:root {
  --green-900: #063f37;
  --green-800: #085046;
  --green-700: #0b6759;
  --green-100: #e8f4f0;
  --green-050: #f3fbf8;
  --ink: #1f2933;
  --muted: #65717d;
  --line: #dbe3e0;
  --card: #ffffff;
  --danger: #b42318;
  --danger-bg: #fff1f0;
  --success: #067647;
  --success-bg: #ecfdf3;
  --warning-bg: #fff7e6;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: #f6f8f7;
  line-height: 1.6;
}

button, input, select { font: inherit; }

.hero {
  background: linear-gradient(160deg, var(--green-900), var(--green-700));
  color: #fff;
  padding: 28px 18px 22px;
}

.hero__inner {
  width: min(1080px, 100%);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 6px;
  opacity: 0.85;
  font-size: 0.95rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.25rem);
  letter-spacing: 0.04em;
}

.subtitle {
  margin: 8px 0 22px;
  opacity: 0.9;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border: 1px solid rgba(255, 255, 255, 0.32);
  max-width: 760px;
}

.tab {
  border: 0;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  padding: 14px 12px;
  cursor: pointer;
  min-height: 52px;
  font-weight: 700;
}

.tab + .tab { border-left: 1px solid rgba(255, 255, 255, 0.32); }

.tab.is-active {
  background: #fff;
  color: var(--green-800);
}

.app {
  width: min(1080px, calc(100% - 28px));
  margin: 24px auto 44px;
}

.panel, .question-card, .result-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.panel {
  padding: 20px;
  margin-bottom: 18px;
}

.panel h2 {
  margin: 0 0 8px;
  font-size: clamp(1.5rem, 4vw, 2rem);
}

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

.controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
  align-items: end;
}

.field label {
  display: block;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 5px;
}

select, input[type="search"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
  background: #fff;
  min-height: 46px;
}

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

.btn {
  border: 0;
  border-radius: 12px;
  padding: 11px 16px;
  cursor: pointer;
  font-weight: 800;
  min-height: 46px;
  background: var(--green-800);
  color: #fff;
}

.btn:hover, .tab:hover { filter: brightness(1.04); }

.btn.secondary {
  color: var(--green-800);
  background: var(--green-100);
}

.btn.ghost {
  color: var(--green-800);
  background: #fff;
  border: 1px solid var(--line);
}

.btn.danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.summary-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--green-050);
  color: var(--green-800);
  border: 1px solid #cfe3dc;
  font-weight: 700;
  font-size: 0.92rem;
}

.pill.muted {
  color: var(--muted);
  background: #f7f9f8;
  border-color: var(--line);
}

.progress-wrap {
  position: sticky;
  top: 0;
  z-index: 5;
  margin-bottom: 16px;
  background: rgba(246, 248, 247, 0.92);
  backdrop-filter: blur(8px);
  padding: 8px 0;
}

.progress-box {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px;
}

.progress-bar {
  flex: 1 1 220px;
  height: 12px;
  background: #edf2f1;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar > span {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--green-700);
  border-radius: inherit;
  transition: width 0.2s ease;
}

.notice {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--warning-bg);
  border: 1px solid #f0d39a;
  color: #6b4e00;
}

.result-card {
  padding: 20px;
  margin-bottom: 18px;
}

.result-score {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: baseline;
}

.result-score strong {
  font-size: clamp(2.2rem, 8vw, 4rem);
  color: var(--green-800);
  line-height: 1;
}

.quiz-list {
  display: grid;
  gap: 14px;
}

.question-card {
  padding: 18px;
}

.question-card.is-correct {
  border-color: #9ed5bb;
  background: linear-gradient(0deg, var(--success-bg), #fff 38%);
}

.question-card.is-wrong {
  border-color: #f0b8b4;
  background: linear-gradient(0deg, var(--danger-bg), #fff 38%);
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
  margin-bottom: 8px;
}

.question-title {
  margin: 0 0 14px;
  font-size: 1.12rem;
  font-weight: 800;
  color: #17232b;
}

.options {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.option {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 14px;
  padding: 12px;
  cursor: pointer;
}

.option input { margin-top: 5px; }

.option:hover { border-color: #b5cbc4; }

.option.is-selected {
  border-color: var(--green-700);
  box-shadow: 0 0 0 3px rgba(11, 103, 89, 0.12);
}

.option.is-answer {
  border-color: var(--success);
  background: var(--success-bg);
}

.option.is-missed {
  border-color: var(--danger);
  background: var(--danger-bg);
}

.answer-line {
  margin-top: 14px;
  padding: 12px;
  border-radius: 14px;
  background: #f8faf9;
  border: 1px solid var(--line);
}

.search-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 12px;
  align-items: end;
  margin-top: 18px;
}

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

.details-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.details-card summary {
  cursor: pointer;
  padding: 14px;
  font-weight: 800;
}

.details-card__body {
  padding: 0 14px 14px;
}

.empty {
  text-align: center;
  padding: 38px 18px;
  color: var(--muted);
}

.footer {
  text-align: center;
  color: var(--muted);
  padding: 24px 18px 36px;
}

@media (max-width: 780px) {
  .hero { padding-top: 22px; }
  .tabs { grid-template-columns: 1fr; }
  .tab + .tab { border-left: 0; border-top: 1px solid rgba(255, 255, 255, 0.32); }
  .controls, .search-grid { grid-template-columns: 1fr; }
  .panel, .question-card, .result-card { border-radius: 14px; }
  .question-card { padding: 15px; }
}