/* 法考刷题 · 样式 (移动优先，自适配 Windows/安卓/iPad，明暗双主题) */
:root{
  --bg:#f4f5f7; --card:#ffffff; --ink:#1c1e26; --ink2:#5b6072; --line:#e7e9f0;
  --brand:#4f46e5; --brand2:#6366f1; --brandink:#ffffff;
  --ok:#16a34a; --okbg:#eafaef; --no:#dc2626; --nobg:#fdecec; --warn:#c2760a;
  --chip:#eef0fb; --shadow:0 1px 3px rgba(20,20,50,.06),0 6px 20px rgba(20,20,50,.05);
  --r:14px;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#0f1117; --card:#181b24; --ink:#eceef5; --ink2:#9aa0b4; --line:#262a37;
    --brand:#6d63ff; --brand2:#7c73ff; --chip:#232636; --okbg:#12291b; --nobg:#2a1618;
    --shadow:0 1px 3px rgba(0,0,0,.4),0 8px 24px rgba(0,0,0,.3); }
}
*{ box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
html,body{ margin:0; padding:0; }
body{ background:var(--bg); color:var(--ink); font:15px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  padding-bottom:calc(64px + env(safe-area-inset-bottom)); }
b{ font-weight:700; }
button{ font-family:inherit; cursor:pointer; }

/* 顶栏 */
.topbar{ position:sticky; top:0; z-index:20; display:flex; align-items:center; justify-content:space-between;
  padding:12px 16px; padding-top:calc(12px + env(safe-area-inset-top)); background:var(--card); border-bottom:1px solid var(--line); }
.brand{ font-weight:800; font-size:17px; letter-spacing:.02em; }
.icon-btn{ border:0; background:transparent; font-size:20px; }

#view{ max-width:680px; margin:0 auto; padding:16px; }
.loading{ text-align:center; color:var(--ink2); padding:40px; }

/* 底部导航 */
.bottomnav{ position:fixed; left:0; right:0; bottom:0; z-index:20; display:flex; background:var(--card);
  border-top:1px solid var(--line); padding-bottom:env(safe-area-inset-bottom); }
.nav-item{ flex:1; text-align:center; padding:8px 0 10px; font-size:11px; color:var(--ink2); text-decoration:none; }
.nav-item span{ display:block; font-size:20px; line-height:1.3; filter:grayscale(.3); }
.nav-item.active{ color:var(--brand); font-weight:700; }
.nav-item.active span{ filter:none; }

/* 卡片/通用 */
.card{ background:var(--card); border:1px solid var(--line); border-radius:var(--r); padding:16px; margin:12px 0; box-shadow:var(--shadow); }
.card-h{ font-weight:700; margin-bottom:10px; font-size:14px; }
.muted{ color:var(--ink2); } .small{ font-size:12.5px; }
.row{ display:flex; gap:8px; flex-wrap:wrap; margin-top:8px; }

.btn{ border:1px solid var(--line); background:var(--card); color:var(--ink); border-radius:10px; padding:10px 14px; font-size:14px; font-weight:600; }
.btn.primary{ background:linear-gradient(135deg,var(--brand),var(--brand2)); color:var(--brandink); border:0; }
.btn.ghost{ background:var(--chip); border:0; color:var(--ink); }
.btn.big{ width:100%; padding:14px; font-size:15px; margin-top:8px; }
.btn.tiny{ padding:6px 10px; font-size:12.5px; border-radius:8px; }
.btn.danger{ color:var(--no); border-color:var(--no); background:transparent; }
.btn:active{ transform:translateY(1px); }

/* 首页 hero */
.hero{ background:linear-gradient(140deg,var(--brand),var(--brand2)); color:#fff; border-radius:18px; padding:18px; box-shadow:var(--shadow); }
.hero-top{ display:flex; justify-content:space-between; align-items:flex-start; }
.hero-title{ font-size:22px; font-weight:800; }
.hero-sub{ opacity:.85; font-size:13px; margin-top:2px; }
.streak{ text-align:center; background:rgba(255,255,255,.16); border-radius:12px; padding:6px 12px; }
.streak-num{ font-size:24px; font-weight:800; } .streak-lbl{ font-size:11px; opacity:.85; }
.hero-stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:8px; margin:16px 0 4px; }
.hs{ background:rgba(255,255,255,.14); border-radius:10px; padding:8px 4px; text-align:center; }
.hs-v{ font-size:18px; font-weight:800; } .hs-l{ font-size:10.5px; opacity:.9; }
.hero-actions{ display:flex; gap:8px; margin-top:12px; }
.hero-actions .btn{ margin-top:0; }
.hero-actions .primary{ background:#fff; color:var(--brand); }
.hero-actions .ghost{ background:rgba(255,255,255,.16); color:#fff; }
.hero-actions .ghost b{ background:rgba(0,0,0,.15); border-radius:8px; padding:0 6px; margin-left:4px; }

