/* 天天口算 · 样式
   符合 GB 40070-2021《儿童青少年学习用品近视防控卫生要求》（强制性国标）：
   小学一、二年级文字 ≥16pt（3号）、行距 ≥5mm、课业簿册行高 ≥8mm。
   专为上海嘉定华五小学一年级学生（妮妮）定制打造。 */

:root {
  --ink: #16202c;
  --line: #cbd5e1;
  --line-light: #e2e8f0;
  --accent: #2563eb;
  --accent-light: #eff6ff;
  --accent-hover: #1d4ed8;
  --soft: #f8fafc;
  --warn: #ea580c;
  --danger: #dc2626;
  --success: #16a34a;
  --star: #f59e0b;
  --card-bg: #ffffff;
  --body-bg: #f1f5f9;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 15px/1.6 "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink); background: var(--body-bg);
  -webkit-font-smoothing: antialiased;
}
kbd { font: 12px ui-monospace, Consolas, monospace; background: #e7ecf3; padding: 2px 6px; border-radius: 4px; }

/* ---------- 应用外壳 ---------- */
.app { display: grid; grid-template-columns: 360px 1fr; min-height: 100vh; }
.side {
  background: var(--card-bg); border-right: 1px solid var(--line);
  padding: 16px 18px 50px; overflow-y: auto; max-height: 100vh;
}
.main { padding: 18px 24px 70px; overflow-y: auto; max-height: 100vh; }

/* 头部品牌与妮妮专属档案卡片 */
.brand { font-size: 18px; font-weight: 800; color: #0f172a; letter-spacing: -0.01em; display: flex; align-items: center; justify-content: space-between; }
.brand small { display: block; font-weight: 500; font-size: 12px; color: #64748b; margin-top: 2px; }

.nini-card {
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
  border: 1px solid #bfdbfe; border-radius: 12px;
  padding: 12px 14px; margin: 12px 0 6px;
  box-shadow: 0 1px 3px rgba(37,99,235,0.06);
}
.nini-head { display: flex; align-items: center; gap: 10px; }
.nini-avatar { font-size: 28px; line-height: 1; filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1)); }
.nini-info { flex: 1; }
.nini-name { font-size: 15px; font-weight: 700; color: #1e3a8a; display: flex; align-items: center; gap: 6px; }
.nini-school { font-size: 11.5px; color: #475569; margin-top: 1px; }
.nini-stats {
  display: flex; gap: 8px; margin-top: 8px; padding-top: 8px;
  border-top: 1px dashed #cbd5e1; font-size: 12px;
}
.stat-pill {
  flex: 1; background: #ffffff; border: 1px solid #e2e8f0; border-radius: 6px;
  padding: 4px 6px; text-align: center;
}
.stat-pill b { display: block; font-size: 13px; color: #0f172a; }
.stat-pill span { font-size: 10.5px; color: #64748b; }

/* 侧边栏卡片与表单 */
fieldset {
  border: 1px solid #e2e8f0; border-radius: 10px; margin: 12px 0 0;
  padding: 10px 14px 14px; background: #ffffff;
}
legend {
  font-size: 12.5px; font-weight: 700; color: #334155; padding: 0 6px;
  display: flex; align-items: center; gap: 4px;
}
label.f { display: block; font-size: 12px; font-weight: 600; color: #475569; margin: 9px 0 4px; }
input[type=number], select {
  width: 100%; padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px;
  font: inherit; font-size: 13.5px; background: #fff; color: var(--ink);
  transition: border-color .15s;
}
input[type=number]:focus, select:focus { border-color: var(--accent); outline: none; }
input[type=range] { width: 100%; accent-color: var(--accent); }
.row { display: flex; gap: 8px; }
.row > * { flex: 1; }
.check {
  display: flex; align-items: center; gap: 8px; font-size: 13px;
  margin: 6px 0; color: #334155; cursor: pointer; user-select: none;
}
.check input { width: 15px; height: 15px; cursor: pointer; accent-color: var(--accent); }
.hint { font-size: 11.5px; color: #64748b; margin: 5px 0 0; line-height: 1.5; }
.hint b { color: var(--warn); }

