:root {
  --bg: #060b1f;
  --bg-soft: #101938;
  --surface: #131d3d;
  --surface-2: #1a2750;
  --text: #eaf0ff;
  --text-muted: #b5c1e6;
  --primary: #73a1ff;
  --primary-dark: #4e7ee6;
  --ring: rgba(115, 161, 255, 0.55);
  --border: rgba(170, 190, 255, 0.24);
  --shadow: 0 12px 30px rgba(3, 8, 30, 0.35);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: radial-gradient(circle at top right, #132b6b 0%, var(--bg) 45%);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--primary);
  color: #00143f;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background-color: rgba(6, 11, 31, 0.72);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.5rem;
  gap: 1rem;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.02em;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 0.55rem 0.8rem;
  border-radius: 0.6rem;
  font-weight: 600;
}

.menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.4rem;
}

.menu a {
  color: var(--text-muted);
  font-weight: 500;
}

.menu a:hover,
.menu a:focus-visible {
  color: var(--text);
}

.hero {
  padding: 5.5rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 2rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0 0 0.8rem;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  max-width: 16ch;
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
}

.lead {
  color: var(--text-muted);
  max-width: 55ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.68rem 1rem;
  border-radius: 0.72rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.btn:focus-visible,
.menu-toggle:focus-visible,
.menu a:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--primary);
  color: #0a1d4d;
  box-shadow: 0 10px 20px rgba(22, 61, 166, 0.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #f8fbff;
}

.btn-secondary {
  border-color: var(--border);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.hero-card {
  padding: 1.4rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: linear-gradient(
    180deg,
    rgba(24, 39, 81, 0.95) 0%,
    rgba(18, 29, 61, 0.95) 100%
  );
  box-shadow: var(--shadow);
}

.hero-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.section {
  padding: 4rem 0;
}

.section p {
  color: var(--text-muted);
  max-width: 70ch;
}

.section-alt {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-heading {
  margin-bottom: 1.4rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 0.95rem;
  padding: 1.15rem;
  box-shadow: var(--shadow);
}

.project-card p {
  margin: 0;
}

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 700px) {
  .menu-toggle {
    display: inline-flex;
  }

  .menu {
    display: none;
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 4%;
    min-width: 12rem;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem;
    border-radius: 0.8rem;
    border: 1px solid var(--border);
    background: var(--surface-2);
    box-shadow: var(--shadow);
  }

  .menu.is-open {
    display: flex;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}