:root{--bg:#f4f6fb;--bg-soft:#eceffa;--surface-2:#f8f9fd;--border:#e3e7f2;--text:#171a2b;--text-2:#4a5170;--text-3:#7a8199;--primary:#5456e8;--primary-2:#7b5cf0;--primary-soft:#eceaff;--primary-ink:#fff;--accent:#0fb59f;--accent-soft:#d9f6f0;--good:#14a05a;--good-soft:#dcf6e8;--bad:#e5484d;--bad-soft:#fde5e6;--warn:#f08a17;--warn-soft:#fff0d9;--shadow-sm:0 1px 2px rgba(23,26,43,.06),0 1px 1px rgba(23,26,43,.04);--shadow:0 6px 24px rgba(40,48,110,.08),0 1px 3px rgba(23,26,43,.06);--shadow-lg:0 18px 50px rgba(40,48,110,.16);--radius:16px;--radius-sm:11px;--font:"Inter","Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;--mono:ui-monospace,"SF Mono","Cascadia Mono",Menlo,Consolas,monospace;color-scheme:light}:root[data-theme=dark]{--bg:#0d101c;--bg-soft:#151a2c;--surface:#161b2e;--surface-2:#1b2137;--border:#272e48;--text:#eef0fa;--text-2:#b4bad4;--text-3:#858cab;--primary:#8b8dff;--primary-2:#a78bff;--primary-soft:#25285a;--primary-ink:#0d101c;--accent:#35d3bd;--accent-soft:#11332f;--good:#3dd68c;--good-soft:#123325;--bad:#ff7a80;--bad-soft:#3a1b20;--warn:#ffb04d;--warn-soft:#3a2a12;--shadow-sm:0 1px 2px rgba(0,0,0,.4);--shadow:0 6px 24px rgba(0,0,0,.35);--shadow-lg:0 18px 50px rgba(0,0,0,.55);color-scheme:dark}*,:after,:before{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.6;margin:0;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{letter-spacing:-.01em;line-height:1.25;margin:0}p{margin:0}a{color:var(--primary);text-decoration:none}button,input,select,textarea{color:inherit;font:inherit}button{cursor:pointer}:focus-visible{border-radius:8px;outline:3px solid color-mix(in srgb,var(--primary) 55%,transparent);outline-offset:2px}[hidden]{display:none!important}.sr-only{height:1px;overflow:hidden;position:absolute;width:1px;clip:rect(0 0 0 0);white-space:nowrap}.muted{color:var(--text-3)}.small{font-size:.875rem}.xs{font-size:.78rem}.bold{font-weight:700}.center{text-align:center}.row{align-items:center;display:flex;gap:10px}.row.wrap{flex-wrap:wrap}.row.between{justify-content:space-between}.stack{display:flex;flex-direction:column;gap:14px}.grow{flex:1;min-width:0}.mt{margin-top:18px}.mt-lg{margin-top:28px}.container{width:min(1120px,100% - 32px)}.page{padding:26px 0 110px}.page-head{margin-bottom:22px}.page-head h1{font-size:clamp(1.55rem,3.4vw,2.1rem);font-weight:800}.page-head p{color:var(--text-2);margin-top:6px;max-width:62ch}.eyebrow{color:var(--primary);font-size:.74rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}.section-title{font-size:1.15rem;font-weight:800;margin-bottom:12px}.card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:20px}.card.pad-lg{padding:26px}.card.flat{box-shadow:none}.card.soft{background:var(--surface-2)}.card-link{color:inherit;display:block;transition:transform .15s,box-shadow .15s,border-color .15s}.card-link:hover{border-color:color-mix(in srgb,var(--primary) 35%,var(--border));box-shadow:var(--shadow);transform:translateY(-2px)}.grid{display:grid;gap:16px}.grid.c2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.c3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.c4{grid-template-columns:repeat(4,minmax(0,1fr))}.grid.auto{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.split{align-items:start;display:grid;gap:20px;grid-template-columns:minmax(0,1fr) 340px}@media(max-width:900px){.grid.c3,.grid.c4{grid-template-columns:repeat(2,minmax(0,1fr))}.split{grid-template-columns:1fr}}@media(max-width:560px){.grid.c2,.grid.c3{grid-template-columns:1fr}.card{padding:16px}}.btn{align-items:center;background:var(--surface);border:1px solid var(--border);border-radius:12px;color:var(--text);display:inline-flex;font-size:.95rem;font-weight:650;gap:8px;justify-content:center;line-height:1.2;min-height:44px;padding:10px 