/* 按钮规范 */
button {
  font: inherit; font-size: 13px; padding: 7px 12px; border-radius: 7px; cursor: pointer;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  transition: all .15s ease;
}
button:hover { border-color: var(--accent); color: var(--accent); background: #f8fafc; }
button.primary {
  background: var(--accent); border-color: var(--accent); color: #fff;
  font-weight: 600; box-shadow: 0 1px 3px rgba(37,99,235,0.2);
}
button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
button.danger { background: #fee2e2; border-color: #fca5a5; color: #b91c1c; font-weight: 600; }
button.danger:hover { background: #fecaca; }
button.warm { background: #fef3c7; border-color: #fde68a; color: #b45309; font-weight: 600; }
button.warm:hover { background: #fde68a; }

.bar { display: flex; gap: 8px; flex-wrap: wrap; margin: 14px 0 0; }
.bar button { flex: 1; min-width: 100px; padding: 8px 10px; }

#presets { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 8px; }
.preset {
  font-size: 11.5px; padding: 4px 10px; border-radius: 16px;
  background: #f1f5f9; border: 1px solid #e2e8f0; color: #334155;
}
.preset:hover { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }

/* 年级筛选与知识点严格排列 (满足需求 2) */
.grade-tabs { display: flex; gap: 4px; margin: 8px 0 6px; }
.grade-tab {
  flex: 1; font-size: 11.5px; padding: 4px 2px; text-align: center;
  border: 1px solid #cbd5e1; border-radius: 6px; background: #fff; color: #475569;
}
.grade-tab.on { background: #1e293b; border-color: #1e293b; color: #fff; font-weight: 600; }

#topicList {
  max-height: 280px; overflow-y: auto; border: 1px solid #e2e8f0;
  border-radius: 8px; padding: 6px; background: #f8fafc;
}
.tgroup { margin-bottom: 10px; }
.tgh {
  font-size: 11px; color: #475569; font-weight: 700; margin: 4px 2px 3px;
  display: flex; align-items: center; justify-content: space-between;
}
.trow {
  display: flex; align-items: center; gap: 7px; padding: 4px 6px;
  border-radius: 6px; cursor: pointer; font-size: 12.5px; background: #ffffff;
  margin-bottom: 2px; border: 1px solid #f1f5f9;
}
.trow:hover { background: var(--soft); border-color: #cbd5e1; }
.trow.on { background: #eff6ff; border-color: #bfdbfe; font-weight: 600; }
.trow input { width: auto; accent-color: var(--accent); }
.tn { flex: 1; }
.tmeta { font-size: 10.5px; color: #64748b; font-weight: 400; }

/* 运算项数与连加连减选项卡 (满足需求 6) */
.term-box {
  background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px;
  padding: 8px 10px; margin: 6px 0;
}
.term-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.chain-forms {
  display: flex; gap: 8px; margin-top: 6px; padding-top: 6px;
  border-top: 1px dashed #e2e8f0; font-size: 11.5px; color: #475569;
}

/* ---------- 标签页 ---------- */
.tabs {
  display: flex; gap: 6px; border-bottom: 2px solid #e2e8f0; margin-bottom: 16px;
  overflow-x: auto;
}
.tabs button {
  border: none; border-bottom: 2px solid transparent; margin-bottom: -2px;
  border-radius: 0; font-size: 14px; font-weight: 500; color: #64748b;
  padding: 8px 14px; background: transparent; white-space: nowrap;
}
.tabs button:hover { color: var(--accent); background: transparent; }
.tabs button.on {
  border-bottom-color: var(--accent); color: var(--accent); font-weight: 700;
}
.tabpane { display: none; }
.tabpane.on { display: block; animation: fadeIn .15s ease-in; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- A4 连续排版与打印规范 (GB 40070-2021) ---------- */
.paper-preview-container {
  display: flex; flex-direction: column; align-items: center; width: 100%;
  overflow-x: auto; padding: 4px 0 100px;
}
.stack {
  display: flex; flex-direction: column; gap: 20px; align-items: center;
  transition: transform .15s ease-out; transform-origin: top center;
}
.flow {
  width: 210mm; min-width: 210mm; box-sizing: border-box; background: #fff;
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.08), 0 1px 3px rgba(15, 23, 42, 0.04);
  padding: 12mm 13mm; line-height: var(--paper-lh, 1.55);
  -webkit-print-color-adjust: exact; print-color-adjust: exact;
  border-radius: 6px; position: relative; overflow: hidden;
}
.flow.keywrap { break-before: page; }

