:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5e6b82;
  --line: #d9e0ea;
  --surface: #ffffff;
  --soft: #f4f7fb;
  --brand: #0f5ca8;
  --brand-dark: #0b457d;
  --danger: #b42318;
  --ok: #087443;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #eef5fc 0%, #ffffff 42%);
}

a {
  color: inherit;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 18px 60px rgba(29, 53, 87, 0.08);
}

.hero {
  min-height: 330px;
  display: grid;
  align-content: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  max-width: 760px;
  font-size: clamp(2.1rem, 4vw, 4rem);
}

h2 {
  font-size: 1.05rem;
}

.lede {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.65;
}

.actions,
.toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.button,
button {
  border: 0;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  padding: 11px 16px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.button:hover,
button:hover {
  background: var(--brand-dark);
}

.secondary,
button.secondary {
  background: #e8f0fa;
  color: var(--brand-dark);
}

.danger {
  background: var(--danger);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.grid article,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.grid p,
.card p,
label {
  color: var(--muted);
  line-height: 1.55;
}

.stack {
  display: grid;
  gap: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  font-weight: 650;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.status {
  min-height: 26px;
  color: var(--muted);
  font-weight: 650;
}

.status.error {
  color: var(--danger);
}

.status.ok {
  color: var(--ok);
}

.help-text {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.quiz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 16px;
}

.timer {
  font-size: 2rem;
  font-weight: 800;
  color: var(--brand-dark);
}

.option-list {
  display: grid;
  gap: 10px;
}

.option-list button {
  text-align: left;
  background: #f7f9fc;
  color: var(--ink);
  border: 1px solid var(--line);
}

.locked {
  border-color: #f2b8b5;
  background: #fff5f5;
}

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

th,
td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 10px;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 0.86rem;
}

@media (max-width: 760px) {
  .grid,
  .form-grid,
  .quiz-layout {
    grid-template-columns: 1fr;
  }

  .shell {
    width: min(100% - 22px, 1120px);
    padding: 24px 0;
  }
}