18px;text-decoration:none;transition:transform .12s,box-shadow .12s,background .12s,border-color .12s}.btn:hover{border-color:color-mix(in srgb,var(--primary) 40%,var(--border));box-shadow:var(--shadow-sm)}.btn:active{transform:translateY(1px)}.btn:disabled,.btn[aria-disabled=true]{box-shadow:none;cursor:not-allowed;opacity:.5;transform:none}.btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));border-color:transparent;box-shadow:0 6px 18px color-mix(in srgb,var(--primary) 38%,transparent);color:#fff}:root[data-theme=dark] .btn.primary{color:#0d101c}.btn.primary:hover{filter:brightness(1.06)}.btn.soft{background:var(--primary-soft);color:var(--primary)}.btn.ghost,.btn.soft{border-color:transparent}.btn.ghost{background:transparent;color:var(--text-2)}.btn.ghost:hover{box-shadow:none}.btn.danger{background:var(--bad-soft);color:var(--bad)}.btn.danger,.btn.good{border-color:transparent}.btn.good{background:var(--good);color:#fff}:root[data-theme=dark] .btn.good{color:#0d101c}.btn.lg{border-radius:14px;font-size:1.05rem;padding:14px 26px}.btn.sm{border-radius:10px;font-size:.85rem;min-height:34px;padding:6px 12px}.btn.block{width:100%}.icon-btn{background:transparent;border:1px solid transparent;border-radius:12px;color:var(--text-2);display:inline-grid;height:40px;padding:0;place-items:center;position:relative;width:40px}.icon-btn:hover{background:var(--bg-soft);color:var(--text)}.icon-btn.on{color:var(--warn)}.chip{align-items:center;background:var(--bg-soft);display:inline-flex;font-size:.78rem;font-weight:650;gap:6px;padding:3px 11px;white-space:nowrap}.chip.primary{background:var(--primary-soft);color:var(--primary)}.bar{height:9px;overflow:hidden}.bar,.bar>i{border-radius:999px}.bar>i{background:linear-gradient(90deg,var(--primary),var(--primary-2));display:block;height:100%;transition:width .4s ease}.bar.good>i{background:linear-gradient(90deg,var(--good),var(--accent))}.bar.bad>i{background:var(--bad)}.bar.warn>i{background:var(--warn)}.kbd{background:var(--surface-2);border:solid var(--border);border-radius:6px;border-width:1px 1px 2px;color:var(--text-2);font-size:.72rem;padding:1px 6px}.field{display:flex;flex-direction:column;gap:6px}.field>label,.label{color:var(--text-2);font-size:.82rem;font-weight:700}.input,.select,.textarea{background:var(--surface);border:1.5px solid var(--border);border-radius:12px;min-height:44px;padding:10px 14px;transition:border-color .12s;width:100%}.input:focus,.select:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 18%,transparent);outline:none}.textarea{line-height:1.5;min-height:96px;resize:vertical}.switch{align-items:center;cursor:pointer;display:inline-flex;gap:12px;-webkit-user-select:none;-moz-user-select:none;user-select:none}.switch input{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--border);border-radius:999px;cursor:pointer;flex:none;height:26px;position:relative;transition:background .15s;width:46px}.switch input:after{background:#fff;border-radius:50%;box-shadow:var(--shadow-sm);content:"";height:20px;left:3px;position:absolute;top:3px;transition:transform .15s;width:20px}.switch input:checked{background:var(--primary)}.switch input:checked:after{transform:translate(20px)}.segmented{border-radius:14px;display:inline-flex;flex-wrap:wrap;gap:2px;padding:4px}.segmented button{background:transparent;border:0;border-radius:10px;color:var(--text-2);font-size:.88rem;font-weight:650;padding:7px 14px}.segmented button.on{box-shadow:var(--shadow-sm);color:var(--primary)}.topbar{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:color-mix(in srgb,var(--bg) 