/* ============================================================
   Kards — Sistema de diseño (rediseño completo)
   Tema oscuro premium · Inter + Sora · accesible · responsive
   ============================================================ */

:root {
  /* Color - Pure Accessible Light Theme (Clear Blanco) */
  --bg: #FFFFFF;
  --bg-2: #F8FAFC;
  --surface: #FFFFFF;
  --surface-2: #F1F5F9;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;
  --text: #0F172A; /* Slate-900: high contrast text */
  --muted: #475569; /* Slate-600: accessible secondary text */
  --brand: #2563EB; /* Blue-600 */
  --brand-2: #0891B2; /* Cyan-600 */
  --brand-ink: #FFFFFF;
  --grad: linear-gradient(135deg, #2563EB 0%, #0891B2 100%);
  --grad-soft: linear-gradient(135deg, rgba(37,99,235,.08), rgba(8,145,178,.06));

  /* Tipografía */
  --font-body: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-display: 'Sora', var(--font-body);

  /* Medidas */
  --container: 1160px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 20px 60px -20px rgba(15,23,42,0.06);
  --shadow-glow: 0 0 0 1px var(--border), 0 24px 70px -30px rgba(8,145,178,.12);
}

/* Reset */
*,*::before,*::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  background: radial-gradient(1200px 700px at 75% -10%, rgba(37, 99, 235, 0.04) 0%, transparent 55%), var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1,h2,h3 { font-family: var(--font-display); line-height: 1.1; letter-spacing: -0.02em; font-weight: 800; }
ul { list-style: none; padding: 0; }

/* Accesibilidad */
:focus-visible { outline: 3px solid var(--brand-2); outline-offset: 2px; border-radius: 6px; }
.skip-link {
  position: fixed;
  top: 8px; left: 12px; z-index: 9999;
  clip: rect(0 0 0 0); clip-path: inset(50%);
  height: 1px; width: 1px; overflow: hidden; white-space: nowrap;
  background: var(--brand); color: #fff;
  padding: 10px 16px; border-radius: 10px;
  font-weight: 600; text-decoration: none;
}
.skip-link:focus {
  clip: auto; clip-path: none;
  height: auto; width: auto; overflow: visible; white-space: normal;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* Layout */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 22px; }
.container-narrow { max-width: 760px; }
.section { padding: clamp(56px, 9vw, 110px) 0; }
.section-alt { background: linear-gradient(180deg, transparent, var(--bg-2) 50%, transparent); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto clamp(32px,5vw,56px); }
.section-title { font-size: clamp(1.7rem, 3.6vw, 2.6rem); }
.section-lead { color: var(--muted); margin-top: 12px; font-size: 1.08rem; }
.eyebrow {
  display: inline-block; font-weight: 700; font-size: .78rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--brand-2);
  background: var(--grad-soft); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 16px;
}
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.note-muted { color: var(--muted); text-align: center; margin-top: 28px; font-size: .92rem; }

/* Botones */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 700; font-family: var(--font-body); cursor: pointer;
  border-radius: 12px; padding: 12px 22px; border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 12px 30px -10px rgba(37,99,235,.28); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-lg { padding: 15px 30px; font-size: 1.02rem; }
.btn-sm { padding: 9px 16px; font-size: .9rem; }
.btn-block { width: 100%; margin-top: auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255,255,255,.82);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo-word { font-family: var(--font-display); font-weight: 800; font-size: 1.3rem; letter-spacing: -0.02em; }
/* Logo oficial Kards — img SVG */
.logo-img { display: block; width: auto; height: 42px; object-fit: contain; }
.footer-brand .logo-img { height: 40px; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.nav-link { color: var(--muted); font-weight: 600; font-size: .95rem; transition: color .15s; }
.nav-link:hover { color: var(--text); }
.nav-toggle, .nav-burger { display: none; }
.nav-burger { width: 44px; height: 44px; border-radius: 10px; cursor: pointer; align-items: center; justify-content: center; flex-direction: column; gap: 5px; border: 1px solid var(--border); }
.nav-burger span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; }

/* Hero */
.hero { padding: clamp(40px, 7vw, 96px) 0 clamp(30px,5vw,60px); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.hero-title { font-size: clamp(2.3rem, 5.6vw, 4rem); }
.hero-sub { color: var(--muted); font-size: clamp(1.02rem,1.6vw,1.22rem); margin-top: 20px; max-width: 540px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero-trust { display: flex; align-items: center; gap: 10px; color: var(--muted); margin-top: 26px; font-size: .95rem; }
.trust-dot { width: 9px; height: 9px; border-radius: 50%; background: #22C55E; box-shadow: 0 0 0 4px rgba(34,197,94,.18); }
.hero-visual { display: flex; justify-content: center; }
.hero-art { width: 100%; max-width: 560px; }

