/* Layout: phone-first single column, fixed bottom tab bar; cards are 田字格 sheets; pinyin coloured by tone */
:root{
  --bg:#f2f5f3; --surface:#ffffff; --surface2:#e9eeeb; --ink:#1c2421; --muted:#647069; --line:#d3dbd6; --grid:#e6bdb7;
  --accent:#1f6b55; --accent-ink:#ffffff; --accent-soft:#dcece5;
  --t1:#c8322b; --t2:#b87300; --t3:#2c8a3e; --t4:#2a5fb8; --t0:#8a918d;
  --ok:#2c8a3e; --warn:#b87300; --bad:#c8322b;
  --f-han:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;
  --f-ui:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,sans-serif;
  --r:16px; --tab-h:58px;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#121715; --surface:#1b221f; --surface2:#242d29; --ink:#e6ece9; --muted:#9aa59f; --line:#2e3833; --grid:#5b3632;
  --accent:#5fbf9c; --accent-ink:#0e1412; --accent-soft:#1f3229;
  --t1:#ff6e66; --t2:#f0a838; --t3:#62c876; --t4:#74a2f2; --t0:#8f9994;
  --ok:#62c876; --warn:#f0a838; --bad:#ff6e66; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#121715; --surface:#1b221f; --surface2:#242d29; --ink:#e6ece9; --muted:#9aa59f; --line:#2e3833; --grid:#5b3632;
  --accent:#5fbf9c; --accent-ink:#0e1412; --accent-soft:#1f3229;
  --t1:#ff6e66; --t2:#f0a838; --t3:#62c876; --t4:#74a2f2; --t0:#8f9994;
  --ok:#62c876; --warn:#f0a838; --bad:#ff6e66; color-scheme:dark}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.45 var(--f-ui);-webkit-text-size-adjust:100%;overscroll-behavior-y:none}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--accent)}
.han{font-family:var(--f-han)}
[hidden]{display:none!important}

/* ---------- Каркас ---------- */
.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;gap:8px;
  padding:calc(env(safe-area-inset-top,0px) + 8px) 12px 8px;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent}
.top h1{flex:1;margin:0;font-size:1.15rem;font-weight:650;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.icon-btn{width:40px;height:40px;border-radius:12px;border:0;background:none;display:grid;place-items:center;color:var(--ink);cursor:pointer;flex:none}
.icon-btn svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
main{padding:8px 16px calc(var(--tab-h) + env(safe-area-inset-bottom,0px) + 24px);max-width:640px;margin:0 auto;outline:none}
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:6;display:grid;grid-template-columns:repeat(5,1fr);
  padding:4px 4px calc(env(safe-area-inset-bottom,0px) + 4px);background:color-mix(in srgb,var(--surface) 94%,transparent);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-top:1px solid var(--line)}
.tabbar a{display:flex;flex-direction:column;align-items:center;gap:1px;padding:5px 0;text-decoration:none;color:var(--muted);font-size:.68rem;font-weight:500;border-radius:10px}
.tabbar .g{font:600 1.25rem/1.2 var(--f-han)}
.tabbar a.on{color:var(--accent)}
body.focus .tabbar{display:none}
body.focus main{padding-bottom:calc(env(safe-area-inset-bottom,0px) + 24px)}
.loading{padding:60px 0;text-align:center;color:var(--muted);font:1.4rem var(--f-han)}