82%,transparent);position:sticky;top:0;z-index:40}.topbar .container{gap:18px;height:64px}.brand,.topbar .container{align-items:center;display:flex}.brand{color:var(--text);font-size:1.1rem;font-weight:800;gap:10px;letter-spacing:-.02em}.brand-mark{background:linear-gradient(135deg,var(--primary),var(--accent));border-radius:11px;box-shadow:0 6px 16px color-mix(in srgb,var(--primary) 35%,transparent);color:#fff;display:grid;height:36px;place-items:center;width:36px}.nav{display:flex;gap:2px;margin-left:10px}.nav a{border-radius:10px;color:var(--text-2);font-size:.93rem;font-weight:650;padding:8px 14px}.nav a:hover{background:var(--bg-soft);color:var(--text)}.nav a.on{background:var(--primary-soft);color:var(--primary)}.top-actions{display:flex;margin-left:auto}.streak,.top-actions{align-items:center;gap:6px}.streak{background:var(--warn-soft);border-radius:999px;color:var(--warn);display:inline-flex;font-size:.9rem;font-weight:800;padding:6px 12px}.tabbar{display:none}@media(max-width:860px){.nav{display:none}.tabbar{-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:color-mix(in srgb,var(--surface) 94%,transparent);border-top:1px solid var(--border);bottom:0;display:grid;grid-template-columns:repeat(5,1fr);left:0;padding:6px 6px calc(6px + env(safe-area-inset-bottom));position:fixed;right:0;z-index:45}.tabbar a{align-items:center;border-radius:12px;color:var(--text-3);display:flex;flex-direction:column;font-size:.7rem;font-weight:700;gap:2px;padding:6px 2px}.tabbar a.on{background:var(--primary-soft);color:var(--primary)}}.footer{border-top:1px solid var(--border);color:var(--text-3);font-size:.85rem;padding:22px 0 90px}.hero{background:radial-gradient(1200px 400px at 90% -20%,hsla(0,0%,100%,.22),transparent 60%),linear-gradient(135deg,#4a4de0,#7b5cf0 55%,#0fb59f 130%);border-radius:24px;box-shadow:var(--shadow-lg);color:#fff;padding:30px}.hero h1{font-size:clamp(1.5rem,3.6vw,2.2rem);font-weight:800}.hero p{margin-top:8px;max-width:54ch;opacity:.92}.hero .btn{border-color:transparent}.hero .btn.white{background:#fff;box-shadow:0 8px 22px #0000002e;color:#3b3dc9}.hero .btn.glass{background:#ffffff29;border:1px solid hsla(0,0%,100%,.3);color:#fff}.hero .btn.glass:hover{background:#ffffff42}.stat{display:flex;flex-direction:column;gap:2px}.stat .num{font-size:1.9rem;font-weight:800;letter-spacing:-.03em;line-height:1.15}.stat .lbl{color:var(--text-3);font-size:.82rem;font-weight:650}.ring{display:inline-grid;place-items:center;position:relative}.ring svg{transform:rotate(-90deg)}.ring .ring-label{line-height:1.1;position:absolute;text-align:center}.ring .ring-label b{display:block;font-size:1.35rem;font-weight:800}.ring .ring-label span{color:var(--text-3);font-size:.7rem;font-weight:650}.mode{align-items:flex-start;background:var(--surface);border:1px solid var(--border);display:flex;gap:14px;padding:18px;text-align:left;transition:transform .15s,box-shadow .15s,border-color .15s;width:100%}.mode:hover:not(:disabled){border-color:color-mix(in srgb,var(--primary) 40%,var(--border));box-shadow:var(--shadow);transform:translateY(-2px)}.mode:disabled{cursor:not-allowed;opacity:.55}.mode .ico{background:var(--primary-soft);border-radius:14px;color:var(--primary);display:grid;flex:none;height:46px;place-items:center;width:46px}.mode .ico.accent{background:var(--accent-soft);color:var(--accent)}.mode .ico.warn{background:var(--warn-soft);color:var(--warn)}.mode .ico.bad{background:var(--bad-soft);color:var(--bad)}.mode .ico.good{background:var(--good-soft);color:var(--good)}.mode h3{font-size:1.02rem;font-weight:800}.mode