/* Logos */
.logos { padding: 18px 0 8px; text-align: center; }
.logos-label { color: var(--muted); font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; }
.logos-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 34px; margin-top: 18px; }
.logo-chip { font-family: var(--font-display); font-weight: 700; color: #6F7EA8; font-size: 1.05rem; letter-spacing: .02em; }

/* Pasos */
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; counter-reset: step; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 30px; }
.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 12px; font-family: var(--font-display);
  font-weight: 800; background: var(--grad); color: #fff; margin-bottom: 16px;
}
.step h3 { font-size: 1.2rem; margin-bottom: 8px; }
.step p { color: var(--muted); }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.feature-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px; transition: border-color .2s, transform .2s, background .2s;
}
.feature-card:hover { border-color: var(--border-strong); transform: translateY(-3px); background: var(--surface-2); }
.feature-ic {
  display: inline-flex; align-items: center; justify-content: center; width: 52px; height: 52px;
  border-radius: 14px; background: var(--grad-soft); color: var(--brand-2); margin-bottom: 18px;
  border: 1px solid var(--border);
}
.feat-icon { width: 26px; height: 26px; }
.feature-card h3 { font-size: 1.18rem; margin-bottom: 8px; }
.feature-card p { color: var(--muted); }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; align-items: stretch; }
.plan-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px;
}
.plan-popular { border-color: transparent; background: linear-gradient(var(--bg-2),var(--bg-2)) padding-box, var(--grad) border-box; box-shadow: var(--shadow-glow); }
.plan-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--grad); color: #fff; font-size: .72rem; font-weight: 800; letter-spacing: .08em;
  text-transform: uppercase; padding: 6px 14px; border-radius: 999px;
}
.plan-name { font-size: 1.5rem; }
.plan-tagline { color: var(--muted); margin: 6px 0 22px; }
.plan-features { display: flex; flex-direction: column; gap: 12px; margin-bottom: 26px; }
.plan-features li { display: flex; align-items: flex-start; gap: 10px; color: var(--text); }
.check { color: var(--brand-2); font-weight: 800; }

/* FAQ */
.faq { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 6px 20px; }
.faq-item summary {
  cursor: pointer; font-weight: 700; font-family: var(--font-display); padding: 16px 0; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: "+"; color: var(--brand-2); font-size: 1.4rem; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { color: var(--muted); padding-bottom: 18px; }

/* CTA band */
.cta-band { padding: clamp(48px,7vw,90px) 0; }
.cta-inner {
  text-align: center; background: var(--grad); border-radius: 28px; padding: clamp(40px,6vw,68px) 28px;
  box-shadow: 0 30px 70px -28px rgba(37,99,235,.24);
}
.cta-inner h2 { font-size: clamp(1.7rem,3.6vw,2.6rem); color: #fff; }
.cta-inner p { color: rgba(255,255,255,.9); margin: 12px 0 26px; }
.cta-inner .btn-primary { background: #fff; color: #1e40af; font-weight: 700; }
.cta-band .cta-inner .btn-primary { background: #fff; color: #1e40af !important; font-weight: 700; }
.cta-band .cta-inner .btn-primary:hover { background: #eff6ff; color: #1e40af !important; }

/* Page hero (subpáginas) */
.page-hero { padding: clamp(56px,8vw,100px) 0 clamp(20px,4vw,40px); text-align: center; }
.page-title { font-size: clamp(2rem,5vw,3.2rem); }
.page-lead { color: var(--muted); font-size: 1.1rem; max-width: 640px; margin: 16px auto 0; }
.legal-body h2 { margin: 28px 0 10px; font-size: 1.3rem; }
.legal-body p { color: var(--muted); }
.legal-body a { color: var(--brand-2); }
.nf { text-align: center; }
.nf .btn { margin-top: 24px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding-top: 56px; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 40px; }
.footer-tagline { color: var(--muted); margin-top: 14px; max-width: 280px; }
.footer-col h3 { font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; font-family: var(--font-body); }
.footer-link { display: block; color: #475569; padding: 6px 0; transition: color .15s; }
.footer-link:hover { color: var(--brand); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; padding: 22px 0 40px; border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-copy { order: 2; }
  .hero-sub, .hero-cta { margin-inline: auto; }
  .hero-cta { justify-content: center; }
  .steps, .features-grid, .pricing-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-burger { display: flex; }
  .site-nav {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 4px; padding: 16px 22px 24px; background: var(--bg-2);
    border-bottom: 1px solid var(--border); transform: translateY(-130%);
    transition: transform .25s ease; box-shadow: var(--shadow);
  }
  .nav-link { padding: 12px 4px; border-bottom: 1px solid var(--border); }
  .nav-toggle:checked ~ .site-nav { transform: translateY(0); }
  .steps, .features-grid, .pricing-grid, .footer-grid { grid-template-columns: 1fr; }
}

