:root{--red: #d7263d;--red-d: #a8172b;--green: #46b62f;--green-d: #2f8a1d;--green-bg: #e8f8e2;--wrong: #e5484d;--wrong-d: #b4252a;--wrong-bg: #fdecec;--blue: #1c8fe0;--blue-d: #136aa8;--orange: #ff9600;--orange-d: #cc7400;--gold: #ffc800;--gold-d: #d9a400;--ink: #1f2933;--muted: #5b6875;--line: #e3e7eb;--bg: #ffffff;--soft: #f5f7f9;--radius: 18px;--nav-h: 68px;--safe-b: env(safe-area-inset-bottom, 0px);--safe-t: env(safe-area-inset-top, 0px);color-scheme:light;font-family:ui-rounded,SF Pro Rounded,Nunito,Segoe UI,system-ui,-apple-system,Roboto,sans-serif;color:var(--ink);background:var(--bg);-webkit-text-size-adjust:100%}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{background:var(--bg);overscroll-behavior-y:none;-webkit-tap-highlight-color:transparent}a{color:inherit}h1,h2,h3{line-height:1.2;margin:0 0 .5rem}p{line-height:1.5}button{font:inherit}:focus-visible{outline:3px solid var(--blue);outline-offset:2px}.app{max-width:560px;margin:0 auto;min-height:100dvh;padding-top:var(--safe-t)}main{padding:16px 16px calc(var(--nav-h) + var(--safe-b) + 24px)}.app.no-nav main{padding-bottom:calc(var(--safe-b) + 24px)}.screen>h1{font-size:1.6rem;margin:8px 0 16px}.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:54px;padding:12px 18px;border:0;border-radius:16px;font-weight:800;font-size:1.05rem;letter-spacing:.02em;text-decoration:none;cursor:pointer;color:#fff;background:var(--c, var(--green));box-shadow:0 5px 0 var(--cd, var(--green-d));margin:6px 0 14px;transition:transform .08s,box-shadow .08s}.btn:active:not(:disabled){transform:translateY(4px);box-shadow:0 1px 0 var(--cd, var(--green-d))}.btn:disabled{--c: #c9d1d8;--cd: #aab4bd;cursor:not-allowed}.btn-green{--c: var(--green);--cd: var(--green-d)}.btn-blue{--c: var(--blue);--cd: var(--blue-d)}.btn-red{--c: var(--wrong);--cd: var(--wrong-d)}.btn-orange{--c: var(--orange);--cd: var(--orange-d)}.btn-ghost{--c: #fff;--cd: var(--line);color:var(--blue-d);border:2px solid var(--line)}.card{display:block;background:#fff;border:2px solid var(--line);border-radius:var(--radius);padding:16px;margin:12px 0;text-decoration:none;box-shadow:0 3px 0 var(--line)}.card h2{font-size:1.2rem}.card.big p{color:var(--muted)}.card.warn{background:#fff7e6;border-color:#ffd591}.hint{color:var(--muted);font-size:.92rem;display:flex;gap:6px;align-items:center;margin:0 0 6px}.kicker{color:var(--muted);font-weight:700;text-transform:uppercase;font-size:.8rem;letter-spacing:.06em;margin:0 0 6px}.footnote{color:var(--muted);font-size:.8rem;text-align:center;margin-top:24px}.row{display:flex;gap:10px}.row .btn{flex:1;font-size:.95rem}.hero{background:linear-gradient(160deg,var(--red),var(--red-d));color:#fff;border-radius:22px;padding:18px;margin-top:4px}.brand{display:flex;gap:12px;align-items:center}.brand img{border-radius:10px;box-shadow:0 0 0 2px #fff9}.brand h1{font-size:1.3rem;margin:0}.brand p{margin:0;opacity:.9}.hero-stats{margin-top:12px;background:#ffffff29;border-radius:12px;padding:8px 12px;font-size:.95rem}.install-banner{display:flex;align-items:center;gap:10px;width:100%;margin-top:12px;padding:14px;border-radius:16px;border:2px dashed var(--blue);background:#eef7fe;color:var(--blue-d);font-weight:800;cursor:pointer;min-height:52px}.resume,.review-shortcut{display:flex;align-items:center;gap:12px}.resume{border-color:var(--green);background:var(--green-bg)}.resume div,.review-shortcut