:root {
  --color-bg: #0a0e17;
  --color-bg-elevated: #111827;
  --color-bg-card: #151d2e;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-accent: #f5a623;
  --color-accent-hover: #ffc04d;
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
  --container: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  font-size: 1.125rem;
}

.logo-icon {
  width: 2rem;
  height: 2rem;
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.nav-cta {
  padding: 0.5rem 1.125rem;
  background: var(--color-accent);
  color: var(--color-bg) !important;
  border-radius: 8px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--color-accent-hover);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: var(--transition);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 6rem 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black, transparent);
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: rgba(59, 130, 246, 0.15);
  top: -100px;
  right: -100px;
}

.glow-2 {
  width: 400px;
  height: 400px;
  background: rgba(245, 166, 35, 0.08);
  bottom: 0;
  left: -100px;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-lead {
  font-size: 1.1875rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 3.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn-large {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.stat-value {
  font-size: 0.9375rem;
  font-weight: 600;
}

/* Sections */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3.5rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-lead {
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

/* Cards */
.services {
  background: var(--color-bg-elevated);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-2px);
}

.card-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.card p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Expertise */
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.expertise-group {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.expertise-group h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.tech-list {
  list-style: none;
}

.tech-list li {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  padding: 0.5rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.tech-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* Approach */
.approach {
  background: var(--color-bg-elevated);
}

.approach-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.approach-text h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.approach-text p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  font-size: 1.0625rem;
}

.schema-visual {
  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
}

.schema-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--color-primary), #2563eb);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
  z-index: 2;
  box-shadow: var(--shadow);
}

.schema-dim {
  position: absolute;
  width: 80px;
  height: 48px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 500;
  z-index: 2;
}

.dim-1 { top: 0; left: 50%; transform: translateX(-50%); }
.dim-2 { top: 50%; right: 0; transform: translateY(-50%); }
.dim-3 { bottom: 0; left: 50%; transform: translateX(-50%); }
.dim-4 { top: 50%; left: 0; transform: translateY(-50%); }

.schema-lines {
  position: absolute;
  inset: 0;
  color: var(--color-primary);
}

.diagram-caption {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 1.5rem;
  font-family: var(--font-mono);
}

/* Contact */
.contact-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  background: linear-gradient(135deg, var(--color-bg-card), var(--color-bg-elevated));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem;
}

.contact-content {
  flex: 1;
  min-width: 280px;
}

.contact-content h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.contact-content p {
  color: var(--color-text-muted);
  max-width: 480px;
}

.contact-action {
  text-align: center;
}

.contact-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.footer-copy {
  grid-column: 1 / -1;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* Mobile nav */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 0.75rem 1.5rem;
  }

  .nav-cta {
    margin: 0.5rem 1.5rem 0;
    text-align: center;
  }

  .approach-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-card {
    padding: 2rem;
    flex-direction: column;
    text-align: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }
}