/* BIOQUÍMICA — softwares educacionais · design system "Membrana"
 * Identidade: a bicamada lipídica pintada à mão das capas dos CDs (2000 e 2004),
 * laranja das bordas rasgadas do encarte, azul-marinho da capa de 2000,
 * proteínas de membrana coloridas que viram os ícones dos programas.
 * Sem dependências externas: funciona offline e aberto do disco. */

:root {
  /* paleta das capas */
  --laranja: #f0701f;
  --laranja-2: #f9a05a;
  --marinho: #123c6b;
  --marinho-2: #1f5a94;
  --vermelho: #d8261e;
  --gema: #f2c94c;
  /* proteínas da membrana (ícones dos programas) */
  --p-verde: #3aa65c;
  --p-amarelo: #d9c84a;
  --p-ciano: #3fb3d8;
  --p-laranja: #f08a4b;
  --p-roxo: #9b8fc9;
  --p-azul: #1f7fb5;
  --p-vermelho: #d9463b;
  --p-rosa: #d94f8a;

  /* superfícies: papel quente */
  --bg: #faf6f0;
  --bg-2: #f3ece2;
  --surface: #ffffff;
  --surface-2: #f5f0e8;
  --ink: #1a2433;
  --ink-2: #4a5566;
  --ink-3: #7b8595;
  --line: #e3dbcf;
  --line-2: #cfc4b3;
  --accent: var(--marinho-2);
  --accent-ink: #ffffff;
  --accent-soft: #e4eef9;
  --warm: var(--laranja);
  --warm-soft: #fde9d8;
  --ok: #2e7d32;
  --warn: #b25b00;
  --danger: #c62828;

  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow: 0 1px 2px rgba(40, 30, 10, .05), 0 10px 30px -12px rgba(40, 30, 10, .18);
  --shadow-lg: 0 2px 4px rgba(40, 30, 10, .06), 0 30px 60px -24px rgba(40, 30, 10, .3);

  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --display: "Trebuchet MS", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c1726; --bg-2: #101e30; --surface: #152336; --surface-2: #1c2d44;
    --ink: #eef1f5; --ink-2: #b9c3d1; --ink-3: #8390a3; --line: #27384f; --line-2: #35496a;
    --accent: #6cc3e6; --accent-ink: #0a1624; --accent-soft: #15344a;
    --warm: #f58a3f; --warm-soft: #3a2616;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px -12px rgba(0, 0, 0, .6);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, .5), 0 30px 60px -24px rgba(0, 0, 0, .8);
  }
}
:root[data-theme="dark"] {
  --bg: #0c1726; --bg-2: #101e30; --surface: #152336; --surface-2: #1c2d44;
  --ink: #eef1f5; --ink-2: #b9c3d1; --ink-3: #8390a3; --line: #27384f; --line-2: #35496a;
  --accent: #6cc3e6; --accent-ink: #0a1624; --accent-soft: #15344a;
  --warm: #f58a3f; --warm-soft: #3a2616;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px -12px rgba(0, 0, 0, .6);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .5), 0 30px 60px -24px rgba(0, 0, 0, .8);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
}
img, svg, canvas, video { max-width: 100%; }
a { color: var(--accent); }
h1, h2, h3, h4 { font-family: var(--display); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
small, .muted { color: var(--ink-3); }
sub, sup { line-height: 0; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid color-mix(in srgb, var(--warm) 60%, transparent); outline-offset: 2px; }

/* ---------- botões ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .45em;
  min-height: 42px; padding: .55em 1.1em;
  border: 1px solid var(--line-2); border-radius: 999px;
  background: var(--surface); color: var(--ink);
  font: inherit; font-weight: 600; font-size: .95rem; text-decoration: none;
  cursor: pointer; transition: background .15s, border-color .15s, transform .08s, box-shadow .15s;
}
.btn:hover { border-color: var(--accent); box-shadow: 0 2px 10px -4px rgba(0,0,0,.25); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; box-shadow: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.warm { background: var(--warm); border-color: var(--warm); color: #fff; }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--surface-2); box-shadow: none; }
.btn.sm { min-height: 34px; padding: .3em .8em; font-size: .85rem; }
.btn.square { border-radius: var(--radius-sm); }
.btn svg { width: 18px; height: 18px; flex: none; }

/* ---------- cartões ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.card.flat { box-shadow: none; }

.chip {
  display: inline-flex; align-items: center; gap: .35em; padding: .18em .7em; border-radius: 999px;
  background: var(--surface-2); color: var(--ink-2); font-size: .78rem; font-weight: 600; letter-spacing: .01em;
}
.chip.ok { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.chip.wait { background: color-mix(in srgb, var(--warn) 14%, transparent); color: var(--warn); }
.chip.warm { background: var(--warm-soft); color: var(--warm); }
.chip.novo { background: color-mix(in srgb, var(--p-verde) 16%, transparent); color: #227a40; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- "proteína": o ícone orgânico dos programas ----------
 * <span class="prot" style="--c:#3fb3d8"><svg>…</svg></span> */
.prot {
  --c: var(--p-ciano);
  display: inline-grid; place-items: center; width: 44px; height: 44px; flex: none;
  color: #fff;
  background: radial-gradient(120% 120% at 30% 25%, color-mix(in srgb, var(--c) 55%, #fff) 0%, var(--c) 45%, color-mix(in srgb, var(--c) 70%, #000) 100%);
  border-radius: 46% 54% 52% 48% / 58% 44% 56% 42%;
  box-shadow: inset 0 -3px 6px rgba(0,0,0,.18), 0 2px 6px -2px color-mix(in srgb, var(--c) 60%, transparent);
}
.prot svg { width: 60%; height: 60%; }
.prot.lg { width: 64px; height: 64px; }

