:root {
  --bg: #f4efe6;
  --panel: #fffdf8;
  --panel-border: #d4c7b0;
  --text: #202124;
  --muted: #6f6a60;
  --primary: #2d6a4f;
  --secondary: #9c6644;
  --danger: #9b2226;
  --accent: #dda15e;
  --ok: #2a9d8f;
  --wrong: #b5179e;
  --shadow: 0 10px 24px rgba(32, 33, 36, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "LXGW WenKai", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(circle at 20% 15%, rgba(221, 161, 94, 0.25), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(42, 157, 143, 0.2), transparent 45%),
    linear-gradient(145deg, #f0e7d7, #f7f4ee 40%, #f0ebe2);
  position: relative;
}

.bg-blur {
  position: fixed;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  filter: blur(60px);
  z-index: 0;
  pointer-events: none;
}

.bg-blur-left {
  background: rgba(156, 102, 68, 0.24);
  left: -80px;
  top: -40px;
}

.bg-blur-right {
  background: rgba(45, 106, 79, 0.22);
  right: -80px;
  bottom: -60px;
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1080px, 94vw);
  margin: 24px auto 40px;
  display: grid;
  gap: 16px;
}

.hero {
  background: linear-gradient(135deg, #284b63, #3c6e71 60%, #4d908e);
  color: #fdfdfc;
  border-radius: 16px;
  padding: 20px 24px;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.hero p {
  margin: 8px 0 0;
  opacity: 0.9;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.grid-2,
.grid-3 {
  display: grid;
  gap: 12px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 12px;
}

.label {
  display: block;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 6px;
}

input[type="number"],
input[type="text"],
textarea,
select,
input[type="file"] {
  width: 100%;
  border: 1px solid #cbbca3;
  border-radius: 10px;
  padding: 9px 10px;
  background: #fff;
  font: inherit;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  border: 1px solid #c9b18b;
  background: #fff9ef;
  color: #5a4a33;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  cursor: pointer;
  user-select: none;
}

.chip input {
  margin: 0;
}

.quick-filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.action-row {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.import-row {
  margin-top: 10px;
}

.keyword-row {
  margin-top: 12px;
  display: flex;
  align-items: flex-end;
  gap: 10px;
}

.keyword-input-wrap {
  flex: 1;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 9px 14px;
  cursor: pointer;
  font: inherit;
  transition: transform 0.08s ease, opacity 0.15s ease;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 0.88rem;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: #f9fffb;
}

.btn-secondary {
  background: var(--secondary);
  color: #fff8f0;
}

.btn-ghost {
  background: #eee3cf;
  color: #5f574d;
}

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

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

.stats-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.stat {
  border: 1px dashed #cbbca3;
  border-radius: 10px;
  padding: 8px;
  background: #fffdfa;
}

.stat-name {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
}

.stat-value {
  display: block;
  margin-top: 4px;
  font-size: 1.05rem;
  font-weight: 600;
}

.progress-track {
  margin-top: 10px;
  width: 100%;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: #e7dcc9;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #2a9d8f, #76c893);
  transition: width 0.25s ease;
}

.status-message {
  margin: 10px 0 0;
  color: #4f4a42;
}

.hint-text {
  margin: 8px 0 0;
  font-size: 0.85rem;
  color: #6f6a60;
}

.hidden {
  display: none;
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: #5d5649;
}

.question-meta {
  font-size: 0.94rem;
}

.question-index {
  font-size: 0.94rem;
}

.question-text {
  margin: 10px 0 12px;
  line-height: 1.6;
  font-size: 1.16rem;
}

.answer-area {
  display: grid;
  gap: 8px;
}

.option-item {
  border: 1px solid #ceb790;
  border-radius: 10px;
  padding: 10px;
  background: #fffcf5;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.option-item input {
  margin-top: 3px;
}

.result-box {
  margin-top: 12px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid #d5c3a8;
  background: #fffdf7;
}

.result-section {
  margin-top: 8px;
}

.result-label {
  margin: 0 0 4px;
}

.markdown-content {
  color: #3e3a33;
  line-height: 1.6;
  font-size: 0.95rem;
}

.markdown-content p,
.markdown-content ul,
.markdown-content ol,
.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
  margin: 6px 0;
}

.markdown-content ul,
.markdown-content ol {
  padding-left: 20px;
}

.markdown-content code {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 6px;
  background: #f2ead8;
  border: 1px solid #e2d2b3;
  font-family: "Consolas", "Menlo", "Monaco", monospace;
  font-size: 0.86em;
}

