:root {
  --bg: #0a0f1a;
  --bg-alt: #0f1726;
  --text: #e6eaf2;
  --muted: #a8b0c3;
  --card: #0f1522;
  --border: #1e2636;
  --accent-a: #6C63FF;
  --accent-b: #00D4FF;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { width: min(1100px, 92%); margin-inline: auto; }
.section { padding: 4rem 0; }
.section--alt { background: var(--bg-alt); }

.nav { position: sticky; top: 0; z-index: 10; background: rgba(10,15,26,0.8); backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--border); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 0; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-weight: 700; }
.nav__links { display: flex; gap: 1rem; }
.nav__toggle { display: none; }
@media (max-width: 720px) {
  .nav__toggle { display: inline-block; background: transparent; color: var(--text); border: 1px solid var(--border); padding: 0.4rem 0.75rem; border-radius: 8px; }
  .nav__links { display: none; position: absolute; top: 52px; right: 4%; background: var(--bg-alt); border: 1px solid var(--border); padding: 0.75rem; border-radius: 12px; flex-direction: column; }
  .nav__links.open { display: flex; }
}

.hero { padding: 6rem 0 4rem; text-align: center; }
.gradient-bg {
  background: radial-gradient(1000px 500px at 10% -10%, rgba(108,99,255,0.25), transparent 60%),
              radial-gradient(800px 400px at 90% -20%, rgba(0,212,255,0.25), transparent 60%),
              var(--bg);
}
.hero__title { font-size: clamp(2.25rem, 6vw, 4rem); margin: 0; letter-spacing: -0.02em; }
.hero__subtitle { color: var(--muted); margin-top: 0.5rem; font-size: 1.125rem; }
.hero__cta { margin-top: 1.5rem; display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

.subhero { padding: 3rem 0; background: var(--bg-alt); border-bottom: 1px solid var(--border); }

.btn { display: inline-block; padding: 0.7rem 1rem; border: 1px solid var(--border); border-radius: 999px; color: var(--text); transition: transform 0.1s ease, background-color 0.2s ease; }
.btn:hover { transform: translateY(-1px); background: #12192a; }
.btn--primary {
  background: linear-gradient(135deg, var(--accent-a), var(--accent-b));
  border: 0;
}
.btn--primary:hover { filter: brightness(1.06); }

.grid { display: grid; gap: 1rem; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid--3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .grid--3 { grid-template-columns: 1fr; } }

.card { background: var(--card); border: 1px solid var(--border); padding: 1.25rem; border-radius: 16px; box-shadow: 0 10px 40px rgba(0,0,0,0.18); }
.card__icon { color: var(--accent-b); margin-bottom: 0.25rem; }

.split { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2rem; align-items: center; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }

.illustration { border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: 0 10px 40px rgba(0,0,0,0.18); }

.checklist { padding-left: 1.25rem; }
.checklist li { margin: 0.35rem 0; }

.footer { border-top: 1px solid var(--border); background: #0b1220; }
.footer__inner { display: flex; justify-content: space-between; gap: 1rem; padding: 1.25rem 0; color: var(--muted); }
@media (max-width: 720px) { .footer__inner { flex-direction: column; } }
.credit { margin: 0; font-size: 0.85rem; }
.credit--proton { display: none; }
body.theme-proton .credit--proton { display: block; }

.form { max-width: 640px; }
.form__row { display: grid; gap: 0.4rem; margin-bottom: 0.9rem; }
.form input, .form textarea { background: #0b1120; color: var(--text); border: 1px solid var(--border); padding: 0.6rem 0.75rem; border-radius: 10px; }
.form input:focus, .form textarea:focus { outline: 2px solid color-mix(in oklab, var(--accent-b) 40%, transparent); outline-offset: 2px; }

.timeline { display: grid; gap: 0.5rem; padding-left: 1rem; }
.timeline li { list-style: disc; }

/* scroll reveal */
.reveal { opacity: 0; transform: translateY(10px); transition: 400ms ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }