/* ===== OTR LIGHT THEME - Sistema de diseño compartido ===== */
:root {
  /* Base */
  --bg: #FFFFFF;
  --bg-soft: #F8FAFC;
  --bg-card: #FFFFFF;
  --ink: #0F172A;
  --ink-2: #1E293B;
  --gray: #64748B;
  --gray-2: #94A3B8;
  --gray-3: #CBD5E1;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;

  /* Marca OTR (teal identidad) */
  --teal: #0e8fa8;
  --teal-2: #0a4a56;
  --teal-3: #14b8d4;
  --teal-soft: #E0F7FB;

  /* Semánticos */
  --green: #16A34A;
  --amber: #F59E0B;
  --red: #DC2626;

  /* Radios & sombras */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.05);
  --shadow: 0 4px 12px rgba(15,23,42,.06);
  --shadow-lg: 0 20px 40px -12px rgba(15,23,42,.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 900px; margin: 0 auto; padding: 0 24px; }

/* Tipografía */
h1, h2, h3, h4, h5 { font-family: 'Poppins', 'Inter', sans-serif; font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; color: var(--ink); }

/* NAV */
.nav-wrap { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav { display: flex; justify-content: space-between; align-items: center; padding: 16px 24px; max-width: 1200px; margin: 0 auto; }
.nav .brand { font-family: 'Poppins', sans-serif; font-weight: 800; font-size: 18px; color: var(--ink); letter-spacing: -0.02em; }
.nav .brand span { color: var(--teal); }
.nav ul { list-style: none; display: flex; gap: 6px; align-items: center; }
.nav ul li a { display: block; padding: 8px 14px; font-size: 14px; font-weight: 500; color: var(--gray); border-radius: 6px; transition: .2s; }
.nav ul li a:hover { color: var(--ink); background: var(--bg-soft); }
.nav .cta { background: var(--teal); color: #fff !important; font-weight: 600 !important; padding: 10px 20px !important; }
.nav .cta:hover { background: var(--teal-2); }
.burger { display: none; }

@media (max-width: 900px) {
  .nav ul { display: none; }
  .burger { display: block; background: none; border: none; cursor: pointer; padding: 8px; }
  .burger span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 4px 0; }
  .nav ul.open { display: flex; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; background: #fff; padding: 16px; border-bottom: 1px solid var(--border); gap: 4px; }
}

/* Chips / eyebrows */
.chip { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--teal); background: var(--teal-soft); padding: 6px 14px; border-radius: 100px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--teal); margin-bottom: 14px; }
.eyebrow::before { content: ''; width: 24px; height: 2px; background: var(--teal); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 28px; border-radius: var(--r-sm); font-size: 15px; font-weight: 600; font-family: inherit; border: none; cursor: pointer; transition: all .2s; text-decoration: none; }
.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: var(--teal-2); transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--border-strong); }
.btn-ghost:hover { background: var(--bg-soft); border-color: var(--gray); }
.btn-lg { padding: 18px 34px; font-size: 16px; }

/* Sections */
section { padding: 88px 0; }
section.alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(28px, 4vw, 44px); line-height: 1.1; margin-bottom: 14px; }
.section-head p { font-size: 17px; color: var(--gray); line-height: 1.6; }
.section-head.left { text-align: left; margin-left: 0; margin-right: 0; }

/* Cards genéricas */
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r-md); padding: 28px; transition: all .2s; }
.card:hover { border-color: var(--teal); box-shadow: var(--shadow); transform: translateY(-2px); }
.card h3 { font-size: 20px; margin: 12px 0 8px; }
.card p { color: var(--gray); font-size: 15px; line-height: 1.65; }
.card .icon { width: 44px; height: 44px; background: var(--teal-soft); color: var(--teal); border-radius: var(--r-sm); display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 6px; }

/* Grid utilitario */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* KPI */
.kpi { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--r-md); padding: 24px; position: relative; overflow: hidden; }
.kpi::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--teal); }
.kpi .lbl { font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gray); margin-bottom: 6px; font-weight: 600; }
.kpi .num { font-family: 'Poppins', sans-serif; font-size: 38px; font-weight: 700; color: var(--ink); line-height: 1; letter-spacing: -0.03em; }
.kpi .delta { font-size: 13px; margin-top: 8px; font-weight: 600; }
.kpi .delta.up { color: var(--green); }
.kpi .delta.info { color: var(--teal); }
.kpi .desc { font-size: 13px; color: var(--gray); margin-top: 10px; }

/* Footer */
footer { background: var(--ink); color: #CBD5E1; padding: 60px 0 30px; }
footer h4 { color: #fff; font-size: 14px; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 18px; font-weight: 700; }
footer a { color: #94A3B8; font-size: 14px; }
footer a:hover { color: #fff; }
footer .foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 800px) { footer .foot-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
footer .foot-brand p { font-size: 14px; line-height: 1.7; margin-top: 12px; max-width: 320px; }
footer .foot-links ul { list-style: none; padding: 0; }
footer .foot-links li { margin-bottom: 10px; }
footer .foot-bottom { border-top: 1px solid #1E293B; padding-top: 24px; text-align: center; font-size: 12px; color: #64748B; }