p{color:var(--text-2);font-size:.88rem;margin-top:3px}.qcard{padding:24px}.q-meta{align-items:center;display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.q-text{font-size:1.14rem;font-weight:650;line-height:1.55;margin-bottom:18px;white-space:pre-line}.opts{flex-direction:column;gap:10px}.opt,.opts{display:flex}.opt{align-items:flex-start;background:var(--surface);border:1.5px solid var(--border);border-radius:14px;gap:14px;padding:14px 16px;text-align:left;transition:border-color .12s,background .12s,transform .1s;width:100%}.opt:hover:not(:disabled):not(.locked){background:var(--primary-soft);border-color:var(--primary)}.opt:active:not(.locked){transform:scale(.995)}.opt .letter{background:var(--bg-soft);border-radius:10px;color:var(--text-2);display:grid;flex:none;font-size:.9rem;font-weight:800;height:32px;place-items:center;width:32px}.opt .txt{flex:1;padding-top:3px}.opt .tail{align-self:center;flex:none}.opt.picked{background:var(--primary-soft);border-color:var(--primary)}.opt.picked .letter{background:var(--primary);color:#fff}.opt.locked{cursor:default}.opt.right{background:var(--good-soft);border-color:var(--good)}.opt.wrong{background:var(--bad-soft);border-color:var(--bad)}.opt .why{color:var(--text-2);display:block;font-size:.86rem;font-weight:500;margin-top:6px}.opt.dim{opacity:.78}.explain{background:var(--surface-2);border:1px solid var(--border);border-radius:16px;margin-top:18px;overflow:hidden}.explain .banner{align-items:center;display:flex;font-weight:800;gap:10px;padding:12px 16px}.explain .banner.ok{background:var(--good-soft);color:var(--good)}.explain .banner.no{background:var(--bad-soft);color:var(--bad)}.explain .banner.skip{background:var(--warn-soft);color:var(--warn)}.explain .body{display:flex;flex-direction:column;gap:14px;padding:16px}.explain h4{color:var(--text-3);font-size:.78rem;letter-spacing:.08em;margin-bottom:4px;text-transform:uppercase}.explain .prose{color:var(--text);white-space:pre-line}.tip-box{align-items:flex-start;background:var(--accent-soft);border-radius:12px;color:var(--text);display:flex;gap:10px;padding:12px 14px}.tip-box .ti{color:var(--accent);flex:none;margin-top:2px}.caution-box{align-items:flex-start;background:var(--warn-soft);border-radius:12px;display:flex;gap:10px;padding:12px 14px}.caution-box .ti{color:var(--warn);flex:none;margin-top:2px}.why-list{display:flex;flex-direction:column;gap:8px}.why-item{display:flex;font-size:.93rem;gap:10px}.why-item .letter{background:var(--bad-soft);border-radius:8px;color:var(--bad);display:grid;flex:none;font-size:.8rem;font-weight:800;height:24px;place-items:center;width:24px}.ai-box{background:var(--primary-soft)}.ai-box,.note-box{border-radius:12px;font-size:.93rem;padding:12px 14px;white-space:pre-wrap}.note-box{background:var(--warn-soft)}.palette{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(40px,1fr))}.pal{background:var(--surface);border:1.5px solid var(--border);border-radius:11px;font-size:.88rem;font-weight:750;height:40px;position:relative}.pal.done{background:var(--primary-soft);border-color:transparent;color:var(--primary)}.pal.cur{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--primary) 25%,transparent)}.pal.flag:after{background:var(--warn);border-radius:50%;content:"";height:8px;position:absolute;right:3px;top:3px;width:8px}.pal.right{background:var(--good-soft);color:var(--good)}.pal.right,.pal.skip{border-color:transparent}.pal.skip{background:var(--warn-soft);color:var(--warn)}.pal.wrong{background:var(--bad-soft);border-color:transparent;color:var(--bad)}.sticky{position:sticky;top:80px}.list-item{align-items:center;border-bottom:1px solid var(--border);display:flex;gap:12px;padding:12px 4px}.list-item:last-child{border-bottom:0}.empty{color:var(--text-2);padding:44px 