/* 卷头：包含学校、妮妮姓名与做题信息 */
.sheet-head { border-bottom: 2px solid var(--ink); padding-bottom: 3px; margin-bottom: 4px; }
.school-tag { font-size: .60em; font-weight: 700; color: #1e3a8a; letter-spacing: 0.04em; text-transform: uppercase; margin-bottom: 1px; }
.sheet-head .title {
  font-size: 1.0em; font-weight: 800; display: flex;
  align-items: baseline; justify-content: space-between; gap: 8px;
}
.sheet-head .fill { font-size: .64em; font-weight: 500; color: #334155; white-space: nowrap; }
.sheet-head .fill u { text-decoration: underline; text-underline-offset: 3px; }
.sheet-head .sub { font-size: .56em; color: #64748b; margin-top: 1px; line-height: 1.3; }
.goal { font-size: .54em; color: #64748b; margin: 2px 0 4px; line-height: 1.4; background: #f8fafc; padding: 2px 8px; border-radius: 4px; }
.p2head { break-before: page; margin-top: 6mm; }

h3.sec {
  font-size: .78em; font-weight: 700; margin: 4px 0 2px; padding-left: 6px;
  border-left: 3.5px solid var(--accent); color: #0f172a;
}
h3.sec small { font-weight: 400; font-size: .8em; color: #64748b; }

/* 题格系统：4列排版，严格约束列宽与行高，保证48题单页完美容纳 */
.grid {
  display: grid; grid-template-columns: repeat(var(--cols, 4), minmax(0, 1fr));
  column-gap: 3.5mm; row-gap: 1.2mm; width: 100%; box-sizing: border-box;
}
.grid .item {
  display: flex; align-items: center; min-height: 11mm; border-bottom: 1px dotted #e2e8f0;
  font-size: 1em; page-break-inside: avoid; position: relative; box-sizing: border-box;
  min-width: 0; padding-right: 2px; cursor: pointer; transition: background-color .1s, border-color .1s;
}
.grid .item:hover { background-color: #f8fafc; }
.item.wide { grid-column: span 2; }
.item.full { grid-column: 1 / -1; }
.item .no {
  font-size: .64em; color: #94a3b8; width: 2.1em; flex: none; font-weight: 600;
  user-select: none;
}
.item .q {
  display: inline-flex; align-items: center; white-space: nowrap;
  font-weight: 500; letter-spacing: -0.01em; flex: 1; min-width: 0;
}

/* 运算符号与书写留空 (彻底摒弃方块 □) */
.op-eq { margin: 0 1px; font-weight: 600; }
.write-line {
  display: inline-block; min-width: 36px; width: 40px; border-bottom: 1.8px solid #0f172a;
  height: 1.1em; vertical-align: baseline; margin-left: 2px; text-align: center;
}
.write-line.filled { border-bottom-color: #3b82f6; }
.blank-paren {
  display: inline-flex; align-items: center; font-weight: 600; letter-spacing: 0; color: #0f172a;
}
.write-blank-inner {
  display: inline-block; min-width: 20px; text-align: center;
}
.cmp-circle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.15em; height: 1.15em; border: 1.5px solid #0f172a; border-radius: 50%;
  font-size: 0.85em; margin: 0 3px; vertical-align: middle;
}
.cmp-circle-ans {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.15em; height: 1.15em; border: 1.5px solid var(--accent); border-radius: 50%;
  font-size: 0.85em; font-weight: 700; color: var(--accent); margin: 0 3px; vertical-align: middle;
}

.ans-inline { font-size: 0.88em; font-weight: 700; color: var(--accent); }
.item .star { color: var(--warn); font-size: .68em; margin-left: 3px; font-weight: 700; }

/* 标记组：浮动定位在题目右上角，绝对不占用题目水平行宽！ */
.item .tag-group {
  position: absolute; top: 1px; right: 2px; display: inline-flex; gap: 2px;
  pointer-events: none; z-index: 2;
}
.item .tag, .witem .tag {
  font-size: 9px; line-height: 1; padding: 1px 4px; border-radius: 4px;
  vertical-align: middle; font-weight: 600;
}
.tag.rev { background: #e0f2fe; color: #0369a1; }
.tag.refr { background: #fef3c7; color: #92400e; }
.tag.reinf { background: #fee2e2; color: #b91c1c; border: 1px solid #fca5a5; }
.hide-tags .tag-group { display: none !important; }

.item .ans { font-size: .82em; color: var(--accent); margin-left: 6px; font-weight: 700; white-space: nowrap; }

