/* Identidade visual Escol.AI: fundo #050607, off-white, gradiente vermelho → violeta, fonte Aeonik. */
@font-face { font-family: Aeonik; src: url(/brand/Aeonik-Regular.woff2) format('woff2'); font-weight: 400; font-display: swap; }
@font-face { font-family: Aeonik; src: url(/brand/Aeonik-Medium.woff2) format('woff2'); font-weight: 500 800; font-display: swap; }

:root {
  --bg: #050607;
  --surface: #0e1012;
  --surface-2: #16191c;
  --line: rgba(230, 230, 219, .1);
  --text: #e6e6db;
  --muted: #8d8d86;
  --red: #c73646;
  --violet: #5b39ec;
  --grad: linear-gradient(120deg, #e0604f 0%, #c73646 35%, #8e3aa8 70%, #5b39ec 100%);
  --ok: #13a08a;
  --radius: 14px;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0; min-height: 100vh;
  font-family: Aeonik, system-ui, sans-serif; color: var(--text);
  background:
    radial-gradient(60vmax 50vmax at 0% 0%, rgba(199, 54, 70, .18), transparent 60%),
    radial-gradient(60vmax 50vmax at 100% 100%, rgba(91, 57, 236, .2), transparent 60%),
    var(--bg);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
main { max-width: 960px; margin: 0 auto; padding: 16px; }
h1, h2 { margin: .4em 0; font-weight: 500; letter-spacing: -.01em; }
h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
[hidden] { display: none !important; }
input, select, button, textarea { font: inherit; color: inherit; }
a { color: var(--text); }

/* Cabeçalho com a marca */
.brand { display: flex; align-items: center; gap: 12px; max-width: 960px; margin: 0 auto; padding: 20px 16px 4px; }
.brand img { height: 22px; width: auto; display: block; }
.brand .tag { font-size: .8rem; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); padding-left: 12px; border-left: 1px solid var(--line); }

input[type=text], input[type=password], input:not([type]), select {
  padding: 12px 14px; width: 100%;
  background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px;
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: var(--muted); }
input:focus, select:focus { outline: none; border-color: #8e3aa8; box-shadow: 0 0 0 3px rgba(142, 58, 168, .3); }
select option { background: var(--surface-2); }
input[type=file] { color: var(--muted); max-width: 100%; }
input[type=file]::file-selector-button { font: inherit; padding: 8px 12px; margin-right: 10px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface-2); color: var(--text); cursor: pointer; }

button {
  padding: 11px 20px; border: 0; border-radius: 999px; cursor: pointer; font-weight: 500;
  background: var(--grad); color: #fff;
  box-shadow: 0 6px 20px -8px rgba(142, 58, 168, .7);
  transition: transform .12s, filter .12s, opacity .12s;
}
button:hover:not(:disabled) { filter: brightness(1.1); }
button:active:not(:disabled) { transform: scale(.97); }
button:disabled { opacity: .4; cursor: default; }
button.secondary { background: transparent; color: var(--text); border: 1px solid var(--line); box-shadow: none; }
button.secondary:hover:not(:disabled) { background: var(--surface-2); filter: none; }
button.danger { background: transparent; color: #ec6b78; border: 1px solid rgba(199, 54, 70, .5); box-shadow: none; }
button.danger:hover:not(:disabled) { background: rgba(199, 54, 70, .15); filter: none; }

.card {
  background: linear-gradient(180deg, rgba(255,255,255,.025), transparent), var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; margin: 12px 0;
}
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.grow { flex: 1; }
.center { text-align: center; }
.error { color: #ec6b78; min-height: 1.2em; }
.muted { color: var(--muted); }
.big { font-size: 2.5rem; font-weight: 500; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Login e entrada do aluno: cartão centralizado */
.narrow { max-width: 420px; margin: 8vh auto 0; }
.narrow .mark { display: block; width: 72px; height: 72px; margin: 0 auto 8px; }
.narrow button[type=submit] { width: 100%; padding: 14px; font-size: 1.05rem; }