/* ── Perfil público /c/:id ── */
.profile-wrap { padding: clamp(48px,8vw,90px) 22px; display: flex; justify-content: center; }
.profile-card {
  width: 100%; max-width: 440px; text-align: center;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: clamp(28px,5vw,40px); box-shadow: var(--shadow);
}
.profile-avatar { width: 112px; height: 112px; border-radius: 50%; object-fit: cover; margin: 0 auto 18px; border: 3px solid var(--border); }
.profile-initials {
  width: 112px; height: 112px; border-radius: 50%; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 800; font-size: 2.2rem; color: #fff;
  background: var(--grad);
}
.profile-name { font-size: 1.7rem; display: flex; align-items: center; justify-content: center; gap: 8px; }
.verified-badge {
  display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px;
  border-radius: 50%; background: var(--grad); color: #fff; font-size: .8rem; font-weight: 800;
}
.profile-role { color: var(--brand-2); font-weight: 600; margin-top: 6px; }
.profile-tagline { color: var(--muted); margin-top: 4px; }
.profile-bio { color: var(--text); margin-top: 18px; line-height: 1.7; }
.profile-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 22px; }
.action-btn {
  flex: 1 1 calc(50% - 10px); min-width: 120px; padding: 12px 14px; border-radius: 12px;
  background: var(--surface-2); border: 1px solid var(--border-strong); color: var(--text);
  font-weight: 600; transition: background .15s, transform .15s;
}
.action-btn:hover { background: rgba(15,23,42,.04); transform: translateY(-2px); }
.social-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-top: 20px; }
.social-chip { padding: 8px 14px; border-radius: 999px; background: var(--grad-soft); border: 1px solid var(--border); color: var(--brand); font-size: .88rem; font-weight: 600; }
.social-chip:hover { border-color: var(--brand-2); }
.vcard-btn { margin-top: 24px; }

/* ── Catálogo: precio ── */
.plan-price { display: flex; align-items: baseline; gap: 10px; margin: 4px 0 18px; }
.price-now { font-family: var(--font-display); font-weight: 800; font-size: 1.7rem; }
.price-was { color: var(--muted); text-decoration: line-through; font-size: 1rem; }

/* ── Checkout / formularios ── */
.checkout { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: clamp(24px,4vw,36px); }
.checkout-summary { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.checkout-summary h2 { font-size: 1.4rem; }
.checkout-price { font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; color: var(--brand-2); }
.checkout-section { font-size: 1.05rem; margin: 26px 0 12px; }
.field-label { display: block; color: var(--muted); font-size: .85rem; margin-bottom: 6px; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field {
  width: 100%; padding: 12px 14px; border-radius: 12px; font-size: .98rem; font-family: var(--font-body);
  background: var(--bg-2); color: var(--text); border: 1px solid var(--border-strong);
}
.field::placeholder { color: #6F7EA8; }
.field:focus { outline: none; border-color: var(--brand-2); box-shadow: 0 0 0 3px rgba(6,182,212,.25); }
.field-wide { grid-column: 1 / -1; }
.alert { margin-top: 22px; padding: 18px 20px; border-radius: var(--radius); }
.alert h3 { margin-bottom: 6px; }
.alert-ok { background: rgba(34,197,94,.12); border: 1px solid rgba(34,197,94,.4); color: #C9F7D8; }
.alert-err { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.4); color: #FBC9C9; }
@media (max-width: 560px) { .field-grid { grid-template-columns: 1fr; } }

/* ── Panel admin ── */
.admin-login { max-width: 460px; }
.admin-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 22px; display: flex; flex-direction: column; gap: 6px; }
.stat-label { color: var(--muted); font-size: .82rem; letter-spacing: .06em; text-transform: uppercase; }
.stat-num { font-family: var(--font-display); font-weight: 800; font-size: 1.9rem; color: var(--text); }
.admin-table { margin-top: 12px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.admin-row { display: grid; grid-template-columns: 1.2fr 1.6fr 1fr 1fr; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--border); align-items: center; font-size: .92rem; }
.admin-row:last-child { border-bottom: none; }
.admin-row-head { background: var(--bg-2); color: var(--muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }
.admin-row .ar { text-align: right; }
.pill { display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--grad-soft); border: 1px solid var(--border); color: #BFE3F6; font-size: .8rem; font-weight: 600; }
@media (max-width: 720px) { .stat-grid { grid-template-columns: 1fr 1fr; } .admin-row { grid-template-columns: 1fr 1fr; } }