/* 批改状态：默认正常，点一下红错，再点取消 */
.item.bad, .witem.bad {
  background: #fef2f2 !important;
  border-bottom: 1.5px solid #f87171 !important;
}
.item.bad .write-line {
  border-bottom-color: #ef4444 !important;
}
.item.bad .no {
  color: #ef4444 !important;
  font-weight: 700;
}
.item.bad::after {
  content: '✕';
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  font-weight: 900;
  color: #dc2626;
  pointer-events: none;
  background: #fee2e2;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* 批改状态 */
.item.ok { background: #f0fdf4; }
.item.bad, .witem.bad { background: #fef2f2; }
.item .mark { cursor: pointer; }

/* 例题提示条 */
.explain {
  font-size: .64em; color: #1e3a8a; background: #eff6ff; border-left: 3px solid #60a5fa;
  padding: 4px 10px; margin: 0 0 6px; border-radius: 0 6px 6px 0; line-height: 1.5;
}

/* ---------- 读题解决问题区 (科学脚手架与手写区) ---------- */
.readsteps {
  font-size: .6em; color: #334155; background: #f8fafc; border: 1px solid #e2e8f0;
  border-radius: 6px; padding: 5px 10px; margin-bottom: 7px; display: flex; gap: 14px; flex-wrap: wrap;
}
.readsteps b { color: var(--accent); }
.wordcard {
  font-size: .58em; background: #fffbeb; border: 1px dashed #fcd34d;
  border-radius: 6px; padding: 5px 10px; margin-bottom: 8px;
}
.wordcard .wc { display: inline-block; margin: 2px 10px 2px 0; }
.wordcard b { color: #92400e; }
.wordcard i { font-style: normal; color: #78350f; margin-left: 3px; }

.wordlist .witem {
  min-height: 16mm; border-bottom: 1px solid #e2e8f0;
  padding: 2.5mm 0 2mm; page-break-inside: avoid;
}
.witem .wline { display: flex; align-items: baseline; font-size: 1.02em; line-height: 1.6; }
.witem .no { font-size: .62em; color: #94a3b8; width: 2em; flex: none; font-weight: 600; }
.witem .wq { flex: 1; }
.witem .witem-body { display: flex; gap: 12px; align-items: center; margin-top: 2mm; }
.word-write-area { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.line-write { display: flex; align-items: center; font-size: .68em; color: #334155; }
.line-write .lbl { width: 3.5em; font-weight: 600; }
.work-line { flex: 1; border-bottom: 1.2px solid #0f172a; height: 1.2em; }
.work-ans-paren { font-weight: 600; letter-spacing: 2px; }

svg.bar { width: 38mm; height: auto; flex: none; }
svg.ten-frame { height: 20mm; width: auto; flex: none; }
.choices { margin: 1mm 0 0 2em; font-size: .78em; display: flex; gap: 14px; flex-wrap: wrap; }
.ch b { color: var(--accent); }
.witem .sans { font-size: .64em; color: var(--accent); margin-top: 1mm; font-weight: 600; }
b.kw { font-weight: 700; color: #1e3a8a; border-bottom: 2px solid #fde047; padding-bottom: 1px; }
rt { font-size: .44em; color: #64748b; font-weight: 500; }

.sheet-foot { font-size: .56em; color: #64748b; margin-top: 12px; padding-top: 4px; border-top: 1px solid #e2e8f0; }

/* ---------- 识字卡 ---------- */
.zgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3mm; margin: 4mm 0; }
.zcard {
  border: 1px solid #cbd5e1; border-radius: 8px; padding: 3.5mm 4mm;
  min-height: 28mm; page-break-inside: avoid; background: #fff;
}
.zcard .zw { font-size: 1.05em; font-weight: 700; color: #0f172a; }
.zcard .zw rt { font-size: .45em; color: #64748b; font-weight: 500; }
.zcard .zs { font-size: .62em; color: #334155; margin-top: 1.2mm; line-height: 1.6; }
.zcard .zt {
  font-size: .55em; color: #64748b; margin-top: 1.5mm; display: flex;
  align-items: center; gap: 5px;
}
.zcard .tick {
  display: inline-block; width: 3.6mm; height: 3.6mm;
  border: 1.2px solid #94a3b8; border-radius: 2px;
}
.zquant { font-size: .6em; color: #334155; background: #f8fafc; border-radius: 6px; padding: 5px 10px; margin-top: 4mm; }
.zfoot { font-size: .58em; color: #64748b; margin-top: 3mm; line-height: 1.6; }
.zgrid.screen .zcard { background: #ffffff; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.zsub { font-size: .82em; margin: 12px 0 4px; color: #334155; font-weight: 700; }

