:root {
  --paper: #f6f4ee;
  --card: #fffdf8;
  --ink: #1d1b17;
  --ink-2: #4b4842;
  --muted: #7d796f;
  --line: #e4dfd3;
  --accent: #b5442d;
  --accent-ink: #fff;
  --ok: #2c7a4b;
  --ok-bg: #e6f3ea;
  --ng: #b83a2c;
  --ng-bg: #f9e7e3;
  --radius: 14px;
  --nav-h: 58px;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); color: var(--ink);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif; font-size: 16px; line-height: 1.55; }
[v-cloak] { display: none; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
h1 { font-family: "Noto Serif JP", serif; font-size: 2rem; line-height: 1.2; margin: .3rem 0; letter-spacing: -.01em; }
h2 { font-size: 1.05rem; margin: 0 0 .6rem; }
.muted { color: var(--muted); }
.small { font-size: .82rem; }
.tiny { font-size: .66rem; }
.nowrap { white-space: nowrap; }
.center-text { text-align: center; }
.page { max-width: 640px; margin: 0 auto; padding: 16px 16px 48px; }
.page.center { display: grid; place-items: center; min-height: 60vh; }

/* ── 壳 ── */
.topbar { position: sticky; top: 0; z-index: 5; background: rgba(246,244,238,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.topbar-in { max-width: 980px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-kanji { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: var(--accent); color: var(--accent-ink); font-family: "Noto Serif JP", serif; font-size: 1.15rem; }
.tabs { display: flex; gap: 4px; margin-left: auto; }
.tabs a { padding: 6px 12px; border-radius: 8px; color: var(--ink-2); font-weight: 500; }
.tabs a.on { background: var(--ink); color: var(--paper); }
.auth-bar { display: flex; align-items: center; gap: 10px; }
.uname { font-weight: 600; }
.bottombar { display: none; }
@media (max-width: 639px) {
  .brand-name, .tabs { display: none; }
  .auth-bar { margin-left: auto; }
  .page { padding-bottom: calc(var(--nav-h) + 24px); }
  .bottombar { display: grid; grid-template-columns: repeat(3, 1fr); position: fixed; left: 0; right: 0; bottom: 0; height: var(--nav-h);
    background: var(--card); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); z-index: 5; }
  .bottombar a { display: grid; justify-items: center; align-content: center; gap: 2px; font-size: .72rem; color: var(--muted); }
  .bottombar a.on { color: var(--accent); }
  .bottombar .ico { font-family: "Noto Serif JP", serif; font-size: 1.15rem; line-height: 1; }
}

.top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 4px 0 18px; }
.chip { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); font-size: .82rem; white-space: nowrap; }
.chip.hot { border-color: #f0c9a8; background: #fff2e6; }
.chip.link { border-color: #e3cfc9; color: var(--accent); }
.chip.link:hover { background: #fbeeea; }
.chip.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.ghost { background: none; border: 0; padding: 6px 8px 6px 0; color: var(--ink-2); }
.eyebrow { font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin: 0; }
.eyebrow a { text-decoration: underline; text-underline-offset: 3px; }

.hero { padding: 8px 0 22px; }
.hero.compact { padding-bottom: 12px; }
.hero .muted { margin: .2rem 0 1rem; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 1rem; }

.btn { display: inline-block; border: 1px solid var(--line); background: var(--card); border-radius: 10px; padding: 9px 16px; font-weight: 500; text-align: center; }
.btn:hover { border-color: #cfc8b8; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: #a03b26; }
.btn.big { padding: 13px 22px; font-size: 1.05rem; border-radius: 12px; }
.btn.small { padding: 5px 11px; font-size: .82rem; }

.notice { background: #fff7e8; border: 1px solid #f0dcb4; border-radius: 10px; padding: 9px 14px; font-size: .88rem; margin-bottom: 14px; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.linkbtn { background: none; border: 0; padding: 0; color: var(--accent); font-weight: 600; }
.linkbtn.small { justify-self: start; }

