:root {
  --bg: #0b0f14;
  --bg-alt: #10161d;
  --surface: #141c25;
  --border: #232e3a;
  --text: #e7edf3;
  --text-muted: #94a3b3;
  --accent: #4fd1c5;
  --accent-strong: #2dd4bf;
  --accent-contrast: #05171a;
  --radius: 12px;
  --max-width: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  gap: 32px;
  margin-left: auto;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

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

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

.btn-primary:hover {
  background: var(--accent-strong);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
}

.btn-small {
  padding: 9px 18px;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.btn-small:hover {
  border-color: var(--accent);
}

/* Hero */

.hero {
  padding: 120px 0 96px;
  background:
    radial-gradient(circle at 15% 20%, rgba(79, 209, 197, 0.14), transparent 45%),
    radial-gradient(circle at 85% 0%, rgba(79, 209, 197, 0.08), transparent 40%);
}

.hero-inner {
  max-width: 760px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0 0 20px;
}

.hero h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 0 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Sections */

.section {
  padding: 96px 0;
}

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.section-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 0 48px;
}

/* Services grid */

.grid {
  display: grid;
  gap: 24px;
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(79, 209, 197, 0.1);
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.card h3 {
  font-size: 1.1rem;
  margin: 0 0 10px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* About */

.about-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 64px;
  align-items: start;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.02rem;
}

.about-stats {
  display: grid;
  gap: 24px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Contact */

.contact-inner {
  max-width: 640px;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
}

.contact-email {
  display: inline-block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 28px;
  word-break: break-all;
}

.contact-email:hover {
  text-decoration: underline;
}

.contact-details {
  display: grid;
  gap: 18px;
  margin: 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.contact-details div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-details dt {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.contact-details dd {
  margin: 0;
  font-size: 0.98rem;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
}

/* Responsive */

@media (max-width: 900px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 720px) {
  .nav,
  .btn-small {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header.nav-open .nav {
    display: flex;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 16px;
  }

  .hero {
    padding: 80px 0 64px;
  }

  .section {
    padding: 64px 0;
  }
}

@media (max-width: 520px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
}