/* Estilos compartidos por todas las páginas de sersur.cl.
   Tokens de color y tipografía, nav, footer, botón flotante y accesibilidad.
   Lo específico de cada página va en su propio <style>. */

  #sersur-landing {
    --bg-niebla: #EDEDE3;
    --bg-niebla-deep: #E3E2D4;
    --verde-lago: #3C4A3E;
    --verde-lago-deep: #2A352C;
    --cobre: #B5642F;
    --cobre-soft: #C97D49;
    --tinta: #20241F;
    --tinta-soft: #4A4F47;
    --crema-card: #F6F5EC;
    --linea: rgba(32,36,31,0.12);

    --serif: 'Cormorant Garamond', 'Georgia', serif;
    --sans: 'DM Sans', -apple-system, sans-serif;

    font-family: var(--sans);
    color: var(--tinta);
    background: var(--bg-niebla);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

  #sersur-landing * { box-sizing: border-box; }
  #sersur-landing img { max-width: 100%; display: block; }
  #sersur-landing a { text-decoration: none; }

  #sersur-landing .wrap {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 28px;
  }

  #sersur-landing section { position: relative; scroll-margin-top: 90px; }

  /* ---------- type ---------- */
  #sersur-landing h1, #sersur-landing h2, #sersur-landing h3 {
    font-family: var(--serif);
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--verde-lago-deep);
    margin: 0;
  }

  #sersur-landing .eyebrow {
    font-family: var(--sans);
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--cobre);
    font-weight: 600;
    margin: 0 0 14px;
  }

  #sersur-landing p { margin: 0; color: var(--tinta-soft); }

  /* ---------- NAV ---------- */
  #sersur-landing .nav {
    position: sticky;
    top: 0;
    z-index: 999;
    background: #1A1C1E;
    border-bottom: 1px solid rgba(255,255,255,.06);
    width: 100vw;
    margin-left: calc(50% - 50vw);
  }
  #sersur-landing .nav-inner {
    max-width: 1160px;
    margin: 0 auto;
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }
  #sersur-landing .nav-logo {
    background: transparent;
    padding: 0;
    border-radius: 0;
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
  }
  #sersur-landing .nav-logo img {
    height: 42px;
    width: auto;
  }
  #sersur-landing .nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    flex: 1;
    justify-content: center;
  }
  #sersur-landing .nav-link {
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 400;
    color: rgba(244,240,232,.62) !important;
    transition: color 0.2s;
    white-space: nowrap;
  }
  #sersur-landing .nav-link:hover { color: rgba(244,240,232,.95) !important; }
  #sersur-landing .nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--cobre);
    color: #1A1C1E !important;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .03em;
    text-transform: uppercase;
    padding: 12px 20px;
    border-radius: 3px;
    transition: opacity 0.2s;
    white-space: nowrap;
    flex-shrink: 0;
  }
  #sersur-landing .nav-cta:hover { opacity: .88; }
  @media (max-width: 900px) {
    #sersur-landing .nav-links { display: none; }
  }
  @media (max-width: 640px) {
    #sersur-landing .nav-cta { font-size: 12px; padding: 9px 14px; }
    #sersur-landing .nav-logo img { height: 32px; }
  }

  /* ---------- CTA button ---------- */
  #sersur-landing .btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--verde-lago-deep);
    color: #F6F5EC !important;
    font-family: var(--sans);
    font-weight: 600;
    font-size: 16px;
    padding: 16px 26px;
    border-radius: 3px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: background 0.25s ease, transform 0.25s ease;
  }
  #sersur-landing .btn-cta:hover { background: var(--cobre); transform: translateY(-1px); }
  #sersur-landing .btn-cta svg { width: 18px; height: 18px; flex-shrink: 0; stroke: #F6F5EC; }

  #sersur-landing .cta-note {
    margin-top: 12px;
    font-size: 13px;
    color: var(--tinta-soft);
    font-style: italic;
  }

  /* ---------- generic section spacing ---------- */
  #sersur-landing .section { padding: 64px 0; }
  #sersur-landing .section.alt { background: var(--crema-card); }
  #sersur-landing .antes-despues-section {
    background:
      radial-gradient(ellipse 700px 400px at 85% 10%, rgba(181,100,47,0.14), transparent 60%),
      var(--verde-lago-deep);
  }
  #sersur-landing .section-head { max-width: 640px; margin-bottom: 44px; }
  #sersur-landing .section-head h2 { font-size: clamp(26px, 3vw, 36px); line-height: 1.18; }

  /* ---------- FOOTER ---------- */
  #sersur-landing .footer {
    background: #1A201A;
  }
  #sersur-landing .footer-top {
    padding: 52px 0 40px;
    border-bottom: 1px solid rgba(246,245,236,0.08);
  }
  #sersur-landing .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr;
    gap: 36px;
  }
  #sersur-landing .footer-logo img {
    height: 32px;
    width: auto;
    margin-bottom: 12px;
  }
  #sersur-landing .footer-tagline {
    font-size: 13.5px;
    color: rgba(246,245,236,0.4);
    line-height: 1.6;
  }
  #sersur-landing .footer-col-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(246,245,236,0.32);
    margin-bottom: 14px;
    display: block;
  }
  #sersur-landing .footer-link {
    display: block;
    font-size: 14px;
    color: rgba(246,245,236,0.6) !important;
    margin-bottom: 9px;
    transition: color 0.2s;
  }
  #sersur-landing .footer-link:hover { color: #F6F5EC !important; }
  #sersur-landing .footer-bottom {
    padding: 18px 0;
  }
  #sersur-landing .footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
  }
  #sersur-landing .footer-bottom span {
    font-size: 12px;
    color: rgba(246,245,236,0.25);
  }
  @media (max-width: 700px) {
    #sersur-landing .footer-grid { grid-template-columns: 1fr 1fr; }
    #sersur-landing .footer-logo { grid-column: 1 / 3; }
  }
  @media (max-width: 480px) {
    #sersur-landing .footer-grid { grid-template-columns: 1fr; }
    #sersur-landing .footer-logo { grid-column: auto; }
  }

  /* ---------- BOTÓN FLOTANTE ---------- */
  #sersur-landing .fab {
    position: fixed;
    bottom: 26px;
    right: 22px;
    z-index: 9998;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--cobre);
    color: #fff !important;
    font-family: var(--sans);
    font-weight: 600;
    font-size: 13px;
    text-decoration: none;
    padding: 13px 20px;
    border-radius: 40px;
    box-shadow: 0 4px 20px rgba(181,100,47,0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    white-space: nowrap;
  }
  #sersur-landing .fab:hover { transform: translateY(-2px); box-shadow: 0 6px 26px rgba(181,100,47,0.5); }
  #sersur-landing .fab { transition: opacity 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease; }
  #sersur-landing .fab svg { width: 15px; height: 15px; flex-shrink: 0; stroke: #fff; }
  @media (max-width: 600px) {
    #sersur-landing .fab {
      left: 12px; right: 12px; bottom: 12px;
      border-radius: 6px; justify-content: center; font-size: 13px;
    }
  }

  /* Accesibilidad */
  #sersur-landing a:focus-visible,
  #sersur-landing button:focus-visible {
    outline: 3px solid var(--cobre);
    outline-offset: 3px;
    border-radius: 2px;
  }
  @media (prefers-reduced-motion: reduce) {
    #sersur-landing * {
      scroll-behavior: auto !important;
      transition: none !important;
      animation: none !important;
    }
  }