:root {
  --bg: #000000;
  --fg: #ffffff;
  --muted: #b5b5b5;
  --accent: #00d0ff;
  --border: #1e1e1e;
  --maxw: 1040px;
  --radius: 16px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Montserrat", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans";
  line-height: 1.55;
  letter-spacing: 0.2px;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(8px);
  background: rgba(0,0,0,0.6);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--fg);
  font-weight: 800;
}
.brand-909 { font-size: 28px; color: var(--accent); letter-spacing: 1px; }
.brand-small { font-size: 12px; opacity: 0.9; }
.nav a { margin-left: 18px; color: var(--fg); text-decoration: none; opacity: 0.9; }
.nav a:hover, .cta-link { color: var(--accent); }

/* Hero */
.hero {
  position: relative;
  display: grid;
  place-items: center;
  padding: 120px 0 96px;
  overflow: hidden;
}
.hero-inner { text-align: center; }
.hero-title { font-size: clamp(34px, 6vw, 72px); margin: 0 0 8px; letter-spacing: 1px; }
.hero-subtitle { margin: 0 0 24px; color: var(--muted); }
.hero-bg {
  position: absolute;
  inset: auto -10vw -6vw -10vw;
  font-size: 40vw;
  line-height: 0.8;
  color: rgba(255,255,255,0.02);
  font-weight: 800;
  pointer-events: none;
}

/* Sections */
.section { padding: 72px 0; border-top: 1px solid var(--border); }
.section--alt { background: #070707; }
.section-title { font-size: 24px; margin: 0 0 16px; }
.lead { font-size: 18px; color: var(--fg); margin: 0 0 10px; }
.bullets { margin: 12px 0 0 18px; color: var(--muted); }
.steps { margin: 12px 0 0 18px; color: var(--fg); }
.muted { color: var(--muted); }

/* Layout */
.grid { display: grid; gap: 28px; grid-template-columns: 1fr; }
@media (min-width: 880px) {
  .grid { grid-template-columns: 1.2fr 0.8fr; align-items: start; }
}

/* Card */
.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  background: #0a0a0a;
}
.card-eyebrow {
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 6px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  font-size: 12px;
}
.card-title { margin: 0 0 6px; font-size: 20px; }
.card-text { margin: 0; color: var(--muted); }

/* Form */
.form { display: grid; gap: 16px; max-width: 680px; }
.field { display: grid; gap: 8px; }

/* Inputs uniformes (excepto checkbox) */
.form input:not([type="checkbox"]),
.form select,
.form textarea {
  background: #0d0d0d;
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 12px 14px;
  border-radius: 10px;
  outline: none;
  appearance: none;
}
.form input::placeholder,
.form textarea::placeholder { color: #8a8a8a; }

.form input:not([type="checkbox"]):focus,
.form select:focus,
.form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,208,255,0.15);
}

/* Checkbox layout */
.checkbox { grid-template-columns: 20px 1fr; align-items: start; }
.checkbox input { margin-top: 3px; }

/* Autofill (Chrome/Safari) */
input:-webkit-autofill,
textarea:-webkit-autofill,
select:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 1000px #0d0d0d inset !important;
  -webkit-text-fill-color: var(--fg) !important;
  caret-color: var(--fg);
}

/* Buttons */
.btn {
  display: inline-block;
  border-radius: 999px;
  padding: 12px 22px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #00131a; }
.btn-primary:hover { filter: brightness(1.05); }

/* Notes & Toast */
.form-note { font-size: 12px; color: var(--muted); }
.toast {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 10px;
  background: #0f2a30;
  color: #d8fbff;
  border: 1px solid #144a55;
}

/* Footer */
.site-footer { border-top: 1px solid var(--border); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.backtop { color: var(--accent); text-decoration: none; }