/* ============================================================
   base.css — estructura compartida de las plantillas
   Cada variante (clasico, minimalista, ...) solo redefine tokens
   y algunos componentes puntuales.
   ============================================================ */

:root {
  --font-display: system-ui, sans-serif;
  --font-body: system-ui, sans-serif;
  --bg: #fff;
  --surface: #f6f6f4;
  --text: #1a1a1a;
  --text-muted: #5c5c5c;
  --accent: #2563eb;
  --accent-contrast: #fff;
  --border: #e4e4e0;
  --radius: 8px;
  --max-w: 1080px;
  --section-pad: 4.5rem;
  /* foto placeholder del hero; cada variante puede cambiarla */
  --photo-img: url('https://picsum.photos/seed/professional/900/1120');
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-top: 3rem; /* espacio para la demo-bar */
}

h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); margin: .3em 0 .4em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 0 0 1.2rem; }
h3 { font-size: 1.15rem; margin: 0 0 .5rem; }
p  { margin: 0 0 1rem; }
a  { color: var(--accent); }

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

/* ---------- demo bar (no pertenece a la plantilla) ---------- */
.demo-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; gap: .75rem;
  padding: .4rem 1rem;
  background: #111; color: #eee;
  font: 0.8rem/1 system-ui, sans-serif;
}
.demo-bar select { font: inherit; padding: .25rem .4rem; }

/* ---------- entrada orquestada (una sola vez, no por sección) ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}
.hero-text > *, .hero-photo {
  animation: rise .7s cubic-bezier(.22,.7,.3,1) both;
}
.hero-text > *:nth-child(2) { animation-delay: .08s; }
.hero-text > *:nth-child(3) { animation-delay: .16s; }
.hero-text > *:nth-child(4) { animation-delay: .24s; }
.hero-photo { animation-delay: .3s; }

/* ---------- header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: .9rem; padding-bottom: .9rem;
}
.brand { font-family: var(--font-display); font-weight: 700; }
.nav { display: flex; gap: 1.4rem; }
.nav a {
  text-decoration: none; color: var(--text); font-size: .95rem;
  position: relative; padding-bottom: 2px;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 100%; height: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.nav a:hover { color: var(--accent); }
.nav a:hover::after { transform: scaleX(1); }

/* ---------- hero ---------- */
.hero { padding: var(--section-pad) 0; }
.hero-inner {
  display: grid; grid-template-columns: 1.4fr 1fr;
  gap: 3rem; align-items: center;
}
.kicker {
  font-size: .85rem; font-weight: 600;
  color: var(--accent); margin: 0 0 .4rem;
}
.lede { font-size: 1.15rem; color: var(--text-muted); }
.hero-photo {
  aspect-ratio: 4/5; border-radius: var(--radius);
  background: var(--photo-img) center/cover no-repeat, var(--surface);
  border: 1px solid var(--border);
}
.hero-actions { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.6rem; }

/* ---------- botones ---------- */
.btn {
  display: inline-block; padding: .75rem 1.5rem;
  border-radius: var(--radius); text-decoration: none;
  font-weight: 600; font-size: .95rem;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease,
              background .2s ease, color .2s ease, border-color .2s ease;
}
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-ghost   { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- secciones ---------- */
.section { padding: var(--section-pad) 0; }
.section-alt { background: var(--surface); }
.prose p { max-width: 65ch; }
.credentials { padding-left: 1.2rem; color: var(--text-muted); }
.credentials li { margin-bottom: .35rem; }

/* ---------- cards ---------- */
.cards {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(20,20,20,.09);
  border-color: var(--accent);
}
.card p:last-child { margin-bottom: 0; }
.post-meta { font-size: .8rem; color: var(--text-muted); margin-bottom: .4rem; }
.read-more { font-weight: 600; text-decoration: none; font-size: .9rem; }

/* ---------- timeline ---------- */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li {
  padding: 0 0 1.8rem 1.5rem;
  border-left: 2px solid var(--border);
  position: relative;
}
.timeline li::before {
  content: ""; position: absolute; left: -7px; top: .35rem;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent);
}
.timeline li:last-child { border-left-color: transparent; }
.tl-date { display: block; font-size: .8rem; color: var(--text-muted); margin-bottom: .15rem; }

/* ---------- contacto ---------- */
.contact-inner { max-width: 620px; }
.contact-actions { display: flex; gap: .8rem; flex-wrap: wrap; margin: 1.4rem 0; }
.contact-note { font-size: .85rem; color: var(--text-muted); }

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0; font-size: .9rem; color: var(--text-muted);
}
.fineprint { font-size: .78rem; }

/* ---------- accesibilidad ---------- */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-photo { order: -1; max-width: 320px; }
  .cards { grid-template-columns: 1fr; }
  .nav { display: none; } /* en la variante real iría un menú hamburguesa */
}