:root{--ink:#16313a;--muted:#5b7078;--line:#d9e6e5;--bg:#f5f9f8;--card:#fff;--brand:#0f6e6e;--brand-d:#0a5252;--brand-l:#e3f4f2;--accent:#e8741a;--accent-l:#fff1e3;--ok:#1b7a3e;--ok-l:#e5f6ea;--bad:#b3261e;--bad-l:#fdecea;--warn:#8a5a00;--warn-l:#fff5dc;--r:18px;--shadow:0 6px 22px rgba(16,60,64,.08);--tap:48px;font-size:17px}
body[data-profile=camila]{--brand:#1464b4;--brand-d:#0d4a88;--brand-l:#e6f0fb;font-size:19px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;line-height:1.55;-webkit-text-size-adjust:100%}
h1,h2,h3{line-height:1.25;margin:.2em 0 .45em}h1{font-size:clamp(1.55rem,4vw,2.1rem)}h2{font-size:1.25rem}h3{font-size:1.1rem}p{margin:.4em 0}
a{color:var(--brand)}button{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:8px}
.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:10px;z-index:99}.skip:focus{left:8px}
.muted{color:var(--muted)}.meta{color:var(--muted);font-size:.9rem}.fine{color:var(--muted);font-size:.85rem}.error{color:var(--bad);font-weight:700}.center{text-align:center}
[hidden]{display:none!important}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:var(--tap);padding:10px 20px;border:2px solid var(--brand);border-radius:14px;background:var(--brand);color:#fff;font-weight:700;text-decoration:none;cursor:pointer;transition:background .15s,transform .1s}
.btn:hover{background:var(--brand-d);border-color:var(--brand-d)}.btn:active{transform:scale(.98)}
.btn.ghost{background:#fff;color:var(--brand)}.btn.ghost:hover{background:var(--brand-l)}
.btn.link{background:none;border-color:transparent;color:var(--brand);padding:8px 10px;text-decoration:underline}
.btn.danger{background:var(--bad);border-color:var(--bad)}.btn.sm{min-height:40px;padding:6px 14px;font-size:.9rem;border-radius:11px}.btn.lg{min-height:58px;font-size:1.1rem;padding:12px 30px}
.btn.finish{background:var(--accent);border-color:var(--accent)}.btn:disabled{opacity:.4;cursor:default;transform:none}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row.between{justify-content:space-between}
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar-in{max-width:1080px;margin:auto;padding:10px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--brand-d);text-decoration:none}
.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--brand);color:#fff;display:grid;place-items:center}
.user{display:flex;align-items:center;gap:10px}.avatar{width:36px;height:36px;border-radius:50%;background:var(--brand-l);color:var(--brand-d);display:grid;place-items:center;font-weight:800}
.wrap{max-width:1080px;margin:auto;padding:22px 18px 60px;outline:none}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow);margin:16px 0}
.card.narrow{max-width:620px;margin:24px auto}
.hero{background:linear-gradient(135deg,var(--brand-d),var(--brand));color:#fff;border-radius:24px;padding:26px 28px;margin-bottom:18px}
.hero p{opacity:.95}.eyebrow{font-size:.85rem;font-weight:700;letter-spacing:.03em;text-transform:uppercase;opacity:.85}
.section-title{margin:26px 0 10px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:16px}.grid.two{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.back{display:inline-block;margin-bottom:12px;font-weight:700;text-decoration:none;padding:8px 0}
.skeleton{height:320px;border-radius:24px;background:linear-gradient(90deg,#e9f1f0,#f6faf9,#e9f1f0);background-size:200% 100%;animation:sk 1.2s infinite}@keyframes sk{to{background-position:-200% 0}}
.center-screen{min-height:70vh;display:grid;place-content:center;text-align:center;padding:20px}
.spinner{width:44px;height:44px;margin:10px auto;border:5px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.tag{display:inline-block;padding:4px 11px;border-radius:999px;background:var(--brand-l);color:var(--brand-d);font-size:.8rem;font-weight:700}
.tag.ok{background:var(--ok-l);color:var(--ok)}.tag.bad{background:var(--bad-l);color:var(--bad)}.tag.warn{background:var(--warn-l);color:var(--warn)}
.pill.light{background:rgba(255,255,255,.18);padding:6px 12px;border-radius:999px;font-weight:700}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0;position:sticky;top:64px;z-index:5;background:var(--bg);padding:6px 0}
.chip{min-height:44px;padding:6px 16px;border-radius:999px;border:2px solid var(--line);background:#fff;font-weight:700;cursor:pointer}.chip b{margin-left:4px}.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.activity{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px;border-top:5px solid var(--brand)}
