/* ============================================================
   Studio Kapa — base.css
   Variables de marca, reset y utilidades tipográficas/layout.
   Ver BRAND.md para la documentación completa de cada decisión.
   ============================================================ */

:root {
  /* Color */
  --color-ink: #141414;
  --color-ink-soft: #3A3733;
  --color-ink-muted: #6E685F;
  --color-cream: #F2EEE4;
  --color-cream-soft: #EAE4D6;
  --color-surface: #FBF9F3;
  --color-border: #DDD5C4;
  --color-gold: #A9832E;
  --color-gold-soft: #F1E6CB;
  --color-success: #3F6B4C;
  --color-danger: #8C3B2E;

  /* Tipografía */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: clamp(1.75rem, 1.4rem + 1.6vw, 2.25rem);
  --text-4xl: clamp(2.25rem, 1.7rem + 2.6vw, 3.25rem);
  --text-5xl: clamp(2.75rem, 1.9rem + 4vw, 4.25rem);

  /* Espaciado (base 4px) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;

  /* Bordes / radios / sombras */
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 20px;
  --radius-full: 999px;

  --shadow-sm: 0 1px 2px rgba(20,20,20,.06);
  --shadow-md: 0 8px 24px rgba(20,20,20,.08);
  --shadow-lg: 0 20px 48px rgba(20,20,20,.12);

  /* Layout */
  --container-max: 1200px;
  --container-pad: var(--space-4);

  /* Breakpoints (solo como referencia; usar en media queries directamente) */
}

@media (min-width: 768px) {
  :root { --container-pad: var(--space-6); }
}

/* ---- Reset mínimo ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul[class], ol[class] { padding: 0; list-style: none; }
img, picture, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
button { background: none; border: 0; cursor: pointer; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-ink-soft);
  background: var(--color-cream);
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-ink);
  line-height: 1.2;
  font-weight: 600;
}

h1 { font-size: var(--text-5xl); letter-spacing: -0.02em; }
h2 { font-size: var(--text-3xl); letter-spacing: -0.015em; }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p { max-width: 68ch; }
p.lead { font-size: var(--text-lg); color: var(--color-ink-soft); }

a.link {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-color: var(--color-border);
  text-underline-offset: 3px;
  transition: text-decoration-color 160ms ease, color 160ms ease;
}
a.link:hover { color: var(--color-gold); text-decoration-color: var(--color-gold); }

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

/* ---- Layout utilities ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section { padding-block: var(--space-10); }
@media (min-width: 1024px) {
  .section { padding-block: var(--space-16); }
}
.section--tight { padding-block: var(--space-8); }
.section--alt { background: var(--color-cream-soft); }
.section--ink { background: var(--color-ink); color: var(--color-cream); }
.section--ink h2, .section--ink h3 { color: var(--color-cream); }
.section--ink p { color: rgba(242,238,228,.78); }

.section__head {
  max-width: 640px;
  margin-bottom: var(--space-8);
}
.section__head--center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-3);
}

.grid { display: grid; gap: var(--space-6); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  background: var(--color-ink);
  color: var(--color-cream);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 100;
  transition: top 160ms ease;
}
.skip-link:focus { top: var(--space-4); }