div{display:flex;flex-direction:column;flex:1}.resume span,.review-shortcut span{color:var(--muted);font-size:.92rem}.review-shortcut svg{color:var(--orange);flex:none}.chev{font-size:1.8rem;color:var(--muted)}.trail{list-style:none;padding:8px 0 0;margin:8px 0 0;position:relative;overflow-x:clip}.stop{position:relative;display:flex;flex-direction:column;align-items:center;padding:10px 0 34px;transform:translate(calc(var(--x) * min(34px,6vw)))}.stop:not(:last-child):after{content:"";position:absolute;bottom:4px;left:50%;width:8px;height:24px;margin-left:-4px;border-radius:4px;background:var(--line)}.stop.done:not(:last-child):after{background:var(--gold)}.node{width:76px;height:70px;border-radius:50%;border:0;display:grid;place-items:center;color:#fff;cursor:pointer;background:var(--n, var(--green));box-shadow:0 7px 0 var(--nd, var(--green-d));font-size:1.6rem;font-weight:900;transition:transform .08s,box-shadow .08s}.node:active{transform:translateY(5px);box-shadow:0 2px 0 var(--nd, var(--green-d))}.node svg{width:32px;height:32px}.stop.done .node{--n: var(--gold);--nd: var(--gold-d)}.stop.locked .node{--n: #d6dce1;--nd: #b3bcc4;color:#7b8792}.stop.current .node{animation:pulse 1.6s ease-in-out infinite}@keyframes pulse{0%,to{box-shadow:0 7px 0 var(--green-d),0 0 #46b62f80}50%{box-shadow:0 7px 0 var(--green-d),0 0 0 12px #46b62f00}}.stop-label{text-align:center;margin-top:14px;max-width:min(250px,70%);display:flex;flex-direction:column}.stop-label .t{font-weight:800}.stop-label .m{color:var(--muted);font-size:.85rem}.stop.locked .stop-label .t{color:var(--muted)}.back{display:inline-flex;align-items:center;min-height:44px;text-decoration:none;color:var(--blue-d);font-weight:800}.lesson-head h1{font-size:1.7rem}.pages{color:var(--muted)}.step{display:flex;gap:14px;margin-top:18px}.step-n{flex:none;width:36px;height:36px;border-radius:50%;background:var(--soft);border:2px solid var(--line);display:grid;place-items:center;font-weight:900;color:var(--muted)}.step-body{flex:1}.step-body h2{font-size:1.1rem;margin-top:6px}.stats{display:flex;justify-content:space-around;text-align:center}.stats div{display:flex;flex-direction:column}.stats strong{font-size:1.3rem}.stats span{color:var(--muted);font-size:.85rem}.practice-top{display:flex;align-items:center;gap:12px;margin:4px 0 18px}.close{width:44px;height:44px;display:grid;place-items:center;text-decoration:none;font-size:1.4rem;color:var(--muted);flex:none}.progress{flex:1;height:16px;background:var(--line);border-radius:8px;overflow:hidden}.progress-fill{height:100%;background:var(--green);border-radius:8px;transition:width .3s;box-shadow:inset 0 -4px #00000014}.count{font-weight:800;color:var(--muted);font-variant-numeric:tabular-nums;min-width:3.2em;text-align:right}.question{font-size:1.35rem;margin:6px 0 18px}.options{display:flex;flex-direction:column;gap:12px}.option{display:flex;align-items:center;gap:12px;min-height:64px;width:100%;padding:12px 14px;text-align:left;cursor:pointer;background:#fff;color:var(--ink);border:2px solid var(--line);border-radius:16px;box-shadow:0 4px 0 var(--line);font-size:1.02rem;position:relative}.option:active:not(:disabled){transform:translateY(3px);box-shadow:0 1px 0 var(--line)}.option:disabled{cursor:default}.letter{flex:none;width:32px;height:32px;border-radius:9px;border:2px solid