/* ---------- 错题本标签页 (满足需求 5) ---------- */
.error-page-header {
  display: flex; justify-content: space-between; align-items: center;
  background: #ffffff; border: 1px solid #e2e8f0; border-radius: 12px;
  padding: 14px 18px; margin-bottom: 16px;
}
.error-stats-text { font-size: 14px; color: #334155; }
.error-stats-text b { color: var(--danger); font-size: 18px; }
.error-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }
.error-card {
  background: #ffffff; border: 1px solid #e2e8f0; border-radius: 10px;
  padding: 12px 14px; position: relative; transition: box-shadow .15s;
}
.error-card:hover { box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.error-card.resolved { opacity: 0.6; background: #f8fafc; }
.error-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.error-cause-badge {
  font-size: 11px; padding: 2px 7px; border-radius: 10px;
  background: #fee2e2; color: #b91c1c; font-weight: 600;
}
.error-date { font-size: 11px; color: #94a3b8; }
.error-prompt { font-size: 16px; font-weight: 700; color: #0f172a; margin: 4px 0; }
.error-ans { font-size: 13px; color: var(--accent); font-weight: 600; }
.error-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 8px; }

/* ---------- 读题练习页 ---------- */
.readingpage h3 { font-size: 1.1em; margin: 0 0 4px; font-weight: 700; color: #0f172a; }
.readingpage .rule { font-size: .68em; color: #475569; line-height: 1.6; }
.ritem {
  border: 1px solid #e2e8f0; border-radius: 12px; padding: 14px 16px;
  margin: 12px 0; background: #ffffff; box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.rtext { font-size: 1.15em; line-height: 2.5; color: #0f172a; }
.rrow { display: flex; gap: 16px; align-items: flex-start; margin-top: 10px; }
.rask { flex: 1; font-size: .7em; display: flex; flex-direction: column; gap: 6px; }
.rask label { display: flex; align-items: center; color: #334155; }
.fillin {
  flex: 1; padding: 4px 8px; border: none; border-bottom: 1.5px solid #cbd5e1;
  font: inherit; font-size: 14px; margin-left: 6px; background: transparent;
}
.fillin:focus { border-bottom-color: var(--accent); outline: none; }
.fillin.short { flex: none; width: 80px; text-align: center; }
.rans { font-size: .66em; color: var(--accent); margin-top: 8px; font-weight: 600; }
.speak { font-size: 12px; padding: 4px 12px; border-radius: 6px; display: inline-flex; align-items: center; gap: 4px; }
.empty { color: #64748b; font-size: 13px; padding: 20px 0; text-align: center; }

/* ---------- 云端部署与同步卡片 (满足需求 4) ---------- */
.cloud-status-card {
  background: #ffffff; border: 1px solid #e2e8f0; border-radius: 12px;
  padding: 16px 20px; margin-bottom: 16px;
}
.cloud-pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px;
  border-radius: 16px; font-size: 12.5px; font-weight: 600; margin-bottom: 8px;
}
.cloud-pill.connected { background: #dcfce7; color: #15803d; }
.cloud-pill.local { background: #fef3c7; color: #b45309; }
.cloud-pill.unbound { background: #fee2e2; color: #b91c1c; }
.deploy-steps {
  display: flex; flex-direction: column; gap: 12px; margin-top: 14px;
}
.step-item {
  background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px;
  padding: 12px 14px; font-size: 13.5px;
}
.step-item h4 { margin: 0 0 6px; font-size: 14px; color: #0f172a; display: flex; align-items: center; gap: 6px; }
.step-item code {
  background: #e2e8f0; padding: 2px 6px; border-radius: 4px; font-size: 12px; font-family: monospace;
}

