:root{--bg:#f6f3ec;--card:#fff;--card-soft:#fbfaf7;--ink:#1f2a24;--muted:#5f6862;--green:#1f6f43;--green-strong:#175634;--green-soft:#e3f0e7;--accent:#c2391f;--accent-soft:#fbe3d6;--amber:#8a5a00;--amber-soft:#fdf3d7;--line:#e4e0d6;--line-strong:#cfc9bb;--shadow:0 1px 2px #1f2a240f, 0 2px 10px #1f2a240d;--shadow-lift:0 2px 4px #1f2a2414, 0 8px 24px #1f2a241a;--focus:0 0 0 3px #1f6f4366;color:var(--ink);background:var(--bg);-webkit-tap-highlight-color:transparent;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.4}*{box-sizing:border-box}body{background:var(--bg);min-height:100dvh;margin:0}h1,h2,h3,h4{line-height:1.2}.icon{flex:none;width:1.25em;height:1.25em}button{font:inherit;color:inherit;border:1px solid var(--line);background:var(--card);cursor:pointer;border-radius:14px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 16px;transition:background-color .15s,border-color .15s,box-shadow .15s,transform .1s;display:inline-flex}button:active:not(:disabled){transform:scale(.97)}button:focus-visible,input:focus-visible,select:focus-visible{box-shadow:var(--focus);outline:none}button.primary{background:var(--green);border-color:var(--green);color:#fff;flex:1;font-weight:600}button.big{width:100%;min-height:54px;font-size:1.05rem}button.link{color:var(--green);background:0 0;border:none;padding:8px 10px;font-weight:500}button.danger{color:var(--accent)}button:disabled{opacity:.45;cursor:not-allowed}.icon-button{background:0 0;border:none;border-radius:50%;flex:none;width:44px;height:44px;padding:0}input,select{font:inherit;color:inherit;border:1px solid var(--line);background:var(--card);border-radius:12px;min-width:0;min-height:44px;padding:10px 12px;transition:border-color .15s,box-shadow .15s}.loading{min-height:50vh;color:var(--muted);place-content:center;justify-items:center;gap:12px;display:grid}.spinner{border:3px solid var(--line);border-top-color:var(--green);border-radius:50%;width:28px;height:28px;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.error{color:var(--accent);padding:16px}.eyebrow{color:var(--muted);margin:0;font-size:.85rem}.muted{color:var(--muted);font-weight:400}.hint{color:var(--muted);background:var(--green-soft);border-radius:12px;padding:10px 14px;font-size:.9rem}.hint.ok{color:var(--green);font-weight:600}.badge{background:var(--accent-soft);color:#9a3412;white-space:nowrap;border-radius:999px;align-items:center;gap:4px;padding:3px 10px;font-size:.8rem;font-weight:600;display:inline-flex}.badge.full{background:var(--green-soft);color:var(--green)}.badge .icon{width:1em;height:1em}.card{background:var(--card);box-shadow:var(--shadow);border-radius:16px;margin-bottom:12px;padding:14px 16px}.brand{align-items:center;gap:8px;font-weight:700;display:inline-flex}.brand .icon{color:var(--green)}.login{max-width:400px;min-height:100dvh;padding:32px 20px calc(32px + env(safe-area-inset-bottom));flex-direction:column;justify-content:center;gap:24px;margin:0 auto;display:flex}.login-brand{text-align:center}.login-brand h1{margin:12px 0 6px;font-size:2rem}.login-brand p{color:var(--muted);margin:0}.logo{background:var(--green);color:#fff;width:64px;height:64px;box-shadow:var(--shadow-lift);border-radius:20px;place-items:center;display:inline-grid}.logo .icon{width:34px;height:34px}.form{gap:14px;display:grid}.form.card{margin:0;padding:20px}.form label{color:var(--muted);gap:6px;font-size:.9rem;display:grid}.form .error{margin:0;padding:0}.home{max-width:560px;padding:12px 16px calc(32px + env(safe-area-inset-bottom));margin:0 auto}.app-bar{justify-content:space-between;align-items:center;min-height:48px;display:flex}.greeting{margin:12px 0 