/* DexterLIS — Sitio público
   CSS único, mobile-first, sin frameworks. */

:root {
  --color-primary: #0a4f7a;
  --color-primary-dark: #083a5c;
  --color-primary-soft: #e6f0f7;
  --color-accent: #0ea5a4;
  --color-accent-dark: #0c8a89;
  --color-text: #0f172a;
  --color-muted: #475569;
  --color-bg: #ffffff;
  --color-bg-soft: #f8fafc;
  --color-border: #e2e8f0;
  --color-warn-bg: #fff7ed;
  --color-warn-border: #fed7aa;
  --color-warn-text: #7c2d12;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, .08);
  --container-max: 1140px;
  --space-1: .25rem;
  --space-2: .5rem;
  --space-3: .75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}

body { margin: 0; }
img, svg { max-width: 100%; height: auto; display: block; }

a { color: var(--color-primary); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.2; color: var(--color-text); margin: 0 0 var(--space-4); }
h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 2.5vw, 2rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }
p { margin: 0 0 var(--space-4); }
ul, ol { padding-left: 1.25rem; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-2);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  z-index: 100;
}
.skip-link:focus { left: var(--space-2); text-decoration: none; }

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  min-height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  color: var(--color-text);
  line-height: 0;
}
.brand:hover, .brand:focus { text-decoration: none; }
.brand-logo {
  height: 44px;
  width: auto;
  display: block;
}
.footer-logo {
  height: 64px;
  width: auto;
  display: block;
  margin-bottom: var(--space-3);
}

.primary-nav { margin-left: auto; }
.primary-nav ul {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-5);
}
.primary-nav a {
  color: var(--color-text);
  font-size: .92rem;
  font-weight: 500;
}
.primary-nav a:hover, .primary-nav a:focus {
  color: var(--color-primary);
  text-decoration: none;
}
.nav-toggle {
  margin-left: auto;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  font: inherit;
  color: var(--color-text);
  cursor: pointer;
}
.header-cta { display: none; }

@media (min-width: 980px) {
  .nav-toggle { display: none; }
  .primary-nav ul { display: flex; }
  .header-cta { display: inline-flex; }
}

@media (max-width: 979px) {
  .primary-nav ul.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: #fff;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-3);
    box-shadow: var(--shadow-md);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .7rem 1.2rem;
  font: inherit;
  font-weight: 600;
  font-size: .95rem;
  line-height: 1.2;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover, .btn-primary:focus {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}
.btn-secondary {
  background: #fff;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover, .btn-secondary:focus {
  background: var(--color-primary-soft);
  text-decoration: none;
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--color-primary-soft) 0%, #fff 100%);
  padding: var(--space-8) 0 var(--space-7);
}
.hero-grid {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}
@media (min-width: 860px) { .hero-grid { grid-template-columns: 1.1fr .9fr; } }
.hero h1 { margin-bottom: var(--space-4); }
.hero-lede {
  font-size: 1.15rem;
  color: var(--color-muted);
  margin-bottom: var(--space-5);
  max-width: 56ch;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.hero-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-md);
}
.hero-card h2 {
  font-size: .9rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-muted);
  margin-bottom: var(--space-3);
}
.hero-card ul { list-style: none; padding: 0; display: grid; gap: var(--space-3); margin: 0; }
.hero-card li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
  margin-right: var(--space-2);
}

/* Sections */
.section { padding: var(--space-8) 0; }
.section-soft { background: var(--color-bg-soft); }
.section-header {
  max-width: 64ch;
  margin: 0 auto var(--space-7);
  text-align: center;
}
.section-header p { color: var(--color-muted); font-size: 1.05rem; }

/* Cards */
.cards {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
}
.card h3 { margin-bottom: var(--space-2); }
.card p { color: var(--color-muted); margin-bottom: var(--space-4); flex-grow: 1; }
.card-icon {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: grid; place-items: center;
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.card a { font-weight: 600; }