.activity.is-done{border-top-color:var(--ok)}.activity .row{margin-top:auto;padding-top:10px}.activity-top{display:flex;gap:6px;flex-wrap:wrap}.activity.big h3{font-size:1.3rem}
.feature{display:flex;align-items:center;gap:18px;padding:22px 24px;border-radius:24px;background:linear-gradient(135deg,#ffb84d,#e8741a);color:#fff;text-decoration:none;box-shadow:0 10px 26px rgba(232,116,26,.3);margin:6px 0 10px;transition:transform .15s}
.feature:hover{transform:translateY(-2px)}.feature-icon{font-size:2.4rem;width:64px;height:64px;border-radius:18px;background:rgba(255,255,255,.25);display:grid;place-items:center}
.feature-text{display:flex;flex-direction:column;flex:1}.feature-text strong{font-size:1.35rem}.feature-go{font-size:2.4rem;font-weight:300}
.plan{border-left:6px solid var(--accent)}
.timeline{list-style:none;padding:0}.timeline li{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin:10px 0}.timeline li.now{border:3px solid var(--accent);box-shadow:0 0 0 5px var(--accent-l)}
.check{display:flex;gap:12px;align-items:center;min-height:44px;cursor:pointer}.check input{width:22px;height:22px;accent-color:var(--brand)}
.field{display:block;margin-bottom:12px}.field span{display:block;font-weight:700;margin-bottom:6px}
textarea{width:100%;border:2px solid var(--line);border-radius:12px;padding:12px;font:inherit}textarea:focus{border-color:var(--brand);outline:none}
.history,.admin-list{list-style:none;padding:0;margin:0}.history li,.admin-list li{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);flex-wrap:wrap}
.history li:last-child,.admin-list li:last-child{border:0}.history li>div:first-child,.admin-list li>div:first-child{display:flex;flex-direction:column}
.history-score{display:flex;align-items:center;gap:10px}.score{font-weight:800;font-size:1.1rem;color:var(--brand-d)}
.archived summary{cursor:pointer;font-weight:700;min-height:40px}.archived .row{margin-top:12px}
.login{min-height:100vh;display:grid;grid-template-columns:1.2fr 1fr}
.login-art{background:linear-gradient(145deg,#0a5252,#0f6e6e);color:#fff;padding:clamp(28px,7vw,90px);display:flex;flex-direction:column;justify-content:center}
.login-art h1{font-size:clamp(2rem,5vw,3.2rem)}.login-box{padding:40px;display:flex;flex-direction:column;justify-content:center;max-width:460px;margin:auto;width:100%}
.btn.google{background:#fff;color:var(--ink);border-color:var(--line);min-height:56px}.btn.google .g{font-weight:900;color:#4285f4;font-size:1.2rem}
.exam{min-height:100vh;display:flex;flex-direction:column;background:#fff}
.exam-bar{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:12px;padding:10px 16px;background:#fff;border-bottom:1px solid var(--line)}
.exam-title{flex:1;font-weight:800;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:1.15rem;padding:8px 14px;border-radius:12px;background:var(--brand-l);color:var(--brand-d);min-width:88px;text-align:center}
.timer.low{background:var(--warn-l);color:var(--warn)}.timer.final{background:var(--bad-l);color:var(--bad);animation:pulse 1.2s infinite}@keyframes pulse{50%{transform:scale(1.06)}}
.exam-progress{display:flex;align-items:center;gap:12px;padding:8px 16px;background:var(--bg);font-size:.9rem;color:var(--muted)}
.bar{flex:1;height:10px;background:var(--line);border-radius:99px;overflow:hidden}.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--accent));transition:width .25s}
.exam-main{flex:1;width:100%;max-width:980px;margin:0 auto;padding:18px 16px 120px}
.exam-nav{position:fixed;left:0;right:0;bottom:0;z-index:20;display:grid;grid-template-columns:1fr auto 1fr;gap:10px;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(0,0,0,.05)}
.exam-nav .btn{min-height:56px}
.q-count{font-weight:800;color:var(--brand-d);margin:0}.q-text{font-size:clamp(1.15rem,2.6vw,1.45rem);font-weight:700;margin:10px 0 18px}
.q-figure{margin:0 0 16px;text-align:center}.q-figure img{max-width:100%;max-height:340px;border-radius:12px;border:1px solid var(--line)}.img-error{padding:16px;background:var(--bad-l);color:var(--bad);border-radius:12px;font-weight:700}
.options{display:grid;gap:12px}
.option{display:flex;align-items:center;gap:14px;width:100%;min-height:64px;padding:12px 16px;text-align:left;background:#fff;border:2px solid var(--line);border-radius:16px;cursor:pointer;transition:border-color .12s,background .12s}
.option:hover{border-color:var(--brand)}.option.selected{border-color:var(--brand);background:var(--brand-l);box-shadow:0 0 0 3px var(--brand-l)}
