/* =========================================================
   CET-4 循环记忆 · 设计系统
   主题：纯白 / 纯黑 / 跟随系统    强调色：蓝 / 青 / 紫 / 琥珀
   ========================================================= */
:root{
  --radius: 14px;
  --radius-sm: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --sidebar-w: 216px;
  --t: .16s ease;
  --good: #16a34a;
  --bad: #dc2626;
  --warn: #d97706;
}

/* ---------------- 纯白 ---------------- */
html[data-theme="light"]{
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f6f7f9;
  --surface-3: #eef0f3;
  --line: #e6e8ec;
  --line-soft: #eff1f4;
  --txt: #0d1117;
  --txt-2: #3d4553;
  --muted: #79828f;
  --good: #15803d;
  --bad: #d32f2f;
  --warn: #b45309;
  --shadow: 0 1px 2px rgba(16,24,40,.04);
  color-scheme: light;
}
/* ---------------- 纯黑 ---------------- */
html[data-theme="dark"]{
  --bg: #000000;
  --surface: #0b0b0d;
  --surface-2: #141417;
  --surface-3: #1c1c20;
  --line: #26262b;
  --line-soft: #1d1d21;
  --txt: #f5f6f8;
  --txt-2: #c6cad3;
  --muted: #82889a;
  --good: #34d399;
  --bad: #f87171;
  --warn: #fbbf24;
  --shadow: none;
  color-scheme: dark;
}

/* ---------------- 强调色 ----------------
   按色相排列：红 → 橙 → 琥珀 → 绿 → 青 → 蓝 → 紫 → 粉，每个色相「标准 / 淡」两档
   --accent        大面积填充（按钮底、标签底、开关）
   --accent-strong 文字 / 细线 / 进度条 / 图表（淡色档用饱和版，保证可读）
   --accent-ink    填充上的文字颜色 */
html[data-accent="red"]{ --accent:#dc2626; --accent-strong:#dc2626; }
html[data-accent="red-soft"]{ --accent:#fca5a5; --accent-strong:#b91c1c; --accent-ink:#450a0a; }
html[data-accent="orange"]{ --accent:#ea580c; --accent-strong:#ea580c; }
html[data-accent="orange-soft"]{ --accent:#fdba74; --accent-strong:#c2410c; --accent-ink:#431407; }
html[data-accent="amber"]{ --accent:#b45309; --accent-strong:#b45309; }
html[data-accent="amber-soft"]{ --accent:#fcd34d; --accent-strong:#92400e; --accent-ink:#3b2205; }
html[data-accent="green"]{ --accent:#15803d; --accent-strong:#15803d; }
html[data-accent="green-soft"]{ --accent:#86efac; --accent-strong:#15803d; --accent-ink:#052e16; }
html[data-accent="teal"]{ --accent:#0d9488; --accent-strong:#0d9488; }
html[data-accent="teal-soft"]{ --accent:#5eead4; --accent-strong:#0f766e; --accent-ink:#042f2e; }
html[data-accent="blue"]{ --accent:#2563eb; --accent-strong:#2563eb; }
html[data-accent="blue-soft"]{ --accent:#93c5fd; --accent-strong:#1d4ed8; --accent-ink:#0b1e45; }
html[data-accent="violet"]{ --accent:#7c3aed; --accent-strong:#7c3aed; }
html[data-accent="violet-soft"]{ --accent:#c4b5fd; --accent-strong:#6d28d9; --accent-ink:#2e1065; }
html[data-accent="pink"]{ --accent:#db2777; --accent-strong:#db2777; }
html[data-accent="pink-soft"]{ --accent:#f9a8d4; --accent-strong:#be185d; --accent-ink:#500724; }