.md-table-wrap {
  margin: 8px 0;
  overflow-x: auto;
}

.md-table {
  width: 100%;
  min-width: 360px;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #d7c8ad;
}

.md-table th,
.md-table td {
  border: 1px solid #e0d3bb;
  padding: 8px 10px;
  vertical-align: top;
}

.md-table th {
  background: #efe4cf;
  color: #4d4438;
  font-weight: 700;
}

.md-table .md-align-left {
  text-align: left;
}

.md-table .md-align-center {
  text-align: center;
}

.md-table .md-align-right {
  text-align: right;
}

.result-box.ok {
  border-color: rgba(42, 157, 143, 0.55);
  background: rgba(42, 157, 143, 0.08);
}

.result-box.wrong {
  border-color: rgba(181, 23, 158, 0.45);
  background: rgba(181, 23, 158, 0.08);
}

.focus-toggle-btn {
  position: fixed;
  top: calc(10px + env(safe-area-inset-top));
  right: 10px;
  z-index: 40;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid #ccb48f;
  background: rgba(255, 250, 242, 0.94);
  backdrop-filter: blur(8px);
  box-shadow: 0 6px 14px rgba(32, 33, 36, 0.16);
}

.summary-panel h3 {
  margin: 0;
}

.summary-panel p {
  margin: 8px 0 14px;
}

@media (max-width: 900px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .stats,
  .stats-5 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero {
    padding: 16px 14px;
    border-radius: 14px;
  }

  .panel {
    padding: 12px;
    border-radius: 12px;
  }

  .app-shell {
    width: min(1080px, 96vw);
    margin: 12px auto 24px;
    gap: 12px;
  }

  .keyword-row {
    flex-direction: column;
    align-items: stretch;
  }

  .quick-filter-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

  .quick-filter-row .btn {
    white-space: nowrap;
    flex: 0 0 auto;
  }

  #sourceList,
  #typeList {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .chip {
    min-height: 40px;
    align-items: center;
  }

  .action-row .btn {
    flex: 1 1 calc(50% - 8px);
    min-height: 42px;
    padding: 10px 8px;
  }

  .quiz-header {
    flex-direction: column;
    gap: 4px;
  }

  .question-text {
    font-size: 1.03rem;
    line-height: 1.55;
    margin-top: 8px;
  }

  .option-item {
    padding: 12px 10px;
    min-height: 44px;
    align-items: center;
  }

  .option-item input {
    transform: scale(1.1);
  }

  .result-box {
    font-size: 0.94rem;
  }

  .md-table {
    min-width: 300px;
  }

  .quiz-panel {
    padding-bottom: 116px;
  }

  .quiz-action-row {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    margin: 0;
    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
    background: rgba(255, 253, 248, 0.94);
    backdrop-filter: blur(8px);
    border-top: 1px solid #d8c8ad;
    box-shadow: 0 -6px 18px rgba(32, 33, 36, 0.12);
    z-index: 30;
  }

  .quiz-action-row .btn {
    flex: 1 1 0;
    min-height: 44px;
    padding: 10px 6px;
    font-size: 0.94rem;
    border-radius: 10px;
  }

  .focus-toggle-btn {
    align-items: center;
    justify-content: center;
    min-height: 36px;
    font-size: 0.84rem;
  }

  body.quiz-focus-mode .hero,
  body.quiz-focus-mode .controls-panel,
  body.quiz-focus-mode .status-panel {
    display: none;
  }

  body.quiz-focus-mode .app-shell {
    margin-top: 8px;
    margin-bottom: 20px;
    gap: 8px;
  }

  body.quiz-focus-mode .quiz-panel {
    display: block;
  }
}

@media (max-width: 520px) {
  .stats,
  .stats-5 {
    grid-template-columns: 1fr;
  }

  #sourceList,
  #typeList {
    grid-template-columns: 1fr;
  }

  .action-row .btn {
    flex: 1 1 100%;
  }

  .hero h1 {
    font-size: 1.25rem;
  }

  .hero p {
    font-size: 0.9rem;
  }

  .status-message,
  .hint-text {
    font-size: 0.83rem;
  }

  .focus-toggle-btn {
    top: calc(8px + env(safe-area-inset-top));
    right: 8px;
    padding: 7px 9px;
    font-size: 0.8rem;
  }

  .quiz-panel {
    padding-bottom: 126px;
  }

  .quiz-action-row {
    gap: 6px;
    padding-left: 8px;
    padding-right: 8px;
  }

  .quiz-action-row .btn {
    font-size: 0.88rem;
  }
}