/* Layout: 一列の練習台。上に成績と設定、中央に雀卓（状況・ドラ・手牌）、下に回答と解説 */
:root{
  --paper:#f2f4ef; --surface:#ffffff; --ink:#1c2520; --muted:#5d6b63; --line:#d6ddd6;
  --felt:#1f5c45; --felt-2:#18513c; --felt-ink:#e6efe9;
  --ok:#2c7a4b; --ok-bg:#e3f1e8; --ng:#b3261e; --ng-bg:#f8e4e2; --accent:#a8323e;
  --focus:#d08a1e; --logo-plate:transparent; --logo-pad:0;
  --f-tile:"Shippori Mincho B1","Hiragino Mincho ProN","Yu Mincho",serif;
  --f-body:"Zen Kaku Gothic New","Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#111613; --surface:#1a211d; --ink:#e3eae5; --muted:#9aa9a0; --line:#2c3630;
  --felt:#174634; --felt-2:#123b2b; --felt-ink:#dfeae3; --accent:#f08a96;
  --ok:#6fcf97; --ok-bg:#183326; --ng:#f08a80; --ng-bg:#3a1d1a; --focus:#f0b04a; --logo-plate:#ffffff; --logo-pad:6px 10px;
  color-scheme:dark }}
:root[data-theme="dark"]{
  --paper:#111613; --surface:#1a211d; --ink:#e3eae5; --muted:#9aa9a0; --line:#2c3630;
  --felt:#174634; --felt-2:#123b2b; --felt-ink:#dfeae3; --accent:#f08a96;
  --ok:#6fcf97; --ok-bg:#183326; --ng:#f08a80; --ng-bg:#3a1d1a; --focus:#f0b04a; --logo-plate:#ffffff; --logo-pad:6px 10px;
  color-scheme:dark }
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.6}
.wrap{max-width:780px;margin:0 auto;padding-block:20px 28px;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));
  display:flex;flex-direction:column;gap:16px}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
header{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px}
.brand{display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.logo{display:block;width:clamp(150px,30vw,200px);height:auto;background:var(--logo-plate);border-radius:8px;padding:var(--logo-pad)}
h1{margin:0;font-family:var(--f-tile);font-weight:800;font-size:clamp(24px,5vw,32px);line-height:1.2}
.score{display:flex;gap:8px;font-variant-numeric:tabular-nums}
.chip{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:4px 12px;text-align:center;min-width:72px}
.chip span{display:block;font-size:11px;color:var(--muted);letter-spacing:.06em}
.chip b{font-size:18px}
.score-cap{font-size:11px;color:var(--muted);letter-spacing:.08em;align-self:center;writing-mode:vertical-rl}

.settings{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;font-size:14px}
.settings>div{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--surface)}
.seg button{border:0;background:none;padding:6px 12px;border-right:1px solid var(--line)}
.seg button:last-child{border-right:0}
.seg button[aria-pressed="true"]{background:var(--felt);color:var(--felt-ink);font-weight:700}
.lbl{color:var(--muted);font-size:12px;letter-spacing:.08em;margin-right:4px}

.table{background:radial-gradient(120% 140% at 50% 0%,var(--felt) 0%,var(--felt-2) 100%);
  border-radius:14px;padding:16px 14px 20px;color:var(--felt-ink);display:flex;flex-direction:column;gap:14px}
.qline{display:flex;justify-content:space-between;align-items:baseline;gap:8px;font-size:13px;letter-spacing:.06em;opacity:.9;flex-wrap:wrap}
.qline b{font-variant-numeric:tabular-nums}
.situ{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{border:1px solid rgba(255,255,255,.35);border-radius:6px;padding:2px 10px;font-size:14px;font-weight:700;background:rgba(0,0,0,.12)}
.tag.hot{background:#f4e7c4;color:#5a3d06;border-color:#f4e7c4}
.inds{display:flex;gap:14px;flex-wrap:wrap}
.ind{display:flex;align-items:center;gap:6px;font-size:12px;letter-spacing:.04em}
.ind img{width:30px;height:auto;filter:drop-shadow(0 1px 1px rgba(0,0,0,.3))}
.hand{container-type:inline-size;width:100%}
.hand .grp{display:flex;flex-wrap:wrap;align-items:flex-end;gap:calc(16 * var(--px)) calc(16 * var(--px));row-gap:10px}
.hand svg{display:block;height:auto;filter:drop-shadow(0 2px 2px rgba(0,0,0,.28))}

