/* =========================================================
   ANÁLISIS PREDICTIVO Y MODELADO DE DATOS
   Peak Site Studio
   ========================================================= */

:root {
  /* Colores originales del header PeakSite */
  --site-primary: #0a0f2c;
  --site-accent: #00d4ff;
  --site-accent-2: #0099ff;
  --site-border-light: #e2e8f0;
  --site-border-dark: rgba(255, 255, 255, 0.12);
  --site-text-light: #1e2937;
  --site-text-dark: #f1f5f9;

  /* Base */
  --bg: #ffffff;
  --bg-alt: #f6f7fb;
  --fg: #0b1020;
  --fg-soft: #4b5570;
  --muted: #6b7280;
  --border: rgba(15, 23, 42, 0.08);
  --card: #ffffff;
  --card-hover: #fbfbfd;

  /* Brand */
  --primary-2: #22d3ee;       /* cyan  */
  --accent: #f472b6;
  --grad-primary: linear-gradient(135deg, #7c3aed 0%, #22d3ee 100%);
  --grad-soft: linear-gradient(135deg, rgba(124,58,237,.10), rgba(34,211,238,.10));
  --shadow-sm: 0 4px 14px rgba(15, 23, 42, .06);
  --shadow-md: 0 12px 40px rgba(15, 23, 42, .08);
  --shadow-lg: 0 30px 80px rgba(124, 58, 237, .18);
  --radius: 18px;

  --container: 1200px;
  --font-sans: "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-display: "Space Grotesk", "Inter", sans-serif;
}

/* Dark mode (compatible con tu themeToggle: .dark en <html> o <body>) */
.dark, html.dark, body.dark {
  --bg: #07091a;
  --bg-alt: #0c1030;
  --fg: #f5f7ff;
  --fg-soft: #b8bfd6;
  --muted: #8b93ad;
  --border: rgba(255,255,255,.08);
  --card: #10143a;
  --card-hover: #151a48;
  --shadow-sm: 0 4px 14px rgba(0,0,0,.35);
  --shadow-md: 0 12px 40px rgba(0,0,0,.5);
  --shadow-lg: 0 30px 80px rgba(124, 58, 237, .35);
}

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p  { color: var(--fg-soft); margin: 0 0 1em; }

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

.eyebrow, .section-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-display);
  font-size: .82rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .14em;
  color: var(--primary);
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--grad-soft);
  margin-bottom: 18px;
}
.section-eyebrow.light { color: #fff; background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.25); }
.eyebrow-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--grad-primary); box-shadow: 0 0 0 4px rgba(124,58,237,.15); }

.muted { color: var(--muted); }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  transition: transform .25s ease, box-shadow .25s ease, background .25s;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn i { width: 18px; height: 18px; transition: transform .3s ease; }
.btn:hover i { transform: translateX(3px); }
.btn.lg { padding: 18px 32px; font-size: 1.05rem; }

.btn-primary {
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 12px 30px rgba(124,58,237,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(124,58,237,.45); }

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-alt); }

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: 160px 0 100px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: .55;
  animation: float 12s ease-in-out infinite;
}
.orb-1 { width: 480px; height: 480px; background: #7c3aed; top: -120px; left: -120px; }
.orb-2 { width: 420px; height: 420px; background: #22d3ee; bottom: -160px; right: -100px; animation-delay: -4s; }

@keyframes float {
  0%,100% { transform: translateY(0) translateX(0); }
  50%     { transform: translateY(-30px) translateX(20px); }
}

.hero-content {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 60px;
  align-items: center;
}
.hero-sub { font-size: 1.2rem; max-width: 560px; margin: 20px 0 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-metrics {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; max-width: 520px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.hero-metrics strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.7rem;
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-metrics span { color: var(--muted); font-size: .85rem; }