/* ---------- 批改悬浮条 (默认正确，点错标红，无多余标签) ---------- */
.markbar {
  position: sticky; bottom: 0; background: #ffffff; border-top: 1px solid var(--line);
  padding: 10px 18px; display: flex; gap: 14px; align-items: center; font-size: 13.5px;
  box-shadow: 0 -4px 16px rgba(0,0,0,0.07); flex-wrap: wrap; z-index: 100;
}
.markbar-tip {
  display: flex; align-items: center; gap: 6px; color: #334155; font-size: 13px;
}
.markbar-icon { font-size: 16px; }
.markbar-stats {
  display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: #475569;
  background: #f8fafc; padding: 4px 12px; border-radius: 20px; border: 1px solid #e2e8f0;
}
.markbar-stats .sep { color: #cbd5e1; }
.markbar-stats .text-danger { color: #dc2626; font-weight: 800; font-size: 15px; }
.markbar-stats .text-success { color: #16a34a; font-weight: 800; font-size: 15px; }
.markbar-stats .text-primary { color: #2563eb; font-weight: 800; font-size: 15px; }
.markbar-actions {
  display: flex; align-items: center; gap: 8px; margin-left: auto;
}
.btn-subtle {
  background: #f8fafc; border: 1px solid var(--line); color: #475569;
  padding: 6px 12px; border-radius: 6px; font-size: 12.5px; cursor: pointer;
}
.btn-subtle:hover { background: #f1f5f9; color: #0f172a; }

/* 字号快捷按钮组 */
.font-input-box {
  display: flex; gap: 6px; align-items: center; margin-top: 2px;
}
.font-pill-row, .font-controls {
  display: flex; gap: 2px; align-items: center;
}
.font-controls {
  background: #f1f5f9; padding: 2px 4px; border-radius: 6px; font-size: 12px; color: #64748b;
}
.btn-preset, .btn-font-pt {
  border: 1px solid var(--line); background: #f8fafc; color: #475569;
  padding: 3px 6px; border-radius: 4px; font-size: 11.5px; cursor: pointer;
  transition: all .12s;
}
.btn-preset:hover, .btn-font-pt:hover {
  background: #f1f5f9; border-color: #94a3b8;
}
.btn-preset.active, .btn-font-pt.active {
  background: var(--accent); color: #ffffff; border-color: var(--accent); font-weight: 700;
}

/* 批改成绩完成弹窗 */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(15,23,42,0.6);
  display: flex; align-items: center; justify-content: center; z-index: 999;
}
.modal-card {
  background: #ffffff; border-radius: 16px; padding: 24px 28px; width: 420px; max-width: 90%;
  text-align: center; box-shadow: 0 20px 40px rgba(0,0,0,0.2); animation: popUp .2s ease-out;
}
@keyframes popUp { from { transform: scale(0.9); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-stars { font-size: 36px; margin: 10px 0; }
.modal-title { font-size: 20px; font-weight: 800; color: #0f172a; }
.modal-msg { font-size: 14px; color: #475569; margin: 8px 0 16px; line-height: 1.6; }

/* ---------- 图谱页 ---------- */
.graphwrap { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; }
.gcanvas { background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 8px; overflow: auto; }
#graphSvg svg text { pointer-events: none; }
.gn { cursor: pointer; } .gn:hover rect { stroke: var(--accent); }
#graphDetail { flex: 1; min-width: 280px; background: #fff; border: 1px solid var(--line); border-radius: 9px; padding: 12px 14px; font-size: 13px; }
#graphDetail .kv { margin: 5px 0; color: #465972; }
#graphDetail i { font-style: normal; color: #93a2b6; font-size: 11px; }

/* ---------- 统计 / 家长指南 ---------- */
.mrow { display: flex; align-items: center; gap: 8px; font-size: 12.5px; margin: 4px 0; }
.mn { width: 150px; } .mv { width: 84px; color: #6b7c93; font-size: 11.5px; }
.mbar { flex: 1; height: 7px; background: #eef2f7; border-radius: 5px; overflow: hidden; }
.mbar i { display: block; height: 100%; background: var(--accent); }
.badge { font-size: 10.5px; padding: 1px 6px; border-radius: 9px; }
.badge.ok { background: #eaf4ec; color: #2c7a3f; } .badge.warn { background: #fdf0e6; color: #a15a1f; }
.chip { display: inline-block; background: #e8f0ff; color: #1a3f7a; border-radius: 14px; padding: 3px 10px; font-size: 12px; margin: 4px 5px 0 0; }
.chip i { font-style: normal; color: #7c8ba1; margin-left: 5px; font-size: 10.5px; }
.bk { font-size: 12.5px; background: #fff6f2; border-left: 3px solid var(--warn); padding: 6px 9px; border-radius: 0 6px 6px 0; margin: 6px 0; }
.bk i { font-style: normal; color: #a15a1f; font-size: 11px; }
#statLine { font-size: 12px; color: #6b7c93; margin-top: 8px; }
.dim { color: #93a2b6; font-size: 12.5px; }

