/* ============================================================
   Agentes de IA en la Empresa — Sitio teaser
   Sistema de diseño: oscuro, tecnológico, editorial.
   ============================================================ */

:root {
  --bg: #06070d;
  --bg-soft: #0a0d18;
  --surface: #10142499;
  --surface-solid: #12162a;
  --border: #262c48;
  --border-soft: #1b2038;
  --text: #f5f6fb;
  --text-dim: #aab0c9;
  --text-faint: #6b7290;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --accent-3: #f472b6;
  --accent-warn: #fbbf24;
  --gradient: linear-gradient(135deg, #8b5cf6 0%, #6366f1 45%, #22d3ee 100%);
  --gradient-text: linear-gradient(135deg, #c4b5fd 0%, #a5f3fc 100%);
  --shadow-glow: 0 0 0 1px rgba(139,92,246,0.15), 0 20px 60px -20px rgba(99,102,241,0.45);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --maxw: 1180px;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent-2);
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Background canvas ---------- */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.55;
  pointer-events: none;
}

.noise-overlay {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: radial-gradient(ellipse at top, rgba(139,92,246,0.10), transparent 55%),
                     radial-gradient(ellipse at bottom right, rgba(34,211,238,0.08), transparent 50%);
}

main, header, footer { position: relative; z-index: 2; }

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(6,7,13,0.72);
  border-bottom: 1px solid var(--border-soft);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  min-width: 0;
  flex: 0 1 auto;
  overflow: hidden;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--gradient);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: 0 4px 18px -4px rgba(139,92,246,0.7);
}

.brand-mark svg { width: 16px; height: 16px; }

.brand-text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.brand-text small { font-family: var(--font-body); font-weight: 400; font-size: 11px; color: var(--text-faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-links a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.2s ease;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: var(--text);
}

.mobile-panel {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: 10px 0 22px;
  border-top: 1px solid var(--border-soft);
}
.mobile-panel a {
  padding: 12px 4px;
  font-size: 15px;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-soft);
}
.mobile-panel.open { display: flex; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14.5px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--gradient);
  color: #08040f;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(139,92,246,0.3), 0 26px 70px -18px rgba(99,102,241,0.6); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); }

.btn-sm { padding: 10px 18px; font-size: 13.5px; }
.btn-block { width: 100%; }

.btn[disabled], .btn.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  filter: grayscale(0.3);
}
.btn[disabled]:hover, .btn.is-disabled:hover { transform: none; box-shadow: none; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(139,92,246,0.12);
  border: 1px solid rgba(139,92,246,0.35);
  color: #d8ccff;
  letter-spacing: 0.02em;
}
.badge .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 8px 2px rgba(34,211,238,0.8);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* ---------- Sections ---------- */
section { padding: 120px 0; position: relative; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(28px, 3.4vw, 42px); margin-bottom: 18px; }
.section-head p { color: var(--text-dim); font-size: 17px; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* ---------- Hero ---------- */
.hero {
  padding: 74px 0 100px;
  display: grid;
  grid-template-columns: 1.05fr 0.85fr;
  gap: 56px;
  align-items: center;
  min-height: calc(100vh - 74px);
}

.hero h1 {
  font-size: clamp(34px, 5vw, 60px);
  letter-spacing: -0.01em;
  margin-bottom: 22px;
}

.hero-lede {
  font-size: 18px;
  color: var(--text-dim);
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-cta-row { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-bottom: 40px; }

.hero-meta {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  padding-top: 28px;
  border-top: 1px solid var(--border-soft);
}
.hero-meta div { display: flex; flex-direction: column; gap: 4px; }
.hero-meta strong { font-family: var(--font-display); font-size: 15px; }
.hero-meta span { font-size: 12.5px; color: var(--text-faint); }

/* Book cover mockup */
.cover-wrap {
  display: flex;
  justify-content: center;
  perspective: 1400px;
}

.cover {
  position: relative;
  width: 320px;
  aspect-ratio: 5 / 7.4;
  border-radius: 14px;
  padding: 34px 28px;
  background:
    radial-gradient(120% 140% at 15% 0%, rgba(139,92,246,0.55), transparent 55%),
    radial-gradient(120% 140% at 100% 100%, rgba(34,211,238,0.4), transparent 55%),
    linear-gradient(160deg, #14172b 0%, #090a14 70%);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 40px 90px -30px rgba(0,0,0,0.8), 0 0 0 1px rgba(255,255,255,0.04) inset;
  transform: rotateY(-14deg) rotateX(4deg);
  transition: transform 0.5s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}
.cover:hover { transform: rotateY(-6deg) rotateX(2deg); }

