/* 北师大台州附中 · 每日读审答疑 —— 平板端优先样式（触控热区≥48px，横竖屏自适应） */
:root {
  --brand: #1d4ed8;
  --brand-dark: #1638a8;
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --warn: #b45309;
  --self-badge-bg: #fef3c7;
  --real-badge-bg: #dbeafe;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.65;
}

/* 头部与导航 */
.app-header {
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #fff;
  padding: 16px 20px 0;
}
.brand h1 { margin: 0; font-size: 1.25rem; }
.brand-sub { margin: 4px 0 12px; opacity: .85; font-size: .9rem; }
.app-nav { display: flex; gap: 8px; overflow-x: auto; }
.nav-btn {
  min-height: 48px; padding: 10px 22px;
  border: none; border-radius: 12px 12px 0 0;
  background: rgba(255,255,255,.14); color: #fff;
  font-size: 1rem; cursor: pointer;
}
.nav-btn.active { background: var(--bg); color: var(--brand-dark); font-weight: 600; }

.app-main { max-width: 1080px; margin: 0 auto; padding: 18px 14px 60px; }
.view { display: block; }
.view[hidden] { display: none; }

.card {
  background: var(--card); border-radius: var(--radius);
  padding: 20px; margin-bottom: 18px;
  box-shadow: 0 1px 4px rgba(16,24,40,.08);
}
.card-title { margin: 0 0 14px; font-size: 1.15rem; color: var(--brand-dark); }
.card-head-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.section-title { margin: 16px 0 8px; font-size: .98rem; color: var(--muted); font-weight: 600; }

/* 学科切换 */
.subject-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.subject-tab {
  min-height: 48px; padding: 10px 20px; border-radius: 999px;
  border: 2px solid var(--line); background: #fff; color: var(--ink);
  font-size: 1rem; cursor: pointer;
}
.subject-tab.active { border-color: var(--brand); background: #eff6ff; color: var(--brand-dark); font-weight: 600; }

/* 内置样题卡 */
.sample-card { border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-bottom: 12px; transition: border-color .15s, box-shadow .15s; }
.sample-card-active { border: 2px solid var(--brand); background: #f8fbff; box-shadow: 0 0 0 3px rgba(29,78,216,.12); }
.sample-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.sample-title { font-weight: 700; font-size: 1.02rem; }
.sample-src { color: var(--muted); font-size: .85rem; margin: 6px 0; }
.sample-q { margin: 8px 0 12px; }
.badge { font-size: .78rem; padding: 3px 10px; border-radius: 999px; white-space: nowrap; }
.badge-real { background: var(--real-badge-bg); color: var(--brand-dark); }
.badge-self { background: var(--self-badge-bg); color: var(--warn); }

/* 按钮与表单 */
.btn {
  min-height: 48px; padding: 10px 22px; border-radius: 12px; border: none;
  font-size: 1rem; cursor: pointer;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:active { background: var(--brand-dark); }
.btn-ghost { background: #eef2ff; color: var(--brand-dark); border: 1px solid #dbe3ff; }
.btn-big { width: 100%; font-size: 1.1rem; margin-top: 14px; }
textarea {
  width: 100%; min-height: 48px; padding: 12px; margin-top: 10px;
  border: 1.5px solid var(--line); border-radius: 10px;
  font-size: 1rem; font-family: inherit; resize: vertical;
}
textarea:focus { outline: 2px solid var(--brand); }
.photo-label { display: inline-block; margin-top: 4px; }
.photo-preview { margin: 8px 0; }
.photo-thumb { max-width: 200px; max-height: 150px; border-radius: 8px; border: 1px solid var(--line); }

/* 卡点标签 */
.tag-chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  min-height: 48px; padding: 10px 18px; border-radius: 999px;
  border: 2px solid var(--line); background: #fff; font-size: .95rem; cursor: pointer;
}
.chip-on { border-color: var(--warn); background: var(--self-badge-bg); color: var(--warn); font-weight: 600; }