html[data-theme="dark"][data-accent="red"]{ --accent:#f87171; --accent-strong:#f87171; }
html[data-theme="dark"][data-accent="red-soft"]{ --accent:#fca5a5; --accent-strong:#fca5a5; --accent-ink:#1a0a0a; }
html[data-theme="dark"][data-accent="orange"]{ --accent:#fb923c; --accent-strong:#fb923c; }
html[data-theme="dark"][data-accent="orange-soft"]{ --accent:#fdba74; --accent-strong:#fdba74; --accent-ink:#1a0f06; }
html[data-theme="dark"][data-accent="amber"]{ --accent:#fbbf24; --accent-strong:#fbbf24; }
html[data-theme="dark"][data-accent="amber-soft"]{ --accent:#fde68a; --accent-strong:#fde68a; --accent-ink:#1a1405; }
html[data-theme="dark"][data-accent="green"]{ --accent:#4ade80; --accent-strong:#4ade80; }
html[data-theme="dark"][data-accent="green-soft"]{ --accent:#86efac; --accent-strong:#86efac; --accent-ink:#05170c; }
html[data-theme="dark"][data-accent="teal"]{ --accent:#2dd4bf; --accent-strong:#2dd4bf; }
html[data-theme="dark"][data-accent="teal-soft"]{ --accent:#99f6e4; --accent-strong:#99f6e4; --accent-ink:#031715; }
html[data-theme="dark"][data-accent="blue"]{ --accent:#60a5fa; --accent-strong:#60a5fa; }
html[data-theme="dark"][data-accent="blue-soft"]{ --accent:#bfdbfe; --accent-strong:#bfdbfe; --accent-ink:#0a1626; }
html[data-theme="dark"][data-accent="violet"]{ --accent:#a78bfa; --accent-strong:#a78bfa; }
html[data-theme="dark"][data-accent="violet-soft"]{ --accent:#ddd6fe; --accent-strong:#ddd6fe; --accent-ink:#150a26; }
html[data-theme="dark"][data-accent="pink"]{ --accent:#f472b6; --accent-strong:#f472b6; }
html[data-theme="dark"][data-accent="pink-soft"]{ --accent:#fbcfe8; --accent-strong:#fbcfe8; --accent-ink:#21050f; }

html{
  --accent-weak: color-mix(in srgb, var(--accent-strong) 12%, transparent);
  --accent-line: color-mix(in srgb, var(--accent-strong) 40%, var(--line));
  --accent-ink: #ffffff;
  --chart-1: var(--accent-strong);
  --chart-2: color-mix(in srgb, var(--accent-strong) 42%, var(--surface-3));
}
html[data-theme="dark"]{ --accent-ink: #0a0a0a; }

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--txt);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
button{ font-family: inherit; font-size: inherit; color: inherit; background:none; border:none; cursor:pointer; padding:0; }
input, select, textarea{ font-family: inherit; font-size: inherit; color: inherit; }
a{ color: var(--accent-strong); text-decoration:none; }
::selection{ background: var(--accent-weak); }

*::-webkit-scrollbar{ width:8px; height:8px; }
*::-webkit-scrollbar-thumb{ background: var(--surface-3); border-radius: 99px; }
*::-webkit-scrollbar-track{ background: transparent; }

/* ---------------- 骨架 ---------------- */
.app{ display:grid; grid-template-columns: var(--sidebar-w) minmax(0,1fr); min-height:100vh; }
.sidebar{
  position:sticky; top:0; height:100vh;
  display:flex; flex-direction:column;
  padding: 18px 12px 14px;
  border-right:1px solid var(--line);
  background: var(--bg);
}
.brand{ display:flex; align-items:center; gap:9px; padding: 2px 8px 18px; }
.brand-mark{
  width:30px; height:30px; border-radius:9px; flex:0 0 auto;
  display:grid; place-items:center;
  font: 700 12px/1 var(--mono);
  color: var(--accent-ink); background: var(--accent);
  letter-spacing: -.3px;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.25; min-width:0; }
.brand-text strong{ font-size:13px; font-weight:600; letter-spacing:.1px; white-space:nowrap; }
.brand-text span{ display:none; }

.nav{ display:flex; flex-direction:column; gap:1px; }
.nav-item{
  display:flex; align-items:center; gap:9px;
  padding: 8px 10px; border-radius:8px;
  color: var(--txt-2); font-size:13px; text-align:left;
  transition: background var(--t), color var(--t);
}
.nav-item .ico{ width:18px; display:grid; place-items:center; font-size:12.5px; color: var(--muted); }
.nav-item:hover{ background: var(--surface-2); color: var(--txt); }
.nav-item.active{ background: var(--surface-2); color: var(--txt); font-weight:600; }
.nav-item.active .ico{ color: var(--accent-strong); }
.nav-badge{
  margin-left:auto; font-style:normal; font-size:11px; font-weight:600;
  min-width:19px; height:18px; padding:0 5px; border-radius:99px;
  display:grid; place-items:center;
  background: var(--accent); color: var(--accent-ink);
}
.nav-badge[hidden]{ display:none !important; }
.nav-badge.warn{ background: var(--bad); color:#fff; }

.side-foot{ margin-top:auto; padding: 12px 8px 0; border-top:1px solid var(--line-soft); }
.side-foot-row{ display:flex; justify-content:space-between; font-size:11.5px; color:var(--muted); margin-bottom:3px; }
.side-foot-row strong{ color: var(--txt-2); font-variant-numeric: tabular-nums; font-weight:600; }
.side-progress{ height:5px; border-radius:99px; background: var(--surface-3); overflow:hidden; margin:7px 0; }
.side-progress i{ display:block; height:100%; width:0%; border-radius:99px; background: var(--accent-strong); transition: width .4s var(--t); }
.side-tip{ font-size:11px; color:var(--muted); }

