:root {
  --ink: #10242e;
  --ink-soft: #46606d;
  --line: #dde7eb;
  --bg: #ffffff;
  --bg-alt: #f2f7f9;
  --accent: #0f6b8c;
  --accent-deep: #0a4c66;
  --accent-soft: #e2f0f5;
  --radius: 14px;
  --wrap: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #e8f1f4;
    --ink-soft: #9fb6c0;
    --line: #22343d;
    --bg: #0c1619;
    --bg-alt: #111f24;
    --accent: #4bb6d8;
    --accent-deep: #7fd0ea;
    --accent-soft: #15303a;
  }
}

:root[data-theme="dark"] {
  --ink: #e8f1f4;
  --ink-soft: #9fb6c0;
  --line: #22343d;
  --bg: #0c1619;
  --bg-alt: #111f24;
  --accent: #4bb6d8;
  --accent-deep: #7fd0ea;
  --accent-soft: #15303a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 ui-sans-serif, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.3rem); }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); }
h3 { font-size: 1.08rem; letter-spacing: -0.01em; }
p { margin: 0 0 1.1em; }
a { color: var(--accent); }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 16px; }
.narrow { max-width: 720px; }

.skip {
  position: absolute; left: -9999px;
  background: var(--accent); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 10;
}
.skip:focus { left: 0; top: 0; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 24px; min-height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark { width: 26px; height: 27px; flex: none; color: var(--accent); display: block; }
.brand-text { font-size: 1.02rem; letter-spacing: -0.02em; }
.brand-text strong { font-weight: 700; color: var(--accent); }
.site-header nav { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.site-header nav a { color: var(--ink-soft); text-decoration: none; font-size: .95rem; }
.site-header nav a:hover { color: var(--accent); }
.nav-cta {
  border: 1px solid var(--line); border-radius: 999px; padding: 7px 15px; color: var(--accent) !important;
}
.nav-cta:hover { background: var(--accent-soft); }

@media (max-width: 760px) {
  .site-header nav a:not(.nav-cta) { display: none; }
}

/* Hero */
.hero { padding: clamp(56px, 9vw, 104px) 0 clamp(40px, 6vw, 72px); }
.eyebrow {
  text-transform: uppercase; letter-spacing: .14em; font-size: .76rem; font-weight: 600;
  color: var(--accent); margin-bottom: 14px;
}
.hero h1 { max-width: 16ch; }
.lede { font-size: clamp(1.02rem, 2vw, 1.18rem); color: var(--ink-soft); max-width: 58ch; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 0; }
.btn {
  display: inline-block; padding: 13px 22px; border-radius: 999px; text-decoration: none;
  font-weight: 600; font-size: .97rem; border: 1px solid transparent; transition: transform .12s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-deep); }
.btn-ghost { border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { background: var(--bg-alt); }

.trust {
  list-style: none; padding: 0; margin: 40px 0 0;
  display: flex; flex-wrap: wrap; gap: 14px 36px;
  border-top: 1px solid var(--line); padding-top: 24px;
  color: var(--ink-soft); font-size: .94rem;
}
.trust strong { display: block; color: var(--ink); font-size: 1.35rem; letter-spacing: -0.02em; }

/* Bands and sections */
.band { background: var(--bg-alt); border-block: 1px solid var(--line); padding: clamp(36px, 5vw, 56px) 0; }
.cols-3 { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.cols-3 h3 { color: var(--accent); }
.cols-3 p { color: var(--ink-soft); margin: 0; font-size: .97rem; }

.section { padding: clamp(56px, 8vw, 92px) 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section-lede { color: var(--ink-soft); max-width: 60ch; }

/* Courses */
.cursos { display: grid; gap: 20px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); margin-top: 36px; }
.grupo {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px 22px 8px;
  background: var(--bg);
}
.grupo h3 { color: var(--accent); margin-bottom: 14px; }
.grupo ul { list-style: none; margin: 0; padding: 0; }
.grupo li {
  display: flex; gap: 14px; align-items: baseline; justify-content: space-between;
  padding: 11px 0; border-top: 1px solid var(--line); font-size: .96rem;
}
.grupo li span { flex: 1; }
.grupo li small { display: block; color: var(--ink-soft); font-size: .82rem; letter-spacing: .02em; }
.grupo li em {
  font-style: normal; font-weight: 600; font-size: .86rem; color: var(--accent);
  background: var(--accent-soft); border-radius: 999px; padding: 3px 10px; white-space: nowrap;
}

/* Who */
.nombre { font-size: 1.3rem; font-weight: 600; letter-spacing: -0.02em; margin-bottom: .4em; }
.credenciales { list-style: none; padding: 0; margin: 0; }
.credenciales li {
  padding: 10px 0 10px 28px; border-top: 1px solid var(--line); color: var(--ink-soft); position: relative;
}
.credenciales li::before {
  content: ""; position: absolute; left: 4px; top: 18px;
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
}

/* Contact */
.section-contact { background: var(--accent-soft); border-top: 1px solid var(--line); }
.section-contact p { color: var(--ink-soft); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line); padding: 28px 0;
  color: var(--ink-soft); font-size: .9rem;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
.site-footer p { margin: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* Services */
.servicios { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); margin-top: 36px; }
.serv {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 22px;
  background: var(--bg);
}
.serv h3 { margin-bottom: .45em; }
.serv p { color: var(--ink-soft); font-size: .95rem; margin: 0; }
.serv a { display: inline-block; margin-top: 12px; font-size: .9rem; font-weight: 600; text-decoration: none; }
.serv a:hover { text-decoration: underline; }
.serv.destacado { border-color: color-mix(in srgb, var(--accent) 38%, var(--line)); }
.serv .tag {
  text-transform: uppercase; letter-spacing: .12em; font-size: .68rem; font-weight: 700;
  color: var(--accent); margin-bottom: 8px;
}
.zona { margin-top: 24px; font-size: .92rem; }

/* Legal pages */
.legal h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); }
.legal h2 { font-size: 1.15rem; margin-top: 2em; }
.legal .fecha { color: var(--ink-soft); font-size: .9rem; margin-bottom: 2.5em; }
.legal ul { color: var(--ink-soft); padding-left: 1.2em; }
.legal li { margin-bottom: .5em; }