:root {
    --navy: #023269;
    --navy-deep: #01224a;
    --graphite: #192431;
    --cyan: #33c6d7;
    --cyan-soft: #e3f7f9;
    --cyan-ink: #0f8b99;
    --slate: #4c5b6d;
    --ink: #1c2733;
    --muted: #5d6a78;
    --line: #dfe7ee;
    --bg: #ffffff;
    --mist: #f2f7fa;
    --display: "Poppins", system-ui, -apple-system, "Segoe UI", sans-serif;
    --sans: "Open Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
    --max: 1200px;
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body { font-family: var(--sans); color: var(--ink); background: var(--bg); line-height: 1.65; font-size: 16px; -webkit-font-smoothing: antialiased; }
  h1, h2, h3, h4 { font-family: var(--display); font-weight: 600; line-height: 1.18; text-wrap: balance; color: inherit; }
  a { color: inherit; text-decoration: none; }
  img, svg { max-width: 100%; }
  .wrap { max-width: var(--max); margin: 0 auto; padding-inline: 24px; }
  .eyebrow { font-family: var(--display); font-size: .76rem; font-weight: 600; letter-spacing: .18em; text-transform: uppercase; color: var(--cyan-ink); }

  /* Barra superior */
  .topbar { background: var(--graphite); color: #b8c4d0; font-size: .82rem; }
  .topbar .wrap { display: flex; justify-content: space-between; gap: 16px; padding-block: 9px; flex-wrap: wrap; }
  .topbar .items { display: flex; gap: 22px; flex-wrap: wrap; }
  .topbar a:hover { color: #fff; }
  .topbar strong { color: #fff; font-weight: 600; }

  /* Header */
  header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
  .nav { display: flex; align-items: center; justify-content: space-between; height: 80px; gap: 24px; }
  .logo img { height: 50px; width: auto; display: block; }
  .nav-links { display: flex; align-items: center; gap: 30px; font-size: .94rem; font-weight: 500; }
  .nav-links a:not(.btn) { color: var(--slate); transition: color .2s; }
  .nav-links a:not(.btn):hover { color: var(--navy); }

  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 26px; border-radius: 6px; border: 1px solid transparent; font: 600 .8rem var(--display); letter-spacing: .1em; text-transform: uppercase; cursor: pointer; transition: transform .2s, background .2s, color .2s; }
  .btn:hover { transform: translateY(-1px); }
  .btn-navy { background: var(--navy); color: #fff; }
  .btn-navy:hover { background: var(--graphite); }
  .btn-cyan { background: var(--cyan); color: var(--navy-deep); }
  .btn-cyan:hover { background: #5ad3e1; }
  .btn-line { background: transparent; color: #fff; border-color: rgba(255,255,255,.45); }
  .btn-line:hover { background: rgba(255,255,255,.1); }
  .btn:focus-visible, a:focus-visible, summary:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
  .btn:disabled { opacity: .6; cursor: default; transform: none; }
  .btn svg { width: 18px; height: 18px; }

  /* Aviso */
  .notice { background: var(--cyan-soft); color: var(--navy); font-size: .9rem; text-align: center; padding-block: 10px; }
  .notice strong { font-weight: 600; }

  /* Hero */
  .hero { position: relative; background: radial-gradient(110% 90% at 78% 40%, #0a3f7c 0%, var(--navy) 38%, var(--graphite) 100%); color: #fff; overflow: hidden; }
  .hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1.05fr; gap: 44px; align-items: center; padding-block: 92px 150px; }
  .hero .eyebrow { color: var(--cyan); }
  .hero h1 { font-size: clamp(2.2rem, 4.6vw, 3.7rem); font-weight: 700; text-transform: uppercase; letter-spacing: .01em; margin-block: 18px 22px; }
  .hero h1 span { color: var(--cyan); }
  .hero p { color: #c4d3e3; font-size: 1.06rem; max-width: 480px; margin-bottom: 34px; }
  .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
  .xray { position: relative; border-radius: 18px; background: #040c16; box-shadow: 0 40px 80px -30px rgba(0,0,0,.7), inset 0 0 0 1px rgba(51,198,215,.18); overflow: hidden; }
  .xray img { display: block; width: 100%; height: auto; transform: scale(1.04); filter: contrast(1.15) brightness(.9); }
  .xray::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(2,50,105,.35), transparent 30%, transparent 75%, rgba(2,50,105,.4)); pointer-events: none; }
  .xray-meta { z-index: 2; position: absolute; left: 16px; right: 16px; top: 12px; display: flex; justify-content: space-between; font: 500 .68rem/1 ui-monospace, "SFMono-Regular", Consolas, monospace; letter-spacing: .08em; color: rgba(51,198,215,.8); }
  .scan { z-index: 2; position: absolute; top: 0; bottom: 0; width: 70px; left: -70px; background: linear-gradient(90deg, transparent, rgba(51,198,215,.18), transparent); animation: scan 5s ease-in-out infinite; }
  @keyframes scan { 0% { left: -70px; } 60%, 100% { left: 100%; } }

