:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #1d2433;
  --ink-soft: #5c677d;
  --line: #e4e8f2;
  --brand: #4f7cff;
  --brand-soft: #e8eeff;
  --ok: #22a06b;
  --warn: #e0851f;
  --danger: #e05252;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(29, 36, 51, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  padding-bottom: 40px;
  -webkit-text-size-adjust: 100%;
}

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 20px 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: flex-end;
  justify-content: space-between;
}

h1 {
  font-size: 21px;
  margin: 0;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

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

.stat {
  background: var(--brand-soft);
  border-radius: 10px;
  padding: 6px 14px;
  text-align: center;
  min-width: 74px;
}

.stat span {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--brand);
}

.stat small {
  font-size: 11px;
  color: var(--ink-soft);
}

.tabs {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 12px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
}

.tabs button {
  border: none;
  background: none;
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--ink-soft);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.tabs button.active {
  color: var(--brand);
  border-bottom-color: var(--brand);
  font-weight: 700;
}

main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 20px 60px;
}

.loading {
  color: var(--ink-soft);
  padding: 40px 0;
  text-align: center;
}

.share-banner {
  max-width: 1080px;
  margin: 14px auto 0;
  padding: 10px 16px;
  border-radius: 10px;
  background: #fff6d9;
  border: 1px solid #f0dca8;
  color: #8a6100;
  font-size: 13px;
}

.share-banner strong {
  margin-right: 4px;
}

@media (max-width: 720px) {
  .share-banner {
    margin: 10px 14px 0;
  }
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  margin-bottom: 16px;
}

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

.card-head h2 {
  font-size: 16px;
  margin: 0;
}

.card-head .hint {
  font-size: 12px;
  color: var(--ink-soft);
}

.task {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.task:first-of-type {
  border-top: none;
}

.task input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  flex: 0 0 auto;
  accent-color: var(--ok);
  cursor: pointer;
}

.task-body {
  flex: 1;
  min-width: 0;
}

.task-title {
  margin: 0;
}

.task.done .task-title {
  text-decoration: line-through;
  color: var(--ink-soft);
}

.task-meta {
  margin: 3px 0 0;
  font-size: 12px;
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tag {
  display: inline-block;
  border-radius: 20px;
  padding: 1px 9px;
  font-size: 11px;
  line-height: 1.7;
  background: #eef1f7;
  color: var(--ink-soft);
}

.tag.track {
  color: #fff;
}

.tag.late {
  background: #fdeceb;
  color: var(--danger);
}

.tag.minutes {
  background: #eef4ff;
  color: var(--brand);
}

.term {
  border: none;
  background: #fff6d9;
  color: #8a6100;
  font: inherit;
  padding: 0 3px;
  border-radius: 4px;
  cursor: pointer;
  border-bottom: 1px dashed #d0a53a;
}

.term:hover {
  background: #ffefb8;
}

.btn {
  font: inherit;
  font-size: 13px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 6px 13px;
  cursor: pointer;
}

.btn:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.btn.primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.btn.primary:hover {
  filter: brightness(1.06);
  color: #fff;
}

.bar {
  height: 8px;
  border-radius: 6px;
  background: #eef1f7;
  overflow: hidden;
}

.bar > span {
  display: block;
  height: 100%;
  border-radius: 6px;
  background: var(--brand);
  transition: width 0.3s ease;
}

.track-row {
  border-top: 1px solid var(--line);
  padding: 13px 0;
}

.track-row:first-of-type {
  border-top: none;
}

.track-row-head {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.track-row-head strong {
  font-size: 15px;
}

.track-row-head .pct {
  margin-left: auto;
  color: var(--ink-soft);
  font-size: 13px;
}

.track-detail {
  margin-top: 10px;
  padding-left: 20px;
}

.track-detail ul {
  margin: 8px 0 0;
  padding-left: 18px;
  font-size: 13px;
  color: var(--ink-soft);
}

