/* Memora: biblioteca em cartões → material com abas em pílula; marca-texto amarelo como assinatura */
:root{
  --paper:#F3F5FA; --surface:#FFFFFF; --ink:#141B34; --muted:#646C8A; --line:#E3E7F1;
  --accent:#3347D6; --accent-2:#5A6CF0; --accent-ink:#FFFFFF; --accent-soft:#EBEEFD; --mark:#FFE16A;
  --good:#17845A; --bad:#C43C35; --warn:#A86A0C;
  --shadow:0 1px 2px rgba(20,27,52,.05), 0 8px 24px rgba(20,27,52,.06);
  --radius:18px;
  --f-display:ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --f-body:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --f-mono:ui-monospace, Menlo, "Roboto Mono", Consolas, monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){ :root{
  --paper:#0C1020; --surface:#151A2E; --ink:#E9ECF7; --muted:#9AA2C2; --line:#262D4A;
  --accent:#8C9BFF; --accent-2:#A9B4FF; --accent-ink:#0C1020; --accent-soft:#1E2547; --mark:rgba(255,222,90,.34);
  --good:#5BC594; --bad:#F0837B; --warn:#E3B45A;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  color-scheme:dark }}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.55;
  padding-bottom:env(safe-area-inset-bottom,0px);-webkit-tap-highlight-color:transparent;-webkit-font-smoothing:antialiased}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{font-family:var(--f-display);line-height:1.2;text-wrap:balance;margin:0;letter-spacing:-.01em}
p{margin:0}
.hl{background:linear-gradient(transparent 60%, var(--mark) 60%, var(--mark) 92%, transparent 92%);padding:0 .08em}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:8px}
[hidden]{display:none!important}

/* barra superior */
.top{position:sticky;top:0;z-index:5;background:color-mix(in srgb, var(--paper) 88%, transparent);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);
  padding:calc(env(safe-area-inset-top,0px) + 8px) max(12px, env(safe-area-inset-right,0px)) 8px max(12px, env(safe-area-inset-left,0px));
  display:flex;align-items:center;gap:8px;min-height:54px}
.top .brand{font-family:var(--f-display);font-weight:800;font-size:22px;flex:1;padding-left:4px}
.top .t{flex:1;min-width:0;font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:0;transition:opacity .2s}
.top.scrolled .t{opacity:1}
.icon-btn{border:0;background:none;width:40px;height:40px;border-radius:12px;cursor:pointer;color:var(--ink);display:grid;place-items:center;flex:none}
.icon-btn:active{background:var(--accent-soft)}
.icon-btn svg{width:22px;height:22px}

main{padding:4px max(16px, env(safe-area-inset-right,0px)) 48px max(16px, env(safe-area-inset-left,0px));max-width:760px;margin:0 auto}
.btn{border:1px solid var(--line);background:var(--surface);border-radius:14px;padding:12px 18px;cursor:pointer;font-weight:700;min-height:48px;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent;box-shadow:0 6px 18px color-mix(in srgb, var(--accent) 30%, transparent)}
.btn.ghost{border-color:transparent;background:none}
.btn.block{width:100%}
.btn:disabled{opacity:.5}
.stack{display:flex;flex-direction:column;gap:14px}
.card{background:var(--surface);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.card h3{font-size:17px;margin-bottom:10px}
.muted{color:var(--muted)}
.small{font-size:13px}

/* biblioteca */
.lib-hero{padding:18px 2px 20px}
.lib-hero h1{font-size:30px;font-weight:800}
.lib-hero p{color:var(--muted);margin-top:4px}
.install{display:flex;gap:14px;align-items:flex-start;background:var(--accent-soft);border-radius:var(--radius);padding:16px;margin-bottom:18px}
.install .ic{width:40px;height:40px;border-radius:12px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;flex:none}
.install .ic svg{width:22px;height:22px}
.install b{display:block;margin-bottom:4px}
.install ol{margin:6px 0 8px;padding-left:18px;font-size:14px}
.install .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:8px}
.mats{display:flex;flex-direction:column;gap:12px;list-style:none;margin:0 0 18px;padding:0}
.mat{width:100%;text-align:left;border:0;background:var(--surface);border-radius:var(--radius);padding:18px;cursor:pointer;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow);transition:transform .15s}
.mat:active{transform:scale(.985)}
.mat strong{font-family:var(--f-display);font-size:19px;line-height:1.25}
.prog{height:8px;border-radius:8px;background:var(--line);overflow:hidden}
.prog i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:8px}
.mat .meta{display:flex;justify-content:space-between;gap:8px;font-size:13px;color:var(--muted)}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--mark);margin-right:6px;vertical-align:middle}
.empty{text-align:center;padding:36px 16px;color:var(--muted)}
.empty .ill{width:72px;height:72px;margin:0 auto 14px;border-radius:22px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center}
.empty .ill svg{width:34px;height:34px}
.empty b{display:block;color:var(--ink);font-size:18px;margin-bottom:6px;font-family:var(--f-display)}