/* ---------- Общие элементы ---------- */
.stack{display:flex;flex-direction:column;gap:12px}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.between{justify-content:space-between}
.grow{flex:1;min-width:0}
.sec{font-size:.75rem;letter-spacing:.07em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:14px 2px 2px}
.muted{color:var(--muted)}
.small{font-size:.85rem}
.tiny{font-size:.75rem}
.box{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px}
.list{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.item{display:flex;align-items:center;gap:12px;padding:12px 14px;text-decoration:none;color:var(--ink);border-top:1px solid var(--line);min-height:56px;background:none;border-left:0;border-right:0;border-bottom:0;width:100%;text-align:left;cursor:pointer}
.item:first-child{border-top:0}
.item .lead{font:500 1.6rem/1 var(--f-han);min-width:2.2em;text-align:center}
.item .main{flex:1;min-width:0}
.item .t{font-weight:550}
.item .s{font-size:.82rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chev{color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--surface);border-radius:14px;padding:12px 16px;cursor:pointer;font-weight:550;text-decoration:none;color:var(--ink);min-height:48px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.ghost{background:none}
.btn.block{width:100%}
.btn[disabled]{opacity:.45;cursor:default}
.btn.bad{border-color:var(--bad);color:var(--bad)}
.btn.ok{border-color:var(--ok);color:var(--ok)}
.btn.warn{border-color:var(--warn);color:var(--warn)}
.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.grades .btn{flex-direction:column;gap:0;padding:8px 4px;font-size:.9rem}
.grades .btn small{font-weight:400;font-size:.7rem;color:var(--muted)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:6px 12px;cursor:pointer;font-size:.85rem;white-space:nowrap}
.chip[aria-pressed="true"],.chip.on{border-color:var(--accent);background:var(--accent-soft)}
.chips{display:flex;gap:6px;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.pill{display:inline-block;font-size:.7rem;font-weight:600;padding:2px 8px;border-radius:999px;background:var(--surface2);color:var(--muted)}
.pill.ok{background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok)}
.pill.warn{background:color-mix(in srgb,var(--warn) 16%,transparent);color:var(--warn)}
.pill.acc{background:var(--accent-soft);color:var(--accent)}
.bar{height:6px;background:var(--surface2);border-radius:6px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);border-radius:6px;transition:width .3s}
.say{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface2);display:inline-grid;place-items:center;cursor:pointer;flex:none;color:var(--ink)}
.say svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.say.sm{width:34px;height:34px}
.say.sm svg{width:16px;height:16px}
.say.playing{border-color:var(--accent);color:var(--accent)}
.say svg rect{fill:none}
[data-rec].playing{border-color:var(--bad);color:var(--bad)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input[type=text],input[type=search],select{width:100%;border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:12px 14px;font-size:1rem}
input[type=range]{width:100%;accent-color:var(--accent)}
.empty{text-align:center;color:var(--muted);padding:30px 10px}
#toast{position:fixed;left:50%;bottom:calc(var(--tab-h) + env(safe-area-inset-bottom,0px) + 16px);transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:12px;font-size:.9rem;opacity:0;pointer-events:none;transition:.25s;z-index:20;max-width:90vw}
#toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Пиньинь и тоны ---------- */
.tone1{color:var(--t1)}.tone2{color:var(--t2)}.tone3{color:var(--t3)}.tone4{color:var(--t4)}.tone0{color:var(--t0)}
.notone .tone1,.notone .tone2,.notone .tone3,.notone .tone4,.notone .tone0{color:inherit}
.py{letter-spacing:.01em}

/* ---------- Карточка 田字格 ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px 16px;display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;min-height:280px;justify-content:center}
.grids{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.tz{width:92px;height:92px;border:1.5px solid var(--grid);display:grid;place-items:center;font:400 60px/1 var(--f-han);
  background:linear-gradient(var(--grid),var(--grid)) center/100% 1px no-repeat,linear-gradient(var(--grid),var(--grid)) center/1px 100% no-repeat}
.tz.lg{width:132px;height:132px;font-size:92px}
.grids.sm .tz{width:64px;height:64px;font-size:42px}
.big-py{font-size:1.6rem}
.big-ru{font-size:1.3rem;font-weight:550}
.hint{font-size:.82rem;color:var(--muted)}
.parts{display:flex;flex-direction:column;gap:6px;width:100%;text-align:left}
.part{display:flex;gap:10px;align-items:flex-start;background:var(--surface2);border-radius:12px;padding:10px 12px}
.part .c{font:500 1.6rem/1 var(--f-han);min-width:1.4em;text-align:center}
.part .d{font-size:.9rem;min-width:0}

/* ---------- Сегодня ---------- */
.hero{background:var(--accent);color:var(--accent-ink);border-radius:20px;padding:18px;display:flex;flex-direction:column;gap:12px}
.hero .big{font-size:2rem;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}
.hero .bar{background:color-mix(in srgb,var(--accent-ink) 25%,transparent)}
.hero .bar i{background:var(--accent-ink)}
.hero .btn{background:var(--accent-ink);color:var(--accent);border:0}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px 12px}
.stat b{display:block;font-size:1.25rem;font-variant-numeric:tabular-nums}
.stat span{font-size:.72rem;color:var(--muted)}
.plan .item .lead{font-size:1.3rem}
.done-mark{color:var(--ok);font-weight:700}

