:root {
  --bg: #020617;
  --surface: rgba(15, 23, 42, 0.55);
  --border: rgba(148, 163, 184, 0.12);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --shadow: 0 24px 60px rgba(0,0,0,.25);
}
:root.light {
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: rgba(148, 163, 184, 0.25);
  --text: #0f172a;
  --muted: #475569;
  --shadow: 0 16px 40px rgba(15, 23, 42, .05);
}
*,
*::before,
*::after { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(circle at top, #1f2937 0, #020617 40%, #000 100%);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}
.container {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.site-header {
  position: sticky;
  top: 0;
  background: rgba(2,6,23,.5);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(148, 163, 184, .08);
  z-index: 50;
}
.nav {
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__logo {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -.02em;
}
.nav__menu {
  display: flex;
  gap: 1rem;
  align-items: center;
}
.nav__link {
  text-decoration: none;
  color: var(--muted);
  font-size: .9rem;
}
.nav__link:hover,
.nav__link.active { color: var(--text); }
.nav__btn {
  background: var(--accent);
  color: #020617;
  padding: .45rem .9rem;
  border-radius: 9999px;
  font-weight: 600;
}
.nav__toggle {
  display: none;
  background: none;
  border: none;
  flex-direction: column;
  gap: .3rem;
}
.nav__toggle span {
  width: 1.5rem;
  height: 2px;
  background: var(--text);
}
.hero {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 3rem;
  padding: 3.5rem 0 3rem;
  align-items: center;
}
.hero__tag {
  background: rgba(56, 189, 248, .1);
  border: 1px solid rgba(56, 189, 248, .5);
  border-radius: 9999px;
  padding: .3rem .7rem;
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 1rem;
}
.hero h1 {
  font-size: clamp(2.4rem, 4vw, 3rem);
  margin-bottom: .7rem;
}
.hero__sub {
  color: var(--muted);
  max-width: 33rem;
}
.hero__actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.2rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: .9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn--primary {
  background: var(--accent);
  color: #020617;
  padding: .6rem 1.2rem;
  box-shadow: 0 12px 30px rgba(56,189,248,.35);
}
.btn--ghost {
  background: rgba(148, 163, 184, .05);
  border: 1px solid rgba(148, 163, 184, .2);
  color: var(--text);
  padding: .6rem 1rem;
}
.hero__meta {
  display: flex;
  gap: 1.4rem;
  margin-top: 1.5rem;
}
.hero__num { font-weight: 700; }
.hero__label { display: block; font-size: .65rem; color: var(--muted); }
.hero__card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.stack-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  display: grid;
  gap: .4rem;
  color: var(--muted);
}
.section {
  padding: 2.5rem 0 2.5rem;
}
.section__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.section__head p { color: var(--muted); }
.grid {
  display: grid;
  gap: 1.25rem;
}
.services-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1rem;
  box-shadow: var(--shadow);
}
.brand-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}
.brand-grid--big {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.brand-card {
  background: rgba(15, 23, 42, .35);
  border: 1px solid rgba(148, 163, 184, .18);
  border-radius: 1rem;
  padding: .9rem 1rem;
  text-align: center;
  font-weight: 600;
}
.cta-card {
  background: radial-gradient(circle at center, rgba(56,189,248,.12), rgba(2,6,23,0));
  border: 1px solid rgba(56,189,248,.3);
  border-radius: 1rem;
  padding: 1.5rem 1.5rem 1.6rem;
  text-align: center;
}
.page {
  padding: 3.5rem 0 3rem;
  flex: 1;
}
.page__header {
  margin-bottom: 2rem;
}
.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}
.list {
  padding-left: 1.1rem;
  color: var(--muted);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 2rem;
}
.form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.5rem;
}
.form label {
  display: block;
  margin-bottom: 1rem;
  font-size: .85rem;
}
.form input,
.form textarea {
  width: 100%;
  margin-top: .4rem;
  padding: .6rem .7rem;
  border-radius: .6rem;
  border: 1px solid rgba(148, 163, 184, .25);
  background: rgba(15, 23, 42, .25);
  color: var(--text);
}
.form textarea { resize: vertical; }
.form-status { font-size: .75rem; color: var(--muted); margin-top: .7rem; }
.site-footer {
  padding: 1.4rem 0 2.4rem;
  margin-top: auto;
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  color: var(--muted);
  font-size: .75rem;
}
.footer__links a {
  color: var(--muted);
  text-decoration: none;
  font-size: .7rem;
}
.theme-toggle {
  background: rgba(148, 163, 184, .1);
  border: 1px solid rgba(148, 163, 184, .12);
  border-radius: 9999px;
  padding: .3rem .6rem;
  cursor: pointer;
}
.scroll-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  background: rgba(2,6,23,.5);
  border: 1px solid rgba(148, 163, 184, .2);
  border-radius: 9999px;
  width: 36px;
  height: 36px;
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--text);
  cursor: pointer;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .nav__menu {
    position: absolute;
    top: 4rem;
    right: 1.5rem;
    background: rgba(2,6,23,.97);
    border: 1px solid rgba(148, 163, 184, .1);
    border-radius: 1rem;
    padding: 1rem;
    display: none;
    flex-direction: column;
    gap: .7rem;
  }
  .nav__menu.show { display: flex; }
  .nav__toggle { display: flex; }
  .contact-grid { grid-template-columns: 1fr; }
}