:root {
  --bg: #fdfaf4;
  --bg-soft: #f7f1e6;
  --ink: #2b2620;
  --ink-soft: #6f675c;
  --line: #eae2d3;
  --accent: #e8a020;
  --accent-deep: #b97a0a;
  --accent-soft: #fff3d6;
  --card: #ffffff;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(43, 38, 32, .06), 0 2px 8px rgba(43, 38, 32, .05);
  --shadow-lg: 0 4px 12px rgba(43, 38, 32, .07), 0 16px 40px rgba(43, 38, 32, .10);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "Segoe UI", Roboto, Inter, sans-serif;
  background:
    radial-gradient(900px 480px at 85% -8%, rgba(255, 214, 130, .35), transparent 65%),
    radial-gradient(700px 420px at -10% 30%, rgba(255, 236, 200, .5), transparent 60%),
    var(--bg);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

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

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; flex-wrap: wrap;
  max-width: 1080px; margin: 0 auto; padding: 1.1rem 1.25rem;
}

.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em;
  color: var(--ink); text-decoration: none;
}
.brand__icon { width: 26px; height: 26px; color: var(--accent); }
.brand span { color: var(--accent-deep); }

.topnav { display: flex; }
ul.topnav { display: flex; gap: .35rem; list-style: none; flex-wrap: wrap; justify-content: center; }
.topnav a {
  display: block; padding: .45rem .8rem; border-radius: 999px;
  color: var(--ink-soft); text-decoration: none; font-size: .92rem; font-weight: 600;
  transition: background .18s ease, color .18s ease;
}
.topnav a:hover { background: var(--accent-soft); color: var(--ink); }

/* ---------- Hero ---------- */
.hero { max-width: 1080px; margin: 0 auto; padding: 2.5rem 1.25rem 1.5rem; text-align: center; }

.hero__eyebrow {
  display: inline-block; padding: .35rem .95rem; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid #f3e2ba;
  color: var(--accent-deep); font-size: .78rem; font-weight: 700;
  letter-spacing: .09em; text-transform: uppercase;

}

.hero h1 {
  margin: 1.1rem auto .9rem; max-width: 15ch;
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  line-height: 1.08; letter-spacing: -.03em; font-weight: 800;

}

.hero__sub {
  max-width: 56ch; margin: 0 auto; color: var(--ink-soft); font-size: 1.05rem;

}

/* ---------- Tool ---------- */
.tool { max-width: 720px; margin: 1.75rem auto 0; padding: 0 1.25rem; }

.tool__card {
  background: var(--card); border: 1px solid var(--line); border-radius: calc(var(--radius) + 6px);
  box-shadow: var(--shadow-lg); padding: 1.6rem 1.5rem 1.75rem;

}

.tool__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: .75rem; flex-wrap: wrap; margin-bottom: 1.1rem;
}
.tool__head h2 { font-size: 1.25rem; letter-spacing: -.01em; }
.tool__hint { font-size: .85rem; color: var(--ink-soft); }

.swatches { border: 0; display: flex; gap: .6rem; flex-wrap: wrap; }

.swatch {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .55rem .85rem .55rem .6rem; min-height: 44px;
  background: var(--bg-soft); border: 1.5px solid var(--line); border-radius: 999px;
  cursor: pointer; font: inherit; font-size: .88rem; font-weight: 600; color: var(--ink-soft);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease, color .18s ease;
}
.swatch:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.swatch.is-selected { border-color: var(--accent); color: var(--ink); box-shadow: 0 0 0 3px var(--accent-soft); }

.swatch__dot {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--sw); border: 1.5px solid var(--sw-border);
  box-shadow: inset 0 1px 3px rgba(0,0,0,.08);
}

.tool__options { margin-top: 1.25rem; display: grid; gap: 1rem; }

.slider-row {
  display: flex; align-items: center; gap: .9rem;
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 12px; padding: .7rem 1rem;
}
.slider-row__label { font-size: .9rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-soft); white-space: nowrap; }
.slider-row output { font-variant-numeric: tabular-nums; font-weight: 700; min-width: 3.2ch; text-align: right; }

input[type="range"] {
  flex: 1; appearance: none; -webkit-appearance: none; height: 6px; border-radius: 999px;
  background: linear-gradient(to right, var(--accent) var(--fill, 70%), #e6ddca var(--fill, 70%));
  cursor: pointer; min-width: 0;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none; -webkit-appearance: none;
  width: 22px; height: 22px; border-radius: 50%;
  background: #fff; border: 3px solid var(--accent);
  box-shadow: var(--shadow-sm); transition: transform .15s ease;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); }
input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%;
  background: #fff; border: 3px solid var(--accent); box-shadow: var(--shadow-sm);
}

.toggle {
  display: flex; align-items: center; gap: .7rem;
  cursor: pointer; font-size: .95rem; font-weight: 500; user-select: none;
}
.toggle input { position: absolute; opacity: 0; pointer-events: none; }
.toggle__track {
  flex: none; width: 46px; height: 26px; border-radius: 999px;
  background: #e2dac8; position: relative; transition: background .2s ease;
}
.toggle__track::after {
  content: ""; position: absolute; top: 3px; left: 3px;
  width: 20px; height: 20px; border-radius: 50%; background: #fff;
  box-shadow: var(--shadow-sm); transition: transform .2s ease;
}
.toggle input:checked + .toggle__track { background: var(--accent); }
.toggle input:checked + .toggle__track::after { transform: translateX(20px); }
.toggle input:focus-visible + .toggle__track { outline: 3px solid var(--accent); outline-offset: 3px; }