/* Chart visual */
.hero-visual { position: relative; }
.chart-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform .5s ease;
}
.chart-card:hover { transform: perspective(1000px) rotateY(-3deg) rotateX(2deg); }
.chart-header {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 18px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}
.chart-dot { width: 10px; height: 10px; border-radius: 50%; }
.chart-dot.red { background: #ff5f57; }
.chart-dot.yellow { background: #febc2e; }
.chart-dot.green { background: #28c840; }
.chart-title { margin-left: 8px; font-family: var(--font-display); font-size: .85rem; color: var(--muted); }
.chart-body { padding: 24px; }
.chart-svg { width: 100%; height: auto; }
.chart-line {
  stroke-dasharray: 700;
  stroke-dashoffset: 700;
  animation: drawLine 2.4s ease forwards .3s;
}
@keyframes drawLine { to { stroke-dashoffset: 0; } }
.chart-tags { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.tag {
  font-size: .78rem; font-weight: 600;
  padding: 6px 12px; border-radius: 999px;
  background: rgba(124,58,237,.12); color: var(--primary);
}
.tag.alt { background: rgba(34,211,238,.15); color: #0891b2; }
.dark .tag.alt { color: #67e8f9; }

.float-card {
  position: absolute;
  display: flex; align-items: center; gap: 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 16px;
  box-shadow: var(--shadow-md);
  animation: floatCard 6s ease-in-out infinite;
}
.float-card i { width: 22px; height: 22px; color: var(--primary); }
.float-card strong { display: block; font-family: var(--font-display); font-size: .95rem; }
.float-card span { font-size: .75rem; color: var(--muted); }
.float-1 { top: -20px; left: -30px; }
.float-2 { bottom: -20px; right: -20px; animation-delay: -3s; }
@keyframes floatCard {
  0%,100% { transform: translateY(0); }
  50%     { transform: translateY(-12px); }
}

/* ============ SECTIONS ============ */
.section { padding: 100px 0; position: relative; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 780px; margin: 0 auto 60px; }
.section-head p { font-size: 1.1rem; }

/* Prose */
.prose p { font-size: 1.05rem; margin-bottom: 1.2em; }

/* ============ CARDS GRID ============ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.cards-grid.three { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 26px;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--grad-soft);
  opacity: 0; transition: opacity .35s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.card:hover::before { opacity: 1; }
.card > * { position: relative; z-index: 1; }

.card-icon {
  width: 52px; height: 52px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: var(--grad-primary);
  color: #fff;
  margin-bottom: 18px;
  box-shadow: 0 8px 20px rgba(124,58,237,.35);
}
.card-icon i { width: 26px; height: 26px; }
.card p { margin: 0; font-size: .95rem; }

/* ============ DETAIL GRID ============ */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.detail-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  position: relative;
  overflow: hidden;
  transition: transform .35s, box-shadow .35s;
}
.detail-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.detail-num {
  font-family: var(--font-display);
  font-size: 3rem; font-weight: 700;
  background: var(--grad-primary);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  opacity: .9;
  line-height: 1;
  margin-bottom: 12px;
}
.detail-card ul {
  list-style: none; padding: 0; margin: 18px 0 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px;
}
.detail-card li {
  display: flex; align-items: center; gap: 8px;
  font-size: .92rem; color: var(--fg-soft);
}
.detail-card li i {
  width: 16px; height: 16px;
  color: var(--primary);
  background: rgba(124,58,237,.12);
  border-radius: 50%; padding: 3px;
  flex-shrink: 0;
}

/* ============ CTA SECTION ============ */
.cta-section { padding: 80px 0 120px; }
.cta-card {
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
  border-radius: 28px;
  padding: 80px 40px;
  text-align: center;
  color: #fff;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-card h2 { color: #fff; }
.cta-card p {
  color: rgba(255,255,255,.8);
  max-width: 640px; margin: 0 auto 32px;
  font-size: 1.1rem;
}
.cta-glow {
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,.6), transparent 70%);
  top: -200px; left: 50%; transform: translateX(-50%);
  filter: blur(80px);
  animation: pulse 6s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: .5; transform: translateX(-50%) scale(1); }
  50%     { opacity: .8; transform: translateX(-50%) scale(1.1); }
}
.cta-card > *:not(.cta-glow) { position: relative; z-index: 1; }