/* Feature list */
.feature-list {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
  list-style: none;
  padding: 0;
  margin: 0;
}
@media (min-width: 760px) { .feature-list { grid-template-columns: repeat(2, 1fr); } }
.feature-list li {
  padding-left: 2rem;
  position: relative;
  color: var(--color-text);
}
.feature-list li::before {
  content: "";
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
  position: absolute;
  left: 0; top: 6px;
}
.feature-list strong { display: block; margin-bottom: var(--space-1); }
.feature-list span { color: var(--color-muted); }

/* CTA banner */
.cta-banner {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-7) 0;
  text-align: center;
}
.cta-banner h2 { color: #fff; }
.cta-banner p {
  color: rgba(255, 255, 255, .85);
  max-width: 60ch;
  margin: 0 auto var(--space-5);
}
.cta-banner .btn-primary { background: #fff; color: var(--color-primary); }
.cta-banner .btn-primary:hover, .cta-banner .btn-primary:focus {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}

/* FAQ */
.faq details {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-3);
}
.faq summary {
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  float: right;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-muted);
}
.faq details[open] summary::after { content: "−"; }
.faq details[open] summary { margin-bottom: var(--space-3); }

/* Form */
.form-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) {
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-grid .full { grid-column: 1 / -1; }
}
.form-field label {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: var(--space-2);
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: .65rem .85rem;
  font: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  color: var(--color-text);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}
.form-field textarea { min-height: 140px; resize: vertical; }
.form-help {
  font-size: .85rem;
  color: var(--color-muted);
  margin-top: var(--space-2);
}

/* Breadcrumbs */
.breadcrumbs {
  font-size: .85rem;
  color: var(--color-muted);
  padding: var(--space-4) 0 0;
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0;
}
.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: var(--space-2);
  color: var(--color-border);
}
.breadcrumbs a { color: var(--color-muted); }

/* Footer */
.site-footer {
  background: #0a1f33;
  color: #cbd5e1;
  padding: var(--space-7) 0 var(--space-5);
  margin-top: var(--space-8);
}
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.footer-heading {
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin: 0 0 var(--space-3);
}
.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
  font-size: .92rem;
}
.footer-tagline { color: #94a3b8; max-width: 36ch; font-size: .92rem; }
.footer-contact {
  list-style: none;
  padding: 0;
  margin: var(--space-4) 0 0;
  font-size: .88rem;
  display: grid;
  gap: var(--space-2);
  color: #cbd5e1;
}
.footer-contact strong { color: #fff; font-weight: 600; }
.footer-contact a { color: #cbd5e1; }
.footer-contact a:hover, .footer-contact a:focus { color: #fff; }
.btn-whatsapp { background: #25d366; color: #fff; }
.btn-whatsapp:hover, .btn-whatsapp:focus {
  background: #1da851;
  color: #fff;
  text-decoration: none;
}
.contact-info-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 760px) { .contact-info-grid { grid-template-columns: 1fr 1fr; } }
.contact-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.contact-card h3 { margin-bottom: var(--space-3); }
.contact-card p { margin-bottom: var(--space-2); }
.footer-copy {
  border-top: 1px solid #1e293b;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  font-size: .85rem;
  color: #94a3b8;
  text-align: center;
}

/* Utilities */
.lede { font-size: 1.1rem; color: var(--color-muted); }
.text-center { text-align: center; }
.muted { color: var(--color-muted); }
.disclaimer {
  background: var(--color-warn-bg);
  border: 1px solid var(--color-warn-border);
  color: var(--color-warn-text);
  padding: var(--space-4);
  border-radius: var(--radius);
  font-size: .95rem;
}
.note {
  background: var(--color-primary-soft);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-4);
  border-radius: 4px;
  color: var(--color-text);
}
.prose p { max-width: 70ch; }
.prose h2 { margin-top: var(--space-7); }
.prose h3 { margin-top: var(--space-5); }
.prose ul li { margin-bottom: var(--space-2); }