.side-account{
  display:flex; align-items:center; gap:8px; margin-top:10px; padding:8px 9px;
  border-radius:9px; border:1px solid var(--line); background: var(--surface);
  font-size:11.5px; width:100%; text-align:left; color: var(--txt-2);
  transition: border-color var(--t);
}
.side-account:hover{ border-color: var(--accent-line); }
.side-account .dot{ width:6px; height:6px; border-radius:99px; background: var(--muted); flex:0 0 auto; }
.side-account .dot.on{ background: var(--good); }
.side-account .dot.sync{ background: var(--warn); }
.side-account span{ overflow:hidden; text-overflow:ellipsis; white-space:nowrap; min-width:0; }

.main{ min-width:0; display:flex; flex-direction:column; }
.topbar{
  position:sticky; top:0; z-index:20;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding: 16px 26px 12px;
  background: var(--bg);
  border-bottom:1px solid var(--line-soft);
}
.topbar-left h1{ margin:0; font-size:17px; font-weight:600; letter-spacing:.1px; }
.topbar-left p{ margin:1px 0 0; font-size:12px; color:var(--muted); }
.topbar-right{ display:flex; align-items:center; gap:7px; }
.chip{
  display:inline-flex; align-items:center; gap:5px;
  padding:5px 10px; border-radius:99px; font-size:11.5px;
  border:1px solid var(--line); color:var(--muted); background: var(--bg);
  transition: var(--t); white-space:nowrap;
}
.chip:hover{ border-color: var(--accent-line); color: var(--txt); }
.chip.ok{ color: var(--good); border-color: color-mix(in srgb, var(--good) 35%, var(--line)); }
.chip[hidden]{ display:none; }
.icon-btn{
  width:32px; height:32px; border-radius:9px; display:grid; place-items:center;
  border:1px solid var(--line); background: var(--bg); color:var(--txt-2);
  transition: var(--t); font-size:14px;
}
.icon-btn:hover{ border-color: var(--accent-line); color: var(--accent-strong); }

.view-root{ padding: 18px 26px 72px; max-width: 1120px; width:100%; }

/* ---------------- 基础件 ---------------- */
.card{
  background: var(--surface);
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.card.flat{ border:none; padding:0; }
.card-h{ display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px; }
.card-h h3{ margin:0; font-size:13px; font-weight:600; }
.card-h .sub{ font-size:11.5px; color:var(--muted); font-weight:400; }

.grid{ display:grid; gap:12px; }
.g2{ grid-template-columns: repeat(2, minmax(0,1fr)); }
.g3{ grid-template-columns: repeat(3, minmax(0,1fr)); }
.g4{ grid-template-columns: repeat(4, minmax(0,1fr)); }
@media (max-width: 1080px){ .g4{ grid-template-columns: repeat(2,minmax(0,1fr)); } }
@media (max-width: 860px){ .g3{ grid-template-columns: minmax(0,1fr); } }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  padding: 9px 16px; border-radius: 9px; font-weight:500; font-size:13px;
  border:1px solid var(--line); background: var(--bg); color: var(--txt);
  transition: background var(--t), border-color var(--t), color var(--t);
  white-space:nowrap;
}
.btn:hover{ background: var(--surface-2); border-color: var(--surface-3); }
.btn.primary{ background: var(--accent); color: var(--accent-ink); border-color: transparent; font-weight:600; }
.btn.primary:hover{ filter: brightness(1.06); }
.btn.ghost{ border-color: transparent; background: transparent; color: var(--txt-2); }
.btn.ghost:hover{ background: var(--surface-2); }
.btn.danger{ color: var(--bad); border-color: color-mix(in srgb, var(--bad) 30%, var(--line)); }
.btn.sm{ padding: 6px 11px; font-size:12px; border-radius:8px; }
.btn.lg{ padding: 11px 20px; font-size:14px; border-radius:10px; }
.btn.block{ width:100%; }
.btn:disabled{ opacity:.42; cursor:not-allowed; }
.btn-row{ display:flex; gap:8px; flex-wrap:wrap; }

.kpi{ display:flex; flex-direction:column; gap:3px; }
.kpi .k-label{ font-size:11.5px; color:var(--muted); }
.kpi .k-val{ font-size:22px; font-weight:600; letter-spacing:-.3px; font-variant-numeric: tabular-nums; line-height:1.25; }
.kpi .k-val small{ font-size:12px; font-weight:400; color:var(--muted); margin-left:1px; }
.kpi .k-foot{ font-size:11px; color:var(--muted); }

