:root {
  --bg: #f3f7fb;
  --panel: #ffffff;
  --text: #12263a;
  --muted: #4c647a;
  --edge: #d3dfeb;
  --primary: #116466;
  --primary-ink: #ffffff;
  --ok: #1e7f42;
  --bad: #b42318;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eef4fa 0%, #f8fbfe 100%);
}

.app {
  width: min(920px, 100%);
  margin: 0 auto;
  padding: 20px 16px 36px;
  display: grid;
  gap: 14px;
}

.top-bar h1 {
  margin: 0;
  font-size: clamp(26px, 4vw, 34px);
}

.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
}

.mode-badge {
  margin: 8px 0 0;
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid #9fb7cd;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: #123b5d;
  background: #e8f2fb;
}

.test-progress {
  margin: 8px 0 0;
  font-size: 13px;
  color: #214867;
  font-weight: 600;
}

.card {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 12px;
  padding: 14px;
}

.start-card {
  padding: 18px;
}

.start-title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 30px);
}

.start-copy {
  margin: 8px 0 0;
  color: var(--muted);
}

.start-actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
}

.label {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 11px;
  color: var(--muted);
}

.scenario-figure {
  margin: 12px 0 0;
  border: 1px solid var(--edge);
  border-radius: 10px;
  overflow: hidden;
  background: #e9eff6;
}

.scenario-figure img {
  display: block;
  width: 100%;
  height: clamp(240px, 42vw, 420px);
  object-fit: contain;
  object-position: center;
  background: #dde8f3;
}

.scenario-figure figcaption {
  margin: 0;
  padding: 8px 10px;
  font-size: 12px;
  color: var(--muted);
}

#questionText {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.25;
}

.choices {
  display: grid;
  gap: 8px;
}

.short-input {
  width: 100%;
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: #fff;
  resize: vertical;
}

.short-input:focus {
  outline: 2px solid #9fb7cd;
  outline-offset: 1px;
}

.choice {
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
}

.choice:hover { border-color: #9fb7cd; }
.choice input { margin: 0; }

.actions {
  display: flex;
  gap: 10px;
}

.btn {
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--primary-ink);
}

.secondary {
  background: #fff;
  color: var(--text);
}

.link-btn {
  line-height: 1.2;
}

.feedback p { margin: 6px 0; }
.feedback .ok { color: var(--ok); font-weight: 700; }
.feedback .bad { color: var(--bad); font-weight: 700; }

.activity-status {
  display: grid;
  gap: 10px;
}

.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.progress-text {
  margin: 0;
  font-weight: 700;
  color: #123b5d;
}

.indicator-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.indicator-card {
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 10px;
  background: #f8fbff;
}

.indicator-label {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

.indicator-value {
  margin: 6px 0;
  font-size: 22px;
  font-weight: 700;
}

.indicator-track {
  height: 8px;
  border-radius: 999px;
  background: #dbe7f2;
  overflow: hidden;
}

.indicator-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #5fa8d3 0%, #116466 100%);
}

.activity-card {
  display: grid;
  gap: 10px;
}

.activity-title {
  margin: 0;
  font-size: clamp(24px, 3.3vw, 31px);
}

.tradeoff-note {
  margin: 0;
  padding: 8px 10px;
  border: 1px solid #c7d8e9;
  border-radius: 8px;
  background: #f2f7fc;
  color: #214867;
  font-size: 13px;
}

.activity-choices {
  margin-top: 4px;
}

.activity-choice {
  width: 100%;
  text-align: left;
  font: inherit;
  color: var(--text);
}

.activity-summary h2 {
  margin: 0 0 8px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.summary-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 4px;
}

@media (max-width: 640px) {
  #questionText { font-size: 19px; }
  .actions { flex-direction: column; }
  .start-actions { flex-direction: column; }
  .status-row { flex-direction: column; align-items: flex-start; }
  .indicator-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .summary-grid { grid-template-columns: 1fr; }
}