var(--line);display:grid;place-items:center;font-weight:900;color:var(--muted);font-size:.95rem}.otext{flex:1}.option.right{border-color:var(--green);background:var(--green-bg);box-shadow:0 4px 0 var(--green)}.option.right .letter{background:var(--green);border-color:var(--green);color:#fff}.option.wrong{border-color:var(--wrong);background:var(--wrong-bg);box-shadow:0 4px 0 var(--wrong)}.option.wrong .letter{background:var(--wrong);border-color:var(--wrong);color:#fff}.option.dim{opacity:.55}.tag{position:absolute;top:-11px;right:12px;font-size:.72rem;font-weight:900;padding:2px 8px;border-radius:8px;color:#fff;text-transform:uppercase;letter-spacing:.04em}.tag-right{background:var(--green-d)}.tag-wrong{background:var(--wrong-d)}.feedback-zone{min-height:10px}.feedback{margin-top:18px;border-radius:16px;padding:14px 16px}.feedback.ok{position:fixed;left:0;right:0;bottom:0;margin:0;border-radius:22px 22px 0 0;padding:22px 24px calc(22px + var(--safe-b));background:var(--green-bg);color:var(--green-d);display:flex;align-items:center;gap:12px;font-size:1.5rem;border-top:3px solid var(--green);z-index:15}.feedback.ok svg{width:30px;height:30px}.feedback.pop{animation:pop .35s ease-out}@keyframes pop{0%{transform:translateY(100%)}to{transform:none}}.feedback.ko{background:var(--wrong-bg)}.ko-title{color:var(--wrong-d);font-size:1.2rem;margin:0 0 4px}.ref{display:inline-flex;gap:6px;align-items:center;color:var(--blue-d);font-size:.88rem;margin-bottom:8px;min-height:40px}.result{text-align:center;position:relative}.score-ring{width:190px;height:190px;border-radius:50%;margin:18px auto;display:flex;flex-direction:column;justify-content:center;align-items:center;border:12px solid var(--blue)}.score-ring.ok{border-color:var(--green)}.score-ring.ko{border-color:var(--orange)}.score-ring strong{font-size:2.4rem}.score-ring span{color:var(--muted)}.ok-card{border-color:var(--green);background:var(--green-bg);display:flex;flex-direction:column;gap:4px}.ko-card{border-color:#ffd591;background:#fff7e6;display:flex;flex-direction:column;gap:4px}.actions{margin-top:16px}.confetti{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden;z-index:5}.confetti i{position:absolute;top:-20px;width:10px;height:16px;border-radius:3px;animation:fall 1.8s ease-in forwards}@keyframes fall{to{transform:translateY(105vh) rotate(540deg)}}.chips{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:6px}.chips li{background:var(--soft);border-radius:10px;padding:4px 10px;font-size:.85rem}.audio{width:100%;margin:6px 0}.oath-text{margin:16px 0;padding:16px 18px;background:var(--soft);border-left:6px solid var(--red);border-radius:12px;display:flex;flex-direction:column;gap:4px;font-size:1.1rem}.profiles{display:flex;flex-wrap:wrap;gap:8px}.chip-btn{min-height:46px;padding:8px 16px;border-radius:14px;border:2px solid var(--line);background:#fff;font-weight:800;cursor:pointer}.chip-btn.on{border-color:var(--green);background:var(--green-bg);color:var(--green-d)}.chip-btn.add{color:var(--blue-d)}textarea{width:100%;border:2px solid var(--line);border-radius:12px;padding:10px;font:inherit;font-size:.85rem}.paste-label{display:block;margin:8px 0 4px;font-weight:700}.navbar{position:fixed;bottom:0;left:0;right:0;height:calc(var(--nav-h) + var(--safe-b));padding-bottom:var(--safe-b);display:flex;justify-content:center;background:#fff;border-top:2px solid