.levels { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (min-width: 560px) { .levels { grid-template-columns: repeat(3, 1fr); } }
.level-card { text-align: left; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; display: grid; gap: 9px; }
.level-card:hover { border-color: #cfc8b8; transform: translateY(-1px); }
.level-head { display: flex; justify-content: space-between; align-items: baseline; }
.level-name { font-family: "Noto Serif JP", serif; font-size: 1.4rem; font-weight: 700; }
.level-name.small-name { font-size: 1.05rem; width: 2.4em; }
.bar { height: 6px; border-radius: 999px; background: #ebe6da; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 999px; transition: width .4s; }
.level-foot { display: flex; justify-content: space-between; font-size: .82rem; color: var(--ink-2); }
.weak-tag { color: var(--ng); }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 14px 0 22px; }
.tile { text-align: left; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; display: grid; gap: 2px; }
.tile:disabled { opacity: .55; cursor: default; }
.tile-k { font-weight: 700; }
.tile-v { font-size: .82rem; color: var(--muted); }

.block { margin: 0 0 22px; }
.search { width: 100%; padding: 11px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); font: inherit; margin-bottom: 8px; }
.filters { margin-bottom: 12px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.plist { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.plist li { display: grid; grid-template-columns: auto 1fr auto auto; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
.plist li.lvrow { grid-template-columns: auto 1fr auto; }
.lv { font-size: .72rem; font-weight: 700; color: var(--accent); background: #fbeeea; padding: 2px 6px; border-radius: 6px; white-space: nowrap; }
.ptitle { font-weight: 500; min-width: 0; }
a.ptitle:hover { color: var(--accent); }
.dots { display: inline-flex; gap: 3px; }
.dots i { width: 8px; height: 8px; border-radius: 50%; background: #e2ddd1; }
.dots.big i { width: 11px; height: 11px; }
.dots i.ok { background: var(--ok); }
.dots i.ng { background: var(--ng); }
.menu { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.menu a { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; }
.menu i { font-style: normal; color: var(--muted); }

/* ── 语法详情 ── */
.gpage h1 { font-size: 1.9rem; }
.h1-note { font-size: 1.1rem; color: var(--muted); font-weight: 500; margin-left: 4px; }
.gmeaning { font-size: 1.15rem; color: var(--ink-2); margin: .2rem 0 1rem; }
.gbox { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 16px; margin-bottom: 14px; }
.gbox .conn-pat { margin: 2px 0 4px; font-weight: 600; }
.gbox .muted { margin: 0; }
.intro { border-left: 3px solid var(--accent); padding: 4px 14px; margin: 0 0 18px; }
.intro .jp { font-size: 1.15rem; font-weight: 500; margin: 0 0 2px; }
.intro .muted { margin: 0; }
.gsec { margin: 0 0 22px; }
.gsec h2 { font-size: 1rem; color: var(--accent); letter-spacing: .04em; }
.exlist { margin: 0; padding-left: 1.4em; display: grid; gap: 8px; }
.exlist li { display: grid; gap: 1px; }
.exlist .jp { font-size: 1.05rem; font-weight: 500; }
.md { line-height: 1.75; }
.md h2 { font-size: 1rem; color: var(--accent); margin: 1.4em 0 .5em; }
.md h3 { font-size: .95rem; margin: 1.2em 0 .4em; }
.md p { margin: 0 0 .8em; }
.md table { border-collapse: collapse; width: 100%; font-size: .92rem; margin: .6em 0; }
.md th, .md td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; }
.md th { background: var(--card); font-weight: 600; }
.md code { background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 0 4px; font-size: .92em; }
.callout { background: var(--ng-bg); border: 1px solid #f0cfc8; border-radius: var(--radius); padding: 12px 16px; }
.callout h2 { color: var(--ng); }
.callout p { margin: 0; }
.simlist { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.simlist a { color: var(--accent); }
.cta { position: sticky; bottom: 12px; display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px 10px 16px; box-shadow: 0 8px 30px rgba(0,0,0,.08); margin-top: 8px; }
@media (max-width: 639px) { .cta { bottom: calc(var(--nav-h) + 10px); } }

/* ── 错题本 ── */
.wgroup { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 10px; }
.wgroup-head { display: grid; grid-template-columns: auto 1fr auto auto; gap: 10px; align-items: center; margin-bottom: 8px; }
.wlist { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.wlist li { display: grid; gap: 1px; padding: 8px 0 0; border-top: 1px dashed var(--line); font-size: .95rem; }

/* ── 刷题 ── */
.drill .top { padding-bottom: 10px; }
.sess { display: grid; justify-items: center; gap: 4px; }
.progress { display: inline-flex; gap: 4px; }
.progress i { width: 9px; height: 9px; border-radius: 3px; background: #e2ddd1; }
.progress i.cur { background: var(--ink); }
.progress i.ok { background: var(--ok); }
.progress i.ng { background: var(--ng); }

