:root {
  --bg: #f3f6fb;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --border: #d8e1ee;
  --primary: #1d4ed8;
  --accent: #0f766e;
  --shadow: 0 16px 40px rgba(15, 23, 42, 0.07);
  --radius: 18px;
  --neutral-bg: #f1f5f9;
  --neutral-text: #475569;
  --neutral-border: #cbd5e1;
  --success-bg: #f0fdf4;
  --success-text: #166534;
  --success-border: #86efac;
  --warn-bg: #fff7ed;
  --warn-text: #c2410c;
  --warn-border: #fdba74;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(29, 78, 216, 0.08), transparent 28%),
    radial-gradient(circle at top right, rgba(15, 118, 110, 0.07), transparent 24%),
    var(--bg);
}

body.theme-bw {
  --bg: #07111f;
  --panel: #0f1b34;
  --panel-2: #13203d;
  --text: #f8fafc;
  --muted: #cbd5e1;
  --border: #273756;
  --primary: #60a5fa;
  --accent: #2dd4bf;
  --neutral-bg: #13203d;
  --neutral-text: #cbd5e1;
  --neutral-border: #334155;
  --success-bg: #10261a;
  --success-text: #86efac;
  --success-border: #166534;
  --warn-bg: #3b1608;
  --warn-text: #fdba74;
  --warn-border: #9a3412;
  --shadow: none;
}

body.theme-by {
  --bg: #07111f;
  --panel: #0f1b34;
  --panel-2: #13203d;
  --text: #ffe77a;
  --muted: #f6dfa0;
  --border: #314467;
  --primary: #ffe77a;
  --accent: #fbbf24;
  --neutral-bg: #13203d;
  --neutral-text: #f6dfa0;
  --neutral-border: #314467;
  --success-bg: #253018;
  --success-text: #d9f99d;
  --success-border: #84cc16;
  --warn-bg: #4a2408;
  --warn-text: #ffd199;
  --warn-border: #d97706;
  --shadow: none;
}

body.size-large {
  font-size: 18px;
}

body.size-xl {
  font-size: 20px;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

body.embedded-exam {
  background: #fff;
}

body.embedded-exam .topbar {
  display: none;
}

body.embedded-exam .container {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
}

body.embedded-exam .footer-note {
  display: none;
}

body.embedded-exam {
  overflow: auto;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 800;
  box-shadow: var(--shadow);
}

.brand-text strong {
  display: block;
  font-size: 18px;
}

.brand-text span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav a,
.btn,
.input,
.select {
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 12px;
  font: inherit;
}

.nav a,
.btn {
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
}

.nav a.active,
.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.hero,
.grid-2,
.grid-3,
.stats {
  display: grid;
  gap: 16px;
}

.hero {
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.95fr);
  margin-bottom: 18px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.eyebrow {
  color: var(--primary);
  font-weight: 800;
  margin-bottom: 8px;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.08;
  margin-bottom: 10px;
}

.muted {
  color: var(--muted);
}

.actions,
.toolbar-row,
.meta-row,
.filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.actions {
  margin-top: 18px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 10px;
  margin-bottom: 14px;
}

.stat {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
}

.stat .label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

.stat .value {
  font-size: 26px;
  font-weight: 800;
}

.stat .sub {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.quick-link {
  display: block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.quick-link:hover {
  transform: translateY(-2px);
  border-color: #93c5fd;
  box-shadow: 0 18px 30px rgba(29, 78, 216, 0.08);
}

.quick-link h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.quick-link p {
  color: var(--muted);
  line-height: 1.7;
}

.tag,
.chip,
.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.tag,
.status-pill {
  padding: 4px 10px;
  border: 1px solid transparent;
}

.tag.success,
.status-pill.available {
  background: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.tag.warning,
.status-pill.pending {
  background: var(--warn-bg);
  color: var(--warn-text);
  border-color: var(--warn-border);
}

.status-pill.todo {
  background: var(--neutral-bg);
  color: var(--neutral-text);
  border-color: var(--neutral-border);
}

.status-pill.done {
  background: var(--success-bg);
  color: var(--success-text);
  border-color: var(--success-border);
}

.input,
.select {
  height: 42px;
  padding: 0 14px;
  color: var(--text);
}

.input {
  min-width: min(360px, 100%);
  flex: 1 1 280px;
}

.select {
  min-width: 150px;
}

.card-list {
  display: grid;
  gap: 16px;
}

.test-block {
  display: grid;
  gap: 14px;
}

.part-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.part-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  display: grid;
  gap: 10px;
}

.part-card.is-unavailable {
  opacity: 0.85;
}

.item-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: flex-start;
}

.item-statuses {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.item-id {
  font-size: 12px;
  color: var(--muted);
  font-weight: 800;
  margin-bottom: 4px;
}

.item-title {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.meta {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.chip-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.chip {
  background: rgba(100, 116, 139, 0.1);
  color: var(--muted);
  padding: 4px 8px;
}

.empty {
  padding: 18px;
  border: 1px dashed var(--border);
  border-radius: 16px;
  color: var(--muted);
  text-align: center;
}

.footer-note {
  margin-top: 16px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 900px) {
  .container {
    width: min(100% - 20px, 100%);
  }

  .hero,
  .grid-2,
  .grid-3,
  .stats,
  .part-grid {
    grid-template-columns: 1fr;
  }
}