/* ==========================================================================
   Samuel Franco — Design System
   ========================================================================== */

:root {
  --obsidiana: #0A0A0A;
  --blanco: #FFFFFF;
  --dorado: #C8A44D;
  --dorado-suave: #E8D496;
  --azul: #3B82F6;
  --gris-texto: #4B5563;
  --gris-suave: #6B7280;
  --gris-borde: #E5E7EB;
  --gris-fondo: #F9FAFB;

  --bg: var(--blanco);
  --bg-alt: var(--gris-fondo);
  --text: var(--obsidiana);
  --text-muted: var(--gris-texto);
  --border: var(--gris-borde);
  --accent: var(--dorado);
  --accent-2: var(--azul);

  --container: 1200px;
  --container-narrow: 820px;
  --container-wide: 1400px;

  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  --shadow-sm: 0 1px 2px rgba(10,10,10,.04);
  --shadow-md: 0 8px 30px rgba(10,10,10,.06);
  --shadow-lg: 0 20px 60px rgba(10,10,10,.08);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Inter", serif;

  --fs-hero: clamp(2.4rem, 5.5vw, 4.6rem);
  --fs-h1: clamp(2rem, 4.5vw, 3.4rem);
  --fs-h2: clamp(1.6rem, 3vw, 2.4rem);
  --fs-h3: clamp(1.15rem, 1.8vw, 1.45rem);
  --fs-lead: clamp(1.05rem, 1.4vw, 1.25rem);
  --fs-body: 1rem;
  --fs-small: .875rem;

  --ease: cubic-bezier(.2,.7,.2,1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: var(--obsidiana);
    --bg-alt: #141414;
    --text: #F5F5F5;
    --text-muted: #A1A1AA;
    --border: #262626;
    --shadow-md: 0 8px 30px rgba(0,0,0,.4);
    --shadow-lg: 0 20px 60px rgba(0,0,0,.5);
  }
}

:root[data-theme="dark"] {
  --bg: var(--obsidiana);
  --bg-alt: #141414;
  --text: #F5F5F5;
  --text-muted: #A1A1AA;
  --border: #262626;
  --shadow-md: 0 8px 30px rgba(0,0,0,.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,.5);
}

/* Reset ligero */
*,*::before,*::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: opacity .2s var(--ease); }
a:hover { opacity: .75; }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }

/* Layout */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 1.5rem; }
.container.narrow { max-width: var(--container-narrow); }
.container.wide { max-width: var(--container-wide); }
.section { padding: clamp(4rem, 8vw, 7rem) 0; }
.section-tight { padding: clamp(3rem, 5vw, 4.5rem) 0; }
.section-alt { background: var(--bg-alt); }

/* Tipografía */
h1,h2,h3,h4 { font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; color: var(--text); }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); margin-bottom: 1.25rem; }
h3 { font-size: var(--fs-h3); margin-bottom: .75rem; }
p { color: var(--text-muted); }
p + p { margin-top: 1rem; }
.lead { font-size: var(--fs-lead); color: var(--text-muted); line-height: 1.6; }
.eyebrow {
  display: inline-block;
  font-size: .75rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1rem;
}
.gold { color: var(--accent); }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: 1rem 1.75rem;
  border-radius: 999px;
  font-weight: 600; font-size: 1rem;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--obsidiana); color: var(--blanco);
  box-shadow: var(--shadow-md);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); opacity: 1; }
.btn-gold {
  background: var(--dorado); color: var(--obsidiana);
  box-shadow: var(--shadow-md);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); opacity: 1; }
.btn-outline {
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover { border-color: var(--text); opacity: 1; }
.btn-ghost { padding: .75rem 1rem; color: var(--text-muted); }
.btn-ghost:hover { color: var(--text); opacity: 1; }
.btn-lg { padding: 1.15rem 2.25rem; font-size: 1.05rem; }