.tag{
  display:inline-flex; align-items:center; gap:3px;
  padding: 1px 7px; border-radius:99px; font-size:10.5px; font-weight:500;
  background: var(--surface-2); color: var(--txt-2); border:1px solid var(--line);
  white-space:nowrap;
}
.tag.green{ color: var(--good); border-color: color-mix(in srgb,var(--good) 30%, var(--line)); background: transparent; }
.tag.blue{ color: var(--accent-strong); border-color: var(--accent-line); background: transparent; }
.tag.amber{ color: var(--warn); border-color: color-mix(in srgb,var(--warn) 32%, var(--line)); background: transparent; }
.tag.red{ color: var(--bad); border-color: color-mix(in srgb,var(--bad) 32%, var(--line)); background: transparent; }
.tag.violet{ color: var(--accent-strong); border-color: var(--accent-line); background: transparent; }

.field{ display:flex; flex-direction:column; gap:6px; margin-bottom:14px; }
.field label{ font-size:12px; color:var(--txt-2); font-weight:500; }
.field .hint, .hint{ font-size:11.5px; color:var(--muted); }
.input, select.input{
  padding: 9px 11px; border-radius:9px; border:1px solid var(--line);
  background: var(--bg); color:var(--txt); outline:none; transition: border-color var(--t);
  width:100%;
}
.input::placeholder{ color: var(--muted); }
.input:focus{ border-color: var(--accent-strong); }
textarea.input{ resize:vertical; min-height:70px; line-height:1.65; }
.switch{ position:relative; width:38px; height:22px; border-radius:99px; background: var(--surface-3); transition:var(--t); flex:0 0 auto; }
.switch i{ position:absolute; top:2px; left:2px; width:18px; height:18px; border-radius:99px; background: #fff; box-shadow:0 1px 2px rgba(0,0,0,.15); transition: var(--t); }
html[data-theme="dark"] .switch i{ background: #9aa1ad; }
.switch.on{ background: var(--accent); }
.switch.on i{ left:18px; background: #fff; }
html[data-theme="dark"] .switch.on i{ background: var(--accent-ink); }
.switch-row{ display:flex; align-items:center; justify-content:space-between; gap:14px; padding:10px 0; border-bottom:1px solid var(--line-soft); }
.switch-row:last-child{ border-bottom:none; }
.switch-row .txt{ display:flex; flex-direction:column; gap:1px; }
.switch-row .txt strong{ font-size:12.5px; font-weight:500; }
.switch-row .txt span{ font-size:11px; color:var(--muted); }

.filters{ display:flex; gap:5px; flex-wrap:wrap; }
.filter-chip{
  padding:5px 11px; border-radius:99px; font-size:12px;
  border:1px solid var(--line); background: var(--bg); color: var(--muted); transition: var(--t);
}
.filter-chip:hover{ color: var(--txt); border-color: var(--surface-3); }
.filter-chip.on{ background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight:500; }

.empty{
  padding: 40px 16px; text-align:center; color: var(--muted); font-size:12.5px;
  border:1px dashed var(--line); border-radius: var(--radius);
}
.empty .big{ font-size:22px; display:block; margin-bottom:6px; opacity:.6; }

/* ---------------- 今日 ---------------- */
.today-head{ display:flex; align-items:flex-start; justify-content:space-between; gap:16px; flex-wrap:wrap; margin-bottom:16px; }
.today-head .lead{ min-width:0; }
.today-head .day{ font-size:11px; letter-spacing:.6px; color:var(--muted); font-variant-numeric: tabular-nums; }
.today-head h2{ margin:2px 0 4px; font-size:22px; font-weight:600; letter-spacing:-.3px; }
.today-head p{ margin:0; font-size:12.5px; color:var(--muted); }
.today-head .actions{ display:flex; gap:8px; align-items:center; }

.progress-line{ margin-bottom:16px; }
.progress-line .label{ display:flex; justify-content:space-between; font-size:11.5px; color:var(--muted); margin-bottom:5px; font-variant-numeric: tabular-nums; }
.progress-line .track{ height:6px; border-radius:99px; background: var(--surface-3); overflow:hidden; }
.progress-line .track i{ display:block; height:100%; border-radius:99px; background: var(--accent-strong); transition: width .35s var(--t); }

.note{
  display:flex; align-items:center; gap:10px; justify-content:space-between;
  padding:10px 12px; border-radius:10px; font-size:12.5px; line-height:1.6;
  background: var(--surface-2); color: var(--txt-2); margin-bottom:14px;
}
.note.warn{ background: color-mix(in srgb, var(--warn) 8%, transparent); border:1px solid color-mix(in srgb, var(--warn) 25%, var(--line)); }
.note .link{ color: var(--accent-strong); font-size:12px; white-space:nowrap; }

.due-list{ display:flex; flex-direction:column; max-height: 322px; overflow:auto; }
.due-item{
  display:flex; align-items:center; gap:10px; padding:9px 2px;
  border-bottom:1px solid var(--line-soft); font-size:12.5px; cursor:pointer;
}
.due-item:last-child{ border-bottom:none; }
.due-item:hover{ background: var(--surface-2); }
.due-item .w{ font-weight:600; font-family: var(--mono); font-size:12.5px; }
.due-item .m{ color: var(--muted); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; flex:1; min-width:0; }
.due-item .s{ font-size:11px; color: var(--warn); white-space:nowrap; }