16px;font-size:1.8rem}.continue-card{text-align:left;background:var(--green);color:#fff;width:100%;box-shadow:var(--shadow-lift);border:none;border-radius:20px;justify-content:space-between;gap:16px;padding:18px 18px 18px 20px}.continue-text{gap:2px;min-width:0;display:grid}.continue-text .eyebrow{color:#fffc;text-transform:uppercase;letter-spacing:.04em;font-size:.75rem;font-weight:600}.continue-text strong{font-size:1.25rem}.continue-text span:last-child{opacity:.9;font-size:.9rem}.continue-go{background:#ffffff2e;border-radius:50%;flex:none;place-items:center;width:48px;height:48px;display:grid}.subject-name{margin:28px 0 2px;font-size:1.4rem}.chapter-name{color:var(--muted);margin:4px 0 12px;font-size:1rem;font-weight:600}.topic{background:var(--card);box-shadow:var(--shadow);border-radius:20px;margin-bottom:14px;padding:16px}.topic-head{justify-content:space-between;align-items:flex-start;gap:8px;display:flex}.topic h4{margin:2px 0 0;font-size:1.3rem}.topic-count{color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;padding-top:2px;font-size:.85rem}.meter{background:var(--green-soft);border-radius:3px;height:6px;margin:12px 0 4px;overflow:hidden}.meter span{background:var(--green);border-radius:3px;height:100%;transition:width .4s ease-out;display:block}.topic.locked{border:1px dashed var(--line-strong);box-shadow:none;background:0 0}.topic.locked h4,.locked-note{color:var(--muted)}.locked-note{align-items:center;gap:6px;margin:8px 0 0;font-size:.9rem;display:flex}.locked-note .icon{width:1em;height:1em}.sections{gap:8px;margin:12px 0 0;padding:0;list-style:none;display:grid}.section-row{text-align:left;background:var(--card-soft);justify-content:flex-start;gap:12px;width:100%;padding:12px 12px 12px 14px}.section-row .index{background:var(--green-soft);width:34px;height:34px;color:var(--green);border-radius:50%;flex:none;place-items:center;font-weight:700;display:grid}.section-row .index .icon{width:18px;height:18px}.section-row.passed .index{background:var(--green);color:#fff}.section-row .name{flex:1;gap:2px;font-weight:500;display:grid}.section-row .name small{color:var(--muted);font-size:.8rem;font-weight:400}.section-row .go{color:var(--muted)}.section-row.current{border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green)}.section-row.locked,.section-row.locked:disabled{opacity:1;color:var(--muted);background:0 0;border-style:dashed}.section-row.locked .index{background:var(--line);color:var(--muted)}.admin{max-width:1040px;margin:0 auto;padding:12px 16px 48px}.admin-header{border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:12px 16px;padding-bottom:12px;display:flex}.admin-header h1{flex:1;margin:0;font-size:1.3rem}.tabs{background:#ece8de;border-radius:14px;gap:2px;padding:4px;display:flex}.tabs button{min-height:36px;color:var(--muted);background:0 0;border:none;border-radius:10px;padding:6px 16px;font-weight:500}.tabs button.on{background:var(--card);color:var(--green);box-shadow:var(--shadow);font-weight:600}@media (width<=640px){.admin-header .tabs{order:1;width:100%}.admin-header .tabs button{flex:1}}.admin h2{flex-wrap:wrap;align-items:center;gap:12px;margin:24px 0 10px;font-size:1.15rem;display:flex}.card h2,.card h3{margin-top:0}.card-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.card-header h2{margin:0}.row-tools{vertical-align:middle;gap:4px;margin-left:8px;display:inline-flex}.row-tools button{border-radius:10px;min-height:32px;padding:4px 10px;font-size:.85rem;font-weight:400}.registry{margin-top:16px}.student-form{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));align-items:center;gap:8px;display:grid}.student-form h2{grid-column:1/-1;margin:0}.subject-block{border-top:1px solid var(--line);margin-top:12px;padding-top:8px}.subject-block h3{margin:4px 0}.chapter-block{border-left:3px solid