/* material */
.mhead{padding:8px 2px 14px}
.mhead h1{font-size:clamp(24px,7vw,32px);font-weight:800}
.tabs{position:sticky;top:calc(env(safe-area-inset-top,0px) + 54px);z-index:4;display:flex;gap:8px;overflow-x:auto;margin:0 -16px 18px;padding:8px 16px;scrollbar-width:none;background:color-mix(in srgb, var(--paper) 88%, transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.tabs::-webkit-scrollbar{display:none}
.tabs button{border:1px solid var(--line);background:var(--surface);padding:9px 15px;border-radius:999px;cursor:pointer;white-space:nowrap;color:var(--muted);font-weight:700;font-size:14px}
.tabs button[aria-selected="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.chips{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;margin-bottom:14px}
.chips::-webkit-scrollbar{display:none}
.chips button{border:1px solid var(--line);background:none;padding:6px 12px;border-radius:999px;font-size:13px;font-weight:700;color:var(--muted);white-space:nowrap;cursor:pointer}
.chips button[aria-pressed="true"]{background:var(--accent-soft);color:var(--accent);border-color:transparent}
.tag{display:inline-block;font-size:11px;letter-spacing:.06em;text-transform:uppercase;font-weight:800;color:var(--accent);background:var(--accent-soft);padding:3px 9px;border-radius:999px}

/* resumo */
.key3{display:flex;flex-direction:column;gap:12px;counter-reset:k}
.key3 div{display:grid;grid-template-columns:28px minmax(0,1fr);gap:12px;font-weight:600;counter-increment:k}
.key3 div::before{content:counter(k);width:28px;height:28px;border-radius:50%;background:var(--mark);color:#141B34;display:grid;place-items:center;font-weight:800;font-size:14px}
details.sec{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
details.sec > summary{list-style:none;cursor:pointer;padding:16px 18px;display:flex;align-items:center;gap:10px;font-family:var(--f-display);font-weight:800;font-size:17px}
details.sec > summary::-webkit-details-marker{display:none}
details.sec > summary::after{content:"";margin-left:auto;width:9px;height:9px;border-right:2.5px solid var(--muted);border-bottom:2.5px solid var(--muted);transform:rotate(45deg);transition:transform .2s;flex:none}
details.sec[open] > summary::after{transform:rotate(-135deg)}
details.sec .count{font-family:var(--f-body);font-size:12px;font-weight:700;color:var(--muted);background:var(--paper);padding:2px 8px;border-radius:999px}
.sec-body{padding:0 18px 18px;display:flex;flex-direction:column;gap:18px}
.topic h4{font-size:16px;margin-bottom:6px}
ul.points{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:5px}
dl.terms{margin:0;display:flex;flex-direction:column;gap:12px}
dl.terms dt{font-weight:700}
dl.terms dd{margin:2px 0 0;color:var(--muted)}
.qlist{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:8px}

/* flashcards */
.boxes{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;margin-bottom:14px}
.box{padding:10px 4px;border-radius:14px;background:var(--surface);text-align:center;box-shadow:var(--shadow)}
.box b{display:block;font-family:var(--f-mono);font-size:18px;font-variant-numeric:tabular-nums}
.box small{color:var(--muted);font-size:11px}
.fc{perspective:1200px;cursor:pointer;touch-action:manipulation}
.fc-in{position:relative;min-height:300px;transition:transform .5s cubic-bezier(.2,.7,.2,1);transform-style:preserve-3d}
.fc.flip .fc-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;-webkit-backface-visibility:hidden;backface-visibility:hidden;border-radius:24px;background:var(--surface);box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:28px 24px;gap:14px;overflow:auto}
.face.back{transform:rotateY(180deg);background:linear-gradient(160deg,var(--accent-soft),var(--surface))}
.face .lbl{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:800}
.face p{font-size:20px;font-weight:700;line-height:1.4}
.face.back p{font-weight:500;font-size:18px}
.hint{text-align:center;color:var(--muted);font-size:13px;margin-top:12px}
.grade{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}
.g-bad{color:var(--bad)} .g-warn{color:var(--warn)} .g-good{color:var(--good)}
@media (prefers-reduced-motion: reduce){.fc-in{transition:none}}

