/* Book Lab — estilos compartidos (landing + demo). Mobile-first: base 375 px. */

:root {
  --bg: #0a0a0b;
  --surface: #131315;
  --surface-2: #1b1b1e;
  --line: #2a2a2e;
  --text: #f5f5f4;
  --muted: #a3a3a8;
  --accent: #d9dee4;
  --accent-ink: #0a0a0b;
  --accent-soft: rgba(217, 222, 228, .12);
  --danger: #ff8a7a;
  --ok: #7ee2a8;
  --radius: 16px;
  --radius-sm: 12px;
  --gutter: max(20px, env(safe-area-inset-left), env(safe-area-inset-right));
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; } /* que ningún estilo (p. ej. .btn) muestre algo oculto */

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.6 var(--font);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; line-height: 1.05; letter-spacing: -.035em; font-weight: 800; text-wrap: balance; }
p { margin: 0; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute; left: 12px; top: -100px; z-index: 100;
  background: var(--accent); color: var(--accent-ink); padding: 12px 16px; border-radius: 10px; font-weight: 700;
}
.skip:focus { top: calc(12px + env(safe-area-inset-top)); }

.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;
}

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
.accent { color: var(--accent); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 52px; padding: 0 24px; border-radius: 999px;
  font: 700 1rem/1 var(--font); letter-spacing: -.01em; text-decoration: none;
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .15s ease, background-color .15s ease, border-color .15s ease, opacity .15s;
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: #f3f5f7; }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--text); }
.btn-sm { min-height: 48px; padding: 0 18px; font-size: .9375rem; }
.btn-block { width: 100%; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: .35; cursor: not-allowed; transform: none; }

/* ---------- Cabecera ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  padding-top: env(safe-area-inset-top);
  background: rgba(10, 10, 11, .82);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
}
.header.is-scrolled { border-bottom-color: var(--line); }
.header .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.logo { display: inline-flex; align-items: center; min-height: 48px; }
.logo img { width: 66px; height: 40px; }

/* ---------- Secciones ---------- */
.section { padding: 88px 0; }
.eyebrow {
  display: inline-block; font-size: .75rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 16px;
}
.h2 { font-size: clamp(2.25rem, 9vw, 4rem); }
.lead { color: var(--muted); font-size: 1.125rem; max-width: 34ch; margin-top: 16px; }
.rule { width: 56px; height: 3px; background: var(--accent); border: 0; margin: 28px 0; border-radius: 2px; }

/* ---------- Hero ---------- */
.hero { padding: 40px 0 0; overflow: hidden; }
.hero-grid { display: grid; gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(2.125rem, 14.5vw, 6.5rem); letter-spacing: -.05em; line-height: .95; }
.hero .lead { margin-top: 24px; font-size: 1.1875rem; max-width: 30ch; }
.hero-ctas { display: flex; flex-direction: column; gap: 12px; margin-top: 32px; }
.hero-tags {
  display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 28px 0 0; padding: 0; list-style: none;
  font-size: .875rem; color: var(--muted);
}
.hero-tags li::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); margin-right: 8px; vertical-align: middle; }
/* Móvil: el sillón arriba a todo el ancho, para que se vea nada más entrar */
.hero { position: relative; padding-top: 0; padding-bottom: 64px; }
.hero-grid > div:first-child { position: relative; z-index: 1; }
.hero-media {
  order: -1; position: relative; overflow: hidden; background: #0d0d0e;
  height: 300px; margin: 0 calc(var(--gutter) * -1) -84px;
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 70% 62%; filter: brightness(1.3) contrast(1.05); }
.hero-media::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(0deg, var(--bg) 0%, rgba(10,10,11,.55) 32%, transparent 65%),
    linear-gradient(180deg, rgba(10,10,11,.5) 0%, transparent 22%);
}
.hero h1 { text-shadow: 0 2px 18px rgba(0, 0, 0, .6); }
.hero .lead { color: #c9c9cd; }

/* ---------- Beneficios ---------- */
.cards { display: grid; gap: 12px; margin-top: 48px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px;
}
.card-icon {
  width: 48px; height: 48px; border-radius: 14px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 24px;
}
.card h3 { font-size: 1.5rem; letter-spacing: -.03em; }
.card p { color: var(--muted); margin-top: 10px; }