var(--green-soft);margin:8px 0 8px 12px;padding-left:12px}.chapter-block h4{flex-wrap:wrap;align-items:center;gap:8px;margin:6px 0;display:flex}.topic-list{gap:4px;margin:4px 0 8px;padding-left:0;list-style:none;display:grid}.topic-list li{background:var(--bg);border-radius:10px;justify-content:space-between;align-items:center;gap:8px;padding:4px 4px 4px 10px;display:flex}.add-form{gap:6px;margin:8px 0;display:flex}.add-form input{flex:1}.toggle{color:var(--muted);align-items:center;gap:6px;font-size:.9rem;font-weight:400;display:inline-flex}.toggle input{min-height:auto;accent-color:var(--green)}.filters{gap:12px;margin:16px 0;display:flex}.filters label{color:var(--muted);align-items:center;gap:8px;display:inline-flex}.tiles{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;display:grid}.tile{background:var(--card);box-shadow:var(--shadow);border-radius:16px;gap:2px;padding:14px 16px;display:grid}.tile-label{color:var(--muted);font-size:.85rem}.tile-value{font-variant-numeric:tabular-nums;font-size:1.8rem}.tile .muted{font-size:.8rem}.table-scroll{overflow-x:auto}.admin table{border-collapse:collapse;width:100%;font-size:.9rem}.admin th{text-align:left;color:var(--muted);border-bottom:1px solid var(--line);white-space:nowrap;padding:6px 8px;font-size:.8rem;font-weight:600}.admin td{border-bottom:1px solid var(--line);vertical-align:top;padding:8px}.admin td.section-name{min-width:220px}.admin button.expand{text-align:left;min-height:auto;color:var(--ink);justify-content:flex-start;padding:0}.details-row>td{background:var(--bg)}.status.passed{color:var(--green);white-space:nowrap}.status.locked,.status.missing{color:var(--muted);white-space:nowrap}.section-details{gap:12px;margin:4px 0;display:grid}.bar{white-space:nowrap;align-items:center;gap:8px;display:inline-flex}.bar-track{background:var(--line);border-radius:4px;width:80px;height:8px;position:relative}.bar-fill{background:var(--green);border-radius:4px;position:absolute;inset:0 auto 0 0}.bar-mark{background:var(--ink);opacity:.45;width:2px;margin-left:-1px;position:absolute;top:-3px;bottom:-3px}.bar-value{font-variant-numeric:tabular-nums;min-width:3ch}.answers{margin:0;padding:0;list-style:none}.answer p{margin:4px 0}.answer .muted:first-child{font-size:.8rem}.answer-question{font-weight:600}.answer .mark{font-weight:700}.answer.ok .mark{color:var(--green)}.answer.miss{border-left:4px solid var(--accent)}.answer.miss .mark{color:var(--accent)}.admin-lessons{max-width:560px;margin-top:16px}.admin-lessons .search{width:100%;margin:4px 0}.chips{scrollbar-width:none;gap:6px;padding:6px 0 2px;display:flex;overflow-x:auto}.chip{white-space:nowrap;border-radius:999px;flex:none;min-height:36px;padding:6px 14px;font-size:.9rem}.chip.on{background:var(--green);border-color:var(--green);color:#fff}.admin-lessons .subject-name{margin:20px 0 10px;display:block}.chapter-card{margin-bottom:10px;padding:0;overflow:hidden}.toggle-row{text-align:left;background:0 0;border:none;border-radius:0;justify-content:flex-start;gap:12px;width:100%;padding:12px 16px}.toggle-row>:first-child{flex:1}.toggle-row .chevron{color:var(--muted);transition:transform .2s}.toggle-row[aria-expanded=true] .chevron{transform:rotate(90deg)}.chapter-toggle{padding:14px 16px}.chapter-toggle strong{font-size:1.05rem}.lesson-list{border-top:1px solid var(--line);margin:0;padding:0;list-style:none}.lesson-item+.lesson-item{border-top:1px solid var(--line)}.lesson-item .toggle-row{padding-left:20px}.lesson-name{font-weight:600}.lesson-item.open{background:var(--card-soft);padding-bottom:12px}.lesson-item .sections{margin:0 16px}.lesson-item .section-row{background:var(--card)}.lesson-item .locked-note,.lesson-item .error{margin:0 