.mini-stats{ display:flex; gap:0; flex-wrap:wrap; }
.mini-stat{ display:flex; flex-direction:column; padding-right:26px; }
.mini-stat b{ font-size:17px; font-weight:600; font-variant-numeric: tabular-nums; }
.mini-stat span{ font-size:11px; color:var(--muted); }

/* ---------------- 学习卡片 ---------------- */
.study-wrap{ display:flex; flex-direction:column; align-items:center; gap:14px; }
.study-bar{ width:100%; max-width:760px; display:flex; align-items:center; gap:10px; }
.study-bar .track{ flex:1; height:5px; border-radius:99px; background: var(--surface-3); overflow:hidden; }
.study-bar .track i{ display:block; height:100%; background: var(--accent-strong); border-radius:99px; transition: width .3s var(--t); }
.study-bar .txt{ font-size:11.5px; color: var(--muted); font-variant-numeric: tabular-nums; white-space:nowrap; }

.flash{ width:100%; max-width:760px; perspective: 1600px; cursor:pointer; }
.flash-inner{
  position:relative; width:100%; min-height: 380px;
  transition: transform .5s cubic-bezier(.4,.05,.2,1);
  transform-style: preserve-3d;
}
.flash.flipped .flash-inner{ transform: rotateY(180deg); }
.flash-face{
  position:absolute; inset:0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: 16px; border:1px solid var(--line);
  background: var(--surface);
  padding: 26px 28px; display:flex; flex-direction:column;
  overflow:auto;
}
.flash-face.back{ transform: rotateY(180deg); }
.flash-word{
  font-family: var(--mono); font-size: 40px; font-weight:600; letter-spacing:-1px;
  margin: 0 0 4px; word-break: break-word; line-height:1.15;
}
.flash-phon{ color: var(--muted); font-family: var(--mono); font-size:13.5px; display:flex; align-items:center; gap:8px; }
.speak-btn{
  width:26px; height:26px; border-radius:7px; display:grid; place-items:center;
  border:1px solid var(--line); color: var(--txt-2); background: var(--bg); font-size:12px;
}
.speak-btn:hover{ color: var(--accent-strong); border-color: var(--accent-line); }
.flash-center{ flex:1; display:flex; flex-direction:column; justify-content:center; align-items:center; text-align:center; }
.flash-hint{ color: var(--muted); font-size:12px; margin-top:16px; }
.flash-idx{ position:absolute; top:14px; right:18px; font-size:11px; color:var(--muted); font-variant-numeric: tabular-nums; }
.flash-flag{ position:absolute; top:13px; left:18px; }

.pos-block{ margin-bottom:10px; }
.pos-tag{ display:inline-block; font-size:10.5px; font-weight:600; color: var(--muted); margin-right:6px; font-family: var(--mono); }
.def-line{ font-size:17px; line-height:1.6; }
.ex-box{ margin-top:14px; padding-top:12px; border-top:1px solid var(--line-soft); }
.ex-item{ font-size:13px; line-height:1.75; color: var(--txt-2); }
.ex-item + .ex-item{ margin-top:9px; }
.ex-item b{ color: var(--accent-strong); font-weight:600; }
.ex-cn{ display:block; color: var(--muted); font-size:12px; margin-top:1px; }

.self-btns{ display:flex; gap:10px; width:100%; max-width:760px; }
.self-btns .btn{ flex:1; padding:13px; font-size:14px; border-radius:10px; }
.kbd-hint{ font-size:11px; color: var(--muted); text-align:center; }
kbd{
  font-family: var(--mono); font-size:10px; padding:0 4px; border-radius:4px;
  border:1px solid var(--line); background: var(--surface-2); color: var(--txt-2);
}

/* 学习队列里插入的复习卡 */
.review-tag{
  display:inline-flex; align-items:center; gap:4px; font-size:10.5px; font-weight:600;
  color: var(--accent-strong); background: var(--accent-weak); border-radius:99px; padding:2px 8px;
}
.step-card{ width:100%; max-width:760px; }