/* 步骤二：四步拆解 */
.mode-switch { display: flex; gap: 6px; }
.mode-btn {
  min-height: 48px; padding: 8px 16px; border-radius: 10px;
  border: 1.5px solid var(--line); background: #fff; font-size: .92rem; cursor: pointer;
}
.mode-btn.active { border-color: var(--brand); background: #eff6ff; color: var(--brand-dark); font-weight: 600; }
.breakdown { margin-top: 6px; }
.q-highlight { background: #f8fafc; border-left: 4px solid var(--brand); padding: 12px 14px; border-radius: 8px; margin-bottom: 14px; }
.q-highlight mark { background: #fef08a; padding: 1px 3px; border-radius: 4px; }
.step-card { border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-bottom: 12px; }
.step-title { display: flex; align-items: center; gap: 10px; margin: 0 0 10px; font-size: 1.05rem; }
.step-no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--brand); color: #fff; font-size: .95rem; flex: none;
}
.tbl { width: 100%; border-collapse: collapse; margin: 8px 0; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.tbl th { background: #f1f5f9; font-size: .9rem; }
.tbl-key { white-space: nowrap; color: var(--brand-dark); font-weight: 600; }
.trap { color: var(--warn); background: #fffbeb; border: 1px dashed #fcd34d; border-radius: 8px; padding: 10px 12px; margin-top: 10px; }
.chains { display: flex; flex-direction: column; gap: 8px; margin: 6px 0; }
.chain-line { display: flex; gap: 10px; align-items: baseline; }
.chain-key { flex: none; width: 52px; text-align: center; background: #eff6ff; color: var(--brand-dark); border-radius: 8px; font-weight: 600; padding: 2px 0; }
.textbook { background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 8px; padding: 10px 12px; margin-top: 10px; }
.divider { height: 1px; background: var(--line); margin: 14px 0; }
.answer-hidden { margin-top: 10px; }
.answer-text { background: #f8fafc; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.muted { color: var(--muted); }
.framework li { margin: 6px 0; }

/* 诊断卡 */
.diagnosis { background: #fdf4ff; border: 1px solid #f0abfc; border-radius: 10px; padding: 12px 14px; }
.sub-title { margin: 10px 0 6px; font-size: .98rem; }
.diag-line { display: flex; gap: 8px; align-items: baseline; margin: 6px 0; }
.diag-code { flex: none; background: #a21caf; color: #fff; border-radius: 6px; padding: 2px 8px; font-size: .85rem; }
.jinnang { background: #fff; border-left: 4px solid #a21caf; border-radius: 6px; padding: 8px 12px; margin: 8px 0; }

/* 今日梳理 */
.daily-summary { display: flex; gap: 24px; flex-wrap: wrap; }
.stat-block { margin: 10px 0 18px; }
.stat-big { font-size: 2.2rem; font-weight: 700; color: var(--brand-dark); margin: 4px 0; }
.stat-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.stat-chip { background: #eff6ff; color: var(--brand-dark); border-radius: 999px; padding: 6px 14px; font-size: .92rem; }
.cat-line { display: flex; align-items: center; gap: 10px; margin: 8px 0; flex-wrap: wrap; }
.cat-name { flex: none; width: 100%; max-width: 280px; font-size: .92rem; }
.cat-bar { flex: 1 1 160px; height: 14px; background: #eef2f7; border-radius: 999px; overflow: hidden; }
.cat-bar-fill { display: block; height: 100%; background: linear-gradient(90deg, var(--brand), #7c3aed); border-radius: 999px; }
.cat-pct { flex: none; font-size: .9rem; color: var(--muted); }
.textbook-list { margin: 6px 0; padding-left: 22px; }
.daily-record { border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-bottom: 12px; page-break-inside: avoid; }
.record-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.record-subject { background: var(--brand); color: #fff; border-radius: 6px; padding: 2px 10px; font-size: .85rem; }
.record-q { margin: 6px 0; }
.record-diag { color: #a21caf; font-size: .92rem; }
.variant { background: #fffbeb; border: 1px dashed #fcd34d; border-radius: 10px; padding: 10px 12px; margin-top: 10px; }
.variant .badge { margin-bottom: 6px; display: inline-block; }
.variant-input { margin-top: 8px; }

/* 归档 */
.archive-card { border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-bottom: 12px; }
.archive-card h3 { margin: 0 0 8px; }

.app-footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 10px 16px 30px; }

/* 竖屏窄屏（手机/平板竖持）适配 */
@media (max-width: 640px) {
  body { font-size: 16px; }
  .card { padding: 14px; }
  .cat-name { width: 100%; max-width: none; }
  .chain-line { flex-wrap: wrap; }
}

/* 打印样式：只输出《今日读审问题梳理单》 */
@media print {
  body { background: #fff; font-size: 12pt; }
  .app-header, .app-footer, .no-print, .btn, .mode-switch, .variant-input { display: none !important; }
  .view[hidden] { display: block; }
  #view-solve, #view-archive { display: none !important; }
  .card { box-shadow: none; border: none; padding: 0; }
  .cat-bar { border: 1px solid #999; }
  .answer-text { border: 1px solid #ccc; }
}