20px;padding:0}.player{max-width:560px;height:100dvh;padding:6px 16px calc(14px + env(safe-area-inset-bottom));flex-direction:column;margin:0 auto;display:flex}.player-header{flex:none;align-items:center;gap:4px;min-height:52px;margin-left:-10px;display:flex}.player-title{min-width:0;display:grid}.player-title span,.player-title strong{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.player-title span{color:var(--muted);font-size:.78rem}.player-title strong{font-size:1.02rem}.track{flex:none;gap:4px;margin:2px 0 10px;display:flex}.track i{background:var(--line);border-radius:2px;flex:1;height:4px;transition:background-color .3s}.track i.on{background:var(--green)}.track i.now{background:#1f6f4359}.stage{background:var(--card);overscroll-behavior:contain;min-height:0;box-shadow:var(--shadow);border-radius:20px;flex-direction:column;flex:1;gap:12px;margin:0 0 12px;padding:16px;display:flex;overflow-y:auto}.stage>*{flex:none}.stage-title{margin:0;font-size:1.5rem}.stage-visual{margin:0}.stage-visual img{border-radius:12px;max-width:100%;max-height:40dvh;margin:0 auto;display:block}.stage-visual svg{width:100%;max-height:38vh;display:block}.stage-visual figcaption{color:var(--muted);margin-top:6px;font-size:.8rem}.stage-items{gap:8px;margin:0;padding:0;list-style:none;display:grid}.stage-items .bullet{padding-left:18px;position:relative}.stage-items .bullet:before{content:"";background:var(--green);border-radius:50%;width:8px;height:8px;position:absolute;top:.55em;left:2px}.stage-items .term{background:var(--green-soft);border-radius:12px;gap:2px;padding:10px 12px;display:grid}.stage-items .term strong{color:var(--green)}.stage-items .tip{background:var(--amber-soft);border:1px dashed #d9a520;border-radius:12px;gap:4px;padding:10px 12px;display:grid}.stage-items .tip strong{color:var(--amber);align-items:center;gap:6px;font-size:.85rem;display:inline-flex}.caption{color:var(--muted);border-top:1px solid var(--line);margin:auto 0 0;padding-top:10px;font-size:.85rem}svg .label text,svg text.label{fill:var(--muted);font-size:15px}svg .label.active text,svg text.label.active{fill:var(--accent);font-weight:700}.enter{animation:.45s ease-out both enter}@keyframes enter{0%{opacity:0;transform:translateY(8px)}}.intro-card h2{margin:0 0 16px;font-size:1.6rem}.steps{gap:14px;margin:0;padding:0;list-style:none;display:grid}.steps li{align-items:flex-start;gap:12px;display:flex}.steps .icon{background:var(--green-soft);width:40px;height:40px;color:var(--green);border-radius:12px;padding:9px}.steps span{padding-top:2px}.best{background:var(--bg);border-radius:12px;margin:18px 0 0;padding:10px 14px;font-size:.9rem}.ready-card{background:var(--green-soft);border-radius:16px;gap:4px;padding:14px 16px;display:grid}.ready-card strong{color:var(--green);font-size:1.1rem}.ready-card span{font-size:.9rem}.question-card{background:var(--green-soft);z-index:1;box-shadow:0 -16px 0 var(--card);border-radius:16px;padding:14px 16px;position:sticky;top:-16px}.question-card .eyebrow{color:var(--green);font-weight:600}.question-card p{margin:6px 0 0;font-size:1.25rem;font-weight:600;line-height:1.35}.result-card h2{text-align:center;margin:0 0 6px;font-size:1.4rem}.verdict{color:#9a3412;text-align:center;margin:0 0 16px}.verdict.ok{color:var(--green)}.score{width:112px;height:112px;margin:4px auto 12px;position:relative}.score svg{width:100%;height:100%;transform:rotate(-90deg)}.score circle{fill:none;stroke-width:3.2px}.score-track{stroke:var(--line)}.score-fill{stroke:#d9a520;stroke-linecap:round;animation:.9s ease-out both score}.score.passed .score-fill{stroke:var(--green)}@keyframes score{0%{stroke-dasharray:0 100}}.score span{font-variant-numeric:tabular-nums;place-items:center;font-size:1.7rem;font-weight:700;display:grid;position:absolute;inset:0}.result-card