:root{--bg: #f6f3ee;--fg: #1d1b19;--muted: #77716a;--surface: #ffffff;--line: #e2ddd5;--accent: #b8322a;--again: #c0392b;--hard: #b7791f;--good: #2f7d4f;--easy: #2b6cb0;--c-new: #2b6cb0;--c-learn: #c0392b;--c-due: #2f7d4f;--cjk: "PingFang SC", "Noto Sans SC", "Noto Sans CJK SC", "Source Han Sans SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;color-scheme:light dark}@media (prefers-color-scheme: dark){:root{--bg: #1b1a19;--fg: #ece8e2;--muted: #9b948b;--surface: #262422;--line: #3a3734;--accent: #e0675d;--again: #e06a5e;--hard: #d9a441;--good: #5fb67f;--easy: #6aa5e6;--c-new: #6aa5e6;--c-learn: #e06a5e;--c-due: #5fb67f}}*{box-sizing:border-box}html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);font-family:var(--ui);-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}#app{display:flex;flex-direction:column;min-height:100%;min-height:100dvh;max-width:40rem;margin:0 auto;padding:env(safe-area-inset-top) max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left))}button,input,select{font:inherit;color:inherit}button{cursor:pointer;border:none;background:none;touch-action:manipulation}.banner{position:sticky;top:0;z-index:10;padding:calc(env(safe-area-inset-top) + 8px) 16px 8px;background:var(--hard);color:#fff;text-align:center;font-size:.9rem}.top{display:flex;align-items:center;justify-content:space-between;padding:8px 0}.icon{width:44px;height:44px;display:grid;place-items:center;font-size:1.4rem;color:var(--muted);text-decoration:none;border-radius:50%}.icon:active{background:var(--line)}.counts{display:flex;gap:1rem;font-variant-numeric:tabular-nums;font-weight:600}.c-new{color:var(--c-new)}.c-learn{color:var(--c-learn)}.c-due{color:var(--c-due)}.card{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:.75rem;padding:1rem 0 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max(12px,env(safe-area-inset-bottom));background:var(--bg)}.show{width:100%;min-height:60px;border-radius:14px;background:var(--fg);color:var(--bg);font-size:1.15rem;font-weight:600}.show:active{opacity:.85}.show:disabled{opacity:.5}.ratings{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.rate{min-height:64px;border-radius:14px;color:#fff;font-weight:600;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}.rate .ivl{font-size:.75rem;font-weight:400;opacity:.9}.rate:active{filter:brightness(.9)}.again{background:var(--again)}.hard{background:var(--hard)}.good{background:var(--good)}.easy{background:var(--easy)}.done{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:.25rem;padding-bottom:4rem}.done h1{margin:.5rem 0}.done-mark{font-family:var(--cjk);font-size:64px;color:var(--accent);text-align:center}.muted{color:var(--muted)}.small{font-size:.85rem}.error{color:var(--again)}.login,.settings{display:flex;flex-direction:column;gap:1rem;padding:2rem 0 max(2rem,env(safe-area-inset-bottom))}.login{flex:1;justify-content:center}label{display:flex;flex-direction:column;gap:.35rem;font-size:.9rem;color:var(--muted)}input:not([type=checkbox]),select{min-height:48px;padding:0 .75rem;border:1px solid var(--line);border-radius:10px;background:var(--surface);font-size:1rem}fieldset{border:1px solid var(--line);border-radius:10px;padding:.5rem .75rem}legend{color:var(--muted);font-size:.9rem}label.check{flex-direction:row;align-items:center;gap:.6rem;min-height:44px;font-size:1rem;color:var(--fg)}label.check input{width:22px;height:22px}.secondary,.button-link{min-height:48px;display:grid;place-items:center;border:1px solid var(--line);border-radius:14px;color:var(--fg);text-decoration:none}.settings hr{width:100%;border:none;border-top:1px solid var(--line)}.top-right{display:flex;align-items:center}.streak{display:flex;align-items:center;gap:2px;min-height:44px;padding:0 