:root {
  color-scheme: light;
  --bg: #f5f7f8;
  --panel: #ffffff;
  --text: #17212b;
  --muted: #687684;
  --line: #dce3e8;
  --accent: #0f766e;
  --accent-dark: #115e59;
  --warn: #b45309;
  --shadow: 0 18px 42px rgba(24, 38, 49, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

button,
input,
select {
  font: inherit;
}

.page {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 24px;
}

.toolbar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
  padding: 22px;
}

.title-block {
  display: grid;
  gap: 4px;
}

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  margin: 0;
}

h1 {
  font-size: 26px;
  line-height: 1.2;
  margin: 0;
}

.controls,
.search {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr auto;
}

.search {
  grid-template-columns: 1fr auto;
}

label {
  color: var(--muted);
  display: grid;
  font-size: 13px;
  gap: 7px;
}

select,
input {
  background: #fbfcfd;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  min-height: 44px;
  outline: none;
  padding: 0 12px;
  width: 100%;
}

select:focus,
input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

button {
  align-self: end;
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  color: #ffffff;
  cursor: pointer;
  font-weight: 700;
  min-height: 44px;
  padding: 0 18px;
}

button:hover {
  background: var(--accent-dark);
}

.summary {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 2px 14px;
}

.summary div {
  align-items: baseline;
  display: flex;
  gap: 10px;
}

.summary span {
  color: var(--muted);
  font-weight: 700;
}

.summary strong {
  color: var(--accent);
  font-size: 32px;
  line-height: 1;
}

.summary p {
  color: var(--muted);
  margin: 0;
}

.results {
  display: grid;
  gap: 12px;
}

.question-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.question-head {
  align-items: center;
  display: flex;
  gap: 8px;
  justify-content: space-between;
  margin-bottom: 10px;
}

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

.badge {
  background: #e8f3f1;
  border-radius: 999px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 8px;
}

.serial {
  background: #eef2f7;
  color: #334155;
}

.question {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  margin: 0 0 12px;
}

.options {
  display: grid;
  gap: 8px;
  margin: 0 0 14px;
  padding: 0;
}

.options li {
  background: #f7f9fa;
  border: 1px solid #e6ecef;
  border-radius: 6px;
  list-style: none;
  padding: 10px 12px;
}

.answer {
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 6px;
  color: #7c2d12;
  display: grid;
  gap: 4px;
  padding: 12px;
}

.answer span {
  color: var(--warn);
  font-size: 12px;
  font-weight: 700;
}

.empty {
  color: var(--muted);
  padding: 48px 12px;
  text-align: center;
}

.no-copy {
  -webkit-touch-callout: none;
  user-select: none;
}

@media (max-width: 720px) {
  .page {
    padding: 14px;
  }

  .toolbar {
    padding: 16px;
  }

  h1 {
    font-size: 22px;
  }

  .controls,
  .search {
    grid-template-columns: 1fr;
  }

  button {
    width: 100%;
  }

  .summary {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .question-card {
    padding: 14px;
  }
}