/* ---------------- 测试 ---------------- */
.quiz-shell{ max-width: 800px; margin:0 auto; display:flex; flex-direction:column; gap:12px; }
.q-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; }
.q-progress{ flex:1; height:5px; border-radius:99px; background: var(--surface-3); overflow:hidden; }
.q-progress i{ display:block; height:100%; border-radius:99px; background: var(--accent-strong); transition: width .3s var(--t); }
.q-num{ font-size:11.5px; color: var(--muted); font-variant-numeric: tabular-nums; white-space:nowrap; }
.q-body{ padding: 24px; }
.q-type{ font-size:10.5px; letter-spacing:.5px; color: var(--muted); font-weight:600; margin-bottom:10px; }
.q-stem{ font-size:15.5px; line-height:1.75; }
.q-stem .blank{ color: var(--accent-strong); font-weight:600; letter-spacing:1px; }
.q-word{ font-family: var(--mono); font-size:28px; font-weight:600; letter-spacing:-.5px; margin: 2px 0; }
.q-options{ display:grid; gap:8px; margin-top:16px; }
.opt{
  display:flex; align-items:center; gap:10px; text-align:left;
  padding: 11px 14px; border-radius:9px; border:1px solid var(--line);
  background: var(--bg); font-size:13.5px; transition: var(--t);
}
.opt:hover{ border-color: var(--accent-line); background: var(--surface-2); }
.opt .key{
  width:20px; height:20px; flex:0 0 auto; border-radius:5px; display:grid; place-items:center;
  font: 600 10.5px/1 var(--mono); background: var(--surface-2); color: var(--muted);
}
.opt.correct{ border-color: var(--good); background: color-mix(in srgb, var(--good) 8%, transparent); }
.opt.correct .key{ background: var(--good); color:#fff; }
.opt.wrong{ border-color: var(--bad); background: color-mix(in srgb, var(--bad) 8%, transparent); }
.opt.wrong .key{ background: var(--bad); color:#fff; }
.opt.dim{ opacity:.5; }
.opt[disabled]{ cursor:default; }

.blank-input{
  width:100%; margin-top:16px; padding: 12px 14px; border-radius:9px;
  border:1px solid var(--line); background: var(--bg);
  font-family: var(--mono); font-size:18px; letter-spacing:1px; outline:none;
  transition: border-color var(--t);
}
.blank-input::placeholder{ font-family: var(--font); font-size:13px; letter-spacing:0; color:var(--muted); }
.blank-input:focus{ border-color: var(--accent-strong); }
.blank-input.ok{ border-color: var(--good); color: var(--good); }
.blank-input.no{ border-color: var(--bad); color: var(--bad); }
.blank-meta{ display:flex; justify-content:space-between; align-items:center; gap:10px; margin-top:9px; font-size:12px; color:var(--muted); }
.letters{ font-family: var(--mono); letter-spacing:3px; color: var(--muted); font-size:14px; }

.feedback{
  margin-top:14px; padding:12px 14px; border-radius:9px; font-size:13px; line-height:1.7;
  border:1px solid var(--line); background: var(--surface-2);
  animation: fadeUp .2s var(--t);
}
.feedback.good{ border-color: color-mix(in srgb,var(--good) 35%, var(--line)); background: color-mix(in srgb,var(--good) 6%, transparent); }
.feedback.bad{ border-color: color-mix(in srgb,var(--bad) 35%, var(--line)); background: color-mix(in srgb,var(--bad) 6%, transparent); }
@keyframes fadeUp{ from{ opacity:0; transform: translateY(4px);} to{opacity:1; transform:none;} }

.result-ring{ display:flex; align-items:center; gap:22px; flex-wrap:wrap; }
.result-list{ display:flex; flex-direction:column; }
.result-row{ display:flex; align-items:center; gap:10px; padding:7px 2px; border-bottom:1px solid var(--line-soft); font-size:12.5px; }
.result-row:last-child{ border-bottom:none; }
.result-row .w{ font-family:var(--mono); font-weight:600; min-width:104px; }
.result-row .m{ color:var(--muted); flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.result-row .ok{ color: var(--good); } .result-row .no{ color: var(--bad); }

/* ---------------- 词库 ---------------- */
.toolbar{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; margin-bottom:12px; }
.toolbar .input{ max-width:260px; }
.word-table{ display:flex; flex-direction:column; }
.word-row{
  display:grid; grid-template-columns: 170px minmax(0,1fr) 78px 56px;
  gap:10px; align-items:center;
  padding: 10px 8px; border-radius:7px; cursor:pointer;
  border-bottom:1px solid var(--line-soft); transition: background var(--t);
}
.word-row:last-child{ border-bottom:none; }
.word-row:hover{ background: var(--surface-2); }
.word-row .w{ display:flex; align-items:center; gap:6px; font-family: var(--mono); font-weight:600; font-size:13px; min-width:0; }
.word-row .w span{ overflow:hidden; text-overflow:ellipsis; }
.word-row .t{ color: var(--txt-2); font-size:12.5px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.word-row .st{ text-align:right; }
.word-row .ac{ text-align:right; font-size:11.5px; color: var(--muted); font-variant-numeric: tabular-nums; }
.star{ color: var(--warn); font-size:11px; }
.pager{ display:flex; align-items:center; justify-content:center; padding: 14px 0 2px; font-size:11.5px; color: var(--muted); }

