/*
 * SIRUF — Estilos compartidos
 * Tikvah Tecnología Chile SpA
 * ─────────────────────────────────────────
 * Usar en todas las páginas:
 *   <link rel="stylesheet" href="/css/site.css">
 *
 * Variables de color por producto:
 *   --kira    : #7c3aed (morado)
 *   --pos     : #ea580c (naranja)
 *   --trueque : #059669 (verde)
 *   --dark    : #0f0716 (fondo oscuro)
 */

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: #0f172a;
  background: #f8fafc;
  line-height: 1.7;
}

/* ── Variables ── */
:root {
  --kira: #7c3aed;
  --kira-dark: #4c1d95;
  --kira-light: #ede9fe;
  --pos: #ea580c;
  --pos-dark: #7c2d12;
  --pos-light: #ffedd5;
  --trueque: #059669;
  --trueque-dark: #064e3b;
  --trueque-light: #d1fae5;
  --dark: #0f0716;
  --ink: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #f8fafc;
}

/* ── Nav ── */
.nav {
  background: var(--dark);
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-logo {
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-link { color: #94a3b8; text-decoration: none; font-size: .9rem; }
.nav-link:hover { color: #fff; }
.nav-cta {
  color: #fff;
  padding: 8px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: .9rem;
}
.nav-cta.kira    { background: var(--kira); }
.nav-cta.pos     { background: var(--pos); }
.nav-cta.trueque { background: var(--trueque); }

/* ── Hero ── */
.hero {
  padding: 80px 32px 64px;
  text-align: center;
  color: #fff;
}
.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,.15);
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.15;
  max-width: 780px;
  margin: 0 auto 20px;
}
.hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,.75);
  max-width: 560px;
  margin: 0 auto 32px;
}
.hero-meta { font-size: .85rem; color: rgba(255,255,255,.5); }

/* ── Contenedor ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 740px; margin: 0 auto; padding: 0 24px; }

/* ── Secciones ── */
.section { padding: 80px 0; }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  text-align: center;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 48px;
}

/* ── Grid de cards ── */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); gap: 24px; }

/* ── Card ── */
.card {
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 28px;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: 0 8px 32px rgba(0,0,0,.08); transform: translateY(-2px); }
.card-icon { font-size: 2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.1rem; font-weight: 800; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: .9rem; line-height: 1.6; }

/* ── Highlight box ── */
.highlight {
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
  margin: 32px 0;
  border-left-width: 4px;
  border-left-style: solid;
}
.highlight.kira    { background: var(--kira-light);    border-color: var(--kira); }
.highlight.pos     { background: var(--pos-light);     border-color: var(--pos); }
.highlight.trueque { background: var(--trueque-light); border-color: var(--trueque); }

/* ── CTA box ── */
.cta-box {
  background: var(--dark);
  color: #fff;
  padding: 48px 40px;
  border-radius: 20px;
  text-align: center;
  margin: 60px 0;
}
.cta-box h2, .cta-box h3 { color: #fff; margin-bottom: 12px; }
.cta-box p { color: #94a3b8; margin-bottom: 28px; }

/* ── Botones ── */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  transition: opacity .2s;
}
.btn:hover { opacity: .85; }
.btn-kira    { background: var(--kira);    color: #fff; }
.btn-pos     { background: var(--pos);     color: #fff; }
.btn-trueque { background: var(--trueque); color: #fff; }
.btn-outline { background: transparent; border: 2px solid #fff; color: #fff; }

/* ── Tabla comparativa ── */
.table { width: 100%; border-collapse: collapse; margin: 24px 0; border-radius: 12px; overflow: hidden; }
.table th { color: #fff; padding: 12px 16px; text-align: left; font-size: .9rem; }
.table td { padding: 12px 16px; border-bottom: 1px solid var(--border); font-size: .9rem; }
.table tr:last-child td { border-bottom: none; }
.table tr:nth-child(even) td { background: var(--bg); }
.table th.kira    { background: var(--kira); }
.table th.pos     { background: var(--pos); }
.table th.trueque { background: var(--trueque); }

/* ── Artículo de blog ── */
article h2 { font-size: 1.5rem; font-weight: 800; margin: 48px 0 16px; }
article h3 { font-size: 1.15rem; font-weight: 700; margin: 32px 0 12px; }
article p  { margin-bottom: 20px; color: #334155; }
article ul, article ol { padding-left: 24px; margin-bottom: 20px; }
article li { margin-bottom: 8px; color: #334155; }

/* ── Badge de tag ── */
.tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
}
.tag.kira    { background: var(--kira-light);    color: var(--kira-dark); }
.tag.pos     { background: var(--pos-light);     color: var(--pos-dark); }
.tag.trueque { background: var(--trueque-light); color: var(--trueque-dark); }

/* ── Footer ── */
.footer {
  background: var(--dark);
  color: #94a3b8;
  text-align: center;
  padding: 40px 24px;
  font-size: .85rem;
  margin-top: 80px;
}
.footer a { color: var(--kira); text-decoration: none; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .nav { padding: 0 16px; }
  .nav-links .nav-link { display: none; }
  .hero { padding: 60px 16px 48px; }
  .section { padding: 60px 0; }
  .cta-box { padding: 32px 20px; }
}