  /* Tarjetas de información */
  .info { position: relative; z-index: 5; margin-top: -84px; }
  .info-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .info-card { background: #fff; border-radius: 12px; padding: 26px 24px; box-shadow: 0 18px 40px -22px rgba(2,34,74,.4); border: 1px solid var(--line); border-top: 3px solid var(--cyan); }
  .info-card h3 { font-size: 1.05rem; color: var(--navy); margin-bottom: 10px; }
  .info-card p { font-size: .9rem; color: var(--muted); }
  .info-card b { color: var(--ink); font-weight: 600; display: block; }
  .info-card a { color: var(--cyan-ink); font-weight: 600; }

  section { padding-block: 96px; }
  .head { max-width: 660px; margin-bottom: 52px; display: grid; gap: 12px; }
  .head h2 { font-size: clamp(1.8rem, 3.3vw, 2.6rem); color: var(--navy); }
  .head p { color: var(--muted); }

  /* Nosotros */
  .why { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 48px; }
  .photo { position: relative; border-radius: 16px; overflow: hidden; box-shadow: 0 30px 60px -35px rgba(2,34,74,.5); }
  .photo img { display: block; width: 100%; height: 100%; object-fit: cover; }
  .photo figcaption { position: absolute; left: 14px; bottom: 14px; background: rgba(25,36,49,.8); color: #fff; font-size: .78rem; padding: 7px 12px; border-radius: 6px; backdrop-filter: blur(6px); }
  .why-text > p { color: var(--muted); margin-bottom: 16px; max-width: 60ch; }
  .why-list { list-style: none; display: grid; gap: 14px; margin-top: 26px; }
  .why-list li { display: flex; gap: 12px; align-items: flex-start; }
  .why-list svg { flex-shrink: 0; width: 22px; height: 22px; color: var(--cyan-ink); margin-top: 2px; }
  .mv { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .mv-card { background: var(--mist); border-radius: 14px; padding: 30px 28px; border-left: 3px solid var(--cyan); }
  .mv-card h3 { color: var(--navy); font-size: 1.15rem; margin-bottom: 8px; }
  .mv-card p { color: var(--muted); font-size: .94rem; }

  /* Estudios */
  .studies { background: var(--mist); }
  .studies-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .group { background: #fff; border-radius: 14px; padding: 34px 30px; border: 1px solid var(--line); }
  .group .tag { display: inline-block; font-family: var(--display); font-size: .72rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase; color: var(--navy); background: var(--cyan-soft); padding: 5px 10px; border-radius: 4px; margin-bottom: 14px; }
  .group h3 { font-size: 1.5rem; color: var(--navy); margin-bottom: 8px; }
  .group > p { color: var(--muted); font-size: .93rem; margin-bottom: 18px; }
  .study { border-top: 1px solid var(--line); }
  .study summary { padding-block: 15px; font-size: 1rem; font-weight: 600; font-family: var(--display); color: var(--ink); }
  .study p { color: var(--muted); font-size: .92rem; padding-bottom: 16px; }
  .pack { margin-top: 20px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; background: var(--navy); color: #fff; border-radius: 14px; padding: 30px 32px; }
  .pack h3 { font-size: 1.3rem; margin-bottom: 4px; }
  .pack p { color: #c4d3e3; font-size: .93rem; max-width: 60ch; }