ul{gap:8px;margin:0;padding:0;list-style:none;display:grid}.result-card li{background:var(--bg);border-radius:12px;align-items:flex-start;gap:10px;padding:10px 12px;display:flex}.result-card .mark{border-radius:50%;flex:none;place-items:center;width:22px;height:22px;font-weight:700;display:grid}.result-card .mark .icon{stroke-width:3px;width:14px;height:14px}.result-card .ok .mark{background:var(--green);color:#fff}.result-card .miss .mark{background:var(--accent);color:#fff}.result-card .skip{color:var(--muted)}.controls{flex:none}.controls .stack{text-align:center;gap:8px;display:grid}.controls .links{flex-wrap:wrap;justify-content:center;gap:4px 12px;display:flex}.transport{align-items:center;gap:8px;display:flex}.transport .round{border-radius:50%;flex:none;width:48px;height:48px;padding:0}.transport .round .icon{width:18px;height:18px}.transport .primary{border-radius:24px;min-height:48px}.transport .doubt{border-radius:24px;flex:none;min-height:48px}.talk{justify-items:center;gap:8px;display:grid}.transcript{overscroll-behavior:contain;gap:6px;width:100%;max-height:24dvh;margin:0;padding:0;font-size:.9rem;list-style:none;display:grid;position:relative;overflow-y:auto}.transcript li{border-radius:14px;max-width:85%;padding:8px 12px}.transcript .tutor{background:var(--card);box-shadow:var(--shadow);border-bottom-left-radius:4px;justify-self:start}.transcript .aluno{background:var(--green-soft);border-bottom-right-radius:4px;justify-self:end}.talk-status{color:var(--muted);text-align:center;margin:0;font-size:.9rem}.talk-status.alert{color:var(--accent)}.talk-actions{grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;width:100%;display:grid}.talk-actions .side{color:var(--muted);background:0 0;border:none;justify-items:center;gap:2px;padding:8px 4px;font-size:.8rem;line-height:1.2;display:grid}.talk-actions .side .icon{width:22px;height:22px;color:var(--green)}.talk-actions .side.alert,.talk-actions .side.alert .icon{color:var(--accent);font-weight:600}.ptt{background:var(--green);color:#fff;width:84px;height:84px;box-shadow:var(--shadow-lift);touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;border:none;border-radius:50%;transition:transform .15s}.ptt .icon{width:36px;height:36px}.ptt.speaking{box-shadow:0 0 0 8px #1f6f4326}.ptt.thinking{animation:1s ease-in-out infinite pulse}.recording{justify-items:center;gap:10px;width:100%;display:grid}.rec-time{font-variant-numeric:tabular-nums;align-items:center;gap:8px;font-size:1.4rem;display:flex}.rec-dot{background:var(--accent);border-radius:50%;width:12px;height:12px;animation:1s ease-in-out infinite pulse}.recording .row{gap:8px;width:100%;display:flex}.recording .row button{flex:1;min-height:54px}@keyframes pulse{50%{opacity:.6}}.debug{width:100%;color:var(--muted);gap:4px;font-size:.8rem;display:grid}.debug audio{width:100%}@media (hover:hover){button:hover:not(:disabled){border-color:var(--line-strong);background:var(--card-soft)}button.primary:hover:not(:disabled){background:var(--green-strong);border-color:var(--green-strong)}button.link:hover:not(:disabled){background:var(--green-soft)}.icon-button:hover:not(:disabled){background:var(--card)}input:hover,select:hover{border-color:var(--line-strong)}.continue-card:hover:not(:disabled){background:var(--green-strong)}.tabs button:not(.on):hover:not(:disabled){background:#fff9}.admin tbody tr:hover>td{background:var(--card-soft)}.admin tbody tr.details-row:hover>td,.details-row>td{background:var(--bg)}.ptt:hover:not(:disabled){background:var(--green-strong)}}@media (prefers-reduced-motion:reduce){.enter,.ptt.thinking,.rec-dot,.score-fill,.spinner{animation:none}button,.meter span,.track i{transition:none}}