20px;text-align:center}.empty .ei{background:var(--primary-soft);border-radius:20px;color:var(--primary);display:grid;height:64px;margin:0 auto 12px;place-items:center;width:64px}.empty h3{color:var(--text);font-size:1.1rem;margin-bottom:4px}.flip{perspective:1400px}.flip-inner{min-height:340px;position:relative;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.8,.2,1)}.flip.flipped .flip-inner{transform:rotateY(180deg)}.face{backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:24px;display:flex;flex-direction:column;inset:0;justify-content:center;overflow:auto;padding:28px;position:absolute}.face.front{background:var(--surface);border:1px solid var(--border)}.face.back,.face.front{box-shadow:var(--shadow)}.face.back{background:linear-gradient(160deg,var(--primary-soft),var(--surface));border:1px solid color-mix(in srgb,var(--primary) 30%,var(--border));transform:rotateY(180deg)}.fc-q{font-size:1.25rem;font-weight:700;text-align:center}@media(max-width:560px){.flip-inner{min-height:420px}.face{padding:20px}}.heat{display:grid;gap:6px;grid-template-columns:repeat(14,1fr)}.heat div{aspect-ratio:1;background:var(--bg-soft);border-radius:7px}.heat div.l1{background:color-mix(in srgb,var(--primary) 25%,var(--bg-soft))}.heat div.l2{background:color-mix(in srgb,var(--primary) 50%,var(--bg-soft))}.heat div.l3{background:color-mix(in srgb,var(--primary) 75%,var(--bg-soft))}.heat div.l4{background:var(--primary)}.stack-bar{background:var(--bg-soft);border-radius:999px;display:flex;height:16px;overflow:hidden}.stack-bar i{display:block;height:100%}.legend{color:var(--text-2);display:flex;flex-wrap:wrap;font-size:.82rem;gap:14px}.legend span:before{background:var(--c,var(--primary));border-radius:3px;content:"";display:inline-block;height:10px;margin-right:6px;width:10px}.modal-back{animation:fade .15s;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);background:#0a0c1c8c;display:grid;inset:0;padding:16px;place-items:center;position:fixed;z-index:80}.modal{animation:pop .18s;background:var(--surface);border-radius:22px;box-shadow:var(--shadow-lg);max-height:88vh;overflow:auto;padding:24px;width:min(520px,100%)}.modal h3{font-size:1.2rem;font-weight:800;margin-bottom:8px}.modal .actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end;margin-top:20px}.toasts{align-items:center;bottom:90px;display:flex;flex-direction:column;gap:8px;left:50%;pointer-events:none;position:fixed;transform:translate(-50%);z-index:90}.toast{animation:pop .18s;background:var(--text);border-radius:14px;box-shadow:var(--shadow-lg);color:var(--bg);font-weight:650;max-width:min(92vw,460px);padding:11px 18px;pointer-events:auto}.toast.ok{background:var(--good);color:#fff}.toast.error{background:var(--bad);color:#fff}@keyframes fade{0%{opacity:0}}@keyframes pop{0%{opacity:0;transform:translateY(8px) scale(.98)}}@keyframes shake{20%,60%{transform:translate(-5px)}40%,80%{transform:translate(5px)}}.shake{animation:shake .35s}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}.run-top{align-items:center;display:flex;gap:14px;margin-bottom:18px}.run-top .bar{flex:1}.timer{background:var(--bg-soft);border-radius:12px;font-weight:800;padding:6px 12px}.timer.low{background:var(--bad-soft);color:var(--bad)}.sticky-actions{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:color-mix(in srgb,var(--surface) 92%,transparent);border:1px solid