:root {
  --bg: #0c0e12;
  --surface: #141820;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8eaef;
  --muted: #8b93a7;
  --accent: #3d8bfd;
  --accent-soft: rgba(61, 139, 253, 0.15);
  --radius: 14px;
  --font: "DM Sans", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent);
  pointer-events: none;
  z-index: 0;
}

.container {
  width: min(1100px, 100% - 2rem);
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(12, 14, 18, 0.75);
  backdrop-filter: blur(12px);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 1.25rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--text);
}

.hero {
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.hero__tag {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}

.hero__title {
  margin: 0 0 1.25rem;
  font-size: clamp(1.75rem, 4.5vw, 2.65rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.hero__lead {
  margin: 0 0 2rem;
  max-width: 52ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  filter: brightness(1.08);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
}

.section {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
}

.section__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section__subtitle {
  margin: 0 0 2rem;
  color: var(--muted);
  max-width: 55ch;
}

.section__subtitle code {
  font-size: 0.88em;
  padding: 0.15em 0.4em;
  background: var(--surface);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.card {
  padding: 1.35rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
  border-color: rgba(61, 139, 253, 0.35);
  transform: translateY(-2px);
}

.card__icon {
  display: block;
  margin-bottom: 0.75rem;
  color: var(--accent);
  font-size: 1rem;
}

.card__title {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.card__text {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.55;
}

.links {
  border-block: 1px solid var(--border);
  background: rgba(20, 24, 32, 0.5);
}

.link-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.link-tile {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.35rem 1.25rem;
  text-decoration: none;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, background 0.2s;
}

.link-tile:hover {
  border-color: var(--accent);
  background: rgba(61, 139, 253, 0.06);
}

.link-tile__label {
  font-weight: 600;
  font-size: 1.1rem;
}

.link-tile__hint {
  font-size: 0.9rem;
  color: var(--muted);
}

.contact__inner {
  text-align: center;
  max-width: 560px;
  margin-inline: auto;
}

.contact__text {
  margin: 0 0 1rem;
  color: var(--muted);
}

.contact__note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  margin-top: 2rem;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer__meta {
  opacity: 0.85;
}

@media (max-width: 520px) {
  .nav {
    gap: 0.85rem;
  }

  .nav a {
    font-size: 0.82rem;
  }
}