/* As 4 alternativas: cor + forma fazem parte da mecânica. Tons da paleta Escol.AI, bem distintos entre si. */
.answers { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.answer {
  display: flex; align-items: center; gap: 12px; padding: 18px; border-radius: var(--radius);
  color: #fff; font-size: 1.2rem; font-weight: 500; min-height: 80px; border: 0; text-align: left;
  box-shadow: inset 0 -4px 0 rgba(0,0,0,.25);
  transition: opacity .2s, transform .12s;
}
.answer::before { font-size: 1.6rem; opacity: .9; }
.a0 { background: #c73646; } .a0::before { content: "▲"; }
.a1 { background: #5b39ec; } .a1::before { content: "◆"; }
.a2 { background: #c98314; } .a2::before { content: "●"; }
.a3 { background: #13a08a; } .a3::before { content: "■"; }
.answer.dim { opacity: .2; }
button.answer { box-shadow: inset 0 -6px 0 rgba(0,0,0,.25); }
button.answer:active:not(:disabled) { transform: scale(.97); }
/* Celular do aluno: enunciado em cima, alternativas ocupam o resto da tela (forma em cima, texto embaixo). */
.player-question:not([hidden]) { display: flex; flex-direction: column; min-height: calc(100dvh - 86px); }
.player-q { font-size: clamp(1.15rem, 5vw, 1.6rem); line-height: 1.25; margin: 0 0 12px; overflow-wrap: anywhere; }
.qimage.player-qimage { max-height: 18dvh; max-width: 100%; object-fit: contain; margin: 0 auto 12px; }
.player-answers { flex: 1; grid-auto-rows: minmax(110px, 1fr); }
.player-answers .answer {
  flex-direction: column; justify-content: center; gap: 8px; min-height: 0; padding: 12px;
  font-size: clamp(.95rem, 4vw, 1.25rem); line-height: 1.2; text-align: center; overflow-wrap: anywhere; overflow: hidden;
}
.player-answers .answer::before { font-size: clamp(1.8rem, 9vw, 3.2rem); line-height: 1; }
.player-answers .answer:empty::before { font-size: 5rem; }

.qimage { display: block; max-width: 100%; max-height: 40vh; margin: 12px auto; border-radius: 10px; }
.bars { display: flex; gap: 12px; align-items: flex-end; height: 180px; margin: 16px 0; }
.bar { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; }
.bar div { width: 100%; border-radius: 8px 8px 0 0; min-height: 4px; transition: height .5s; }
.bar div::before { content: none; }

/* Tela do professor (projetor) */
.pin { font-size: clamp(3rem, 9vw, 5.5rem); font-weight: 500; letter-spacing: .12em; margin: .1em 0 .2em; line-height: 1; }
.qr { background: #fff; padding: 10px; border-radius: 12px; }
.timer {
  display: inline-grid; place-items: center; min-width: 72px; height: 72px; padding: 0 10px; border-radius: 999px;
  background: var(--grad); color: #fff; font-size: 2rem; font-weight: 500;
}
.timer:empty { display: none; }
#q-text { font-size: clamp(1.6rem, 3.6vw, 2.6rem); margin: .6em 0; }

.rank {
  display: flex; justify-content: space-between; align-items: center; padding: 14px 18px;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px; margin: 8px 0; font-size: 1.25rem;
}
.rank:first-child { border-color: transparent; background: linear-gradient(var(--surface), var(--surface)) padding-box, var(--grad) border-box; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--surface-2); border: 1px solid var(--line); border-radius: 999px; padding: 6px 8px 6px 14px; display: flex; gap: 6px; align-items: center; }
.chip button { padding: 0 6px; background: none; color: #ec6b78; box-shadow: none; }
.chip.offline { opacity: .45; }

.ok { background: var(--ok) !important; color: #fff; border-color: transparent !important; }
.ko { background: var(--red) !important; color: #fff; border-color: transparent !important; }
.ok .muted, .ko .muted { color: rgba(255,255,255,.8); }
.q-ok { width: 24px; height: 24px; flex: none; accent-color: #fff; }
.answer .q-ans { background: rgba(255,255,255,.92); color: #151515; border: 0; }
.answer .q-ans::placeholder { color: #777; }

.foot { text-align: center; color: var(--muted); font-size: .8rem; padding: 24px 16px; letter-spacing: .04em; }

@media (max-width: 560px) {
  .answer { font-size: 1rem; padding: 14px; }
  .card { padding: 16px; }
}

#question > .row { margin-bottom: 12px; }
.question .answers { margin-top: 12px; }