:root {
  --bg: #f4f7f5;
  --surface: #ffffff;
  --surface-soft: #eef5ef;
  --ink: #172323;
  --muted: #61706c;
  --line: rgba(23, 35, 35, 0.12);
  --accent: #c95836;
  --accent-dark: #8d3520;
  --forest: #276653;
  --blue: #315f8f;
  --gold: #d39a28;
  --shadow: 0 12px 30px rgba(25, 38, 34, 0.08);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(39, 102, 83, 0.1), transparent 32%),
    linear-gradient(180deg, #eef5ef 0%, #f7f8fa 52%, #fff 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
}

.app-shell {
  width: min(1220px, calc(100% - 32px));
  margin: 20px auto 72px;
}

.hero,
.toolbar,
.week-panel,
.current-day,
.record-panel,
.resources,
.stat-box,
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 22px;
  padding: 28px;
}

.back-link {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--forest);
  text-decoration: none;
  font-size: 14px;
}

.hero h1 {
  margin: 0;
  font-family: "KaiTi", "STKaiti", serif;
  font-size: clamp(38px, 5vw, 62px);
  line-height: 1.05;
}

.hero-text {
  max-width: 760px;
  margin: 16px 0 22px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions,
.record-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button,
.toolbar a,
.mobile-dock button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover,
.toolbar a:hover,
.mobile-dock button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 10px 22px rgba(201, 88, 54, 0.22);
}

.button-secondary {
  background: var(--forest);
  color: #fff;
  box-shadow: 0 10px 22px rgba(39, 102, 83, 0.18);
}

.button-ghost,
.button-light {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}

.hero-meter {
  display: grid;
  align-content: center;
  gap: 12px;
  padding: 18px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(238, 245, 239, 0.95), rgba(255, 255, 255, 0.95));
  border: 1px solid rgba(39, 102, 83, 0.14);
}

.hero-meter span,
.stat-box span,
.small-label {
  display: block;
  color: var(--accent-dark);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-meter strong {
  display: block;
  margin-top: 6px;
  font-size: 36px;
}

.hero-meter p,
.stat-box p,
.section-head p,
.day-card p,
.panel p,
.resource-grid span {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.meter-track {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(23, 35, 35, 0.09);
}

.meter-track div {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--forest), var(--accent));
  transition: width 200ms ease;
}

.toolbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: end;
  margin: 14px 0;
  padding: 14px;
  backdrop-filter: blur(12px);
}

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

.toolbar select,
.record-grid input,
.record-grid select,
.record-grid textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  color: var(--ink);
  background: #fff;
}

.toolbar label {
  min-width: 170px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat-box {
  padding: 18px;
}

.stat-box strong {
  display: block;
  margin: 8px 0 6px;
  font-size: 28px;
}

.week-panel,
.current-day,
.record-panel,
.resources {
  margin-top: 16px;
  padding: 22px;
}

.section-head {
  margin-bottom: 16px;
}

.section-head h2,
.day-title h2 {
  margin: 0 0 8px;
  font-family: "KaiTi", "STKaiti", serif;
  font-size: clamp(28px, 3vw, 40px);
}

.day-strip {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 10px;
}

.day-card {
  min-height: 118px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  cursor: pointer;
  text-align: left;
}

.day-card.is-active {
  border-color: rgba(201, 88, 54, 0.45);
  box-shadow: 0 10px 22px rgba(201, 88, 54, 0.14);
}

.day-card strong {
  display: block;
  margin-bottom: 6px;
}

.day-progress {
  display: inline-flex;
  margin-top: 10px;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--forest);
  font-size: 12px;
}

.day-title {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 16px;
}

.day-meta {
  max-width: 420px;
  padding: 12px;
  border-left: 4px solid var(--forest);
  background: var(--surface-soft);
  border-radius: var(--radius);
  color: var(--muted);
  line-height: 1.7;
}

.task-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 16px;
}

.panel {
  padding: 18px;
}

.panel h3 {
  margin: 0 0 12px;
  font-size: 24px;
}

.task-group {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

.task-group:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.task-group h4,
.answer-block h4 {
  margin: 0 0 10px;
  color: var(--forest);
  font-size: 18px;
}

.task-list {
  display: grid;
  gap: 8px;
}

.fallback-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 12px 0;
  padding: 10px;
  border-radius: var(--radius);
  background: #fffaf0;
  border: 1px solid rgba(211, 154, 40, 0.22);
}

.fallback-bar span,
.task-hint {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.task-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  padding: 10px 12px;
  border-radius: var(--radius);
  background: #f7faf8;
  border: 1px solid rgba(23, 35, 35, 0.07);
}

.task-check {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.task-item input {
  width: 18px;
  height: 18px;
  margin-top: 3px;
}

.task-item span {
  line-height: 1.65;
}

.task-item.is-done {
  background: #edf6ee;
}

.task-item.is-done span {
  color: var(--muted);
  text-decoration: line-through;
}

.wrong-toggle {
  min-height: 30px;
  padding: 5px 9px;
  border-radius: var(--radius);
  color: var(--accent-dark);
  background: #fff;
  border: 1px solid rgba(201, 88, 54, 0.22);
  cursor: pointer;
  white-space: nowrap;
}

.wrong-toggle.is-active {
  color: #fff;
  background: var(--accent);
}

.task-hint {
  grid-column: 1 / -1;
  padding-left: 32px;
}

.task-group.is-review {
  padding: 12px;
  border: 1px solid rgba(49, 95, 143, 0.18);
  border-radius: var(--radius);
  background: #f8fbff;
}

