/* Front North — sistema de diseño */

:root {
  --surface: #E8E3D9;
  --surface-raised: #FFFFFF;
  --ink: #1C1C1A;
  --ink-muted: #4A4943;
  --line: #C9C3B6;
  --inverse-surface: #1a1916;
  --inverse-ink: #f0ece3;
  --inverse-ink-muted: #A8A398;
  --accent: #9A3B1E;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  --measure: 560px;
  --rule: 1px;

  /* TODO: posible color ocre #B98B3C (decide Pau) - no aplicado */
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #1a1916;
    --surface-raised: #2A2823;
    --ink: #f0ece3;
    --ink-muted: #A8A398;
    --line: #4A4943;
    --inverse-surface: #E8E3D9;
    --inverse-ink: #1C1C1A;
    --inverse-ink-muted: #4A4943;
    --accent: #E58A66;
  }
}

@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../fonts/dm-sans-variable.woff2") format("woff2");
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  font-weight: 400;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

::selection { background: var(--ink); color: var(--surface); }

/* Foco visible, sin azul */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

/* Tipografía */
.text-display {
  font-size: clamp(40px, 9vw, 72px);
  line-height: 1.02;
  font-weight: 700;
  letter-spacing: -0.035em;
  margin: 0;
}

.text-title {
  font-size: 32px;
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0;
}

@media (min-width: 640px) {
  .text-title { font-size: 44px; }
}

.text-subtitle {
  font-size: 22px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}

.text-body-lg { font-size: 18px; line-height: 1.45; margin: 0; }
.text-body { font-size: 16px; line-height: 1.5; margin: 0; }
.text-small { font-size: 14px; line-height: 1.4; margin: 0; }
.text-caption { font-size: 12px; line-height: 1.4; margin: 0; }

.label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin: 0 0 var(--space-4);
}

.ink-muted { color: var(--ink-muted); }
.measure { max-width: var(--measure); }

/* Layout */
.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

@media (min-width: 640px) {
  .wrap { padding-left: var(--space-7); padding-right: var(--space-7); }
}

.section { padding-top: var(--space-9); padding-bottom: var(--space-9); }

.section-raised { background: var(--surface-raised); }

.section-top-rule { border-top: var(--rule) solid var(--ink); }

#metodologia { padding-top: var(--space-10); }

/* Cifra decorativa de sección */
.section-num {
  display: block;
  font-size: clamp(64px, 10vw, 120px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ink);
  margin-bottom: var(--space-5);
}

/* Bloque de llamada */
.callout {
  background: var(--inverse-surface);
  color: var(--inverse-ink);
  padding: var(--space-5);
  margin-top: var(--space-5);
}

@media (min-width: 640px) {
  .callout { padding: var(--space-7); }
}

.callout .ink-muted { color: var(--inverse-ink-muted); }

.section-dark {
  position: relative;
  background: var(--inverse-surface);
  color: var(--inverse-ink);
}

.section-dark .ink-muted { color: var(--inverse-ink-muted); }

.rule { border: none; border-top: var(--rule) solid var(--line); margin: 0; }

/* Cabecera */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2;
  /* la cabecera va sobre el hero (inverse-surface); si el hero deja de estar debajo, cambiar */
  color: var(--inverse-ink);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.site-header .logo { width: 160px; min-width: 96px; height: auto; }

/* Logo: variante para fondos invertidos (hero y cierre) */
.logo-oninverse .logo-cream { display: block; }
.logo-oninverse .logo-ink { display: none; }

/* Logo: variante para fondos normales (surface) */
.logo-onsurface img:first-child { display: block; }
.logo-onsurface img:last-child { display: none; }

@media (prefers-color-scheme: dark) {
  .logo-oninverse .logo-cream { display: none; }
  .logo-oninverse .logo-ink { display: block; }

  .logo-onsurface img:first-child { display: none; }
  .logo-onsurface img:last-child { display: block; }
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border: 0;
  font-size: 14px;
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

/* Botones */
.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  padding: var(--space-4) var(--space-6);
  border: var(--rule) solid currentColor;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.btn-solid {
  background: var(--ink);
  color: var(--surface);
  border-color: var(--ink);
}

.section-dark .btn-solid {
  background: var(--inverse-ink);
  color: var(--inverse-surface);
  border-color: var(--inverse-ink);
}

.btn-solid:hover {
  background: transparent;
  color: var(--inverse-ink);
}

.btn:active { transform: translateY(1px); }

.btn:focus-visible {
  outline: 2px solid var(--inverse-ink);
  outline-offset: 3px;
}

.nav-link:hover { opacity: .7; }

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

.hero > .wrap {
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.hero-content {
  position: relative;
  padding-top: calc(var(--space-8) + 88px);
  padding-bottom: var(--space-9);
  max-width: 760px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.hero-support { margin-top: var(--space-5); }
.hero-cta { margin-top: var(--space-7); }

/* Motivo de picos */
.peaks {
  display: none;
  position: absolute;
  color: currentColor;
  pointer-events: none;
}

/* Solo se muestra cuando hay espacio de sobra a la derecha del texto, sin solaparlo */
@media (min-width: 1180px) {
  .peaks { display: block; }

  .peaks-hero {
    bottom: var(--space-7);
    right: var(--space-7);
    width: 240px;
  }

  .peaks-close {
    bottom: var(--space-6);
    right: var(--space-7);
    width: 140px;
  }
}

/* Franja de picos a sangre (borde del hero y del cierre) */
.peaks-edge {
  position: absolute;
  left: 0;
  right: 0;
  width: 100%;
  height: 24px;
  color: currentColor;
  pointer-events: none;
}

.peaks-edge-hero { bottom: 0; }
.peaks-edge-close { top: 0; }

/* Listas numeradas (qué hacemos / procedimiento) */
.numbered-list {
  display: grid;
  gap: var(--space-7);
  margin-top: var(--space-7);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .numbered-list { grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
}

.numbered-item {
  border-top: var(--rule) solid var(--ink);
  padding-top: var(--space-5);
}

.numbered-item .text-subtitle { margin-bottom: var(--space-2); }

/* Procedimiento: lista vertical con filetes */
.step-list { margin-top: var(--space-7); }

.step-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-5);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  border-top: var(--rule) solid var(--line);
}

.step-item:last-child { border-bottom: var(--rule) solid var(--line); }

.step-item .num {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
}

/* Metodología: lista de principios */
.principle-list {
  margin-top: var(--space-6);
  padding: 0;
  list-style: none;
}

.principle-list li {
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
  border-top: var(--rule) solid var(--line);
}

.principle-list li:last-child { border-bottom: var(--rule) solid var(--line); }

/* Cierre */
.close-content { padding-top: var(--space-8); padding-bottom: var(--space-9); position: relative; }
.close-cta { margin-top: var(--space-6); display: flex; flex-wrap: wrap; gap: var(--space-5); align-items: center; }

/* Footer */
.site-footer {
  border-top: var(--rule) solid var(--line);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.site-footer .logo { width: 120px; min-width: 96px; height: auto; }

/* Aparición al hacer scroll (solo con JS y sin preferencia de movimiento reducido) */
@media (prefers-reduced-motion: no-preference) {
  .js .reveal {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity .5s ease, transform .5s ease;
  }

  .js .reveal.is-in {
    opacity: 1;
    transform: none;
  }

  html { scroll-behavior: smooth; }

  .btn, .nav-link {
    transition: background-color .15s ease, color .15s ease, opacity .15s ease;
  }
}

@media print {
  .reveal { opacity: 1; transform: none; }
}