/* ---------------- 图表 ---------------- */
.chart-box{ width:100%; overflow:hidden; }
.chart-box svg{ display:block; width:100%; height:auto; }
.legend{ display:flex; gap:14px; flex-wrap:wrap; font-size:11px; color: var(--muted); margin-top:6px; }
.legend i{ display:inline-block; width:8px; height:8px; border-radius:2px; margin-right:4px; vertical-align:middle; }

.heat{ display:flex; gap:5px; overflow:hidden; width:100%; }
.heat-col{ display:flex; flex:1; max-width:26px; min-width:0; flex-direction:column; gap:5px; }
.heat i{ width:100%; aspect-ratio:1; border-radius:3px; background: var(--surface-3); }
.heat i.l1{ background: color-mix(in srgb, var(--accent-strong) 22%, var(--surface-3)); }
.heat i.l2{ background: color-mix(in srgb, var(--accent-strong) 45%, var(--surface-3)); }
.heat i.l3{ background: color-mix(in srgb, var(--accent-strong) 70%, var(--surface-3)); }
.heat i.l4{ background: var(--accent-strong); }

/* ---------------- 外观选择 ---------------- */
.theme-grid{ display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap:8px; }
.theme-opt{
  border:1px solid var(--line); border-radius:10px; padding:9px; text-align:left;
  display:flex; flex-direction:column; gap:6px; transition: var(--t); background: var(--bg);
}
.theme-opt:hover{ border-color: var(--accent-line); }
.theme-opt.on{ border-color: var(--accent-strong); box-shadow: inset 0 0 0 1px var(--accent-strong); }
.theme-opt .prev{ height:32px; border-radius:6px; border:1px solid var(--line); overflow:hidden; display:flex; }
.theme-opt .prev i{ flex:1; }
.theme-opt .prev .p1{ background:#fff; } .theme-opt .prev .p2{ background:#eef0f3; }
.theme-opt .prev .d1{ background:#000; } .theme-opt .prev .d2{ background:#1c1c20; }
.theme-opt .prev .s1{ background: linear-gradient(90deg,#fff 50%, #000 50%); }
.theme-opt .prev .s2{ background: linear-gradient(90deg,#eef0f3 50%, #1c1c20 50%); }
.theme-opt strong{ font-size:12px; font-weight:500; }
.theme-opt span{ font-size:10.5px; color:var(--muted); }

.accent-row{ display:flex; align-items:center; justify-content:space-between; gap:10px; margin-top:10px; }
.accent-lbl{ font-size:12px; color:var(--muted); flex:0 0 auto; }
.swatches{ display:flex; gap:6px; align-items:center; flex-wrap:wrap; justify-content:flex-end; }
.swatch{
  width:24px; height:24px; border-radius:99px; border:2px solid transparent;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.06); transition: var(--t);
}
.swatch[data-accent$="-soft"]{ box-shadow: inset 0 0 0 1px rgba(0,0,0,.14); }
.swatch.on{ border-color: var(--txt); }
.swatch[data-accent="red"]{ background:#dc2626; }
.swatch[data-accent="red-soft"]{ background:#fca5a5; }
.swatch[data-accent="orange"]{ background:#ea580c; }
.swatch[data-accent="orange-soft"]{ background:#fdba74; }
.swatch[data-accent="amber"]{ background:#b45309; }
.swatch[data-accent="amber-soft"]{ background:#fcd34d; }
.swatch[data-accent="green"]{ background:#15803d; }
.swatch[data-accent="green-soft"]{ background:#86efac; }
.swatch[data-accent="teal"]{ background:#0d9488; }
.swatch[data-accent="teal-soft"]{ background:#5eead4; }
.swatch[data-accent="blue"]{ background:#2563eb; }
.swatch[data-accent="blue-soft"]{ background:#93c5fd; }
.swatch[data-accent="violet"]{ background:#7c3aed; }
.swatch[data-accent="violet-soft"]{ background:#c4b5fd; }
.swatch[data-accent="pink"]{ background:#db2777; }
.swatch[data-accent="pink-soft"]{ background:#f9a8d4; }

/* ---------------- 账户 ---------------- */
.auth-wrap{ max-width: 400px; margin: 0 auto; }
.auth-tabs{ display:flex; gap:4px; background: var(--surface-2); padding:3px; border-radius:9px; margin-bottom:16px; }
.auth-tabs button{ flex:1; padding:7px; border-radius:7px; font-size:12.5px; color: var(--muted); transition: var(--t); }
.auth-tabs button.on{ background: var(--bg); color: var(--txt); font-weight:600; box-shadow: var(--shadow); }
.auth-note{ font-size:11.5px; color: var(--muted); line-height:1.7; margin-top:14px; }
.form-error{ color: var(--bad); font-size:12px; margin-top:2px; min-height:17px; }

.sync-row{ display:flex; align-items:center; justify-content:space-between; gap:12px; padding:11px 0; border-bottom:1px solid var(--line-soft); font-size:12.5px; }
.sync-row:last-child{ border-bottom:none; }
.sync-row .k{ color: var(--muted); }
.sync-dot{ display:inline-block; width:7px; height:7px; border-radius:99px; background: var(--muted); margin-right:6px; }
.sync-dot.on{ background: var(--good); } .sync-dot.busy{ background: var(--warn); } .sync-dot.err{ background: var(--bad); }

/* ---------------- 弹窗 ---------------- */
.modal-mask{
  position:fixed; inset:0; z-index:120; display:grid; place-items:center; padding:16px;
  background: color-mix(in srgb, #000 45%, transparent);
  animation: fadeIn .16s var(--t);
}
@keyframes fadeIn{ from{opacity:0} to{opacity:1} }
.modal{
  width:100%; max-width: 600px; max-height: 88vh; overflow:auto;
  background: var(--surface); border:1px solid var(--line); border-radius: 14px;
  padding: 20px 22px;
  animation: popIn .18s var(--t);
}
@keyframes popIn{ from{ opacity:0; transform: translateY(6px);} to{opacity:1; transform:none;} }
.modal-h{ display:flex; align-items:flex-start; justify-content:space-between; gap:12px; margin-bottom:14px; }
.modal-h h2{ margin:0; font-size:18px; font-family: var(--mono); letter-spacing:-.3px; }
.modal-h .ph{ font-family: var(--mono); font-size:12px; color: var(--muted); margin-top:2px; display:flex; align-items:center; gap:7px; }

.toast-wrap{ position:fixed; bottom:20px; left:50%; transform:translateX(-50%); z-index:200; display:flex; flex-direction:column; gap:6px; align-items:center; pointer-events:none; }
.toast{
  padding:9px 16px; border-radius:99px; font-size:12.5px;
  background: var(--txt); color: var(--bg);
  animation: toastIn .18s var(--t);
  max-width: 82vw; text-align:center;
}
@keyframes toastIn{ from{opacity:0; transform: translateY(8px);} to{opacity:1; transform:none;} }

/* 设置页计算框 */
.calc-box{
  margin: 2px 0 16px; padding: 12px 14px; border-radius:10px;
  border:1px solid var(--line); background: var(--surface-2);
  font-size:12.5px; color: var(--txt-2); line-height:1.7;
  font-variant-numeric: tabular-nums;
}
.calc-box b{ color: var(--accent-strong); font-size:16px; font-weight:600; margin:0 1px; }
.calc-sep{ color: var(--muted); margin:0 6px; opacity:.5; }
.calc-sub{ color: var(--muted); font-size:11.5px; margin-top:1px; }
.calc-warn{ color: var(--warn); font-size:11.5px; margin-top:5px; }

/* ---------------- 响应式 ---------------- */
.mobile-tabs{ display:none; }
@media (max-width: 900px){
  .app{ grid-template-columns: minmax(0,1fr); }
  .sidebar{ display:none; }
  .topbar{ padding: 12px 14px 10px; }
  .topbar-left h1{ font-size:16px; }
  .topbar-left p{ display:none; }
  .view-root{ padding: 14px 14px calc(84px + env(safe-area-inset-bottom)); }
  .mobile-tabs{
    display:flex; position:fixed; bottom:0; left:0; right:0; z-index:60;
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
    background: var(--bg);
    border-top:1px solid var(--line);
  }
  .mtab{
    flex:1; display:flex; flex-direction:column; align-items:center; gap:1px;
    padding:4px 2px; font-size:10px; color: var(--muted); border-radius:8px;
  }
  .mtab .ico{ font-size:15px; line-height:1.2; }
  .mtab.active{ color: var(--accent-strong); }
  .mobile-hide{ display:none !important; }
}
@media (max-width: 720px){
  .g2,.g3{ grid-template-columns: minmax(0,1fr); }
  .g4{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .card{ padding: 14px; border-radius:12px; }
  .today-head h2{ font-size:19px; }
  .today-head .actions{ width:100%; }
  .today-head .actions .btn{ flex:1; }
  .kpi .k-val{ font-size:20px; }
  .flash-word{ font-size:32px; }
  .flash-face{ padding: 20px 18px; }
  .flash-inner{ min-height: 340px; }
  .q-body{ padding:18px; }
  .word-row{ grid-template-columns: minmax(0,1fr) 74px; }
  .word-row .t, .word-row .ac{ display:none; }
  .mini-stat{ padding-right:18px; }
  .modal{ padding:16px; }
}