/* ── Nav admin ── */
.admin-nav { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 28px; }
.admin-nav a { padding: 8px 16px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--muted); font-weight: 600; font-size: .9rem; }
.admin-nav a:hover { color: var(--text); border-color: var(--border-strong); }
.field-sm { padding: 7px 10px; font-size: .85rem; }

/* ── Editor de tarjeta ── */
.editor-hero { padding: clamp(32px,5vw,56px) 0 0; }
.editor { display: grid; grid-template-columns: 1.05fr .95fr; gap: 32px; align-items: start; padding-top: 24px; padding-bottom: 80px; }
.editor-controls { display: flex; flex-direction: column; gap: 10px; }
.save-bar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; position: sticky; top: 78px; z-index: 5; }
.save-bar .field { flex: 1; min-width: 180px; margin: 0; }
.save-actions { display: flex; gap: 8px; }
.ed-section { font-size: 1.05rem; margin: 22px 0 6px; color: var(--brand-2); }
textarea.field { min-height: 80px; resize: vertical; font-family: var(--font-body); }
.color-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 10px; }
.color-row label { display: flex; flex-direction: column; gap: 6px; font-size: .78rem; color: var(--muted); }
.color-input { width: 100%; height: 40px; padding: 2px; border: 1px solid var(--border-strong); border-radius: 10px; background: var(--bg-2); cursor: pointer; }
.switch { display: flex; align-items: center; gap: 10px; color: #CBD5F0; font-size: .95rem; padding: 6px 0; }
.switch input { width: 18px; height: 18px; accent-color: var(--brand-2); }

.editor-preview-wrap { position: sticky; top: 90px; }
.phone-frame { background: linear-gradient(180deg, #0d1430, #0a0f22); border: 1px solid var(--border-strong); border-radius: 36px; padding: 22px; box-shadow: var(--shadow); }
.pv-card { padding: 30px 24px; text-align: center; box-shadow: 0 20px 50px -20px rgba(0,0,0,.6); transition: background .15s, border-radius .15s; }
.pv-card.pv-minimal { text-align: left; }
.pv-avatar { width: 88px; height: 88px; border-radius: 50%; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-weight: 800; font-size: 1.9rem; color: #fff; background: var(--preview-accent, #06B6D4); }
.pv-minimal .pv-avatar { margin-left: 0; }
.pv-avatar-img { width: 88px; height: 88px; border-radius: 50%; object-fit: cover; margin: 0 auto 16px; border: 3px solid rgba(255,255,255,.3); }
.pv-name { font-size: 1.5rem; margin: 0; }
.pv-role { opacity: .9; margin: 4px 0 0; font-weight: 600; }
.pv-tagline { opacity: .85; margin: 6px 0 0; font-size: .92rem; }
.pv-bio { opacity: .8; margin: 14px 0 0; font-size: .9rem; line-height: 1.6; }
.pv-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 18px; }
.pv-minimal .pv-chips { justify-content: flex-start; }
.pv-chip { background: rgba(255,255,255,.12); border: 1px solid var(--preview-accent, #06B6D4); color: var(--preview-accent, #06B6D4); border-radius: 999px; padding: 6px 12px; font-size: .82rem; font-weight: 600; }
.pv-socials { display: flex; gap: 8px; justify-content: center; margin-top: 14px; }
.pv-minimal .pv-socials { justify-content: flex-start; }
.pv-soc { width: 34px; height: 34px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; background: rgba(255,255,255,.14); border: 1px solid var(--preview-accent, #06B6D4); color: var(--preview-accent, #06B6D4); font-size: .8rem; font-weight: 700; }
.pv-qr { width: 70px; height: 70px; margin: 20px auto 0; border-radius: 12px; background: rgba(255,255,255,.92); color: #0B1020; display: flex; align-items: center; justify-content: center; font-size: 2.4rem; }
.pv-minimal .pv-qr { margin-left: 0; }
.pv-hint { text-align: center; color: var(--muted); font-size: .82rem; margin-top: 14px; }
@media (max-width: 900px) { .editor { grid-template-columns: 1fr; } .editor-preview-wrap { position: static; order: -1; } }

/* ===== CSS Containment — aisla forced reflow del framework WASM =====
   contain:layout style → el browser no propaga reflows fuera del contenedor.
   El costo del reflow de tachys hydration queda encapsulado en .kard-public.
   content-visibility:auto → el browser omite render de contenido off-screen. */
#main {
  contain: layout style;
}
.kard-public {
  contain: layout style;
  /* Hint al browser: este contenedor tiene tamaño conocido antes de renderizar */
  contain-intrinsic-size: 0 600px;
}