.cover svg.cover-motif { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.5; }

.cover-top { position: relative; z-index: 2; }
.cover-kicker { font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-2); margin-bottom: 14px; }
.cover-title { font-family: var(--font-display); font-size: 25px; line-height: 1.22; font-weight: 700; color: #fff; }
.cover-sub { font-family: var(--font-display); font-size: 13px; color: rgba(255,255,255,0.55); margin-top: 12px; }
.cover-bottom { position: relative; z-index: 2; }
.cover-author { font-family: var(--font-display); font-size: 13.5px; color: #fff; letter-spacing: 0.02em; }
.cover-author small { display: block; font-family: var(--font-body); font-weight: 400; color: rgba(255,255,255,0.5); font-size: 11px; margin-top: 3px; }

.cover-shadow {
  width: 260px;
  height: 34px;
  margin: -10px auto 0;
  background: radial-gradient(ellipse, rgba(0,0,0,0.55), transparent 70%);
  filter: blur(2px);
}

/* ---------- Stats / problem section ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 30px 28px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 46px;
  font-weight: 700;
  margin-bottom: 10px;
}

.stat-card p { color: var(--text-dim); font-size: 14.5px; }
.stat-source { display: block; margin-top: 12px; font-size: 12px; color: var(--text-faint); }

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.case-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 28px;
}

.case-card .case-tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-3);
  margin-bottom: 12px;
}

.case-card h4 { font-size: 18px; margin-bottom: 10px; }
.case-card p { color: var(--text-dim); font-size: 14.5px; margin-bottom: 12px; }
.case-lesson {
  font-size: 13.5px;
  color: var(--text);
  border-left: 2px solid var(--accent-2);
  padding-left: 12px;
}

/* ---------- Quote ---------- */
.quote-block {
  margin: 90px auto 0;
  max-width: 780px;
  text-align: center;
}
.quote-block blockquote {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.4;
  margin: 0 0 20px;
}
.quote-block cite { font-size: 14px; color: var(--text-faint); font-style: normal; }

/* ---------- Audience cards ---------- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.audience-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 26px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.audience-card:hover { border-color: rgba(139,92,246,0.45); transform: translateY(-4px); }

.audience-icon {
  width: 42px; height: 42px;
  border-radius: 11px;
  background: rgba(139,92,246,0.14);
  border: 1px solid rgba(139,92,246,0.3);
  display: grid; place-items: center;
  margin-bottom: 16px;
  color: var(--accent-2);
}
.audience-icon svg { width: 20px; height: 20px; }

.audience-card h4 { font-size: 16.5px; margin-bottom: 8px; }
.audience-card p { font-size: 14px; color: var(--text-dim); }

.audience-note {
  margin-top: 28px;
  font-size: 14.5px;
  color: var(--text-dim);
  border-top: 1px solid var(--border-soft);
  padding-top: 24px;
}
.audience-note strong { color: var(--text); }

/* ---------- Table of contents ---------- */
.toc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.toc-part-label {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 18px;
  display: block;
}

.toc-list { display: flex; flex-direction: column; }

.toc-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-soft);
}
.toc-item .num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--text-faint);
  flex-shrink: 0;
  width: 26px;
}
.toc-item p { font-size: 14.5px; color: var(--text-dim); line-height: 1.5; }
.toc-item.highlight p { color: var(--text); }

.toc-extra {
  margin-top: 46px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.toc-extra-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 20px;
}
.toc-extra-card .tag { font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-3); font-weight: 700; }
.toc-extra-card h5 { font-size: 15px; margin: 8px 0 6px; }
.toc-extra-card p { font-size: 13px; color: var(--text-dim); }

/* ---------- What you won't find ---------- */
.limits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.limit-item {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
}
.limit-item svg { flex-shrink: 0; width: 20px; height: 20px; color: var(--text-faint); margin-top: 2px; }
.limit-item p { font-size: 14.5px; color: var(--text-dim); }