/* mnemônicos */
.mn{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px}
.mn .card{display:flex;flex-direction:column;gap:10px}
.mn .what{font-size:13px;color:var(--muted)}
.mn .big{font-family:var(--f-display);font-size:20px;font-weight:800;line-height:1.3}
.mn .row{display:flex;gap:6px;flex-wrap:wrap}

/* palácio */
.zone{margin:22px 0 12px}
.zone:first-child{margin-top:0}
ol.route{list-style:none;margin:0;padding:0}
ol.route li{display:grid;grid-template-columns:40px minmax(0,1fr);gap:14px;position:relative;padding-bottom:18px}
ol.route li::after{content:"";position:absolute;left:19px;top:42px;bottom:2px;width:2px;background:var(--line)}
ol.route li:last-child::after{display:none}
.stop{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;font-family:var(--f-mono);font-weight:700;background:var(--mark);color:#141B34}
.route h4{margin:8px 0 4px;font-size:16px}
.route details{margin-top:6px;font-size:14px;color:var(--muted)}
.route summary{cursor:pointer;color:var(--accent);font-weight:700}

/* quiz */
.qbar{height:6px;border-radius:6px;background:var(--line);overflow:hidden;margin-bottom:14px}
.qbar i{display:block;height:100%;background:var(--accent)}
.opts{display:flex;flex-direction:column;gap:10px;margin:16px 0 4px}
.opt{text-align:left;padding:14px;border:1.5px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;display:flex;gap:12px;align-items:flex-start;min-height:52px}
.opt .l{width:26px;height:26px;border-radius:50%;background:var(--paper);display:grid;place-items:center;font-weight:800;font-size:13px;flex:none}
.opt.right{border-color:var(--good);background:color-mix(in srgb, var(--good) 10%, var(--surface))}
.opt.right .l{background:var(--good);color:#fff}
.opt.wrong{border-color:var(--bad);background:color-mix(in srgb, var(--bad) 10%, var(--surface))}
.opt.wrong .l{background:var(--bad);color:#fff}
.feedback{padding:14px;border-radius:14px;background:var(--accent-soft);font-size:15px;margin-top:10px}
.score{font-family:var(--f-display);font-size:44px;font-weight:800;color:var(--accent)}

/* mapa */
.mm{display:flex;flex-direction:column;align-items:center}
.mm-center{font-family:var(--f-display);font-weight:800;font-size:19px;padding:12px 22px;border-radius:999px;background:var(--ink);color:var(--paper);text-align:center}
.mm-trunk{width:2px;height:18px;background:var(--line)}
.mm-branches{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;width:100%}
.mm-b{border-radius:var(--radius);padding:14px 16px;background:var(--surface);box-shadow:var(--shadow);border-top:4px solid var(--c)}
.mm-b h4{margin:0 0 8px;font-size:15px}
.mm-b ul{margin:0;padding-left:18px;font-size:14px;color:var(--muted)}

/* feynman e revisões */
textarea{width:100%;border:1.5px solid var(--line);border-radius:14px;padding:14px;background:var(--paper);min-height:180px;resize:vertical;line-height:1.5}
.check{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}
.check:last-child{border-bottom:0}
.check input{width:20px;height:20px;margin-top:2px;flex:none;accent-color:var(--accent)}
.out{white-space:pre-wrap}
.plan{display:flex;flex-direction:column;gap:10px}
.plan label{display:grid;grid-template-columns:24px minmax(0,1fr) auto;gap:2px 12px;align-items:center;padding:14px 16px;border-radius:16px;background:var(--surface);box-shadow:var(--shadow);cursor:pointer}
.plan input{width:20px;height:20px;accent-color:var(--accent)}
.plan .d{font-weight:700}
.plan .t{grid-column:2;font-size:13px;color:var(--muted)}
.plan .pill{grid-row:1 / span 2;grid-column:3}
.pill{font-size:12px;font-weight:800;padding:4px 10px;border-radius:999px;white-space:nowrap;background:var(--paper);color:var(--muted)}
.pill.today{background:var(--mark);color:#141B34}
.pill.late{background:color-mix(in srgb, var(--bad) 14%, transparent);color:var(--bad)}
.pill.done{background:color-mix(in srgb, var(--good) 14%, transparent);color:var(--good)}