.qcard { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 18px 14px; }
.qno { margin: 0 0 8px; }
.stem { font-size: 1.28rem; line-height: 1.8; margin: 0 0 16px; font-weight: 500; }
.blank { display: inline-block; min-width: 4.2em; border-bottom: 2px solid var(--ink); text-align: center; color: var(--accent); font-weight: 700; }
.blank.filled { border-bottom-color: var(--ok); color: var(--ok); min-width: 0; padding: 0 .2em; }
.opts { display: grid; gap: 8px; }
.opt { display: flex; align-items: center; gap: 12px; width: 100%; text-align: left; padding: 12px 14px;
  border: 1.5px solid var(--line); border-radius: 12px; background: var(--paper); font-size: 1.12rem; transition: all .12s; }
.opt:hover:not(:disabled) { border-color: var(--ink); background: #fff; }
.opt .key { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 6px; background: #ebe6da; font-size: .8rem; font-weight: 700; color: var(--ink-2); }
.opt.right { border-color: var(--ok); background: var(--ok-bg); }
.opt.right .key { background: var(--ok); color: #fff; }
.opt.wrong { border-color: var(--ng); background: var(--ng-bg); }
.opt.wrong .key { background: var(--ng); color: #fff; }
.opt.dim { opacity: .45; }
.opt:disabled { cursor: default; }

.panel { margin-top: 12px; background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--ok); border-radius: var(--radius); padding: 14px 16px 16px; }
.panel.bad { border-left-color: var(--ng); }
.verdict { display: flex; align-items: baseline; gap: 12px; margin-bottom: 6px; }
.panel.good .verdict b { color: var(--ok); }
.panel.bad .verdict b { color: var(--ng); }
.expl { margin: 0 0 12px; color: var(--ink-2); }
.gcard { border-top: 1px dashed var(--line); padding-top: 12px; display: grid; gap: 6px; font-size: .95rem; }
.gcard-head { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.lab { display: inline-block; font-size: .72rem; color: var(--muted); margin-right: 8px; letter-spacing: .06em; }
.conn, .ex, .mis { margin: 0; }
.mis { color: var(--ng); }
.conf { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.more { color: var(--accent); font-weight: 600; justify-self: end; }
.next { width: 100%; margin-top: 14px; padding: 13px; font-size: 1.05rem; display: flex; justify-content: center; gap: 10px; align-items: center; }
.hint { font-size: .72rem; opacity: .7; border: 1px solid rgba(255,255,255,.5); border-radius: 5px; padding: 1px 6px; }

/* ── 账号 ── */
.overlay { position: fixed; inset: 0; background: rgba(29,27,23,.45); display: grid; place-items: center; padding: 16px; z-index: 10; }
.modal { width: 100%; max-width: 380px; background: var(--card); border-radius: 16px; padding: 22px; display: grid; gap: 10px; box-shadow: 0 20px 50px rgba(0,0,0,.25); }
.modal h2 { margin: 0; }
.modal input { padding: 11px 13px; border: 1px solid var(--line); border-radius: 10px; font: inherit; background: var(--paper); }
.modal .actions { margin-top: 4px; align-items: center; }
.modal.inline { box-shadow: none; border: 1px solid var(--line); margin: 0 auto; }
.err { color: var(--ng); margin: 0; font-size: .88rem; }
.ok-msg { color: var(--ok); margin: 0; font-size: .88rem; }
.dev { margin: 0; font-size: .82rem; background: #fff7e8; border: 1px dashed #f0dcb4; border-radius: 8px; padding: 8px 10px; word-break: break-all; }
.dev a { color: var(--accent); }

/* ── 我的 / 后台 ── */
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 22px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; display: grid; gap: 2px; }
.stat-v { font-family: "Noto Serif JP", serif; font-size: 1.8rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-k { font-size: .82rem; color: var(--ink-2); }
.bars { display: flex; align-items: flex-end; gap: 6px; height: 130px; padding: 8px 4px 0; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.bar-col { flex: 1; display: grid; grid-template-rows: 1fr auto auto; justify-items: center; align-items: end; height: 100%; gap: 2px; }
.bar-col i { display: block; width: 70%; background: var(--accent); border-radius: 4px 4px 0 0; min-height: 2px; }
.tbl { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; font-size: .92rem; font-variant-numeric: tabular-nums; }
.tbl th, .tbl td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.tbl th { font-size: .78rem; color: var(--muted); font-weight: 500; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl td.bad { color: var(--ng); font-weight: 600; }
.tbl a:hover { color: var(--accent); }