  /* Proceso */
  .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: step; }
  .step { border-top: 2px solid var(--navy); padding-top: 20px; }
  .step::before { counter-increment: step; content: "0" counter(step); font-family: var(--display); font-weight: 700; font-size: 1.05rem; color: var(--cyan-ink); display: block; margin-bottom: 12px; }
  .step h3 { font-size: 1.12rem; color: var(--navy); margin-bottom: 8px; }
  .step p { color: var(--muted); font-size: .93rem; }

  /* Doctores */
  .referral { background: linear-gradient(135deg, var(--cyan-soft), #d3f1f5); border-radius: 18px; padding: 56px; display: grid; grid-template-columns: 1.25fr .75fr; gap: 40px; align-items: center; }
  .referral h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); color: var(--navy); margin-block: 12px; }
  .referral p { color: var(--slate); max-width: 56ch; margin-bottom: 24px; }
  .referral ul { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; font-size: .92rem; margin-bottom: 28px; }
  .photo.portrait { aspect-ratio: 4 / 5; max-width: 100%; }
  .photo.portrait img { object-position: center 20%; }
  .referral li { background: rgba(255,255,255,.8); border-radius: 8px; padding: 12px 16px; color: var(--navy); font-weight: 500; }

  /* FAQ */
  .faq-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; align-items: start; }
  details { border-bottom: 1px solid var(--line); }
  summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-block: 22px; font-weight: 600; font-size: 1.02rem; }
  summary::-webkit-details-marker { display: none; }
  summary::after { content: "+"; font-family: var(--display); font-size: 1.5rem; line-height: 1; color: var(--cyan-ink); transition: transform .25s; flex-shrink: 0; }
  details[open] > summary::after { transform: rotate(45deg); }
  .faq details p { color: var(--muted); padding-bottom: 22px; max-width: 62ch; }

  /* Reservar */
  .booking { background: linear-gradient(160deg, var(--navy) 0%, var(--graphite) 100%); color: #fff; }
  .booking-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 64px; align-items: start; }
  .booking .eyebrow { color: var(--cyan); }
  .booking h2 { font-size: clamp(1.9rem, 3.4vw, 2.8rem); text-transform: uppercase; margin-block: 14px 16px; }
  .booking .lead { color: #c4d3e3; margin-bottom: 32px; }
  .contact-list { list-style: none; display: grid; gap: 20px; }
  .contact-list li { display: flex; gap: 14px; color: #c4d3e3; font-size: .95rem; }
  .contact-list strong { display: block; color: #fff; font-weight: 600; }
  .contact-list a:hover { color: #fff; }
  .contact-list svg { width: 20px; height: 20px; color: var(--cyan); flex-shrink: 0; margin-top: 3px; }
  form { background: #fff; color: var(--ink); border-radius: 16px; padding: 36px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  .field { display: flex; flex-direction: column; gap: 6px; }
  .field.full { grid-column: 1 / -1; }
  label { font-size: .82rem; font-weight: 600; color: var(--slate); }
  input, select, textarea { font: 400 .95rem var(--sans); color: var(--ink); padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; background: #fff; width: 100%; transition: border-color .2s, box-shadow .2s; }
  textarea { resize: vertical; min-height: 90px; }
  input:focus, select:focus, textarea:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(51,198,215,.22); }
  form .btn { grid-column: 1 / -1; padding: 16px; font-size: .84rem; }
  .form-note { grid-column: 1 / -1; font-size: .8rem; color: var(--muted); text-align: center; }
  .form-note a { color: var(--cyan-ink); font-weight: 600; }
  .success { grid-column: 1 / -1; background: #e6f6ee; color: #17663f; border-radius: 8px; padding: 14px; font-size: .92rem; text-align: center; }
  .success a { font-weight: 600; text-decoration: underline; }
  [hidden] { display: none !important; }

