:root{--bg: oklch(.13 .012 285);--surface: oklch(.18 .014 285);--surface-2: oklch(.22 .016 285);--ink: oklch(.96 .005 285);--ink-2: oklch(.86 .01 285);--muted: oklch(.7 .015 285);--line: oklch(.3 .015 285);--accent: oklch(.62 .21 295);--accent-ink: #fff;--danger: oklch(.6 .21 25);--ok: oklch(.7 .17 155);--r-ctl: 10px;--r-card: 14px;--pad-card: clamp(24px, 7vw, 56px);--spine-w: 12px;--col-w: 520px;--z-rail: 5;--z-topbar: 20;--z-sheet: 40;--z-toast: 60;--ease-out: cubic-bezier(.22, 1, .36, 1);--t-fast: .16s;--t-med: .24s;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{margin:0;height:100%;background:var(--bg);color:var(--ink);overscroll-behavior-y:none}body{font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.feed{height:100dvh;overflow-y:scroll;scroll-snap-type:y mandatory;scrollbar-width:none}.feed::-webkit-scrollbar{display:none}.card{position:relative;height:100dvh;scroll-snap-align:start;scroll-snap-stop:always;display:flex;flex-direction:column;justify-content:center;padding:var(--pad-card);padding-left:calc(var(--pad-card) + var(--spine-w));padding-bottom:calc(var(--pad-card) + 24px);overflow:hidden;animation:cardIn .26s var(--ease-out)}@keyframes cardIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}.card .spine{position:absolute;left:0;top:0;bottom:0;width:var(--spine-w);box-shadow:inset -3px 0 6px #00000059}.card .bg-glow{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1}.card .kicker{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;padding:7px 14px;border-radius:999px;background:#ffffff17;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);font-size:13px;font-weight:600;letter-spacing:.01em;margin-bottom:22px}.card .kicker.wow{background:linear-gradient(90deg,#f59e0b,#ec4899);color:#fff;font-weight:800}.card.wow h1{color:#ffe08a}.card h1{font-size:clamp(26px,6.5vw,40px);line-height:1.14;margin:0 0 16px;font-weight:800;letter-spacing:-.025em;max-width:16ch;text-wrap:balance}.card .body{font-size:clamp(17px,4.4vw,19px);line-height:1.6;color:var(--ink-2);max-width:34ch;text-wrap:pretty;margin:0}.card .source{margin-top:24px;font-size:13px;font-weight:500;color:var(--muted);display:inline-flex;align-items:center;gap:6px;max-width:60vw}.deeper-btn{align-self:flex-start;margin-top:22px;padding:10px 18px;border-radius:999px;border:1px solid rgba(255,255,255,.22);background:#ffffff14;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;font-weight:600;font-size:14px;transition:transform var(--t-fast) var(--ease-out),background var(--t-fast) var(--ease-out)}.deeper-btn:hover{background:#ffffff29}.deeper-btn:active{transform:scale(.96)}.rail{position:absolute;right:12px;bottom:96px;display:flex;flex-direction:column;gap:18px;align-items:center;z-index:var(--z-rail)}.rail button{background:none;border:none;color:#fff;display:flex;flex-direction:column;align-items:center;gap:5px;font-size:11px;font-weight:500;padding:0}.rail .icon{width:50px;height:50px;border-radius:50%;background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:grid;place-items:center;font-size:22px;transition:transform var(--t-fast) var(--ease-out),background var(--t-fast) var(--ease-out)}.rail button:active .icon{transform:scale(.85)}.rail .icon.on{background:#ff3b5c47}.swipe-hint{position:absolute;top:96px;padding:8px 18px;border-radius:999px;font-weight:800;font-size:16px;z-index:6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:2px solid}.swipe-hint.know{right:20px;color:var(--ok);border-color:var(--ok);background:color-mix(in oklab,var(--ok) 22%,transparent);transform:rotate(8deg)}.swipe-hint.dont_know{left:26px;color:#52a9fe;border-color:#52a9fe;background:color-mix(in oklab,oklch(.72 .15 250) 22%,transparent);transform:rotate(-8deg)}.know-bar{position:absolute;left:50%;bottom:calc(52px + env(safe-area-inset-bottom));transform:translate(-50%);display:flex;gap:10px;z-index:5}.know-btn{padding:9px 16px;border-radius:999px;border:1px solid rgba(255,255,255,.22);background:#ffffff14;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;font-weight:600;font-size:13px;transition:transform var(--t-fast) var(--ease-out),background var(--t-fast) var(--ease-out)}.know-btn:active{transform:scale(.94)}.know-btn.know{border-color:color-mix(in oklab,var(--ok) 60%,transparent)}.know-btn.dont{border-color:color-mix(in oklab,oklch(.72 .15 250) 60%,transparent)}.heart-burst{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;pointer-events:none;z-index:calc(var(--z-rail) + 1)}.heart-burst span{font-size:110px;filter:drop-shadow(0 6px 24px rgba(255,59,92,.45));animation:burst .6s var(--ease-out) forwards}@keyframes burst{0%{transform:scale(.3);opacity:0}30%{transform:scale(1.12);opacity:1}70%{transform:scale(1);opacity:1}to{transform:scale(1.25);opacity:0}}.topbar{position:fixed;top:0;left:0;right:0;z-index:var(--z-topbar);padding:max(10px,env(safe-area-inset-top)) 14px 10px;background:linear-gradient(to bottom,#0a0a0ef0 30%,#0a0a0e00);pointer-events:none}.topbar-inner{max-width:var(--col-w);margin-inline:auto}.topbar-row{display:flex;align-items:center;justify-content:space-between;pointer-events:auto}.brand{font-weight:800;font-size:19px;letter-spacing:-.02em}.brand span{color:var(--accent)}.top-actions{display:flex;align-items:center;gap:8px}.streak-pill{display:inline-flex;align-items:center;gap:5px;background:#ffffff1a;padding:6px 12px;border-radius:999px;font-weight:700;font-size:13px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.icon-btn{width:38px;height:38px;border-radius:50%;border:none;background:#ffffff1a;color:#fff;font-size:17px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);display:grid;place-items:center;transition:background var(--t-fast) var(--ease-out)}.icon-btn:hover{background:#ffffff2e}.stories{display:flex;gap:12px;overflow-x:auto;padding:12px 2px 6px;scrollbar-width:none;pointer-events:auto}.stories::-webkit-scrollbar{display:none}.story{display:flex;flex-direction:column;align-items:center;gap:6px;flex:0 0 auto;width:64px;background:none;border:none;color:inherit;padding:0}.story .ring{width:58px;height:58px;border-radius:50%;padding:2.5px;display:grid;place-items:center;transition:transform var(--t-fast) var(--ease-out),opacity var(--t-fast) var(--ease-out)}.story.active .ring{transform:scale(1.07)}.story .inner{width:100%;height:100%;border-radius:50%;background:var(--surface);display:grid;place-items:center;font-size:24px;border:2.5px solid var(--bg)}.story .label{font-size:11px;font-weight:500;color:var(--muted);max-width:64px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:center}.story.active .label{color:var(--ink);font-weight:600}.story .ring.dim{opacity:.45}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:var(--z-sheet);background:#0009;display:flex;align-items:flex-end;justify-content:center;animation:fade var(--t-fast) ease-out}@keyframes fade{0%{opacity:0}to{opacity:1}}.sheet{width:100%;max-width:var(--col-w);background:var(--surface);border-radius:20px 20px 0 0;padding:8px 18px calc(20px + env(safe-area-inset-bottom));max-height:82dvh;overflow-y:auto;animation:slideUp var(--t-med) var(--ease-out)}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:none}}.sheet .grip{width:40px;height:4px;border-radius:2px;background:var(--line);margin:8px auto 18px}.sheet h3{margin:8px 2px 12px;font-size:13px;color:var(--muted);font-weight:600;text-transform:none}.preset-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}.preset{padding:9px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);font-weight:600;font-size:14px;transition:background var(--t-fast) ease-out,border-color var(--t-fast) ease-out}.preset.