
.profile-card h2 { font-size: 21px; }
.profile-card p { margin: 4px 0; }
.account-explain { max-width: 720px; margin-top: 20px; }
.account-explain p { margin-bottom: 16px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 1040px) {
  .showcase-nav { flex-wrap: wrap; height: auto; padding-top: 10px; padding-bottom: 10px; }
  .showcase-nav .navbar-nav { order: 3; width: 100%; display: flex; overflow-x: auto; padding-bottom: 2px; }
}
@media (max-width: 768px) {
  .content-grid { grid-template-columns: 1fr; }
  .quick-grid { grid-template-columns: 1fr; }
  .search-box { flex-wrap: wrap; }
  .search-input-wrap { flex-basis: 100%; }
  .category-select { flex: 1; width: auto; }
}
@media (max-width: 540px) {
  .showcase-nav .navbar-brand .brand-badge { display: none; }
  .account-link { font-size: 0; }
  .account-link .avatar-sm { font-size: 11px; }
  .module-detail summary { flex-wrap: wrap; }
  .status-grid { grid-template-columns: 1fr; }
  .mark-row { align-items: flex-start; flex-direction: column; }
}