/* ---------- Тексты ---------- */
.stages{display:grid;grid-template-columns:repeat(5,1fr);gap:4px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px}
.stages button{border:0;background:none;border-radius:10px;padding:7px 2px;font-size:.72rem;line-height:1.15;cursor:pointer;color:var(--muted)}
.stages button b{display:block;font-size:.95rem;color:var(--ink)}
.stages button.on{background:var(--accent);color:var(--accent-ink)}
.stages button.on b{color:var(--accent-ink)}
.stages button.passed b::after{content:" ✓";color:var(--ok)}
.stages button.on.passed b::after{color:var(--accent-ink)}
.lines{display:flex;flex-direction:column;gap:10px}
.ln{display:grid;grid-template-columns:30px minmax(0,1fr) 34px;gap:10px;align-items:start;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 10px 12px 12px}
.ln.now{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.who{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:.8rem;font-weight:700;background:var(--accent-soft);color:var(--accent)}
.ln.b .who{background:color-mix(in srgb,var(--t4) 16%,transparent);color:var(--t4)}
.ln.n .who{background:var(--surface2);color:var(--muted)}
.ln .body{min-width:0;display:flex;flex-direction:column;gap:6px}
.zh{font:400 1.45rem/2.3 var(--f-han);word-break:keep-all}
.zh.nopy{line-height:1.6}
.zh ruby{ruby-position:over;margin:0 1px;cursor:pointer}
.zh rt{font:400 .55em/1 var(--f-ui);letter-spacing:.02em;text-align:center}
.zh .tok{cursor:pointer;border-radius:4px}
.zh .tok.peek{background:var(--accent-soft)}
.ru-line{color:var(--muted);font-size:.95rem}
.ru-line.cover{background:var(--surface2);color:transparent;border-radius:8px;user-select:none;cursor:pointer}
.ru-line.main{color:var(--ink);font-size:1.02rem;font-weight:500}
.cover-zh{background:var(--surface2);border-radius:10px;padding:10px;color:var(--muted);font-size:.85rem;cursor:pointer}
.player{position:sticky;bottom:calc(var(--tab-h) + env(safe-area-inset-bottom,0px) + 8px);display:flex;gap:8px;align-items:center;justify-content:center;
  background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:16px;padding:8px;margin-top:6px}
.player .btn{min-height:40px;padding:8px 10px;font-size:.88rem;white-space:nowrap;flex:1}
.player .btn svg{width:14px;height:14px;fill:currentColor}
.gram{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px}
.gram h3{margin:0 0 6px;font-size:1rem}
.gram .ex{font-family:var(--f-han);font-size:1.05rem}
.gram p{margin:6px 0}
.pop{position:fixed;left:12px;right:12px;bottom:calc(var(--tab-h) + env(safe-area-inset-bottom,0px) + 12px);z-index:15;background:var(--surface);border:1px solid var(--line);
  border-radius:18px;padding:14px;box-shadow:0 10px 40px rgba(0,0,0,.18);display:flex;gap:12px;align-items:center;max-width:616px;margin:0 auto}
body.focus .pop{bottom:calc(env(safe-area-inset-bottom,0px) + 12px)}
.pop .h{font:500 2rem/1 var(--f-han)}

/* ---------- Ключи ---------- */
.rgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(66px,1fr));gap:8px}
.rcell{aspect-ratio:1;max-width:100%;background:var(--surface);border:1px solid var(--line);border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-decoration:none;color:var(--ink);position:relative}
.rcell .g{font:400 1.7rem/1.1 var(--f-han)}
.rcell .m{font-size:.62rem;color:var(--muted);max-width:92%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rcell .n{position:absolute;top:3px;left:6px;font-size:.58rem;color:var(--muted);font-variant-numeric:tabular-nums}
.rcell.known{border-color:var(--ok)}
.rcell.known::after{content:"";position:absolute;top:6px;right:6px;width:6px;height:6px;border-radius:50%;background:var(--ok)}
.rcell.learning::after{content:"";position:absolute;top:6px;right:6px;width:6px;height:6px;border-radius:50%;background:var(--warn)}
.writer{width:200px;height:200px;max-width:100%;border:1.5px solid var(--grid);border-radius:6px;
  background:linear-gradient(var(--grid),var(--grid)) center/100% 1px no-repeat,linear-gradient(var(--grid),var(--grid)) center/1px 100% no-repeat}
.variants{display:flex;gap:10px;justify-content:center;font:400 2rem var(--f-han)}
.variants span{background:var(--surface2);border-radius:10px;padding:2px 10px}
.exs{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:8px;width:100%}
.ex{display:flex;gap:8px;align-items:center;background:var(--surface2);border-radius:12px;padding:8px 10px;text-align:left;border:0;cursor:pointer;color:var(--ink)}
.ex .c{font:500 1.6rem/1 var(--f-han)}
.ex .d{font-size:.8rem;min-width:0}

/* ---------- Ввод пиньиня ---------- */
.typer{display:flex;flex-direction:column;gap:10px}
.typer input{font-size:1.25rem;text-align:center;letter-spacing:.03em;padding:14px}
.preview{min-height:1.8em;text-align:center;font-size:1.4rem}
.tonekeys{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.tonekeys button{border:1px solid var(--line);background:var(--surface);border-radius:12px;height:52px;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:1.25rem;line-height:1}
.tonekeys button small{font-size:.65rem;color:var(--muted);margin-top:3px}
.verdict{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;font-size:1.4rem}
.syl{padding:2px 8px;border-radius:8px}
.syl.ok{background:color-mix(in srgb,var(--ok) 16%,transparent)}
.syl.tone{background:color-mix(in srgb,var(--warn) 18%,transparent)}
.syl.bad{background:color-mix(in srgb,var(--bad) 16%,transparent)}
.pairgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.pairgrid button{border:1px solid var(--line);background:var(--surface);border-radius:10px;height:46px;cursor:pointer;font-weight:600;font-variant-numeric:tabular-nums}
.pairgrid button.ok{background:var(--ok);color:var(--surface);border-color:var(--ok)}
.pairgrid button.bad{background:var(--bad);color:var(--surface);border-color:var(--bad)}
.contour{display:flex;gap:4px;justify-content:center}
.contour svg{width:34px;height:24px;stroke:currentColor;fill:none;stroke-width:2.5;stroke-linecap:round}

@media (max-width:380px){.tz{width:76px;height:76px;font-size:50px}.tz.lg{width:110px;height:110px;font-size:78px}.zh{font-size:1.3rem}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}