:root{
  /* Negatoscópio: fundo de filme escuro, luz ciano do visor para ação, ouro para XP. App de uma coluna com abas embaixo. */
  --bg:#0a1519; --panel:#11222a; --panel2:#16303a; --line:#21404c; --ink:#e4f1f4; --mute:#89a8b3;
  --accent:#5fd0e3; --xp:#f2c45a; --ok:#4fd18b; --bad:#ff7a7a;
  --c-lp:#b9a2ff; --c-le:#f2c45a; --c-ps:#7fd99a; --c-es:#5fd0e3;
  --f-disp:"Barlow Condensed","Arial Narrow",sans-serif;
  --f-body:"Source Sans 3",system-ui,sans-serif;
  --f-num:"JetBrains Mono",ui-monospace,monospace;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--ink);font:16px/1.5 var(--f-body);-webkit-tap-highlight-color:transparent}
main{max-width:600px;margin:0 auto;padding:16px 16px 100px;display:flex;flex-direction:column;gap:14px}
h1,h2,h3{font-family:var(--f-disp);margin:0;letter-spacing:.01em;text-wrap:balance}
h1{font-size:28px;line-height:1.05}h2{font-size:21px}h3{font-size:14px;color:var(--mute);text-transform:uppercase;letter-spacing:.08em;font-weight:700}
.num{font-family:var(--f-num);font-variant-numeric:tabular-nums}
.mute{color:var(--mute)}.small{font-size:14px}.tiny{font-size:12px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px;display:flex;flex-direction:column;gap:10px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.between{justify-content:space-between}
.stack{display:flex;flex-direction:column;gap:8px}
.pill{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;font-size:13px;font-weight:700;border:1px solid var(--line)}
.p-ok{background:color-mix(in srgb,var(--ok) 16%,transparent);color:var(--ok);border-color:transparent}
.p-bad{background:color-mix(in srgb,var(--bad) 16%,transparent);color:var(--bad);border-color:transparent}
.p-xp{background:color-mix(in srgb,var(--xp) 16%,transparent);color:var(--xp);border-color:transparent}
.p-ac{background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent);border-color:transparent}
button{font:inherit;color:var(--ink);background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-weight:700;cursor:pointer}
button.primary{background:var(--accent);border-color:var(--accent);color:#04252c}
button.ghost{background:transparent}
button:disabled{opacity:.4;cursor:not-allowed}
button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px}
a{color:var(--accent)}
.hero{background:linear-gradient(160deg,var(--panel2),var(--panel));border-color:color-mix(in srgb,var(--accent) 35%,var(--line))}
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.tile{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:10px;display:flex;flex-direction:column;gap:2px}
.tile b{font-family:var(--f-num);font-size:22px}
.bar{height:8px;background:var(--bg);border-radius:6px;border:1px solid var(--line);overflow:hidden}
.bar>div{height:100%;background:var(--accent)}
.disc{display:inline-block;width:10px;height:10px;border-radius:3px;flex:none}
.mod{display:grid;grid-template-columns:1fr auto;gap:6px 10px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line);cursor:pointer;text-align:left;background:none;border-left:0;border-right:0;border-top:0;border-radius:0;font-weight:400;width:100%}
.mod:last-child{border-bottom:0}
.mod .t{font-weight:700}
.mod .bar{grid-column:1/-1}
nav{position:fixed;bottom:0;left:0;right:0;background:color-mix(in srgb,var(--bg) 94%,black);border-top:1px solid var(--line);display:flex;justify-content:center;padding:6px 4px calc(6px + env(safe-area-inset-bottom));z-index:5}
nav .in{display:flex;max-width:600px;width:100%}
nav button{flex:1;background:none;border:0;color:var(--mute);font-size:12px;font-weight:600;padding:6px 0;display:flex;flex-direction:column;gap:2px;align-items:center;border-radius:8px}
nav svg{width:22px;height:22px}
nav button.on{color:var(--accent)}
section[data-tab]{display:none;flex-direction:column;gap:14px}
section[data-tab].on{display:flex}
/* player */
#player{position:fixed;inset:0;background:var(--bg);z-index:20;display:none;overflow:auto}
#player.on{display:block}
#player .wrap{max-width:600px;margin:0 auto;padding:14px 16px calc(28px + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:14px;min-height:100%}
.ptop{display:flex;align-items:center;gap:10px}
.ptop .bar{flex:1}
.lesson{font-size:17px;line-height:1.6}
.lesson b{color:#fff}
.opt{display:flex;gap:12px;align-items:flex-start;text-align:left;font-weight:500;padding:13px 14px;background:var(--panel);width:100%}
.opt .k{font-family:var(--f-num);font-weight:700;color:var(--mute);flex:none;width:18px}
.opt.sel{border-color:var(--accent)}
.opt:disabled{opacity:1;cursor:default}
.opt:disabled:not(.right):not(.wrong){opacity:.55}
.opt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,var(--panel))}
.opt.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 14%,var(--panel))}
.opt.right .k{color:var(--ok)}.opt.wrong .k{color:var(--bad)}
.stem{font-size:17px;line-height:1.55}
.fb{border-radius:12px;padding:12px 14px;border:1px solid var(--line)}
.fb.ok{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 10%,transparent)}
.fb.no{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 10%,transparent)}
.pop{animation:pop .35s ease}
@keyframes pop{0%{transform:scale(.96);opacity:.4}100%{transform:scale(1);opacity:1}}
.combo{font-family:var(--f-disp);font-size:18px;color:var(--xp)}
.big{font-family:var(--f-disp);font-size:44px;font-weight:700;line-height:1}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:7px 4px;border-bottom:1px solid var(--line)}
th{color:var(--mute);font-weight:600}
td.r,th.r{text-align:right}
.link{display:flex;flex-direction:column;gap:2px;padding:10px 0;border-bottom:1px solid var(--line);text-decoration:none}
.link:last-child{border-bottom:0}
.link span{color:var(--ink);font-weight:600}
.link i{font-style:normal;color:var(--mute);font-size:13px}
.sync{font-size:12px}
.stripe{border-left:4px solid var(--accent);padding-left:12px}
.toggle{display:flex;align-items:center;gap:10px;cursor:pointer}
.toggle input{width:22px;height:22px;accent-color:var(--accent)}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media (max-width:380px){.tiles{grid-template-columns:1fr 1fr}}
/* plataforma: telas de entrada, login e bloqueio */
[hidden]{display:none!important}
.screen{max-width:600px;margin:0 auto;padding:24px 16px 40px;display:flex;flex-direction:column;gap:14px}
#bloqueio{position:fixed;inset:0;z-index:30;background:var(--bg);overflow:auto}
#formLogin input{width:100%}
a.opt{text-decoration:none;color:inherit}
body:not(.app-on) nav{display:none}
.mod:disabled{opacity:.55;cursor:default}