/* menu e aviso */
.sheet-bg{position:fixed;inset:0;background:rgba(8,11,24,.45);z-index:20;display:flex;align-items:flex-end;justify-content:center;animation:fade .15s}
.sheet{background:var(--surface);width:100%;max-width:560px;border-radius:24px 24px 0 0;padding:10px 16px calc(18px + env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;gap:10px}
.sheet .grab{width:40px;height:5px;border-radius:5px;background:var(--line);margin:4px auto 8px}
.sheet h3{font-size:18px}
.sheet p{color:var(--muted);font-size:14px}
.btn.danger{color:var(--bad)}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(22px + env(safe-area-inset-bottom,0px));background:var(--ink);color:var(--paper);padding:12px 18px;border-radius:14px;z-index:30;max-width:calc(100% - 32px);font-size:15px;box-shadow:0 10px 30px rgba(0,0,0,.25)}
@keyframes fade{from{opacity:0}to{opacity:1}}

/* conta: entrar, cadastro, código */
.demo{background:var(--mark);color:#141B34;border-radius:12px;padding:10px 14px;font-size:13px;margin:6px 0 14px}
.auth{max-width:420px;margin:12px auto 0;display:flex;flex-direction:column;gap:8px}
.auth-ic{width:56px;height:56px;border-radius:18px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;margin-bottom:8px}
.auth-ic svg{width:28px;height:28px}
.auth h1{font-size:28px;font-weight:800}
.auth form{margin-top:14px}
.alerta{background:var(--accent-soft);border-radius:12px;padding:12px 14px;font-size:14px}
.campo{display:flex;flex-direction:column;gap:6px}
.campo>span{font-weight:700;font-size:14px}
.campo input{width:100%;border:1.5px solid var(--line);border-radius:14px;padding:13px 14px;background:var(--surface);min-height:50px}
.campo input:focus,.campo textarea:focus{border-color:var(--accent);outline:none}
#cod{font-family:var(--f-mono);font-size:24px;letter-spacing:.4em;text-align:center}
.aceite{display:flex;gap:10px;align-items:flex-start;font-size:14px}
.aceite input{width:20px;height:20px;margin-top:2px;flex:none;accent-color:var(--accent)}
.aceite a,.small a{color:var(--accent)}
.links{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.link{border:0;background:none;color:var(--accent);font-weight:700;cursor:pointer;padding:8px 0}

/* topo logado */
.saldo{border:0;background:var(--mark);color:#141B34;font-weight:800;font-size:13px;padding:7px 12px;border-radius:999px;cursor:pointer;white-space:nowrap}

/* gerar */
.drop{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;padding:26px 16px;border:2px dashed var(--line);border-radius:var(--radius);background:var(--surface);cursor:pointer}
.drop svg{width:34px;height:34px;color:var(--accent)}
.drop b{font-family:var(--f-display);font-size:17px;word-break:break-word}
.opcoes-q{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.q{display:flex;flex-direction:column;gap:4px;padding:14px;border:1.5px solid var(--line);border-radius:16px;background:var(--surface);cursor:pointer;position:relative}
.q input{position:absolute;opacity:0;pointer-events:none}
.q.on{border-color:var(--accent);background:var(--accent-soft)}
.q .custo{margin-top:6px;font-weight:800;color:var(--accent);font-size:14px}
textarea:disabled{opacity:.5}
.spin{width:28px;height:28px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--accent);animation:gira 1s linear infinite;margin:4px auto 10px}
#progresso{text-align:center}
@keyframes gira{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion: reduce){.spin{animation-duration:3s}}

/* créditos e conta */
.tabela{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}
.tabela th,.tabela td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line)}
.tabela th{color:var(--muted);font-weight:700;font-size:12px}
.tabela td.pos{color:var(--good);font-weight:800;text-align:right}
.tabela td.neg{color:var(--bad);font-weight:800;text-align:right}
.pacote{display:flex;flex-direction:column;gap:12px}
.pacote.destaque{outline:2px solid var(--accent)}
.pacote .tag{align-self:flex-start}
.pac-linha{display:flex;justify-content:space-between;align-items:center;gap:10px}
.pac-linha>div{display:flex;flex-direction:column}
.pac-nome{font-family:var(--f-display);font-size:20px}
.pac-preco{font-family:var(--f-display);font-size:22px;color:var(--accent)}