.rise-enter-from { opacity: 0; transform: translateY(10px); }
.rise-enter-active { transition: all .22s ease-out; }

/* ══ 首页 · 道场 ══ */
.page.wide { max-width: 980px; }
.brand-name { display: grid; line-height: 1.1; }
.brand-name small { font-size: .66rem; font-weight: 500; color: var(--muted); letter-spacing: .08em; }
.tate { writing-mode: vertical-rl; font-family: "Noto Serif JP", serif; font-size: .95rem; letter-spacing: .28em; color: var(--accent); margin: 0; padding-top: .3rem; }
.hero2 { display: grid; grid-template-columns: 1.05fr 1fr; gap: 36px; align-items: start; padding: 30px 0 44px; }
.hero-text { display: grid; grid-template-columns: auto 1fr; gap: 22px; }
.hero2 h1 { font-size: 2.7rem; line-height: 1.18; margin: .3rem 0 .9rem; }
.jp-mark { color: var(--accent); border-bottom: 3px solid var(--accent); padding: 0 .06em; }
.lead { font-size: 1.05rem; color: var(--ink-2); margin: 0 0 1.3rem; max-width: 32em; }
.lead b { color: var(--ink); font-variant-numeric: tabular-nums; }
.hero-card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px; box-shadow: 0 24px 60px rgba(29,27,23,.09); }
.hq-head { display: flex; gap: 10px; align-items: center; margin-bottom: 10px; }
.hq-head .right { margin-left: auto; letter-spacing: .06em; }
.hero-card .stem { font-size: 1.22rem; }
.hero-card .opt { font-size: 1.05rem; padding: 10px 12px; }
.hq-panel { margin-top: 12px; border-top: 1px dashed var(--line); padding-top: 12px; }
.hq-panel.good .verdict b { color: var(--ok); }
.hq-panel.bad .verdict b { color: var(--ng); }
.hq-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.hq-actions .more { margin-right: auto; }

.sec-head { display: grid; grid-template-columns: auto 1fr; gap: 22px; align-items: start; margin-bottom: 20px; }
.sec-head .muted { margin: 0; max-width: 40em; }
.h2big { font-family: "Noto Serif JP", serif; font-size: 1.75rem; margin: .2rem 0 .4rem; }
.steps, .how, .gteaser { padding: 34px 0; border-top: 1px solid var(--line); }
.stairs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; align-items: end; }
.stair { --h: 1; display: grid; gap: 3px; align-content: start; text-align: left; background: var(--card); border: 1px solid var(--line); border-bottom: 3px solid var(--accent);
  border-radius: 12px 12px 0 0; padding: 14px 12px; min-height: calc(112px + var(--h) * 26px); transition: transform .12s; }
.stair:hover { transform: translateY(-2px); background: #fff; }
.stair-lv { font-family: "Noto Serif JP", serif; font-size: 2rem; font-weight: 700; line-height: 1; }
.stair-n { font-weight: 600; font-variant-numeric: tabular-nums; }
.stair-me { margin-top: auto; font-size: .78rem; color: var(--accent); font-weight: 600; }
.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.how-item { display: grid; gap: 4px; align-content: start; }
.how-n { font-family: "Noto Serif JP", serif; font-size: 1.7rem; color: var(--accent); line-height: 1; margin-bottom: 4px; }
.gteaser .search { margin-bottom: 10px; }
.gteaser .chips { align-items: center; }

@media (max-width: 760px) {
  .hero2 { grid-template-columns: 1fr; gap: 22px; padding-top: 16px; }
  .hero2 h1 { font-size: 2rem; }
  .tate { display: none; }
  .hero-text, .sec-head { grid-template-columns: 1fr; }
  .stairs { gap: 5px; }
  .stair { padding: 10px 7px; min-height: calc(92px + var(--h) * 16px); gap: 2px; }
  .stair-lv { font-size: 1.35rem; }
  .stair-n { font-size: .85rem; }
  .stair-p { font-size: .68rem; }
  .stair-me { font-size: .66rem; }
  .how { grid-template-columns: 1fr; }
}