.week-grid,
.heatmap {
  display: grid;
  gap: 5px;
}

.week-grid {
  grid-template-columns: repeat(7, 1fr);
}

.heatmap {
  grid-template-columns: repeat(7, 1fr);
  max-width: 420px;
}

.cell {
  border-radius: 6px;
  background: #eef1f7;
  min-height: 34px;
  padding: 4px;
  font-size: 10px;
  color: var(--ink-soft);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
  border: 1px solid transparent;
}

.heatmap .cell {
  min-height: 26px;
  padding: 0;
}

.cell.today {
  border-color: var(--brand);
  font-weight: 700;
}

.cell .cell-date {
  font-size: 9px;
  opacity: 0.75;
}

.cell.p0 {
  background: #eef1f7;
}

.cell.p1 {
  background: #cfe6da;
}

.cell.p2 {
  background: #8fd0ac;
}

.cell.p3 {
  background: #4fb383;
}

.cell.p4 {
  background: #1f8a5c;
  color: #fff;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

input[type="search"],
input[type="text"],
input[type="time"],
input[type="number"],
textarea,
select {
  font: inherit;
  padding: 8px 11px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  width: 100%;
}

input[type="search"] {
  flex: 1 1 220px;
  width: auto;
}

.chip {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 20px;
  padding: 5px 13px;
  font-size: 13px;
  font-family: inherit;
  color: var(--ink-soft);
  cursor: pointer;
}

.chip.active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.glossary-list {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.term-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  border-left: 3px solid var(--line);
}

.term-card.read {
  opacity: 0.72;
}

.term-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.term-card dl {
  margin: 0;
}

.term-card dt {
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  margin-top: 8px;
}

.term-card dd {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--ink);
}

.level-now {
  background: #fdeceb;
  color: var(--danger);
}

.level-know {
  background: #fff4e2;
  color: var(--warn);
}

.level-later {
  background: #eef1f7;
  color: var(--ink-soft);
}

.term-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(420px, 92vw);
  background: var(--card);
  box-shadow: -6px 0 24px rgba(29, 36, 51, 0.16);
  padding: 22px 20px 40px;
  overflow-y: auto;
  z-index: 40;
}

.term-panel h2 {
  font-size: 18px;
  margin: 0 24px 10px 0;
}

.term-panel dl {
  margin: 0;
}

.term-panel dt {
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  margin-top: 12px;
}

.term-panel dd {
  margin: 3px 0 0;
  font-size: 14px;
}

.panel-close {
  position: absolute;
  top: 12px;
  right: 14px;
  border: none;
  background: none;
  font-size: 26px;
  line-height: 1;
  color: var(--ink-soft);
  cursor: pointer;
}

.panel-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(29, 36, 51, 0.35);
  z-index: 30;
}

.related {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.roadmap-item {
  border-left: 3px solid var(--brand);
  padding-left: 14px;
  margin-bottom: 18px;
}

.roadmap-item h3 {
  margin: 0;
  font-size: 15px;
}

.roadmap-item .period {
  font-size: 12px;
  color: var(--ink-soft);
}

.roadmap-item ul,
.plain-list {
  margin: 8px 0 0;
  padding-left: 20px;
}

.roadmap-item li,
.plain-list li {
  margin-bottom: 4px;
}

.field {
  margin-bottom: 14px;
  max-width: 420px;
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 5px;
}

.field .desc {
  font-size: 12px;
  color: var(--ink-soft);
  margin: 4px 0 0;
}

.note-area {
  margin-top: 8px;
}

.empty {
  color: var(--ink-soft);
  font-size: 14px;
  padding: 8px 0;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  background: #1d2433;
  color: #fff;
  border-radius: 22px;
  padding: 9px 20px;
  font-size: 13px;
  z-index: 60;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
}

@media (max-width: 720px) {
  .topbar-inner {
    padding: 12px 14px 8px;
  }

  h1 {
    font-size: 18px;
  }

  .stats {
    width: 100%;
    justify-content: space-between;
  }

  .stat {
    flex: 1;
    min-width: 0;
    padding: 5px 8px;
  }

  main {
    padding: 14px 14px 60px;
  }

  .glossary-list {
    grid-template-columns: 1fr;
  }

  .heatmap {
    max-width: none;
  }
}