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.cat-check{display:flex;align-items:center;gap:12px;padding:13px 6px;border-bottom:1px solid var(--line)}.cat-check:last-of-type{border-bottom:none}.cat-check .dot{width:13px;height:13px;border-radius:50%;flex:0 0 auto}.cat-check .cc-label{flex:1;font-weight:600;font-size:15px}.cat-check .count{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}.cat-check input{width:21px;height:21px;accent-color:var(--accent)}.sheet-apply{position:sticky;bottom:0;margin-top:14px;width:100%;padding:15px;border-radius:var(--r-card);border:none;background:var(--accent);color:var(--accent-ink);font-weight:700;font-size:16px}.explain-sheet{text-align:left}.explain-modes{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.explain-modes button{padding:9px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);font-weight:600;font-size:13px}.explain-modes button.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.explain-body{font-size:16px;line-height:1.6;color:var(--ink-2);min-height:60px;padding-bottom:8px}.explain-loading{display:flex;align-items:center;gap:10px;color:var(--muted);font-weight:600}.explain-loading .spinner{width:20px;height:20px;border-width:2px}.quiz-opts{display:flex;flex-direction:column;gap:10px;margin-top:4px;max-width:36ch;width:100%}.quiz-opt{display:flex;align-items:center;gap:12px;text-align:left;padding:13px 16px;border-radius:var(--r-card);border:1px solid rgba(255,255,255,.22);background:#ffffff12;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);color:#fff;font-size:15px;font-weight:500;transition:background var(--t-fast) ease-out,border-color var(--t-fast) ease-out,transform var(--t-fast) var(--ease-out)}.quiz-opt:active{transform:scale(.98)}.quiz-opt .qletter{flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:#ffffff24;font-size:12px;font-weight:700}.quiz-opt.correct{background:color-mix(in oklab,var(--ok) 30%,transparent);border-color:var(--ok)}.quiz-opt.wrong{background:color-mix(in oklab,var(--danger) 26%,transparent);border-color:var(--danger)}.quiz-expl{margin-top:16px;font-size:15px;color:var(--ink-2);max-width:36ch;line-height:1.55}.center-msg{height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;color:var(--muted);text-align:center;padding:30px}.spinner{width:34px;height:34px;border-radius:50%;background:conic-gradient(from 0deg,transparent 0%,var(--accent) 90%);-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 4px),#000 calc(100% - 3px));mask:radial-gradient(farthest-side,transparent calc(100% - 4px),#000 calc(100% - 3px));animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.card-skeleton{position:relative;height:100dvh;display:flex;flex-direction:column;justify-content:center;gap:14px;padding:var(--pad-card);padding-left:calc(var(--pad-card) + var(--spine-w));max-width:var(--col-w);margin-inline:auto}.sk-spine{background:linear-gradient(180deg,var(--surface-2),var(--surface))}.sk{background:linear-gradient(90deg,var(--surface) 25%,var(--surface-2) 37%,var(--surface) 63%);background-size:400% 100%;animation:shimmer 1.5s ease infinite;border-radius:8px}@keyframes shimmer{0%{background-position:100% 0}to{background-position:-100% 0}}.sk-pill{width:150px;height:32px;border-radius:999px}.sk-title{width:72%;height:34px}.sk-title.short{width:46%}.sk-line{width:90%;height:16px}.sk-line.s2{width:82%}.sk-line.s3{width:58%}.sk-note{margin-top:22px;font-size:13px;color:var(--muted);max-width:280px}@media (prefers-reduced-motion: reduce){.sk{animation:none}}.pull-hint{position:fixed;top:88px;left:50%;transform:translate(-50%);z-index:calc(var(--z-topbar) - 1);background:#ffffff1f;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:8px 16px;border-radius:999px;font-size:13px;font-weight:600}.position-counter{position:fixed;bottom:calc(16px + env(safe-area-inset-bottom));left:50%;transform:translate(-50%);z-index:calc(var(--z-topbar) - 1);font-size:12px;color:var(--muted);font-weight:600;font-variant-numeric:tabular-nums;background:#0a0a0e80;padding:5px 12px;border-radius:999px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.toast{position:fixed;bottom:calc(76px + env(safe-area-inset-bottom));left:50%;transform:translate(-50%);z-index:var(--z-toast);background:var(--surface-2);border:1px solid var(--line);padding:12px 18px;border-radius:var(--r-card);font-weight:600;font-size:14px;max-width:min(88vw,440px);animation:fade var(--t-fast) ease-out}@media (min-width: 900px){body{background:radial-gradient(60% 50% at 50% 0%,color-mix(in oklab,var(--accent) 10%,transparent),transparent 70%),var(--bg)}.feed{max-width:var(--col-w);margin-inline:auto;border-inline:1px solid var(--line)}.card{--pad-card: 48px}.card h1{font-size:36px}.rail{right:16px}.sheet{border-radius:20px;margin-bottom:24px}}.admin{max-width:1100px;margin:0 auto;padding:24px 18px 80px;font-size:14px}.admin h1{font-size:24px;letter-spacing:-.02em;margin:6px 0 4px}.admin .sub{color:var(--muted);margin-bottom:20px}.admin .tabs{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}.admin .tab{padding:9px 16px;border-radius:var(--r-ctl);border:1px solid var(--line);background:var(--surface);color:var(--ink);font-weight:600;font-size:14px;transition:background var(--t-fast) ease-out}.admin .tab:hover{background:var(--surface-2)}.admin .tab.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.admin .info-box{background:color-mix(in oklab,var(--accent) 8%,var(--surface));border:1px solid color-mix(in oklab,var(--accent) 30%,var(--line));border-radius:var(--r-card);padding:14px 16px;margin-bottom:16px}.admin .info-box strong{font-size:14px}.admin .info-box p{margin:6px 0 0;line-height:1.5}.admin .info-box code{background:var(--surface-2);padding:1px 6px;border-radius:5px;font-size:12px}.admin .toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}.admin .row-muted td{opacity:.6}.admin .chip-local{display:inline-block;margin-left:8px;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;background:var(--surface-2);color:var(--muted);border:1px solid var(--line);vertical-align:middle}.admin .err-text{max-width:240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:3px}.table-wrap{overflow-x:auto;border-radius:var(--r-card);border:1px solid var(--line)}.admin table{width:100%;border-collapse:collapse;background:var(--surface);min-width:640px}.admin th,.admin td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);font-size:13.5px;vertical-align:middle}.admin tr:last-child td{border-bottom:none}.admin th{color:var(--muted);font-weight:600;background:var(--surface-2);white-space:nowrap;position:sticky;top:0}.admin tbody tr{transition:background var(--t-fast) ease-out}.admin tbody tr:hover{background:color-mix(in oklab,var(--accent) 5%,transparent)}.admin input,.admin textarea,.admin select{background:var(--surface-2);border:1px solid var(--line);color:var(--ink);border-radius:8px;padding:8px 10px;font-size:14px;width:100%;font-family:inherit}.admin input:focus,.admin textarea:focus,.admin select:focus{outline:none;border-color:var(--accent)}.admin input[type=color]{padding:2px;width:40px;height:32px}.admin .btn{height:34px;padding:0 14px;border-radius:8px;border:none;background:var(--accent);color:var(--accent-ink);font-weight:600;font-size:13px;transition:filter var(--t-fast) ease-out}.admin .btn:hover{filter:brightness(1.1)}.admin .btn.ghost{background:var(--surface-2);border:1px solid var(--line);color:var(--ink)}.admin .btn.danger{background:var(--danger)}.admin .btn:disabled{opacity:.5;cursor:default}.admin .row-actions{display:flex;gap:6px;flex-wrap:wrap}.admin .card-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:16px;margin-bottom:16px}.admin .progress{height:6px;background:var(--surface-2);border-radius:3px;overflow:hidden;margin-bottom:4px}.admin .progress>div{height:100%;background:var(--accent);transition:width .4s var(--ease-out)}.admin .grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}.admin .status-badge{padding:3px 9px;border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap}.admin .status-done{background:color-mix(in oklab,var(--ok) 22%,transparent);color:var(--ok)}.admin .status-processing{background:color-mix(in oklab,var(--accent) 24%,transparent);color:#bda7ff;color:oklch(.78 .14 295)}.admin .status-failed{background:color-mix(in oklab,var(--danger) 22%,transparent);color:#ff847d;color:oklch(.75 .16 25)}.admin .status-uploaded{background:var(--surface-2);color:var(--muted)}.admin a.back{color:var(--accent);text-decoration:none;font-weight:600;font-size:13px}.admin .muted{color:var(--muted);font-size:13px}@media (max-width: 700px){.admin .grid2{grid-template-columns:1fr}.admin{padding:16px 12px 60px}}.profile{max-width:640px;margin:0 auto;padding:max(16px,env(safe-area-inset-top)) 16px calc(40px + env(safe-area-inset-bottom))}.profile .back{color:var(--accent);text-decoration:none;font-weight:600;font-size:14px;display:inline-block;margin-bottom:16px}.profile .sec-title{font-size:15px;font-weight:700;letter-spacing:-.01em;margin:28px 2px 12px}.level-card{display:flex;gap:16px;align-items:center;background:linear-gradient(150deg,color-mix(in oklab,var(--accent) 22%,var(--surface)),var(--surface));border:1px solid var(--line);border-radius:var(--r-card);padding:20px}.level-icon{font-size:46px;width:72px;height:72px;flex:0 0 auto;display:grid;place-items:center;border-radius:50%;background:#ffffff14}.level-body{flex:1;min-width:0}.level-name{font-size:22px;font-weight:800;letter-spacing:-.02em}.level-xp{color:var(--accent);font-weight:700;font-size:14px;margin-bottom:8px}.xp-bar{height:10px;border-radius:5px;background:#ffffff1a;overflow:hidden}.xp-bar>div{height:100%;background:linear-gradient(90deg,var(--accent),oklch(.72 .19 320));border-radius:5px;transition:width .6s var(--ease-out)}.level-next{margin-top:6px;font-size:12.5px}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}.stat-box{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px 8px;text-align:center}.stat-num{font-size:20px;font-weight:800;letter-spacing:-.02em}.stat-lbl{font-size:11.5px;color:var(--muted);margin-top:2px}.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.ach{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:14px;opacity:.55}.ach.on{opacity:1;border-color:color-mix(in oklab,var(--accent) 50%,var(--line));background:linear-gradient(160deg,color-mix(in oklab,var(--accent) 12%,var(--surface)),var(--surface))}.ach-icon{font-size:28px}.ach-label{font-weight:700;font-size:14px;margin-top:4px}.ach-desc{font-size:12px;margin-top:2px;line-height:1.35}.ach-bar{height:5px;border-radius:3px;background:#ffffff1a;overflow:hidden;margin-top:8px}.ach-bar>div{height:100%;background:var(--accent);border-radius:3px}.heatmap{display:flex;flex-direction:column;gap:10px}.heat-row{display:grid;grid-template-columns:130px 1fr 48px;align-items:center;gap:10px}.heat-cat{font-size:13px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.heat-bar{height:12px;border-radius:6px;overflow:hidden}.heat-bar>div{height:100%;border-radius:6px;transition:width .6s var(--ease-out);min-width:2px}.heat-num{font-size:12px;text-align:right;font-variant-numeric:tabular-nums}@media (max-width: 480px){.stat-grid{grid-template-columns:repeat(2,1fr)}.heat-row{grid-template-columns:104px 1fr 44px}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:1ms!important;animation-iteration-count:1!important;transition-duration:1ms!important}.feed{scroll-behavior:auto}}