/* ---------- Hecho por un barbero ---------- */
.founder-card {
  border: 1px solid var(--line); border-radius: 24px; padding: 40px 24px;
  background: radial-gradient(120% 80% at 100% 0%, rgba(217, 222, 228, .10), transparent 60%), var(--surface);
}
.founder-card .h2 { font-size: clamp(2rem, 8.5vw, 3.5rem); max-width: 18ch; }
.founder-body { margin-top: 28px; display: grid; gap: 16px; max-width: 60ch; color: #c9c9cd; font-size: 1.0625rem; }
.founder-body p:last-child { color: var(--text); font-weight: 700; }
.founder-stats { list-style: none; margin: 36px 0 0; padding: 0; display: grid; gap: 12px; }
.founder-stats li { display: flex; align-items: baseline; gap: 14px; padding: 14px 0; border-top: 1px solid var(--line); }
.founder-stats b { font-size: 1.75rem; font-weight: 800; letter-spacing: -.03em; color: var(--accent); min-width: 72px; }
.founder-stats span { color: var(--muted); }
.founder-sign {
  display: inline-flex; align-items: center; min-height: 48px; margin-top: 20px;
  font-weight: 700; text-decoration: none; border-bottom: 2px solid var(--accent);
}
.founder-sign:hover { color: var(--accent); }

/* ---------- Pasos ---------- */
.steps { list-style: none; margin: 48px 0 0; padding: 0; display: grid; gap: 0; counter-reset: paso; }
.steps li {
  counter-increment: paso; display: grid; grid-template-columns: 56px 1fr; gap: 16px;
  padding: 28px 0; border-top: 1px solid var(--line);
}
.steps li:last-child { border-bottom: 1px solid var(--line); }
.steps li::before {
  content: "0" counter(paso); font-weight: 800; font-size: 1.125rem; color: var(--accent); letter-spacing: -.02em; padding-top: 2px;
}
.steps h3 { font-size: 1.375rem; letter-spacing: -.03em; }
.steps p { color: var(--muted); margin-top: 6px; }

/* ---------- CTA ---------- */
.cta {
  position: relative; overflow: hidden; border-radius: 24px;
  background: var(--accent); color: var(--accent-ink);
  padding: 48px 24px;
}
.cta h2 { font-size: clamp(2.25rem, 10vw, 4.5rem); letter-spacing: -.045em; }
.cta p { margin-top: 16px; font-size: 1.125rem; max-width: 30ch; color: #2a2400; }
.cta .btn { margin-top: 32px; background: var(--accent-ink); color: var(--text); }
.cta .btn:hover { background: #222; }
.cta :focus-visible { outline-color: var(--accent-ink); }

/* ---------- Contacto ---------- */
.contact { display: grid; gap: 32px; }
.contact-list { display: grid; gap: 10px; }
.contact-item {
  display: flex; align-items: center; gap: 16px; min-height: 72px; padding: 14px 18px;
  background: var(--surface); border: 1.5px solid var(--line); border-radius: var(--radius);
  text-decoration: none; font-weight: 700; font-size: 1.125rem; letter-spacing: -.01em; overflow-wrap: anywhere;
  transition: border-color .15s;
}
.contact-item:hover { border-color: var(--accent); }
.contact-item small { display: block; font-size: .75rem; font-weight: 600; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.contact-icon {
  flex: 0 0 auto; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: var(--accent); color: var(--accent-ink);
}

/* ---------- Pie ---------- */
.footer {
  border-top: 1px solid var(--line); color: var(--muted); font-size: .875rem;
  padding: 32px 0 calc(32px + env(safe-area-inset-bottom));
}
.footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; }
.footer a { min-height: 48px; display: inline-flex; align-items: center; text-decoration: none; }
.footer a:hover { color: var(--text); }

/* ---------- Escritorio ---------- */
@media (min-width: 768px) {
  .section { padding: 128px 0; }
  .hero { padding-top: 64px; }
  .hero-ctas { flex-direction: row; }
  .cards { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .card { padding: 36px 32px; }
  .steps { grid-template-columns: repeat(2, 1fr); column-gap: 48px; }
  .steps li:nth-last-child(2) { border-bottom: 1px solid var(--line); }
  .cta { padding: 88px 72px; }
  .founder-card { padding: 72px 64px; }
  .founder-stats { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .founder-stats li { flex-direction: column; gap: 4px; }
  .contact { grid-template-columns: 1fr 1fr; align-items: end; }
}
@media (min-width: 1024px) {
  .hero-grid { grid-template-columns: 1.15fr .85fr; }
  .hero { padding-top: 64px; padding-bottom: 0; }
  .hero-media { order: 0; height: auto; margin: 0; border-radius: 24px; aspect-ratio: 519 / 640; }
  .hero-media img { object-position: 70% 50%; filter: brightness(1.15); }
  .hero-media::after { background: linear-gradient(90deg, rgba(10,10,11,.5) 0%, transparent 40%); }
  .steps { grid-template-columns: repeat(4, 1fr); column-gap: 32px; }
  .steps li { grid-template-columns: 1fr; border-bottom: 1px solid var(--line); }
}