/* =============================================================
   Dentlion · base.css
   Reset, tipografía, contenedores, botones y utilidades.
   Mobile-first: estilos base = móvil; se escala con min-width.
   ============================================================= */

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
}
body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, picture, video { max-width: 100%; display: block; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; background: none; }

/* ---- Accesibilidad: foco visible ---- */
:focus-visible {
  outline: 3px solid var(--teal-500);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---- Tipografía ---- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: var(--lh-snug);
  color: var(--navy-800);
  letter-spacing: -0.02em;
  text-wrap: balance;
}
h1 { font-size: var(--fs-hero); line-height: var(--lh-tight); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p  { text-wrap: pretty; }
strong { font-weight: 600; }
.text-accent { color: var(--color-primary); }
.text-gold   { color: var(--gold-600); }

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section-y); }
.section--surface { background: var(--color-surface); }
.section--soft    { background: var(--grad-soft); }

/* Cabecera de páginas internas (Servicios, Contacto, 404) */
.page-head {
  background: var(--grad-soft);
  border-bottom: 1px solid var(--teal-100);
  padding-block: clamp(2.5rem, 1.5rem + 5vw, 4.5rem);
}
.page-head .section-title { margin-bottom: 0.6rem; }
.page-head .section-intro { max-width: 60ch; }

/* Encabezado de sección reutilizable */
.section-head {
  max-width: 680px;
  margin-bottom: clamp(2rem, 1rem + 3vw, 3.25rem);
}
.section-head.center { margin-inline: auto; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-head);
  font-size: var(--fs-xs); font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--color-primary-strong);
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
  padding: 0.4rem 0.85rem; border-radius: var(--r-pill);
  margin-bottom: 1rem;
}
.section-title { margin-bottom: 0.85rem; }
.section-intro { font-size: var(--fs-lead); color: var(--color-muted); }

/* ---- Botones ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  font-family: var(--font-head); font-weight: 600; font-size: 0.97rem;
  line-height: 1; text-align: center; white-space: nowrap;
  padding: 0.9rem 1.5rem; border-radius: var(--r-pill);
  transition: transform var(--t-fast), box-shadow var(--t),
              background var(--t), color var(--t);
}
.btn:active { transform: translateY(1px); }
.btn svg { width: 1.15em; height: 1.15em; flex: none; }
.btn--lg    { padding: 1.05rem 1.9rem; font-size: 1.03rem; }
.btn--block { width: 100%; }

.btn--whatsapp { background: var(--color-cta); color: #04331a; box-shadow: var(--sh-cta); }
.btn--whatsapp:hover { background: var(--color-cta-strong); color: #fff; transform: translateY(-2px); }

.btn--primary { background: var(--color-primary); color: #fff; box-shadow: 0 8px 20px rgba(14,150,165,0.32); }
.btn--primary:hover { background: var(--color-primary-strong); transform: translateY(-2px); }

.btn--ghost { background: transparent; color: var(--navy-800); box-shadow: inset 0 0 0 1.5px var(--color-border); }
.btn--ghost:hover { box-shadow: inset 0 0 0 1.5px var(--color-primary); color: var(--color-primary-strong); }

.btn--light { background: rgba(255,255,255,0.12); color: #fff; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.32); backdrop-filter: blur(6px); }
.btn--light:hover { background: rgba(255,255,255,0.22); transform: translateY(-2px); }

/* ---- Banner CTA reutilizable ---- */
.cta-banner {
  text-align: center;
  background: var(--grad-soft);
  border: 1px solid var(--teal-100);
  border-radius: var(--r-lg);
  padding: clamp(2rem, 1rem + 4vw, 3rem);
}
.cta-banner h2 {
  font-size: clamp(1.35rem, 1.1rem + 1.4vw, 1.95rem);
  color: var(--navy-800);
  margin-bottom: 0.5rem;
}
.cta-banner p { color: var(--ink-soft); max-width: 48ch; margin: 0 auto 1.5rem; }
.cta-banner__actions {
  display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center;
}

/* ---- Utilidades ---- */
.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: fixed; top: 0.5rem; left: 0.5rem; z-index: 500;
  background: var(--navy-800); color: #fff; padding: 0.7rem 1.1rem;
  border-radius: var(--r-sm); transform: translateY(-150%);
  transition: transform var(--t);
}
.skip-link:focus { transform: translateY(0); }

/* Animación de aparición al hacer scroll (activada por main.js) */
.reveal {
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }

/* ---- Movimiento reducido ---- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}