var(--border);border-radius:18px;bottom:76px;box-shadow:var(--shadow);display:flex;gap:10px;justify-content:space-between;margin-top:18px;padding:10px;position:sticky;z-index:20}@media(min-width:861px){.sticky-actions{bottom:16px}}.score-big{font-size:3.4rem;font-weight:900;letter-spacing:-.04em;line-height:1}:root{--bg:#fff;--bg-soft:#f4f4f5;--surface:#fff;--surface-2:#fafafa;--border:#e4e4e7;--text:#09090b;--text-2:#52525b;--text-3:#71717a;--primary:#09090b;--primary-2:#09090b;--primary-soft:#f4f4f5;--accent:#0d9488;--accent-soft:#e6f6f4;--good:#16a34a;--good-soft:#e8f7ee;--bad:#dc2626;--bad-soft:#fdecec;--warn:#d97706;--warn-soft:#fdf3e1;--shadow-sm:none;--shadow:0 1px 2px rgba(0,0,0,.04);--shadow-lg:0 16px 40px rgba(0,0,0,.12);--radius:12px;--radius-sm:8px;--font:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI","Helvetica Neue",Arial,sans-serif;--mono:"Geist Mono",ui-monospace,"SF Mono","Cascadia Mono",Menlo,Consolas,monospace;--stripe:repeating-linear-gradient(315deg,var(--border) 0 1px,transparent 1px 6px)}:root[data-theme=dark]{--bg:#09090b;--bg-soft:#18181b;--surface:#09090b;--surface-2:#111113;--border:#27272a;--text:#fafafa;--text-2:#a1a1aa;--text-3:#71717a;--primary:#fafafa;--primary-2:#fafafa;--primary-soft:#18181b;--accent:#2dd4bf;--accent-soft:#0f2a27;--good:#4ade80;--good-soft:#0f2a1a;--bad:#f87171;--bad-soft:#321517;--warn:#fbbf24;--warn-soft:#30230c;--shadow:none;--shadow-lg:0 16px 40px rgba(0,0,0,.6)}body{font-size:15px;letter-spacing:-.005em}h1,h2,h3,h4{letter-spacing:-.025em}::-moz-selection{background:var(--text);color:var(--bg)}::selection{background:var(--text);color:var(--bg)}.container{background:var(--bg);padding-inline:20px;width:min(960px,100%)}@media(max-width:560px){.container{padding-inline:14px}}.page{min-height:70vh;padding-top:28px}.sep{background:var(--stripe);border-block:1px solid var(--border);border-inline:1px solid var(--border);height:28px;width:min(960px,100%)}.topbar{background:color-mix(in srgb,var(--bg) 80%,transparent)}.topbar .container{border-inline:1px solid var(--border)}.footer{border-top:0;padding:0 0 90px}.footer .container{font-family:var(--mono);font-size:.75rem;padding-block:18px}.brand{font-weight:650;letter-spacing:-.03em}.brand-mark{background:var(--text);border-radius:8px;box-shadow:none;color:var(--bg);height:28px;width:28px}.nav a{border-radius:8px;font-size:.88rem;font-weight:500;padding:6px 12px}.nav a.on,.tabbar a.on{background:var(--bg-soft);color:var(--text)}.streak{background:transparent;border:1px solid var(--border);color:var(--text);font-family:var(--mono);font-size:.78rem;font-weight:600;padding:3px 10px}.streak .icon{color:var(--warn)}.card{border-radius:var(--radius);box-shadow:none;padding:18px}.card.pad-lg{padding:24px}.card-link:hover,.mode:hover:not(:disabled){background:var(--surface-2);border-color:var(--text-3);box-shadow:none;transform:none}.btn{border-radius:10px;box-shadow:none;font-size:.9rem;font-weight:550;min-height:38px;padding:8px 14px}.btn:hover{background:var(--bg-soft);border-color:var(--text-3);box-shadow:none}.btn.primary{background:var(--text);border-color:var(--text);box-shadow:none;color:var(--bg)}:root[data-theme=dark] .btn.primary{color:#09090b}.btn.primary:hover{background:var(--text);filter:none;opacity:.88}.btn.soft{border-color:var(--border);color:var(--text)}.btn.ghost:hover,.btn.soft{background:var(--bg-soft)}.btn.lg{border-radius:12px;font-size:.95rem;min-height:44px;padding:11px 20px}.btn.sm{border-radius:8px;font-size:.8rem;min-height:30px;padding:4px 10px}.icon-btn{border-radius:10px;height:36px;width:36px}.chip{background:transparent;border:1px solid var(--border);border-radius:999px;color:var(--text-2);font-family:var(--mono);font-size:.72rem;font-weight:500;padding:1px 