/* 科目列表 */
.subj-list{ display:flex; flex-direction:column; gap:2px; }
.subj-row{ display:grid; grid-template-columns:auto 1fr; gap:2px 10px; align-items:center; background:transparent; border:0; border-radius:10px; padding:10px 8px; text-align:left; color:var(--ink); }
.subj-row:hover{ background:var(--chip); }
.subj-name{ font-weight:700; grid-row:1; }
.subj-meta{ grid-column:2; grid-row:1; text-align:right; font-size:12px; color:var(--ink2); }
.subj-bar{ grid-column:1/3; grid-row:2; height:5px; background:var(--line); border-radius:4px; overflow:hidden; }
.subj-bar i{ display:block; height:100%; background:var(--brand); }

.chips{ display:flex; flex-wrap:wrap; gap:8px; }
.chip{ border:1px solid var(--line); background:var(--card); border-radius:20px; padding:8px 14px; font-size:13px; color:var(--ink); }
.chip:hover{ border-color:var(--brand); color:var(--brand); }
.chip.on{ background:var(--brand); color:#fff; border-color:var(--brand); }
.chip em{ font-style:normal; opacity:.65; margin-left:5px; font-size:11px; }
.pick-subj, .pick-count, .pick-type{ margin-bottom:10px; }
.ck{ display:flex; align-items:center; gap:8px; margin:6px 2px 12px; font-size:13.5px; color:var(--ink2); }
.ck input{ width:18px; height:18px; }

/* 子页头 */
.subhead{ display:flex; align-items:center; gap:12px; margin:6px 2px 12px; }
.subhead h2{ font-size:18px; margin:0; }
.back{ border:0; background:var(--chip); border-radius:8px; padding:6px 10px; color:var(--ink); font-weight:600; }

.ch-list{ display:flex; flex-direction:column; }
.ch-row{ display:flex; justify-content:space-between; align-items:center; gap:10px; border:0; border-bottom:1px solid var(--line); background:transparent; padding:12px 4px; text-align:left; color:var(--ink); }
.ch-row:last-child{ border-bottom:0; }
.ch-row em{ font-style:normal; color:var(--ink2); font-size:12px; background:var(--chip); border-radius:20px; padding:2px 8px; }

/* 做题 */
.quizbar{ display:flex; align-items:center; gap:10px; margin:2px 0 14px; }
.quizbar .back{ font-size:16px; }
.qprog{ flex:1; height:7px; background:var(--line); border-radius:5px; overflow:hidden; }
.qprog i{ display:block; height:100%; background:linear-gradient(90deg,var(--brand),var(--brand2)); transition:width .25s; }
.qcount{ font-size:12.5px; color:var(--ink2); font-variant-numeric:tabular-nums; }
.qmeta{ display:flex; gap:6px; flex-wrap:wrap; margin-bottom:10px; }
.tag{ font-size:11.5px; background:var(--chip); color:var(--ink2); border-radius:6px; padding:2px 8px; font-weight:600; }
.tag.subj{ background:var(--brand); color:#fff; }
.tag.hint{ background:#e0f2fe; color:#0369a1; }
.tag.warn{ background:#fef3cd; color:var(--warn); }
.tag.mini{ font-size:10px; padding:1px 5px; }
.stem{ font-size:16.5px; line-height:1.7; font-weight:500; margin:6px 2px 16px; white-space:pre-wrap; }

