/* ===========================================================
   CASOS IMPERFECTOS — main.css
   Reset, variables, tipografía, layout base, navegación, footer,
   botones y utilidades compartidas por todas las páginas públicas.
   =========================================================== */

/* ---------- Variables ---------- */
:root {
  --color-bg: #0d0d0d;
  --color-bg-alt: #161615;
  --color-bg-card: #18171589;
  --color-paper: #1c1a17;
  --color-ivory: #e9e6dd;
  --color-ivory-dim: #b9b6ac;
  --color-red: #7a1420;
  --color-red-bright: #9c1c29;
  --color-amber: #c9a227;
  --color-border: #2c2a26;

  --font-display: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Lora', Georgia, 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --container-max: 1180px;
  --radius: 2px;
  --transition: 0.35s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-ivory);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(122, 20, 32, 0.05), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(201, 162, 39, 0.04), transparent 45%);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  line-height: 1.2;
  margin: 0 0 0.6em;
  color: var(--color-ivory);
}
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* Foco visible para navegación por teclado */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-amber);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-red);
  color: var(--color-ivory);
  padding: 0.75em 1.25em;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.eyebrow {
  font-family: var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--color-amber);
  margin-bottom: 0.9em;
  display: inline-block;
}

.section {
  padding: 5.5rem 0;
  border-top: 1px solid var(--color-border);
}
.section--tight { padding: 3.5rem 0; }
.section--alt { background-color: var(--color-bg-alt); }

.section-head {
  max-width: 720px;
  margin-bottom: 2.5rem;
}
.section-head p {
  color: var(--color-ivory-dim);
  font-size: 1.05rem;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  padding: 0.95em 1.8em;
  border: 1px solid var(--color-ivory);
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-ivory);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}
.btn:hover, .btn:focus-visible {
  background-color: var(--color-ivory);
  color: var(--color-bg);
}
.btn--primary {
  background-color: var(--color-red);
  border-color: var(--color-red);
  color: var(--color-ivory);
}
.btn--primary:hover, .btn--primary:focus-visible {
  background-color: var(--color-red-bright);
  border-color: var(--color-red-bright);
  color: var(--color-ivory);
}
.btn--ghost {
  border-color: var(--color-border);
  color: var(--color-ivory-dim);
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  border-color: var(--color-ivory);
  color: var(--color-bg);
}

/* ---------- Header / Navegación ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(13, 13, 13, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 0;
}
.nav__brand {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 1.05rem;
  color: var(--color-ivory);
  display: flex;
  align-items: center;
  gap: 0.5em;
}
.nav__brand span.mark {
  color: var(--color-red-bright);
}
.nav__toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-ivory);
  padding: 0.5em 0.7em;
  font-family: var(--font-mono);
}
.nav__list {
  display: flex;
  gap: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.nav__list a {
  padding: 0.3em 0;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
  color: var(--color-ivory-dim);
}
.nav__list a:hover,
.nav__list a:focus-visible,
.nav__list a[aria-current="page"] {
  color: var(--color-ivory);
  border-bottom-color: var(--color-amber);
}

@media (max-width: 780px) {
  .nav__toggle { display: inline-flex; }
  .nav__list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem;
    gap: 1.2rem;
    display: none;
  }
  .nav__list.is-open { display: flex; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 0 2rem;
  background-color: var(--color-bg-alt);
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}
.footer__brand {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ivory);
  max-width: 340px;
}
.footer__brand p {
  font-family: var(--font-body);
  text-transform: none;
  letter-spacing: normal;
  color: var(--color-ivory-dim);
  font-size: 0.92rem;
  margin-top: 0.6em;
}
.footer__nav {
  display: flex;
  flex-direction: column;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.footer__nav a { color: var(--color-ivory-dim); }
.footer__nav a:hover, .footer__nav a:focus-visible { color: var(--color-amber); }
.footer__legal {
  width: 100%;
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #7a7871;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em 1.2em;
  justify-content: space-between;
}

/* ---------- Sello decorativo ---------- */
.stamp {
  position: absolute;
  border: 3px solid var(--color-red);
  color: var(--color-red);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  padding: 0.4em 0.9em;
  border-radius: 999px;
  transform: rotate(-8deg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.stamp.is-visible {
  opacity: 0.85;
  transform: rotate(-8deg) scale(1);
}

/* ---------- Utilidades de aparición al hacer scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal, .stamp {
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  html { scroll-behavior: auto; }
}

/* ---------- Tarjeta tipo carpeta ---------- */
.folder-card {
  position: relative;
  background-color: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
}
.folder-card::before {
  content: "";
  position: absolute;
  top: -10px;
  left: 1.6rem;
  width: 90px;
  height: 12px;
  background-color: var(--color-paper);
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: 4px 4px 0 0;
}

/* ---------- 404 ---------- */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem;
}
.error-page .eyebrow { display: block; }
.error-page h1 { font-size: clamp(2rem, 6vw, 3.4rem); }

@media (max-width: 600px) {
  .section { padding: 3.5rem 0; }
  body { font-size: 16px; }
}