*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step0);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.12;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--step4); }
h2 { font-size: var(--step3); }
h3 { font-size: var(--step2); }

p { margin: 0 0 1em; color: var(--slate); }

a { color: var(--brand); }

code, .mono { font-family: var(--font-mono); }

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}

.wrap {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}

.eyebrow::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--led-open);
  box-shadow: 0 0 0 3px var(--led-open-bg);
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--step0);
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease, transform 0.1s ease;
}

.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover { background: var(--brand-dark); }

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }

.btn-on-dark {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}
.btn-on-dark:hover { background: rgba(255, 255, 255, 0.16); }

.btn:disabled { opacity: 0.55; cursor: not-allowed; }

/* Cabecera */
.site-header {
  background: var(--ink);
  color: #fff;
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 18px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: var(--step1);
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand__dot { color: var(--led-open); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  font-size: var(--step-1);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.site-nav a:hover { color: #fff; }
.site-nav a.is-active { color: #fff; }

/* Pie */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.65);
  margin-top: 96px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding-block: 28px;
  font-size: var(--step-1);
}

.site-footer a { color: rgba(255, 255, 255, 0.75); }
.site-footer a:hover { color: #fff; }

.site-footer__legal {
  max-width: var(--content-width);
  margin-inline: auto;
  padding: 0 24px 28px;
  font-size: var(--step-1);
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.6;
}

/* Utilidades */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}