/* ---------- bicamada: faixa decorativa ----------
 * fundo em SVG inline (cabeças laranja + caudas onduladas), sem arquivos extras */
.bicamada {
  height: 14px; width: 100%; display: block;
  background-repeat: repeat-x; background-size: 28px 14px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='28' height='14' viewBox='0 0 28 14'><path d='M7 3.6c1.2 1.6 1.2 3.2 0 4.8s-1.2 3.2 0 4.8M21 3.6c-1.2 1.6-1.2 3.2 0 4.8s1.2 3.2 0 4.8' fill='none' stroke='%23e7b43c' stroke-width='1.3' stroke-linecap='round'/><circle cx='7' cy='2.6' r='2.3' fill='%23f0701f'/><circle cx='21' cy='2.6' r='2.3' fill='%23f0701f'/><circle cx='7' cy='11.6' r='2.3' fill='%23f0701f'/><circle cx='21' cy='11.6' r='2.3' fill='%23f0701f'/></svg>");
  opacity: .85;
}
.bicamada.fina { height: 8px; background-size: 16px 8px; }

/* ---------- borda rasgada (encarte) ---------- */
.rasgo { position: relative; }
.rasgo::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -10px; height: 12px;
  background: inherit;
  clip-path: polygon(0 0, 3% 60%, 6% 20%, 9% 80%, 13% 30%, 17% 90%, 21% 40%, 25% 70%, 29% 10%, 33% 80%, 37% 30%, 41% 100%, 45% 40%, 49% 70%, 53% 20%, 57% 90%, 61% 30%, 65% 60%, 69% 10%, 73% 80%, 77% 40%, 81% 90%, 85% 20%, 89% 70%, 93% 30%, 97% 80%, 100% 0);
}

/* ---------- diálogos ---------- */
dialog {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 0;
  background: var(--surface); color: var(--ink); box-shadow: var(--shadow-lg);
  max-width: min(760px, calc(100vw - 32px)); max-height: calc(100vh - 48px);
}
dialog::backdrop { background: rgba(18, 30, 48, .55); backdrop-filter: blur(3px); }
.dialog-body { padding: 20px 26px 26px; overflow: auto; max-height: calc(100vh - 150px); }
.dialog-head { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 16px 14px 26px; border-bottom: 1px solid var(--line); }
.dialog-head h2 { margin: 0; font-size: 1.2rem; }

/* ---------- texto corrido ---------- */
.prose h3 { font-size: 1.02rem; margin-top: 1.3em; color: var(--marinho-2); }
:root[data-theme="dark"] .prose h3 { color: var(--accent); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .prose h3 { color: var(--accent); } }
.prose ol, .prose ul { padding-left: 1.3em; }
.prose li { margin-bottom: .3em; }
.prose figure { margin: 1em 0; }
.prose figcaption { font-size: .85rem; color: var(--ink-3); }
.prose img { border-radius: var(--radius-sm); }
.prose table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.prose th, .prose td { text-align: left; padding: .4em .6em; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { color: var(--ink-2); font-weight: 600; }
.prose kbd { font-family: var(--mono); font-size: .85em; padding: .1em .4em; border: 1px solid var(--line-2); border-bottom-width: 2px; border-radius: 5px; background: var(--surface-2); }
.nota-atualizacao {
  border-left: 4px solid var(--p-verde); background: color-mix(in srgb, var(--p-verde) 8%, transparent);
  padding: 10px 14px; border-radius: 0 var(--radius-xs) var(--radius-xs) 0; font-size: .92rem; margin: 1em 0;
}
.nota-atualizacao b:first-child { color: #227a40; }

/* seletor de idioma (PT | EN | ES) */
.idiomas { display: inline-flex; align-items: center; gap: 2px; padding: 2px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); flex: none; }
.idiomas a { font: 700 .72rem var(--font); letter-spacing: .04em; color: var(--ink-3); text-decoration: none; padding: 4px 7px; border-radius: 999px; line-height: 1; }
.idiomas a:hover { color: var(--ink); background: var(--surface-2); }
.idiomas a[aria-current="true"] { background: var(--marinho); color: #fff; }
.idiomas.na-barra { margin-left: 4px; }
@media (max-width: 640px) {
  .idiomas a { padding: 4px 5px; font-size: .68rem; }
  .idiomas.na-barra:not(.aberto) a:not([aria-current]) { display: none; }
  .idiomas.na-barra a[aria-current="true"]::after { content: " ▾"; font-size: .9em; }
  .idiomas.na-barra.aberto a[aria-current="true"]::after { content: ""; }
}