.opts{ display:flex; flex-direction:column; gap:10px; }
.opt{ display:flex; gap:12px; align-items:flex-start; width:100%; text-align:left; background:var(--card); border:1.5px solid var(--line); border-radius:12px; padding:13px 14px; color:var(--ink); font-size:15px; line-height:1.55; }
.opt:hover:not(:disabled){ border-color:var(--brand2); }
.opt-k{ flex:none; width:26px; height:26px; border-radius:50%; background:var(--chip); color:var(--ink2); font-weight:700; display:flex; align-items:center; justify-content:center; font-size:13px; }
.opt-t{ flex:1; padding-top:1px; }
.opt.sel{ border-color:var(--brand); background:color-mix(in srgb,var(--brand) 8%,var(--card)); }
.opt.sel .opt-k{ background:var(--brand); color:#fff; }
.opt.correct{ border-color:var(--ok); background:var(--okbg); }
.opt.correct .opt-k{ background:var(--ok); color:#fff; }
.opt.wrong{ border-color:var(--no); background:var(--nobg); }
.opt.wrong .opt-k{ background:var(--no); color:#fff; }
.opt:disabled{ opacity:1; cursor:default; }
.qactions{ margin-top:14px; display:flex; gap:10px; align-items:center; }
.qactions .btn{ margin-top:0; }
.qactions .btn.big{ width:auto; flex:1; }
.qactions #prev{ flex:none; }

/* 判分反馈 */
.fb{ margin-top:16px; border-radius:12px; border:1px solid var(--line); overflow:hidden; }
.fb.ok{ border-color:var(--ok); } .fb.no{ border-color:var(--no); }
.fb-head{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:6px; padding:11px 14px; font-weight:800; }
.fb.ok .fb-head{ background:var(--okbg); color:var(--ok); } .fb.no .fb-head{ background:var(--nobg); color:var(--no); }
.fb-ans{ font-weight:600; color:var(--ink2); font-size:13px; } .fb-ans b{ color:var(--ink); }
.fb-block{ border-top:1px solid var(--line); padding:12px 14px; }
.fb-block summary{ font-weight:700; cursor:pointer; font-size:14px; list-style:none; }
.fb-block summary::-webkit-details-marker{ display:none; }
.fb-block summary::before{ content:"▸ "; color:var(--brand); }
.fb-block[open] summary::before{ content:"▾ "; }
.rich{ margin-top:8px; color:var(--ink); font-size:14px; line-height:1.75; }
.ktbl-wrap{ overflow-x:auto; margin:8px 0; -webkit-overflow-scrolling:touch; }
.ktbl{ border-collapse:collapse; font-size:12.5px; min-width:100%; }
.ktbl th, .ktbl td{ border:1px solid var(--line); padding:5px 9px; text-align:left; vertical-align:top; line-height:1.55; }
.ktbl th{ background:var(--chip); font-weight:700; }
.ai .rich{ background:var(--chip); border-radius:10px; padding:10px; }
.fb-tools{ padding:10px 14px; border-top:1px solid var(--line); }

/* 知识点 */
.kp{ margin-top:10px; padding:10px; background:var(--chip); border-radius:10px; }
.kp-h{ display:flex; align-items:center; gap:6px; }
.kp-h b{ font-size:14.5px; }
.kp-sum{ margin-top:6px; font-size:13.5px; color:var(--ink); }
.kp-sec{ margin-top:8px; font-size:12px; color:var(--ink2); font-weight:700; }
.kp-pts{ margin:4px 0 0; padding-left:18px; font-size:13px; }
.kp-pts li{ margin:2px 0; }
.kp-pts.traps li{ color:var(--warn); }
.kp-mnem{ margin-top:8px; padding:8px 10px; background:color-mix(in srgb,var(--brand) 12%,var(--card)); border-left:3px solid var(--brand); border-radius:8px; font-size:13px; font-weight:600; }
.tag.mini.ai{ background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; }
.kp-src{ margin-top:8px; border-top:1px dashed var(--line); padding-top:8px; }
.kp-src summary{ font-size:12.5px; color:var(--ink2); cursor:pointer; font-weight:600; }
.kp-src .rich{ font-size:12.5px; color:var(--ink2); margin-top:6px; }
.kchips{ display:flex; flex-wrap:wrap; gap:6px; margin-top:5px; }
.kchip{ font-size:12px; background:var(--card); border:1px solid var(--line); border-radius:14px; padding:2px 9px; }
.kchip.alt{ color:var(--brand); border-color:color-mix(in srgb,var(--brand) 30%,var(--line)); }

