/* ---------------------------------------------------------------
   David Peña — hoja de estilos
   Todo en un solo archivo, sin frameworks ni build step.

   Paleta: verde de marca de ComunidadFeliz.
   Regla del design system: #4CBF8C se usa como RELLENO (botones,
   bordes, acentos). Para TEXTO en verde sobre blanco el único valor
   accesible en WCAG es #00A27F — por eso hay dos tokens distintos.
   --------------------------------------------------------------- */

:root {
  --bg:           #fafafa;
  --bg-alt:       #f4f4f4;
  --ink:          #232942;
  --ink-soft:     #4c516d;
  --line:         #cccccc;

  --accent:       #4cbf8c;  /* relleno: botones, bordes, subrayados */
  --accent-text:  #00a27f;  /* texto verde accesible sobre claro */
  --accent-hover: #50d6a5;
  --on-accent:    #fafafa;  /* texto sobre relleno verde */

  --card:         #ffffff;
  --shadow:       0 1px 2px rgba(35,41,66,.06), 0 8px 24px rgba(35,41,66,.06);
  --maxw:         44rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:          #1d1d28;
    --bg-alt:      #272733;
    --ink:         #fafafa;
    --ink-soft:    #a9acb9;
    --line:        #3e3e51;

    /* sobre fondo oscuro el verde claro es el que rinde en contraste */
    --accent:      #4cbf8c;
    --accent-text: #50d6a5;

    --card:        #272733;
    --shadow:      0 1px 2px rgba(0,0,28,.4), 0 8px 24px rgba(0,0,28,.3);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 1rem; top: 1rem;
  background: var(--accent); color: var(--on-accent);
  padding: .5rem 1rem; border-radius: 6px; z-index: 10;
}

/* --- Barra superior --- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding: .9rem clamp(1rem, 5vw, 3rem);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: .02em;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(.75rem, 3vw, 1.6rem);
}

.topbar nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: .9rem;
  white-space: nowrap;
}
.topbar nav a:hover { color: var(--accent-text); }

/* --- Hero --- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3.5rem, 12vw, 7rem) clamp(1.25rem, 5vw, 2rem) clamp(2rem, 6vw, 3.5rem);
}

.eyebrow {
  margin: 0 0 .75rem;
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-text);
}

h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  font-size: clamp(2.75rem, 11vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -.02em;
  margin: 0 0 1.25rem;
}

.lede {
  font-size: clamp(1.05rem, 2.6vw, 1.2rem);
  color: var(--ink-soft);
  margin: 0 0 2rem;
  max-width: 34rem;
}
.lede strong { color: var(--ink); font-weight: 600; }

.cta { display: flex; flex-wrap: wrap; gap: .75rem; }

.btn {
  display: inline-block;
  padding: .65rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font-size: .95rem;
  font-weight: 500;
  transition: transform .15s ease, border-color .15s ease, background-color .15s ease;
}
.btn:hover { transform: translateY(-1px); border-color: var(--accent); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* --- Bloques --- */
.block {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.5rem, 8vw, 4rem) clamp(1.25rem, 5vw, 2rem);
  border-top: 1px solid var(--line);
}

.block-light {
  background: var(--bg-alt);
  max-width: none;
  border-top: 1px solid var(--line);
}
.block-light > * { max-width: var(--maxw); margin-inline: auto; }

h2 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 600;
  font-size: clamp(1.6rem, 5vw, 2rem);
  letter-spacing: -.01em;
  margin: 0 0 1.5rem;
}

.prose p { margin: 0 0 1.1rem; color: var(--ink-soft); }
.prose p:last-child { margin-bottom: 0; }
.prose em { color: var(--ink); font-style: italic; }

/* --- Línea de tiempo --- */
.timeline { list-style: none; margin: 0; padding: 0; }

.timeline li {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1.25rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}
.timeline li:last-child { border-bottom: 0; }

.year {
  font-variant-numeric: tabular-nums;
  font-size: .85rem;
  font-weight: 600;
  color: var(--accent-text);
  padding-top: .25rem;
}

.timeline h3 { margin: 0 0 .3rem; font-size: 1rem; font-weight: 600; }
.timeline p  { margin: 0; color: var(--ink-soft); font-size: .95rem; }

/* --- Tarjetas de ideas --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: 14px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 .5rem; font-size: 1rem; font-weight: 600; }
.card p  { margin: 0; color: var(--ink-soft); font-size: .93rem; }

/* --- Contacto --- */
.links { display: flex; flex-wrap: wrap; gap: 1.5rem; margin-top: 1.5rem; }
.links a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
  font-weight: 500;
}
.links a:hover { color: var(--accent-text); }

/* --- Pie --- */
footer {
  border-top: 1px solid var(--line);
  padding: 2rem clamp(1.25rem, 5vw, 2rem);
  text-align: center;
}
footer p { margin: 0; color: var(--ink-soft); font-size: .85rem; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}