/* ============ SEO LINKS ============ */
.seo-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}
.seo-links a {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-weight: 500;
  transition: all .25s;
}
.seo-links a:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateX(4px);
}
.seo-links i { width: 16px; height: 16px; color: var(--primary); }

/* ============ EXPLORE CARDS ============ */
.explore-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform .35s, box-shadow .35s, border-color .35s;
}
.explore-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}
.explore-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 14px;
  color: var(--primary);
  font-weight: 600;
  font-size: .9rem;
}
.explore-link i { width: 16px; height: 16px; transition: transform .3s; }
.explore-card:hover .explore-link i { transform: translate(3px,-3px); }

/* ============ ANIMATIONS ============ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s ease, transform .8s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
  .hero { padding: 130px 0 60px; }
  .hero-content { grid-template-columns: 1fr; gap: 60px; }
  .hero-metrics { max-width: 100%; }
  .cards-grid, .cards-grid.three { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .seo-links { grid-template-columns: 1fr; }
  .section { padding: 70px 0; }
  .cta-card { padding: 60px 24px; }
}
@media (max-width: 991px) {
  .desktop-nav,
  .nav-right,
  .header .lang-switch {
    display: none !important;
  }
  .mobile-menu-btn { display: block; }
  .header { position: relative; z-index: 100; }
  body.menu-open { overflow: hidden; }
  .mobile-theme-btn {
    display: block !important;
    height: 38px;
    width: 38px;
    font-size: 1.2rem;
    margin-left: 8px;
    position: relative !important;
    z-index: 999999 !important;
    pointer-events: auto !important;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
  }
  body.light .theme-toggle.mobile-theme-btn {
    border-color: var(--site-border-light);
    background: rgba(0, 0, 0, 0.08);
    color: var(--site-primary);
  }
  .mega-menu { display: none !important; }
}
@media (min-width: 992px) {
  .mobile-menu,
  .mobile-menu-btn,
  .mobile-theme-btn {
    display: none !important;
  }
}
@media (max-width: 560px) {
  .cards-grid, .cards-grid.three { grid-template-columns: 1fr; }
  .hero-metrics { grid-template-columns: 1fr 1fr; }
  .detail-card ul { grid-template-columns: 1fr; }
  .float-1 { left: 0; }
  .float-2 { right: 0; }
}

/* ====================== LIGHT MODE - FONDOS BLANCOS ====================== */

/* HERO en modo claro */
body:not(.dark) .hero {
  background: #ffffff !important;
  color: #1e2937 !important;
}

body:not(.dark) .hero h1,
body:not(.dark) .hero .grad-text {
  color: #0f172a !important;
}

body:not(.dark) .hero p {
  color: #475569 !important;
}

/* CTA en modo claro */
body:not(.dark) .cta-section,
body:not(.dark) .cta-card {
  background: #ffffff !important;
  color: #1e2937 !important;
}

body:not(.dark) .cta-card h2,
body:not(.dark) .cta-card .grad-text {
  color: #0f172a !important;
}

body:not(.dark) .cta-card p {
  color: #475569 !important;
}

/* FOOTER en modo claro */
body:not(.dark) .footer-pro {
  background: #f8fafd !important;
  color: #475569 !important;
}

body:not(.dark) .footer-pro h4 {
  color: #1e2937 !important;
}

body:not(.dark) .footer-pro a {
  color: #64748b !important;
}

body:not(.dark) .footer-pro a:hover {
  color: #0f172a !important;
}

body:not(.dark) .footer-bottom {
  border-top-color: #e2e8f0 !important;
  color: #64748b !important;
}