.option .letter{flex:0 0 42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:900;background:var(--bg);border:2px solid var(--line)}
.option.selected .letter{background:var(--brand);border-color:var(--brand);color:#fff}
.hint{color:var(--muted);font-size:.9rem;margin-top:14px}
.modal{position:fixed;inset:0;z-index:50;background:rgba(10,40,45,.55);display:grid;place-items:center;padding:16px;animation:fade .15s}@keyframes fade{from{opacity:0}}
.modal-box{background:#fff;border-radius:22px;padding:26px;width:100%;max-width:520px;box-shadow:0 30px 80px rgba(0,0,0,.3)}
.modal-box.warn{border-top:8px solid var(--bad)}.modal-actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap;margin-top:18px}
.qmap{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:12px}
.qdot{min-height:52px;border-radius:14px;border:2px solid var(--line);background:#fff;font-weight:800;font-size:1.05rem;cursor:pointer}.qdot.done{background:var(--ok-l);border-color:#62c285}.qdot.current{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-l)}
.obmep{background:linear-gradient(135deg,#d95f0e,#f39a2b)}
.paper{background:#eef2f3;border-radius:18px;padding:10px;margin:12px 0 6px;min-height:220px;display:flex;justify-content:center;align-items:flex-start;overflow:auto;-webkit-overflow-scrolling:touch}
.paper.small{min-height:120px}
.paper canvas{display:block;max-width:100%;height:auto;background:#fff;border-radius:8px;box-shadow:0 3px 14px rgba(0,0,0,.12)}
.paper.zoomed{justify-content:flex-start;max-height:70vh}.paper.zoomed canvas{max-width:none}
.zoom{display:flex;gap:6px}
.q-ask{font-weight:800;font-size:1.15rem;margin:14px 0 8px}
.letters{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.letter-btn{min-height:72px;border-radius:18px;border:3px solid var(--line);background:#fff;font-size:1.7rem;font-weight:900;cursor:pointer;transition:transform .1s}
.letter-btn:hover{border-color:var(--brand)}.letter-btn:active{transform:scale(.96)}.letter-btn.selected{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 0 0 5px var(--brand-l)}
.steps{padding-left:22px}.steps li{margin:8px 0}
.drop{display:flex;flex-direction:column;align-items:center;gap:6px;padding:30px 16px;margin:14px 0;border:3px dashed var(--line);border-radius:18px;cursor:pointer;text-align:center}
.drop:hover,.drop.over{border-color:var(--brand);background:var(--brand-l)}.drop input{position:absolute;opacity:0;width:1px;height:1px}.drop:focus-within{outline:3px solid var(--accent)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:10px 0}.stats div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;text-align:center;display:flex;flex-direction:column}.stats strong{font-size:1.5rem;color:var(--brand-d)}.stats span{font-size:.85rem;color:var(--muted)}
.review{background:#fff;border:1px solid var(--line);border-left:6px solid var(--line);border-radius:16px;padding:18px;margin:12px 0}
.review.correta{border-left-color:var(--ok)}.review.incorreta{border-left-color:var(--bad)}.review.branco{border-left-color:#e0a800}
.explain{background:var(--brand-l);border-radius:12px;padding:12px 14px}
.answer-compare{display:flex;gap:14px;margin:12px 0}.answer-compare>div{display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 18px;border:1px solid var(--line);border-radius:14px}
.big-letter{font-size:1.8rem;font-weight:900;width:52px;height:52px;display:grid;place-items:center;border-radius:14px;background:var(--bg)}
.big-letter.correta{background:var(--ok-l);color:var(--ok)}.big-letter.incorreta{background:var(--bad-l);color:var(--bad)}.big-letter.branco{background:var(--warn-l);color:var(--warn)}
.facts{padding-left:20px}.facts li{margin:6px 0;font-size:1.05rem}
.toast{position:fixed;left:50%;bottom:100px;transform:translateX(-50%);z-index:60;background:var(--ink);color:#fff;padding:12px 20px;border-radius:14px;font-weight:700;box-shadow:0 10px 30px rgba(0,0,0,.25);transition:opacity .4s}
.toast.warn{background:var(--warn)}.toast.error{background:var(--bad)}.toast.out{opacity:0}
@media (max-width:760px){.login{grid-template-columns:1fr}.login-art{min-height:38vh}.user-name{display:none}.stats{grid-template-columns:repeat(2,1fr)}.exam-title{font-size:.9rem}.letters{gap:8px}.letter-btn{min-height:64px;font-size:1.45rem}.hero{padding:22px 18px}.zoom .btn{padding:6px 10px}}
@media (pointer:coarse){.btn.sm{min-height:44px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}