:root {
  --bg: #FAFAFA;
  --surface: #FFFFFF;
  --ink: #1C1C1E;
  --ink-soft: rgba(28, 28, 30, 0.7);
  --accent: #007AFF;
  --accent-dark: #0A84FF;
  --danger: #FF453A;
  --hairline: #E5E5EA;
  --radius: 16px;
  --shadow: 0 8px 24px rgba(28, 28, 30, 0.08);
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin: 0 0 16px; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0; }
p { margin: 0 0 16px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand-accent { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.95rem;
}

.nav a { color: var(--ink-soft); }
.nav a:hover { color: var(--ink); text-decoration: none; }

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 16px;
  border-radius: 999px;
}
.nav-cta:hover { background: var(--accent-dark); }

.header-right { display: flex; align-items: center; gap: 20px; }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 3px 6px;
  background: var(--surface);
}

.lang-switch button {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.lang-switch button:hover { color: var(--ink); }

.lang-switch button.active {
  background: var(--accent);
  color: #fff;
}

.lang-sep { color: var(--hairline); font-size: 0.8rem; }

/* Hero */

.hero {
  background: linear-gradient(135deg, rgba(10, 132, 255, 0.10), rgba(250, 250, 250, 0) 55%);
  border-bottom: 1px solid var(--hairline);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 88px;
  padding-bottom: 88px;
}

.lede {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-dark); }

.btn-secondary {
  border: 1px solid var(--hairline);
  color: var(--ink);
  background: var(--surface);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.hero-visual svg { width: 100%; height: auto; }

/* Sections */

.section { padding: 72px 0; }

.section-tinted { background: var(--surface); border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }

.section-head h2 { margin-bottom: 20px; display: flex; align-items: center; gap: 12px; }
.section-head h2::before {
  content: "";
  width: 6px;
  height: 26px;
  border-radius: 3px;
  background: var(--accent);
  display: inline-block;
}

.section-copy { max-width: 70ch; }

/* Cards */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 28px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h3 { margin: 0 0 8px; font-size: 1.1rem; }
.card p { margin: 0; font-size: 0.95rem; color: var(--ink-soft); }

/* Checklist */

.checklist {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 12px 32px;
}

.checklist li {
  padding: 10px 0 10px 36px;
  position: relative;
  font-size: 0.98rem;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 10px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0, 122, 255, 0.12);
  color: var(--accent);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

/* Contacto */

.contact {
  text-align: center;
  padding: 48px 24px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact p { color: var(--ink-soft); margin-bottom: 28px; }

/* Footer */

.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 32px 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* Responsive */

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; padding-top: 56px; padding-bottom: 56px; }
  .nav { display: none; }
  .header-right { gap: 12px; }
}