/* Navbar */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.nav-logo { font-weight: 700; font-size: 1.05rem; letter-spacing: -.02em; }
.nav-logo .gold { font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 2rem; list-style: none; }
.nav-links a { font-size: .95rem; color: var(--text-muted); }
.nav-links a:hover { color: var(--text); opacity: 1; }
.nav-cta { display: flex; align-items: center; gap: .75rem; }
.nav-toggle { display: none; padding: .5rem; }
.nav-toggle svg { width: 26px; height: 26px; }

@media (max-width: 900px) {
  .nav-links, .nav-cta .btn-outline { display: none; }
  .nav-toggle { display: block; }
  .nav-mobile.open { display: block; }
  .nav-mobile {
    display: none;
    position: fixed; inset: 68px 0 0 0;
    background: var(--bg);
    padding: 2rem 1.5rem;
    z-index: 40;
    border-top: 1px solid var(--border);
  }
  .nav-mobile ul { list-style: none; display: flex; flex-direction: column; gap: 1.5rem; }
  .nav-mobile a { font-size: 1.25rem; font-weight: 600; }
  .nav-mobile .btn { margin-top: 1rem; width: 100%; }
}

/* Hero */
.hero { padding: clamp(4rem, 9vw, 8rem) 0 clamp(3rem, 6vw, 5rem); }
.hero h1 {
  font-size: var(--fs-hero);
  max-width: 22ch;
  margin-bottom: 1.5rem;
}
.hero .lead { max-width: 62ch; margin-bottom: 2.5rem; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 1rem; }
.hero-trust { margin-top: 2.5rem; display: flex; align-items: center; gap: 1rem; color: var(--text-muted); font-size: .95rem; }
.hero-trust::before { content: ""; display: block; width: 40px; height: 1px; background: var(--border); }

/* Cards */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 800px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--accent) 30%, var(--border)); }
.card .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  color: var(--accent); font-weight: 700; margin-bottom: 1rem;
}
.card .icon { width: 40px; height: 40px; margin-bottom: 1rem; color: var(--accent); }
.card h3 { margin-bottom: .5rem; }
.card p { font-size: .95rem; }
.card a { color: var(--accent); font-weight: 600; }

/* Pilar cards (con arrow) */
.pillar-card {
  display: flex; flex-direction: column; justify-content: space-between;
  min-height: 240px;
  background: linear-gradient(135deg, var(--bg-alt), var(--bg));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: all .3s var(--ease);
}
.pillar-card:hover { transform: translateY(-4px); border-color: var(--accent); opacity: 1; }
.pillar-card h3 { margin-bottom: .75rem; }
.pillar-card .arrow { align-self: flex-start; margin-top: 1.5rem; color: var(--accent); font-weight: 600; }

/* Two column */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.split.narrow { grid-template-columns: 1.1fr .9fr; }
@media (max-width: 800px) { .split { grid-template-columns: 1fr; } }

/* Bloques SEO/AEO */
.answer-box {
  background: var(--bg-alt);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
}
.answer-box .label { font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: .5rem; }
.answer-box p { color: var(--text); font-size: 1.05rem; }

.callout {
  background: var(--obsidiana); color: var(--blanco);
  border-radius: var(--radius-xl); padding: clamp(3rem, 6vw, 5rem);
  text-align: center;
}
.callout h2, .callout h3 { color: var(--blanco); }
.callout p { color: rgba(255,255,255,.7); max-width: 55ch; margin: 0 auto 2rem; }
.callout .btn-gold { background: var(--dorado); }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; text-align: center; }
@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat .num { font-size: clamp(2.2rem, 4vw, 3.4rem); font-weight: 700; color: var(--accent); line-height: 1; letter-spacing: -.03em; }
.stat .label { color: var(--text-muted); font-size: .95rem; margin-top: .5rem; }