.guide { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 16px 20px; max-width: 860px; font-size: 14px; }
.guide h2 { font-size: 16px; margin: 18px 0 6px; }
.guide h2:first-child { margin-top: 0; }
.guide ol, .guide ul { padding-left: 20px; }
.guide li { margin: 5px 0; }
.guide .ev { color: #7c8ba1; font-size: 12px; }
.guide .s { color: #2c7a3f; font-weight: 700; font-size: 11px; }
.guide .w { color: #a15a1f; font-weight: 700; font-size: 11px; }
.guide table { border-collapse: collapse; font-size: 12.5px; }
.guide th, .guide td { border: 1px solid #e2e8f1; padding: 4px 8px; text-align: left; }
.guide th { background: #f3f6fb; }
.guide .warn { background: #fff6f2; border-left: 3px solid var(--warn); padding: 8px 12px; border-radius: 0 6px 6px 0; }

/* ---------- 网页试卷预览工具栏 ---------- */
.paper-toolbar {
  background: #ffffff; border: 1px solid var(--line); border-radius: 10px;
  padding: 8px 14px; margin-bottom: 14px; display: flex; align-items: center;
  justify-content: space-between; flex-wrap: wrap; gap: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04); width: 100%; box-sizing: border-box;
}
.toolbar-group { display: flex; align-items: center; gap: 8px; }
.toolbar-title { font-size: 13.5px; font-weight: 700; color: #0f172a; }
.preview-badge {
  font-size: 11px; color: #1e3a8a; background: #eff6ff; border: 1px solid #bfdbfe;
  padding: 2px 7px; border-radius: 12px;
}
.toolbar-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.btn-tool {
  background: #f8fafc; border: 1px solid var(--line); color: #334155;
  padding: 5px 9px; border-radius: 6px; font-size: 12px; font-weight: 500;
  cursor: pointer; transition: all .15s;
}
.btn-tool:hover { background: #f1f5f9; border-color: #cbd5e1; }
.btn-tool.active { background: #eff6ff; border-color: #93c5fd; color: var(--accent); }
.zoom-controls {
  display: flex; align-items: center; gap: 3px; background: #f1f5f9;
  padding: 2px 4px; border-radius: 6px; font-size: 12px; color: #64748b;
}
.btn-zoom {
  border: none; background: transparent; color: #475569;
  padding: 3px 6px; border-radius: 4px; font-size: 11px; cursor: pointer;
}
.btn-zoom.active {
  background: #ffffff; color: #0f172a; font-weight: 700;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.btn-print-quick {
  background: var(--accent); color: #ffffff; border: none;
  padding: 5px 12px; border-radius: 6px; font-size: 12.5px; font-weight: 600;
  cursor: pointer; display: flex; align-items: center; gap: 4px;
}
.btn-print-quick:hover { background: var(--accent-hover); }

@media (max-width: 1250px) {
  .app { grid-template-columns: 320px 1fr; }
}
@media (max-width: 1050px) {
  .app { grid-template-columns: 1fr; }
  .side { max-height: none; }
  .main { max-height: none; }
}

/* ================= 打印 ================= */
@media print {
  body { background: #fff; }
  .app { display: block; }
  .side, .tabs, .no-print, .no-print-off, .markbar, .readwrap, .speak, #graphDetail, .modal-overlay, .paper-toolbar, .tag-group { display: none !important; }
  .main { padding: 0; max-height: none; overflow: visible; }
  .paper-preview-container { padding: 0; overflow: visible; }
  .stack { gap: 0; align-items: stretch; transform: none !important; }
  .flow { width: auto; min-width: 0; box-shadow: none; padding: 0; overflow: visible; border: none; border-radius: 0; }
  .flow.keywrap, .p2head { break-before: page; }
  .item, .witem { break-inside: avoid; }
  .grid .item { border-bottom-color: #cbd5e1; }
  .wordlist .witem { min-height: 15mm; }
  .grid .item { min-height: 12.8mm; }
  table.key { font-size: 9pt; }
  .item .ans, .witem .sans { color: #2563eb; }
}
@page { size: A4; margin: 12mm 13mm; }