.problem-list,
.answer-list,
.fact-list {
  display: grid;
  gap: 10px;
}

.problem-card,
.answer-block,
.fact-list {
  padding: 12px;
  border-radius: var(--radius);
  background: #f8fbff;
  border: 1px solid rgba(49, 95, 143, 0.14);
}

.problem-card strong,
.answer-block strong {
  display: block;
  margin-bottom: 6px;
}

.fact-list {
  background: #fffaf0;
  border-color: rgba(211, 154, 40, 0.22);
}

.fact-chip {
  display: inline-flex;
  margin: 3px;
  padding: 6px 8px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid rgba(211, 154, 40, 0.18);
}

.parent-note {
  padding: 12px;
  border-radius: var(--radius);
  background: #fff7f2;
  border: 1px solid rgba(201, 88, 54, 0.14);
}

.record-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.record-grid textarea {
  min-height: 94px;
  resize: vertical;
}

.wide-field {
  grid-column: span 2;
}

.record-actions {
  margin-top: 12px;
}

.advice-box {
  margin: 14px 0 0;
  padding: 14px;
  border-radius: var(--radius);
  background: #172323;
  color: #f7fbf7;
  white-space: pre-wrap;
  line-height: 1.7;
  overflow: auto;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.resource-grid a {
  display: grid;
  gap: 6px;
  min-height: 98px;
  padding: 14px;
  border-radius: var(--radius);
  color: var(--ink);
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--line);
}

.resource-grid strong {
  font-size: 18px;
}

.mobile-dock {
  display: none;
}

.load-error {
  padding: 18px;
  border-radius: var(--radius);
  background: #fff2ee;
  border: 1px solid rgba(201, 88, 54, 0.25);
  color: var(--accent-dark);
}

@media (max-width: 980px) {
  .hero,
  .task-layout,
  .stats-grid,
  .record-grid,
  .resource-grid {
    grid-template-columns: 1fr;
  }

  .wide-field {
    grid-column: auto;
  }

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

  .day-title {
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 16px, 1220px);
    margin: 8px auto 86px;
  }

  .hero,
  .week-panel,
  .current-day,
  .record-panel,
  .resources {
    padding: 16px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero-text {
    font-size: 16px;
  }

  .toolbar {
    position: static;
  }

  .toolbar label,
  .toolbar a,
  .hero-actions .button,
  .record-actions .button {
    width: 100%;
  }

  .day-strip {
    grid-template-columns: 1fr;
  }

  .mobile-dock {
    position: sticky;
    bottom: 10px;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    margin: 16px 10px 10px;
    padding: 10px;
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--line);
    box-shadow: 0 14px 28px rgba(25, 38, 34, 0.14);
  }

  .mobile-dock button {
    min-height: 44px;
    color: var(--ink);
    background: var(--surface-soft);
  }
}

@page {
  size: A4;
  margin: 10mm;
}

@media print {
  body {
    background: #fff;
    color: #111;
    font-size: 8.6pt;
  }

  .no-print,
  .toolbar,
  .stats-grid,
  .week-panel,
  .record-panel,
  .resources,
  .hero-meter,
  .mobile-dock,
  #parentView {
    display: none !important;
  }

  .app-shell {
    width: 100%;
    max-width: none;
    margin: 0;
  }

  .hero,
  .current-day,
  .panel {
    box-shadow: none;
    border: 0;
    background: #fff;
    padding: 0;
  }

  .hero {
    display: none;
  }

  .current-day {
    padding: 0;
  }

  .day-title {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5mm;
    margin-bottom: 2.5mm;
  }

  .day-title h2 {
    margin: 0;
    font-size: 13pt;
    line-height: 1.2;
  }

  .day-meta {
    border: 1px solid #ddd;
    border-left: 2mm solid #315f50;
    background: #fff;
    max-width: none;
    padding: 1.8mm 2.2mm;
    line-height: 1.25;
  }

  .task-layout {
    display: block;
  }

  .panel h3 {
    margin-bottom: 1.5mm;
    font-size: 11pt;
  }

  .panel p,
  .task-item span {
    line-height: 1.22;
  }

  .panel p {
    margin: 0 0 1.5mm;
  }

  .task-group {
    margin-top: 2mm;
    padding-top: 2mm;
  }

  .task-list,
  .answer-list {
    gap: 1mm;
  }

  .task-group h4,
  .answer-block h4 {
    margin-bottom: 1mm;
    font-size: 10pt;
  }

  .task-item,
  .problem-card,
  .answer-block,
  .parent-note {
    padding: 1.2mm 1.6mm;
  }

  .task-item {
    gap: 1.5mm;
    border-radius: 2mm;
  }

  .task-check {
    grid-template-columns: 4mm minmax(0, 1fr);
    gap: 1.5mm;
  }

  .task-item input {
    width: 3.4mm;
    height: 3.4mm;
    margin-top: 0.4mm;
  }

  .task-hint {
    padding-left: 5.5mm;
    font-size: 8pt;
    line-height: 1.2;
  }

  .task-group.is-review {
    padding: 1.5mm;
  }

  .wrong-toggle {
    display: none;
  }

  .print-main,
  body.print-parent #parentView {
    break-after: avoid-page;
    page-break-after: avoid;
  }

  body.print-parent #studentView {
    display: none !important;
  }

  body.print-parent #parentView {
    display: block !important;
  }

  body.print-parent .task-layout {
    display: block;
  }

  .task-item,
  .problem-card,
  .answer-block,
  .task-group {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}