/* Antes/Después */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
@media (max-width: 700px) { .compare { grid-template-columns: 1fr; } }
.compare > div { padding: 2rem; border-radius: var(--radius-lg); }
.compare .before { background: var(--bg-alt); }
.compare .after { background: color-mix(in srgb, var(--accent) 10%, var(--bg)); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }
.compare h4 { font-size: 1rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-muted); margin-bottom: 1rem; font-weight: 600; }
.compare .after h4 { color: var(--accent); }
.compare ul { list-style: none; }
.compare li { padding: .5rem 0; padding-left: 1.75rem; position: relative; color: var(--text); }
.compare .before li::before { content: "×"; position: absolute; left: 0; color: var(--gris-suave); font-weight: 700; }
.compare .after li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* Lista con check */
.checklist { list-style: none; }
.checklist li { padding: .65rem 0 .65rem 2rem; position: relative; color: var(--text); border-bottom: 1px solid var(--border); }
.checklist li:last-child { border-bottom: 0; }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 1rem;
  width: 20px; height: 20px; border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--accent);
}
.checklist li::after {
  content: "✓"; position: absolute; left: 5px; top: .8rem; color: var(--accent); font-weight: 700; font-size: .85rem;
}
.crosslist li::before { background: color-mix(in srgb, #DC2626 15%, transparent); }
.crosslist li::after { content: "×"; color: #DC2626; }

/* FAQ Acordeón */
.faq details {
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 0;
}
.faq details summary {
  cursor: pointer;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 600; font-size: 1.1rem; color: var(--text);
}
.faq details summary::-webkit-details-marker { display: none; }
.faq details summary::after {
  content: "+"; font-size: 1.5rem; color: var(--accent);
  transition: transform .3s var(--ease);
  font-weight: 300;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: 1rem; color: var(--text-muted); }

/* Formulario */
.form {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: clamp(2rem, 4vw, 3rem);
  box-shadow: var(--shadow-md);
}
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: .5rem; font-size: .95rem; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: .95rem 1.15rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit; font-size: 1rem;
  background: var(--bg); color: var(--text);
  transition: border-color .2s var(--ease);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--accent);
}
.form .btn { width: 100%; }
.form-note { font-size: .85rem; color: var(--text-muted); text-align: center; margin-top: 1rem; }

/* Footer */
.footer {
  background: var(--obsidiana); color: rgba(255,255,255,.65);
  padding: 4rem 0 2rem;
}
.footer h4 { color: var(--blanco); font-size: 1rem; margin-bottom: 1rem; }
.footer a { color: rgba(255,255,255,.65); font-size: .95rem; }
.footer a:hover { color: var(--blanco); opacity: 1; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
@media (max-width: 800px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; } }
.footer ul { list-style: none; display: flex; flex-direction: column; gap: .6rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 2rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  font-size: .85rem;
}

/* Breadcrumbs */
.breadcrumbs { padding: 1.5rem 0; font-size: .9rem; color: var(--text-muted); }
.breadcrumbs a { color: var(--text-muted); }
.breadcrumbs a:hover { color: var(--text); opacity: 1; }
.breadcrumbs .sep { margin: 0 .5rem; opacity: .5; }

/* Blog cards */
.post-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 1.75rem;
  transition: all .3s var(--ease);
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.post-card .tag { font-size: .75rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.post-card h3 { font-size: 1.15rem; margin: .75rem 0; }
.post-card p { font-size: .95rem; }

/* Accent bar */
.accent-bar {
  height: 3px; width: 60px; background: var(--accent);
  margin: 0 0 1.5rem 0;
}

/* Utility */
.text-center { text-align: center; }
.mt-3 { margin-top: 1rem; }
.mt-5 { margin-top: 2.5rem; }
.mt-8 { margin-top: 4rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-5 { margin-bottom: 2.5rem; }
.mb-8 { margin-bottom: 4rem; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(20px); transition: all .8s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Print */
@media print { .nav, .footer { display: none; } }