9px}.chip.primary{background:var(--text);border-color:var(--text);color:var(--bg)}.chip.good{background:var(--good-soft);color:var(--good)}.chip.bad,.chip.good{border-color:transparent}.chip.bad{background:var(--bad-soft);color:var(--bad)}.chip.warn{background:var(--warn-soft);color:var(--warn)}.chip.accent,.chip.warn{border-color:transparent}.chip.accent{background:var(--accent-soft);color:var(--accent)}.eyebrow{color:var(--text-3);font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.08em}.page-head h1{font-size:clamp(1.6rem,3.6vw,2.1rem);font-weight:650}.section-title{font-size:1rem;font-weight:600;letter-spacing:-.02em}.bar{background:var(--bg-soft);height:6px}.bar>i{background:var(--text)}.bar.good>i{background:var(--good)}.kbd{font-family:var(--mono)}.input,.select,.textarea{border-radius:10px;border-width:1px;min-height:40px}.input:focus,.select:focus,.textarea:focus{border-color:var(--text);box-shadow:0 0 0 3px color-mix(in srgb,var(--text) 10%,transparent)}.switch input:checked{background:var(--text)}.segmented{background:var(--bg-soft);border:1px solid var(--border);border-radius:10px}.segmented button{border-radius:7px;font-size:.84rem;font-weight:500}.segmented button.on{background:var(--surface);box-shadow:0 0 0 1px var(--border);color:var(--text)}.modal,.toast{border-radius:14px}.hero,.modal{border:1px solid var(--border)}.hero{background:var(--surface);border-radius:var(--radius);box-shadow:none;color:var(--text);overflow:hidden;padding:28px;position:relative}.hero:after{background:var(--stripe);content:"";height:100%;inset:0 0 auto auto;mask-image:linear-gradient(90deg,transparent,#000);-webkit-mask-image:linear-gradient(90deg,transparent,#000);pointer-events:none;position:absolute;width:38%}.hero>*{position:relative;z-index:1}.hero .eyebrow{color:var(--text-3)!important}.hero h1{font-size:clamp(1.7rem,4.4vw,2.5rem);font-weight:650;letter-spacing:-.04em}.hero p{color:var(--text-2);opacity:1}.hero .btn.white{background:var(--text);border:1px solid var(--text);box-shadow:none;color:var(--bg)}.hero .btn.glass{background:transparent;border:1px solid var(--border);color:var(--text)}.hero .btn.glass:hover{background:var(--bg-soft)}.mode{border-radius:var(--radius);padding:16px}.mode .ico,.mode .ico.accent,.mode .ico.bad,.mode .ico.good,.mode .ico.warn{background:var(--bg-soft);border:1px solid var(--border);border-radius:10px;color:var(--text);height:40px;width:40px}.mode h3{font-size:.95rem;font-weight:600}.mode p{font-size:.84rem}.stat .num{font-size:1.7rem;font-weight:650;letter-spacing:-.04em}.stat .lbl{font-family:var(--mono);font-size:.72rem;font-weight:500;letter-spacing:.04em;text-transform:uppercase}.ring .ring-label b{font-weight:650}.opt{border-radius:10px;border-width:1px;padding:12px 14px}.opt .letter{background:transparent;border:1px solid var(--border);border-radius:8px;font-family:var(--mono);font-size:.8rem;height:28px;width:28px}.opt:hover:not(:disabled):not(.locked){background:var(--surface-2);border-color:var(--text)}.opt.picked{background:var(--bg-soft);border-color:var(--text)}.opt.picked .letter{background:var(--text);border-color:var(--text);color:var(--bg)}.opt.right .letter{background:var(--good);border-color:var(--good);color:#fff}.opt.wrong .letter{background:var(--bad);border-color:var(--bad);color:#fff}.q-text{font-size:1.08rem;font-weight:600;letter-spacing:-.02em}.explain{background:var(--surface);border-radius:12px}.explain h4{font-weight:500}.explain h4,.pal{font-family:var(--mono)}.pal{border-radius:8px;border-width:1px}.pal.done{background:var(--text);color:var(--bg)}.pal.cur{border-color:var(--text);box-shadow:0 0 0 2px var(--bg),0 0 0 3px var(--text)}.face{border-radius:14px}.face.back,.face.front{box-shadow:none}.face.back{background:var(--surface-2);border-color:var(--text-3)}.timer{background:transparent;border:1px solid