.bias-callout {
  margin-top: 26px;
  padding: 24px 26px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(139,92,246,0.14), rgba(34,211,238,0.08));
  border: 1px solid rgba(139,92,246,0.3);
  font-size: 15px;
}
.bias-callout strong { display: block; margin-bottom: 6px; font-family: var(--font-display); }

/* ---------- 90 day plan ---------- */
.plan-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.plan-track::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 4%;
  right: 4%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), var(--border), transparent);
  z-index: 0;
}
.plan-step { position: relative; z-index: 1; }
.plan-step .plan-dot {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 18px;
  color: var(--accent-2);
}
.plan-step h4 { font-size: 15.5px; margin-bottom: 8px; }
.plan-step p { font-size: 13.5px; color: var(--text-dim); }
.plan-step .weeks { display:block; font-size: 11.5px; color: var(--text-faint); letter-spacing: .04em; text-transform: uppercase; margin-bottom: 10px; }

.plan-footnote {
  margin-top: 40px;
  font-size: 14.5px;
  color: var(--text-dim);
  text-align: center;
}

/* ---------- Author ---------- */
.author-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 48px;
  align-items: start;
}

.author-photo-wrap {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-soft);
}
.author-photo-wrap::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(6,7,13,0.85));
}
.author-photo-wrap img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(0.15) contrast(1.05); }

.author-name { font-size: 26px; margin-bottom: 6px; }
.author-role { font-size: 14.5px; color: var(--accent-2); margin-bottom: 22px; display: block; }
.author-bio p { color: var(--text-dim); font-size: 15px; margin-bottom: 16px; }
.author-links { display: flex; gap: 14px; margin-top: 22px; }

/* ---------- Final CTA ---------- */
.final-cta {
  text-align: center;
  padding: 90px 48px;
  border-radius: 32px;
  background: linear-gradient(160deg, rgba(139,92,246,0.16), rgba(34,211,238,0.08));
  border: 1px solid rgba(139,92,246,0.3);
  position: relative;
  overflow: hidden;
}
.final-cta h2 { font-size: clamp(28px, 4vw, 44px); margin-bottom: 18px; }
.final-cta p { color: var(--text-dim); font-size: 17px; max-width: 560px; margin: 0 auto 34px; }
.final-cta .btn-row { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.final-note { margin-top: 22px; font-size: 13px; color: var(--text-faint); }

/* ---------- Footer ---------- */
.site-footer {
  padding: 56px 0 40px;
  border-top: 1px solid var(--border-soft);
}
.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-size: 14px; }
.footer-fine { font-size: 12.5px; color: var(--text-faint); }

/* ---------- Hidden resource pages ---------- */
.resource-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}
.resource-card {
  max-width: 560px;
  width: 100%;
  background: var(--surface-solid);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
}
.resource-icon {
  width: 60px; height: 60px;
  margin: 0 auto 24px;
  border-radius: 16px;
  background: var(--gradient);
  display: grid; place-items: center;
  box-shadow: var(--shadow-glow);
}
.resource-icon svg { width: 28px; height: 28px; color: #08040f; }
.resource-card h1 { font-size: 24px; margin-bottom: 14px; }
.resource-card p { color: var(--text-dim); font-size: 15px; margin-bottom: 30px; }
.resource-status { margin-top: 18px; font-size: 13px; color: var(--text-faint); }
.resource-back { display: inline-block; margin-top: 30px; font-size: 13.5px; color: var(--text-faint); border-bottom: 1px dotted var(--border); }
.resource-back:hover { color: var(--accent-2); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding-top: 40px; }
  .cover-wrap { transform: scale(0.82); margin: -20px 0; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .stat-grid, .case-grid, .audience-grid, .toc-grid, .limits-grid, .toc-extra { grid-template-columns: 1fr; }
  .plan-track { grid-template-columns: 1fr 1fr; row-gap: 40px; }
  .plan-track::before { display: none; }
  .author-grid { grid-template-columns: 1fr; }
  .author-photo-wrap { max-width: 260px; }
}

@media (max-width: 560px) {
  .brand-text { display: none; }
  .nav-actions { gap: 10px; }
  .nav-actions .btn-sm { padding: 10px 16px; font-size: 13px; }
  section { padding: 84px 0; }
  .hero { min-height: auto; }
  .plan-track { grid-template-columns: 1fr; }
  .final-cta { padding: 60px 24px; border-radius: 20px; }
  .hero-meta { gap: 20px; }
}