.tool__aviso { margin-top: 1.15rem; font-size: .88rem; color: var(--ink-soft); }
kbd {
  padding: .1rem .45rem; border-radius: 6px;
  background: var(--bg-soft); border: 1px solid var(--line); border-bottom-width: 2px;
  font-family: inherit; font-size: .82em; font-weight: 700;
}

.btn-activar {
  margin-top: 1.15rem; width: 100%; min-height: 54px;
  display: inline-flex; align-items: center; justify-content: center; gap: .6rem;
  background: linear-gradient(135deg, #f6b73c, var(--accent) 55%, #d98f12);
  color: #fff; border: 0; border-radius: 12px; cursor: pointer;
  font: inherit; font-size: 1.05rem; font-weight: 700; letter-spacing: .02em;
  box-shadow: 0 6px 18px rgba(232, 160, 32, .38), inset 0 1px 0 rgba(255,255,255,.35);
  transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
}
.btn-activar svg { width: 22px; height: 22px; }
.btn-activar:hover { transform: translateY(-2px); filter: brightness(1.04); box-shadow: 0 10px 26px rgba(232, 160, 32, .45), inset 0 1px 0 rgba(255,255,255,.35); }
.btn-activar:active { transform: translateY(0); }

.btn-activar--sec { width: auto; padding: 0 2.2rem; }

.tool__nota { margin-top: .8rem; font-size: .85rem; color: var(--accent-deep); }

/* ---------- Content ---------- */
.content { max-width: 1080px; margin: 0 auto; padding: 3rem 1.25rem 1rem; display: grid; gap: 2.5rem; }

.block h2 { font-size: clamp(1.4rem, 3vw, 1.8rem); letter-spacing: -.02em; margin-bottom: .8rem; }
.block > p { color: var(--ink-soft); max-width: 72ch; }

.steps { margin: .5rem 0 0 1.2rem; display: grid; gap: .6rem; color: var(--ink-soft); }
.steps strong { color: var(--ink); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.1rem; margin-top: .5rem; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); padding: 1.3rem 1.25rem;
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.card h3 { font-size: 1.05rem; margin-bottom: .4rem; }
.card p { font-size: .93rem; color: var(--ink-soft); }

details {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 1rem 1.2rem; margin-bottom: .7rem; box-shadow: var(--shadow-sm);
}
details summary {
  cursor: pointer; font-weight: 700; font-size: .98rem; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; color: var(--accent-deep); font-size: 1.3rem; line-height: 1; transition: transform .2s ease; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin-top: .6rem; color: var(--ink-soft); font-size: .94rem; }

.cta-final { text-align: center; padding: 2.5rem 1.25rem 3rem; }
.cta-final h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); letter-spacing: -.02em; margin-bottom: 1.1rem; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line); background: var(--bg-soft);
  text-align: center; padding: 2rem 1.25rem;
}
.footer__brand { font-weight: 800; }
.footer__brand span { color: var(--accent-deep); }
.footer__links { display: flex; justify-content: center; flex-wrap: wrap; gap: .3rem 1.2rem; list-style: none; margin: .7rem 0; }
.footer__links a { color: var(--ink-soft); text-decoration: none; font-size: .9rem; }
.footer__links a:hover { color: var(--ink); text-decoration: underline; }
.footer__copy { font-size: .82rem; color: var(--ink-soft); }

/* ---------- Overlay (pantalla en blanco activa) ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 999;
  background: var(--ov-color, #ffffff);
  opacity: var(--ov-brillo, 1);
  cursor: pointer;
}
.overlay__clock {
  position: fixed; top: 4vh; left: 50%; transform: translateX(-50%);
  font-size: clamp(2rem, 6vw, 3.4rem); font-weight: 300; letter-spacing: .06em;
  color: rgba(60, 55, 48, .28); font-variant-numeric: tabular-nums;
  opacity: 0; transition: opacity .4s ease; pointer-events: none;
}
.overlay__clock.is-visible { opacity: 1; }
.overlay__salir {
  position: fixed; bottom: 3.5vh; left: 50%; transform: translateX(-50%);
  font-size: .85rem; letter-spacing: .08em; text-transform: uppercase;
  color: rgba(60, 55, 48, .3); opacity: 0; transition: opacity .4s ease; pointer-events: none;
  white-space: nowrap;
}
.overlay.is-awake .overlay__clock,
.overlay.is-awake .overlay__salir { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

@media (max-width: 480px) {
  .topbar { padding: .9rem 1rem; }
  .topnav a { padding: .4rem .6rem; font-size: .85rem; }
  .hero { padding-top: 1.4rem; }
  .hero__eyebrow { font-size: .68rem; padding: .3rem .7rem; letter-spacing: .06em; }
  .hero h1 { max-width: none; margin: .8rem auto .6rem; }
  .hero__sub { font-size: .92rem; }
  .tool { margin-top: 1rem; }
  .tool__card { padding: 1.05rem 1rem 1.2rem; }
  .tool__head { margin-bottom: .8rem; }
  .tool__options { margin-top: .85rem; gap: .75rem; }
  .tool__aviso { margin-top: .8rem; }
  .btn-activar { margin-top: .9rem; }
  .swatches { gap: .45rem; }
  .swatch { padding: .4rem .7rem .4rem .5rem; font-size: .82rem; }
  .slider-row { flex-wrap: wrap; padding: .6rem .8rem; }
  .slider-row input[type="range"] { order: 3; flex-basis: 100%; }
}