var(--border);border-radius:8px;font-family:var(--mono)}.sticky-actions{border-radius:14px;box-shadow:none}.score-big{font-weight:650}.empty .ei{background:var(--bg-soft);border:1px solid var(--border);border-radius:12px;color:var(--text)}.list-item{padding-inline:0}.heat div{border-radius:4px}.count{color:var(--text-3);font-family:var(--mono);font-size:.75rem;margin-left:6px}:root{--pad:24px;--frame:960px;--u:8px}@media(max-width:560px){:root{--pad:16px}}html{scrollbar-gutter:stable}body{line-height:24px;overflow-x:clip}.container{border-inline:1px solid var(--border);margin-inline:auto;padding-inline:var(--pad);width:min(var(--frame),100%)}.topbar{border-bottom:1px solid var(--border)}.topbar .container{gap:16px;height:56px}.page{min-height:0;padding:0 var(--pad) 64px}.brand-mark,.icon-btn{height:32px;width:32px}.nav a{align-items:center;display:inline-flex;height:32px;padding:0 12px}.band,.sep{background:var(--stripe);border:0;border-inline:1px solid var(--border);height:32px;position:relative}.sep{margin-inline:auto;width:min(var(--frame),100%)}.band{margin-inline:calc(var(--pad)*-1)}.band:after,.band:before,.page-head:after,.panel:after,.panel:before,.sep:after,.sep:before{background:var(--border);content:"";height:1px;left:calc(50% - 50vw);pointer-events:none;position:absolute;width:100vw}.band:before,.panel:before,.sep:before{top:0}.band:after,.panel:after,.sep:after{bottom:0}.band{border-inline:0}.panel{margin-inline:calc(var(--pad)*-1);position:relative}.panel-head{align-items:center;border-bottom:1px solid var(--border);color:var(--text-3);display:flex;font-family:var(--mono);font-size:12px;gap:16px;height:40px;justify-content:space-between;letter-spacing:.06em;line-height:16px;padding-inline:var(--pad);position:relative;text-transform:uppercase}.panel-head b{color:var(--text);font-weight:500}.panel-head a{color:var(--text-2);font-size:12px;font-weight:500;letter-spacing:0;text-transform:none}.panel-head a:hover{color:var(--text)}.panel-head:after,.panel-head:before{background:linear-gradient(var(--text-3),var(--text-3)) 50% /1px 11px no-repeat,linear-gradient(var(--text-3),var(--text-3)) 50% /11px 1px no-repeat;content:"";height:11px;pointer-events:none;position:absolute;top:-6px;width:11px;z-index:2}.panel-head:before{left:-6px}.panel-head:after{right:-6px}.panel-body{padding:24px var(--pad)}.cells{background:var(--border);display:grid;gap:1px}.cells.c2{grid-template-columns:repeat(2,minmax(0,1fr))}.cells.c3{grid-template-columns:repeat(3,minmax(0,1fr))}.cells.c4{grid-template-columns:repeat(4,minmax(0,1fr))}.cells>*{background:var(--bg);border:0;border-radius:0;box-shadow:none;min-width:0;padding:24px var(--pad)}.cells>.card,.cells>.mode{margin:0}.cells>.mode{height:100%;width:100%}.cells>.card-link:hover,.cells>.mode:hover:not(:disabled){background:var(--surface-2)}.cells .ring{flex:none}.cells .bar{height:8px}.cells .bar,.cells .bar>i{border-radius:0}.sub{border-top:1px solid var(--border);margin:24px calc(var(--pad)*-1) 0;padding:24px var(--pad) 0}@media(max-width:900px){.cells.c4{grid-template-columns:repeat(2,minmax(0,1fr))}.cells.c2,.cells.c3{grid-template-columns:1fr}}@media(max-width:480px){.cells.c4{grid-template-columns:1fr}}.hero.panel{background:linear-gradient(90deg,var(--bg) 52%,transparent 100%),var(--stripe);border:0;border-radius:0;overflow:visible;padding:48px var(--pad) 40px}.hero.panel:after{background:var(--border);bottom:0;content:"";height:1px;left:calc(50% - 50vw);mask:none;-webkit-mask:none;position:absolute;right:auto;top:auto;width:100vw}.hero.panel:before{top:0}.page-head{margin:0 calc(var(--pad)*-1) 32px;padding:40px var(--pad) 32px;position:relative}.page-head p{margin-top:8px}