/* 结算 */
.summary{ text-align:center; }
.sm-score{ padding:26px 0; }
.sm-big{ font-size:44px; font-weight:800; color:var(--brand); }
.sm-lbl{ color:var(--ink2); margin-top:4px; }
.sm-actions .btn{ margin-top:10px; }
.sm-row{ text-align:left; padding:8px 4px; border-bottom:1px solid var(--line); font-size:13.5px; }
.sm-row:last-child{ border:0; }

/* 错题本 */
.wb-list{ display:flex; flex-direction:column; gap:10px; }
.wb{ background:var(--card); border:1px solid var(--line); border-radius:12px; padding:12px; box-shadow:var(--shadow); }
.wb-h{ display:flex; align-items:center; gap:6px; margin-bottom:6px; }
.wb-del{ margin-left:auto; border:0; background:transparent; color:var(--no); font-size:12.5px; }
.wb-stem{ font-size:14px; line-height:1.6; }
.wb-ans{ margin-top:6px; font-size:12.5px; color:var(--ink2); }
.wsel{ color:var(--no); }
.wb-note{ margin-top:6px; font-size:12.5px; background:var(--chip); border-radius:8px; padding:6px 8px; }
.empty{ text-align:center; color:var(--ink2); padding:40px; }

/* 统计 */
.kpis{ display:grid; grid-template-columns:repeat(4,1fr); gap:8px; }
.kpis .hs{ background:var(--chip); color:var(--ink); }
.kpis .hs-v{ color:var(--brand); }
.st-list{ display:flex; flex-direction:column; gap:9px; }
.st-row{ display:grid; grid-template-columns:64px 1fr 54px 46px; gap:8px; align-items:center; font-size:12.5px; }
.st-name{ font-weight:700; }
.st-bar{ height:8px; background:var(--line); border-radius:5px; overflow:hidden; }
.st-bar .cov{ display:block; height:100%; background:var(--brand); }
.st-num{ text-align:right; color:var(--ink2); font-variant-numeric:tabular-nums; }
.st-acc{ text-align:right; font-weight:700; }
.calrow{ display:flex; gap:5px; }
.cal{ flex:1; height:26px; border-radius:5px; background:var(--line); }
.cal.on{ background:var(--brand); }

/* 设置 */
.seg{ display:flex; background:var(--chip); border-radius:10px; padding:3px; margin-bottom:12px; }
.seg-btn{ flex:1; border:0; background:transparent; padding:8px; border-radius:8px; font-weight:600; color:var(--ink2); }
.seg-btn.on{ background:var(--card); color:var(--brand); box-shadow:var(--shadow); }
.fld{ display:block; margin:8px 0; }
.fld span{ display:block; font-size:12.5px; color:var(--ink2); margin-bottom:4px; }
.fld input{ width:100%; padding:10px; border:1px solid var(--line); border-radius:10px; background:var(--bg); color:var(--ink); font-size:14px; }
.about{ text-align:center; }
.sync-on{ font-weight:800; color:var(--ok); font-size:15px; margin-bottom:2px; }
.linkbtn{ background:none; border:0; color:var(--brand); font-size:13px; padding:8px 0 0; margin-top:4px; }
.linkrow{ display:flex; gap:18px; align-items:center; margin-top:4px; }
#last-sync{ margin-top:8px; }

/* Modal */
.modal{ position:fixed; inset:0; z-index:50; display:flex; align-items:center; justify-content:center; padding:16px; }
.modal-bg{ position:absolute; inset:0; background:rgba(0,0,0,.5); }
.modal-box{ position:relative; background:var(--card); border-radius:16px; max-width:640px; width:100%; max-height:86vh; overflow:auto; padding:18px; box-shadow:var(--shadow); }
.modal-x{ position:absolute; right:12px; top:12px; border:0; background:var(--chip); border-radius:8px; width:30px; height:30px; }

/* Toast */
.toast{ position:fixed; left:50%; bottom:calc(80px + env(safe-area-inset-bottom)); transform:translateX(-50%) translateY(20px);
  background:#111827; color:#fff; padding:10px 16px; border-radius:10px; font-size:13.5px; opacity:0; pointer-events:none; transition:.25s; z-index:60; max-width:80%; text-align:center; }
.toast.show{ opacity:.96; transform:translateX(-50%) translateY(0); }

/* 桌面(Windows/iPad 横屏)：更宽留白 */
@media(min-width:900px){
  #view{ max-width:760px; padding-top:24px; }
  .opt{ font-size:15.5px; }
}