  /* WhatsApp flotante */
  .wa { position: fixed; right: 20px; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); z-index: 30; width: 56px; height: 56px; border-radius: 50%; background: #25d366; color: #fff; display: grid; place-items: center; box-shadow: 0 10px 24px -8px rgba(0,0,0,.45); transition: transform .2s; }
  .wa:hover { transform: scale(1.06); }
  .wa svg { width: 28px; height: 28px; }

  footer { background: var(--graphite); color: #93a3b4; font-size: .88rem; padding-block: 56px 32px; }
  .foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.1fr; gap: 32px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08); }
  .wordmark { font-family: var(--display); font-weight: 700; font-size: 1.5rem; letter-spacing: .06em; color: #fff; margin-bottom: 4px; }
  .wordmark span { color: var(--cyan); }
  .tagline { font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: #93a3b4; margin-bottom: 14px; }
  footer h4 { color: #fff; font-size: .76rem; letter-spacing: .16em; text-transform: uppercase; margin-bottom: 14px; }
  footer ul { list-style: none; display: grid; gap: 8px; }
  footer a:hover { color: #fff; }
  .copy { padding-top: 24px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

  @media (prefers-reduced-motion: reduce) { .scan { animation: none; display: none; } html { scroll-behavior: auto; } .btn:hover, .wa:hover { transform: none; } }

  @media (max-width: 1020px) {
    .hero-inner { grid-template-columns: 1fr; padding-block: 72px 140px; }
    .info-grid { grid-template-columns: repeat(2, 1fr); }
    .why, .faq-wrap, .booking-grid, .referral { grid-template-columns: 1fr; gap: 40px; }
    .steps { grid-template-columns: 1fr 1fr; }
    .foot-grid { grid-template-columns: 1fr 1fr; }
    .referral { padding: 40px 32px; }
    .photo.portrait { max-width: 420px; }
    .nav-links { gap: 20px; }
  }
  @media (max-width: 760px) {
    .studies-grid { grid-template-columns: 1fr; }
  }
  @media (max-width: 680px) {
    .wrap { padding-inline: 16px; }
    .nav { height: 70px; }
    .logo img { height: 40px; }
    .nav-links a:not(.btn) { display: none; }
    .nav-links .btn { padding: 11px 16px; }
    .topbar .hide-sm { display: none; }
    section { padding-block: 72px; }
    .hero-inner { padding-block: 56px 120px; }
    .info-grid, .steps, .foot-grid, .mv, .referral ul { grid-template-columns: 1fr; }
    form { grid-template-columns: 1fr; padding: 24px; }
    .referral { padding: 32px 22px; }
    .pack { padding: 26px 22px; }
    .group { padding: 28px 22px; }
  }

  /* Página de órdenes */
  .page-hero { background: radial-gradient(110% 120% at 80% 30%, #0a3f7c 0%, var(--navy) 45%, var(--graphite) 100%); color: #fff; padding-block: 64px 72px; }
  .page-hero h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); font-weight: 700; text-transform: uppercase; margin-block: 14px 16px; }
  .page-hero .eyebrow { color: var(--cyan); }
  .page-hero p { color: #c4d3e3; max-width: 62ch; font-size: 1.04rem; }
  .crumbs { font-size: .82rem; color: #93a8bf; margin-bottom: 22px; }
  .crumbs a { color: #c4d3e3; }
  .crumbs a:hover { color: #fff; }
  .crumbs span { margin-inline: 6px; }
  .nav-links a[aria-current="page"] { color: var(--navy); font-weight: 600; }
  .order-section { background: var(--mist); }
  .order-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
  .order-aside { display: grid; gap: 24px; }
  .order-info { background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--cyan); border-radius: 14px; padding: 28px 26px; }
  .order-info h2 { font-size: 1.15rem; color: var(--navy); margin-bottom: 12px; }
  .order-info ol { padding-left: 20px; display: grid; gap: 8px; color: var(--muted); font-size: .93rem; margin-bottom: 16px; }
  .order-info p { font-size: .9rem; color: var(--muted); overflow-wrap: anywhere; }
  .order-info strong { color: var(--ink); font-weight: 600; }
  .order-form { border: 1px solid var(--line); box-shadow: 0 24px 60px -40px rgba(2,34,74,.45); }
  .order-form h2 { grid-column: 1 / -1; font-size: 1.35rem; color: var(--navy); }
  .error { grid-column: 1 / -1; background: #fdecec; color: #9b1c1c; border-radius: 8px; padding: 14px; font-size: .92rem; text-align: center; }
  .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
  @media (max-width: 1020px) {
    .order-grid { grid-template-columns: 1fr; }
    .order-aside { order: 2; }
  }