.ask{display:flex;flex-direction:column;gap:12px}
.ask p{margin:0;font-weight:700;font-size:16px}
.step{display:flex;flex-direction:column;gap:6px}
.step h3{margin:0;font-size:13px;color:var(--muted);letter-spacing:.06em;font-weight:700}
.choices{display:grid;gap:6px;grid-template-columns:repeat(var(--cols,3),minmax(0,1fr))}
.choices button{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px 4px;
  font-family:var(--f-tile);font-weight:800;font-size:18px;line-height:1.2;font-variant-numeric:tabular-nums;min-width:0;transition:transform .08s,background .15s}
.choices button small{display:block;font-family:var(--f-body);font-weight:500;font-size:11px;color:var(--muted)}
.choices button:hover:not(:disabled){border-color:var(--felt);transform:translateY(-1px)}
.choices button[aria-pressed="true"]{border-color:var(--felt);box-shadow:inset 0 0 0 2px var(--felt)}
.choices button:disabled{cursor:default}
.choices button.correct{background:var(--ok-bg);border-color:var(--ok);color:var(--ok)}
.choices button.wrong{background:var(--ng-bg);border-color:var(--ng);color:var(--ng)}
.c-fu{--cols:11}.c-han{--cols:4}.c-pt{--cols:3}
@media (max-width:560px){.c-fu{--cols:6}.c-pt{--cols:2}}
.hint{font-size:12px;color:var(--muted)}

.result{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:16px}
.verdict{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.badge{font-weight:700;border-radius:999px;padding:3px 14px;font-size:14px}
.badge.ok{background:var(--ok-bg);color:var(--ok)} .badge.ng{background:var(--ng-bg);color:var(--ng)}
.verdict .ans{font-family:var(--f-tile);font-size:22px;font-weight:800}
.marks{display:flex;gap:8px;flex-wrap:wrap;font-size:13px}
.marks span{border:1px solid var(--line);border-radius:6px;padding:2px 10px}
.marks .ok{color:var(--ok);border-color:var(--ok)} .marks .ng{color:var(--ng);border-color:var(--ng)}
.sect h3{margin:0 0 8px;font-size:13px;letter-spacing:.08em;color:var(--muted);font-weight:700}
.sect h3 em{font-style:normal;color:var(--ink);font-variant-numeric:tabular-nums}
table.bd{width:100%;border-collapse:collapse;font-size:14px}
table.bd td{padding:6px 4px;border-bottom:1px solid var(--line);vertical-align:middle}
table.bd td.n{text-align:right;white-space:nowrap;font-variant-numeric:tabular-nums;font-weight:700;width:5.5em}
table.bd tr.sum td{border-bottom:0;font-weight:700}
table.bd .mini{display:inline-flex;gap:1px;vertical-align:middle;margin-left:6px}
table.bd .mini img{width:20px;height:auto}
table.bd small{color:var(--muted)}
.calc{margin:0;font-size:14px;line-height:1.8;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-variant-numeric:tabular-nums}
.calc b{font-size:16px}
.note{margin:0;font-size:14px;border-left:3px solid var(--accent);padding:2px 0 2px 10px}
.code{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.code code{font-family:ui-monospace,Menlo,Consolas,monospace;background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:4px 10px;user-select:all;overflow-wrap:anywhere;min-width:0}
.btn{border:1px solid var(--line);background:var(--surface);border-radius:8px;padding:6px 14px}
.btn.primary{background:var(--felt);border-color:var(--felt);color:var(--felt-ink);font-weight:700;padding:10px 22px;font-size:16px}
.btn:disabled{opacity:.45;cursor:default}
.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}

details.rules{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-size:14px}
details.rules summary{cursor:pointer;font-weight:700}
table.rt{width:100%;border-collapse:collapse;margin-top:10px;font-size:13px}
table.rt th,table.rt td{border-bottom:1px solid var(--line);padding:6px 4px;text-align:left}
table.rt th{color:var(--muted);font-weight:500}

.mine{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;display:flex;flex-direction:column;gap:14px}
.mine-head{display:flex;justify-content:space-between;align-items:baseline;gap:8px;flex-wrap:wrap}
.mine h2{margin:0;font-family:var(--f-tile);font-size:20px;font-weight:800}
.mine-head small{font-size:12px;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
@media (max-width:480px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{border:1px solid var(--line);border-radius:8px;padding:8px 12px;display:flex;flex-direction:column}
.stat span{font-size:12px;color:var(--muted)}
.stat b{font-size:22px;font-variant-numeric:tabular-nums;line-height:1.3}
.stat b small{font-size:13px;font-weight:500;margin-left:2px}
.bars{display:flex;flex-direction:column;gap:6px}
.bar{display:grid;grid-template-columns:6.5em 1fr 7.5em;gap:10px;align-items:center;font-size:13px}
@media (max-width:480px){.bar{grid-template-columns:5.5em 1fr auto;gap:8px;font-size:12px}}
.bar .lab{color:var(--muted)}
.bar .track{height:10px;border-radius:5px;background:var(--paper);border:1px solid var(--line);overflow:hidden}
.bar .fill{height:100%;background:var(--felt)}
.bar .fill.weak{background:var(--ng)}
.bar .val{text-align:right;font-variant-numeric:tabular-nums}
.bar.empty .val{color:var(--muted)}
.weakmsg{margin:0;font-size:14px}
.weakmsg b{color:var(--ng)}
.danger{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.btn.warn{border-color:var(--ng);color:var(--ng)}
footer{font-size:12px;color:var(--muted);text-align:center;border-top:1px solid var(--line);padding-top:14px}
footer a{color:inherit;text-underline-offset:3px}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}