8px;border-radius:999px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--hard);text-decoration:none}.streak.at-risk{filter:grayscale(1);opacity:.6}.toast{position:fixed;left:50%;top:calc(env(safe-area-inset-top) + 64px);transform:translate(-50%);z-index:20;padding:10px 18px;border-radius:999px;background:var(--fg);color:var(--bg);font-weight:700;box-shadow:0 6px 24px #0003;animation:toast-in .35s cubic-bezier(.2,1.4,.4,1);transition:opacity .4s,transform .4s}.toast.out{opacity:0;transform:translate(-50%) translateY(-12px)}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(-16px) scale(.9)}}.center{text-align:center}.stats{padding-bottom:max(2rem,env(safe-area-inset-bottom))}.board{list-style:none;margin:.5rem 0;padding:0;display:flex;flex-direction:column;gap:8px}.board li{display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.board li.me{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}.board .rank{font-size:1.6rem;width:2rem;text-align:center}.board .who{flex:1;min-width:0}.board .name{font-weight:700;font-size:1.1rem}.board .sub{font-size:.85rem;color:var(--muted)}.you{margin-left:6px;padding:1px 6px;border-radius:6px;background:var(--accent);color:#fff;font-size:.7rem;vertical-align:middle}.risk{color:var(--again)}.board .score{display:flex;flex-direction:column;align-items:flex-end;font-variant-numeric:tabular-nums}.board .score strong{font-size:1.5rem}.board .score span{font-size:.7rem;color:var(--muted)}.nudge{margin:.25rem 0 1rem;text-align:center;font-weight:600}.profile{margin-top:1.5rem;padding-top:1rem;border-top:1px solid var(--line)}.profile h2{margin:0 0 .75rem;font-size:1.1rem}.streak-hero{display:flex;align-items:center;gap:12px;margin-bottom:1rem}.streak-hero .flame{font-size:3rem;line-height:1}.streak-hero.at-risk .flame{filter:grayscale(1);opacity:.6}.streak-num{font-size:1.8rem;font-weight:800}.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:1rem}.tile{padding:10px;border:1px solid var(--line);border-radius:12px;background:var(--surface);text-align:center}.tile-value{font-size:1.3rem;font-weight:700;font-variant-numeric:tabular-nums}.tile-label{font-size:.75rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.tile-sub{font-size:.75rem;color:var(--muted)}.heatmap{display:grid;grid-template-rows:repeat(7,1fr);grid-auto-flow:column;grid-auto-columns:1fr;gap:2px;margin-bottom:1rem}.hm{aspect-ratio:1;border-radius:2px;background:var(--line)}.hm.pad{background:transparent}.hm.l1{background:color-mix(in srgb,var(--good) 30%,var(--line))}.hm.l2{background:color-mix(in srgb,var(--good) 55%,var(--line))}.hm.l3{background:color-mix(in srgb,var(--good) 80%,var(--line))}.hm.l4{background:var(--good)}.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:8px}.badge{padding:10px 6px;border:1px dashed var(--line);border-radius:12px;text-align:center;opacity:.75}.badge .badge-icon{font-size:1.8rem;filter:grayscale(1);opacity:.5}.badge.earned{border-style:solid;border-color:var(--hard);background:var(--surface);opacity:1}.badge.earned .badge-icon{filter:none;opacity:1}.badge-title{font-weight:700;font-size:.85rem}.badge-desc{font-size:.7rem;color:var(--muted)}.bar{height:4px;margin:4px 6px 2px;border-radius:2px;background:var(--line);overflow:hidden}.bar span{display:block;height:100%;background:var(--hard)}.mini-board{margin-top:1.5rem;width:100%;max-width:22rem;padding:12px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--fg);text-decoration:none;display:flex;flex-direction:column;gap:6px}.mini-board>div:not(.muted):not(.link){display:flex;justify-content:space-between}.mini-board .me{font-weight:700}.mini-board .link{color:var(--accent);text-align:right}