:root {
  color-scheme: dark;
  --bg: #101418;
  --panel: #171d22;
  --panel-2: #1e252b;
  --border: #303a43;
  --text: #edf2f4;
  --muted: #a8b3bd;
  --green: #2fa36b;
  --blue: #4b8fe8;
  --red: #e15b64;
  --yellow: #d7a84f;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, select, textarea, input {
  font: inherit;
}

button, select {
  min-height: 38px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
}

input {
  width: 100%;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d1115;
  color: var(--text);
}

button {
  padding: 0 14px;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: .55;
}

select {
  padding: 0 34px 0 12px;
}

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

h1 {
  margin-bottom: 8px;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1;
}

h2 {
  margin-bottom: 12px;
  font-size: 20px;
}

h3 {
  font-size: 19px;
  line-height: 1.45;
}

.app {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 44px;
}

.topbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

.eyebrow {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

.subtitle {
  max-width: 760px;
  margin-bottom: 0;
  line-height: 1.5;
}

.level-card {
  min-width: 180px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
}

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

.level-card strong {
  display: block;
  margin-top: 4px;
  font-size: 26px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  overflow-x: auto;
}

.tab {
  min-width: 116px;
  background: transparent;
}

.tab.active {
  border-color: var(--green);
  background: color-mix(in srgb, var(--green) 16%, transparent);
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.panel, .metrics article, .topic-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
}

.panel {
  padding: 16px;
  margin-bottom: 16px;
}

.auth-view {
  display: grid;
  min-height: 420px;
  align-items: center;
}

.auth-panel {
  width: min(420px, 100%);
  margin: 0 auto;
}

.auth-panel label {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
  color: var(--muted);
}

.form-error {
  min-height: 22px;
  margin-bottom: 10px;
  color: #ffb0b5;
}

.compact-text {
  margin: 12px 0 0;
  font-size: 13px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.metrics article {
  padding: 14px;
}

.metrics span, .topic-card dt {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metrics strong {
  display: block;
  margin-top: 6px;
  font-size: 28px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, .8fr);
  gap: 16px;
}

.section-head, .trainer-head, .row, .filters, .question-topline, .topic-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.section-head, .trainer-head, .question-topline {
  justify-content: space-between;
}

.filters, .row, .topic-actions {
  flex-wrap: wrap;
}

.topic-progress {
  display: grid;
  gap: 8px;
}

.topic-row, .mini-item {
  width: 100%;
  min-height: 52px;
  justify-content: space-between;
  text-align: left;
}

.topic-row {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 12px;
  align-items: center;
  padding: 10px;
}

.topic-row small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
}

.topic-row i {
  display: block;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #263039;
}

.topic-row i b {
  display: block;
  width: var(--value);
  height: 100%;
  background: var(--green);
}

.stack {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.stack.compact {
  margin-bottom: 0;
}

.mini-item {
  display: flex;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
}

.user-list {
  display: grid;
  gap: 8px;
}

.user-row {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
}

.user-row small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
}

.mini-item span {
  color: var(--muted);
}

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

.topic-card {
  display: grid;
  gap: 14px;
  padding: 16px;
}

.topic-card p {
  color: var(--muted);
  line-height: 1.45;
}

.badge {
  display: inline-flex;
  min-height: 24px;
  align-items: center;
  padding: 0 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--blue) 18%, transparent);
  color: #cfe0ff;
  font-size: 12px;
}

dl {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
}

dt, dd {
  margin: 0;
}

dd {
  margin-top: 2px;
  font-weight: 700;
}

.primary {
  border-color: var(--green);
  background: var(--green);
  color: #06120b;
  font-weight: 700;
}

.secondary {
  border-color: #496170;
  background: #24313a;
}

.ghost {
  background: transparent;
}

.hidden {
  display: none !important;
}

.question-topline {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
}

.answers {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0 0 12px;
  list-style: none;
}

.answer {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  text-align: left;
}

.answer.selected {
  border-color: var(--blue);
  background: color-mix(in srgb, var(--blue) 18%, var(--panel-2));
}

.answer.correct {
  border-color: var(--green);
}

.answer.wrong {
  border-color: var(--red);
}

.open-answer {
  width: 100%;
  resize: vertical;
  margin-bottom: 12px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d1115;
  color: var(--text);
  line-height: 1.5;
}

.scenario {
  margin-bottom: 10px;
  padding: 10px 12px;
  border-left: 3px solid var(--yellow);
  background: #171a18;
  color: var(--muted);
}

.confidence {
  display: grid;
  grid-template-columns: auto 1fr 56px;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
  color: var(--muted);
}

.feedback {
  min-height: 48px;
  margin-bottom: 12px;
  color: var(--muted);
  line-height: 1.55;
}

.feedback h4 {
  margin: 12px 0 4px;
  color: var(--text);
}

.feedback p {
  white-space: pre-wrap;
}

.ok, .needs-work {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 0 9px;
  border-radius: 999px;
  font-weight: 700;
}

.ok {
  background: color-mix(in srgb, var(--green) 18%, transparent);
  color: #9be0bd;
}

.needs-work {
  background: color-mix(in srgb, var(--red) 18%, transparent);
  color: #ffb0b5;
}

.result-grid {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

@media (max-width: 820px) {
  .topbar, .dashboard-grid, .catalog-grid {
    grid-template-columns: 1fr;
  }

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

  .section-head, .trainer-head, .question-topline {
    align-items: flex-start;
    flex-direction: column;
  }

  .filters, .filters select, .filters button {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .app {
    width: min(100% - 20px, 1180px);
    padding-top: 18px;
  }

  .metrics, dl, .topic-row {
    grid-template-columns: 1fr;
  }

  .confidence {
    grid-template-columns: 1fr;
  }
}