/* AMG ProTech LLC — hoja de estilos v0
   Sin framework ni build. Variables en :root para poder re-tematizar rápido
   cuando llegue la identidad de marca (F2) sin tocar la estructura. */

:root {
  --ink: #0f172a;
  --ink-soft: #3f4a5f;
  --paper: #ffffff;
  --paper-alt: #f4f6fa;
  --border: #dfe4ec;
  --brand: #1d4ed8;
  --brand-ink: #14328f;
  --accent: #0e7490;
  --radius: 14px;
  --wrap: 1100px;
  --shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 12px 28px rgb(15 23 42 / 8%);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
a { color: var(--brand-ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 20px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgb(255 255 255 / 92%);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: var(--brand); color: #fff; font-size: .85rem; letter-spacing: .5px;
}
.brand-name small { display: block; font-size: .68rem; font-weight: 600; color: var(--ink-soft); letter-spacing: .08em; }

.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a {
  padding: 8px 12px; border-radius: 8px; color: var(--ink-soft);
  text-decoration: none; font-weight: 500; font-size: .95rem;
}
.site-nav a:hover { background: var(--paper-alt); color: var(--ink); }
.site-nav .nav-lang { border: 1px solid var(--border); font-size: .8rem; }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 10px; font-size: 1.1rem; cursor: pointer; color: var(--ink);
}

/* Hero */
.hero { padding: clamp(48px, 9vw, 96px) 0 clamp(36px, 6vw, 64px); background: linear-gradient(180deg, var(--paper-alt), var(--paper)); }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700; color: var(--accent); margin-bottom: .8em; }
.lead { font-size: 1.1rem; max-width: 62ch; color: var(--ink-soft); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 28px; }

.btn {
  display: inline-block; padding: 12px 20px; border-radius: 10px; border: 1px solid transparent;
  font-weight: 600; font-size: .98rem; text-decoration: none; cursor: pointer; transition: .15s ease;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-ink); color: #fff; }
.btn-ghost { border-color: var(--border); color: var(--ink); background: var(--paper); }
.btn-ghost:hover { border-color: var(--ink-soft); }

.trust { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 28px; padding: 0; margin: 0; color: var(--ink-soft); font-size: .92rem; }
.trust li::before { content: "✓ "; color: var(--accent); font-weight: 700; }

/* Secciones */
.section { padding: clamp(48px, 8vw, 84px) 0; }
.section-alt { background: var(--paper-alt); }
.section-lead { max-width: 62ch; color: var(--ink-soft); }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.ticks { list-style: none; padding: 0; margin: 0; font-size: .93rem; color: var(--ink-soft); }
.ticks li { padding-left: 1.2em; position: relative; }
.ticks li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; max-width: 760px; }
.steps li { counter-increment: step; display: grid; gap: 2px; padding: 16px 18px 16px 58px; position: relative; background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius); }
.steps li::before {
  content: counter(step); position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center;
  background: var(--brand); color: #fff; font-size: .85rem; font-weight: 700;
}
.steps span { color: var(--ink-soft); font-size: .93rem; }

/* Contacto */
.contact-grid { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); align-items: start; }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--border); }
.contact-list span { color: var(--ink-soft); font-size: .88rem; text-transform: uppercase; letter-spacing: .06em; }

.form { display: grid; gap: 6px; }
.form label { font-size: .85rem; font-weight: 600; margin-top: 8px; }
.form input, .form textarea {
  width: 100%; padding: 11px 12px; border: 1px solid var(--border); border-radius: 10px;
  font: inherit; color: var(--ink); background: var(--paper);
}
.form input:invalid:not(:placeholder-shown) { border-color: #b42318; }
.form .btn { margin-top: 14px; justify-self: start; }
.form-note, .form-status { font-size: .82rem; color: var(--ink-soft); margin: .4em 0 0; }
.form-status[data-state="ok"] { color: #1f7a5f; font-weight: 600; }
.form-status[data-state="error"] { color: #a32e42; font-weight: 600; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--paper-alt); padding: 24px 0; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; font-size: .88rem; color: var(--ink-soft); }
.footer-inner p { margin: 0; }
.site-footer nav { display: flex; gap: 16px; }

/* Móvil */
@media (max-width: 720px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    position: absolute; inset: 100% 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 0; background: var(--paper); border-bottom: 1px solid var(--border);
    padding: 8px 20px 16px; display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px 4px; border-bottom: 1px solid var(--border); }
  .site-nav .nav-lang { align-self: flex-start; margin-top: 10px; }
  .contact-list li { grid-template-columns: 1fr; gap: 0; }
}

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