/* ============================================================================
   theme.css — tokens, base, cabecera y pie
   Paleta: gris neutro · rojo (#ef4444) · acentos por tipo
   ========================================================================== */

:root {
  --font-display: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* superficies (oscuro) */
  --bg: #1a1a1a;
  --bg-1: #242424;
  --bg-2: #161616;
  --bg-3: #2e2e2e;
  --text: #ededed;
  --text-dim: #a1a1aa;
  --text-faint: #71717a;
  --border: rgba(255, 255, 255, .09);
  --border-strong: rgba(255, 255, 255, .16);

  /* acentos */
  --red: #ef4444;
  --red-bright: #f87171;
  --red-bg: rgba(239, 68, 68, .12);
  --red-glow: rgba(239, 68, 68, .28);
  --green: #4ade80;
  --blue: #60a5fa;
  --purple: #a78bfa;
  --amber: #fbbf24;

  /* color por tipo de contenido */
  --t-writeups: var(--green);
  --t-guides: var(--blue);
  --t-tools: var(--purple);

  /* callouts */
  --c-note: var(--blue); --c-info: #38bdf8; --c-tip: var(--green); --c-success: var(--green);
  --c-example: var(--purple); --c-question: var(--amber); --c-warning: var(--amber);
  --c-danger: var(--red); --c-quote: var(--text-faint);

  /* tokens de código */
  --tok-kw: #f472b6; --tok-str: var(--green); --tok-com: #6b7280; --tok-num: var(--amber); --tok-flag: var(--blue);

  --radius: 12px; --radius-sm: 8px; --maxw: 1180px; --header-h: 60px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

[data-theme="light"] {
  --bg: #f4f4f3; --bg-1: #ffffff; --bg-2: #f0efed; --bg-3: #e7e6e3;
  --text: #18181b; --text-dim: #52525b; --text-faint: #8a8a92;
  --border: rgba(0, 0, 0, .10); --border-strong: rgba(0, 0, 0, .18);
  --red: #dc2626; --red-bright: #ef4444; --red-bg: rgba(220, 38, 38, .08); --red-glow: rgba(220, 38, 38, .2);
  --green: #16a34a; --blue: #2563eb; --purple: #7c3aed; --amber: #b45309;
  --c-info: #0284c7;
  --tok-kw: #be185d; --tok-str: #15803d; --tok-com: #9ca3af; --tok-num: #b45309; --tok-flag: #2563eb;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 20px); }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font-body); font-size: 16px; line-height: 1.65;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  transition: background .3s var(--ease), color .3s var(--ease);
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- cabecera ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50; height: var(--header-h); display: flex; align-items: center;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(140%); border-bottom: 1px solid var(--border);
}
.site-header .wrap { display: flex; align-items: center; gap: 8px; }
.brand { display: flex; align-items: center; gap: 7px; font-family: var(--font-mono); font-size: .95rem; margin-right: 18px; }
.brand .brand__dollar { color: var(--green); font-weight: 700; }
.brand b { color: var(--text); font-weight: 700; }
.brand .brand__cursor { width: 8px; height: 1.05em; background: var(--red); display: inline-block; transform: translateY(2px); animation: blink 1.1s steps(1) infinite; }

.nav { display: flex; align-items: center; gap: 2px; }
.nav a { font-family: var(--font-mono); font-size: .82rem; color: var(--text-dim); padding: 6px 11px; border-radius: var(--radius-sm); transition: color .2s, background .2s; }
.nav a:hover { color: var(--text); background: var(--bg-1); }
.nav a.is-active { color: var(--red); background: var(--red-bg); }

.header-tools { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.header-search { display: flex; align-items: center; gap: 8px; background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 0 11px; width: 190px; }
.header-search:focus-within { border-color: var(--red); box-shadow: 0 0 0 3px var(--red-bg); }
.header-search svg { width: 15px; height: 15px; color: var(--text-faint); flex: none; }
.header-search input { flex: 1; min-width: 0; background: none; border: none; outline: none; color: var(--text); font-family: var(--font-mono); font-size: .82rem; padding: 8px 0; }
.header-search input::placeholder { color: var(--text-faint); }

.icon-btn { display: grid; place-items: center; height: 34px; min-width: 34px; padding: 0 8px; border-radius: var(--radius-sm); background: var(--bg-1); border: 1px solid var(--border); color: var(--text-dim); font-family: var(--font-mono); font-size: .76rem; transition: color .2s, border-color .2s, transform .2s var(--ease); }
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); transform: translateY(-1px); }
.icon-btn svg { width: 17px; height: 17px; }
[data-theme="dark"] .ico-moon { display: none; }
[data-theme="light"] .ico-sun { display: none; }
.nav-toggle { display: none; }

/* ---------- pie (multi-columna) ---------- */
.site-footer { margin-top: 90px; border-top: 1px solid var(--border); background: var(--bg-2); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; padding: 46px 0 34px; }
.footer-brand__name { font-family: var(--font-mono); font-size: 1.05rem; font-weight: 700; }
.footer-brand__name .brand__dollar { color: var(--green); }
.footer-brand__desc { color: var(--text-dim); font-size: .9rem; max-width: 34ch; margin: 12px 0 0; }
.footer-col h4 { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .12em; text-transform: lowercase; color: var(--text-faint); font-weight: 500; margin: 0 0 14px; }
.footer-col a { display: block; color: var(--text-dim); font-size: .9rem; padding: 4px 0; transition: color .2s; }
.footer-col a:hover { color: var(--red); }
.footer-col a .ext { color: var(--text-faint); font-size: .8em; }
.footer-bottom { border-top: 1px solid var(--border); padding: 16px 0; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-family: var(--font-mono); font-size: .76rem; color: var(--text-faint); }

/* ---------- encabezados base ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; letter-spacing: -.01em; }
.eyebrow { font-family: var(--font-mono); font-size: .76rem; letter-spacing: .1em; color: var(--text-faint); }

/* ---------- prompt de terminal (encabezado de listados) ---------- */
.term-prompt { display: inline-flex; align-items: center; gap: 0; font-family: var(--font-mono); font-size: .82rem; padding: 7px 13px; background: var(--bg-1); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-faint); }
.term-prompt .u { color: var(--red); } .term-prompt .p { color: var(--text-dim); } .term-prompt .c { color: var(--text-faint); }

/* ---------- botón de retroceder (estilo terminal, sin caja) ---------- */
.back-btn { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: .86rem; color: var(--text-dim); padding: 6px 2px; background: none; border: none; transition: color .2s, transform .2s var(--ease); }
.back-btn:hover { color: var(--red); transform: translateX(-3px); }
.back-btn .arrow { display: inline-flex; color: var(--red); }
.back-btn .arrow svg { width: 16px; height: 16px; }
.back-btn__kw { color: var(--green); }
.back-btn__pth { color: var(--text-dim); }
.back-btn:hover .back-btn__pth { color: var(--red); }

/* móvil */
@media (max-width: 820px) {
  .header-search { display: none; }
}
@media (max-width: 720px) {
  .nav { position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; align-items: stretch; background: var(--bg-1); border-bottom: 1px solid var(--border); padding: 10px; gap: 2px; transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .25s var(--ease); z-index: 49; }
  .nav.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav a { padding: 12px; }
  .nav-toggle { display: grid; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .wrap { padding: 0 18px; }
}