var(--line);z-index:10}.nav-item{flex:1;max-width:140px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;text-decoration:none;color:var(--muted);font-size:.78rem;font-weight:800;position:relative}.nav-item.active{color:var(--green-d)}.nav-item.active svg{background:var(--green-bg);border-radius:10px;padding:2px;width:34px;height:30px}.badge{position:absolute;top:6px;left:55%;background:var(--wrong);color:#fff;border-radius:10px;font-size:.7rem;padding:1px 6px;min-width:20px}.offline-bar{background:#33414e;color:#fff;text-align:center;font-size:.85rem;padding:6px 10px}.toast{position:fixed;left:16px;right:16px;bottom:calc(var(--nav-h) + var(--safe-b) + 14px);max-width:520px;margin:0 auto;background:#263238;color:#fff;padding:14px 16px;border-radius:14px;z-index:20;text-align:center}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:30;display:flex;align-items:flex-end}.sheet{background:#fff;width:100%;max-width:560px;margin:0 auto;border-radius:22px 22px 0 0;padding:20px 18px calc(20px + var(--safe-b));max-height:88dvh;overflow:auto}.sheet h3{margin-top:14px}.sheet ol{padding-left:1.2rem;line-height:1.6}.warn-text{color:var(--wrong-d);font-weight:700}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}.confetti{display:none}}.exam-shortcut{display:flex;align-items:center;gap:12px;border-color:var(--blue);background:#eef7fe}.exam-shortcut div{display:flex;flex-direction:column;flex:1}.exam-shortcut span{color:var(--muted);font-size:.92rem}.exam-shortcut svg{color:var(--blue-d);flex:none}.rules{margin:0;padding-left:1.1rem;line-height:1.6}.history{list-style:none;padding:0;margin:0}.history-row{display:flex;align-items:center;gap:10px;min-height:48px;text-decoration:none;border-top:1px solid var(--line)}.history-row .hint{margin:0 0 0 auto;font-size:.8rem;text-align:right}.pill{font-size:.75rem;font-weight:900;padding:3px 8px;border-radius:8px;color:#fff}.pill.ok{background:var(--green-d)}.pill.ko{background:var(--orange-d)}.timer{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;font-weight:900;font-size:1.2rem;font-variant-numeric:tabular-nums;background:var(--soft);border:2px solid var(--line);border-radius:12px;min-height:44px}.timer.low{color:var(--wrong-d);border-color:var(--wrong);background:var(--wrong-bg)}.exam-run .count{min-width:auto;font-size:.85rem}.dots{display:grid;grid-template-columns:repeat(auto-fill,minmax(44px,1fr));gap:6px;margin:0 0 14px}.dot{min-height:44px;border-radius:10px;border:2px solid var(--line);background:#fff;font-weight:800;color:var(--muted);font-size:.85rem;padding:0;cursor:pointer}.dot.done{background:#e4f1fc;border-color:#9ccbf0;color:var(--blue-d)}.dot.cur{border-color:var(--blue);box-shadow:0 0 0 2px var(--blue) inset;color:var(--ink)}.option.selected{border-color:var(--blue);background:#eef7fe;box-shadow:0 4px 0 var(--blue)}.option.selected .letter{background:var(--blue);border-color:var(--blue);color:#fff}.exam-nav{margin-top:18px}.exam-report{text-align:left}.exam-report .score-ring{text-align:center}.correction{list-style:none;padding:0}.corr{border:2px solid var(--line);border-radius:14px;padding:12px 14px;margin:10px 0}.corr.ok{border-color:#b8e4ad}.corr.ko{border-color:#f5b8ba;background:snow}.corr-head{margin:0 0 6px}.corr.ok .corr-head span{color:var(--green-d)}.corr.ko .corr-head span{color:var(--wrong-d)}.corr-line{margin:2px 0}.corr-line.right b{color:var(--green-d)}.corr-expl{color:var(--muted);font-size:.92rem;margin:6px 0 0}