:root {
  --bg: #0b1220;
  --bg-alt: #0f172a;
  --surface: #111a2e;
  --surface-2: #16213b;
  --border: #1f2c47;
  --text: #e6ecf5;
  --muted: #9aa7bd;
  --accent: #5eead4;
  --accent-strong: #2dd4bf;
  --accent-soft: rgba(94, 234, 212, 0.12);
  --warn: #fbbf24;
  --danger: #f87171;
  --ok: #4ade80;
  --max: 1120px;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-lg: 0 30px 60px -30px rgba(0, 0, 0, 0.6);
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
}

h1, h2, h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(2rem, 4.4vw, 3.4rem);
}

h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
}

h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

.eyebrow {
  font-family: var(--font-mono);
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 14px;
}

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

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(140%) blur(10px);
  background: rgba(11, 18, 32, 0.78);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
}

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

.brand-mark {
  font-family: var(--font-mono);
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.brand-name {
  font-size: 1rem;
}

.nav-links {
  display: flex;
  gap: 26px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-cta {
  color: var(--text) !important;
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
}

.nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
}

/* Hero */
.hero {
  padding: 96px 0 72px;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(94, 234, 212, 0.10), transparent 60%),
    radial-gradient(800px 400px at 0% 20%, rgba(94, 234, 212, 0.05), transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero-copy h1 {
  margin-bottom: 20px;
}

.lede {
  font-size: 1.08rem;
  max-width: 52ch;
}

.hero-cta {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  font-family: inherit;
}

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

.btn-primary {
  background: var(--accent);
  color: #06281f;
}

.btn-primary:hover {
  background: var(--accent-strong);
  color: #06281f;
}

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

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

/* Hero code card */
.hero-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot-r { background: #ff5f57; }
.dot-y { background: #febc2e; }
.dot-g { background: #28c840; }

.card-title {
  margin-left: 10px;
  color: var(--muted);
  font-size: 0.78rem;
}

.card-body {
  margin: 0;
  padding: 18px 18px 22px;
  color: #cfe3df;
  overflow-x: auto;
}

.card-body .kw { color: #8b9eff; }
.card-body .str { color: #f0c987; }
.card-body .cmt { color: #6b7a99; }
.card-body .ok { color: var(--ok); }

/* Sections */
.section {
  padding: 88px 0;
  border-top: 1px solid var(--border);
}

.section-alt {
  background: var(--bg-alt);
}

.section-head {
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-lede {
  color: var(--muted);
}

/* Services */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

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

.service h3 {
  color: var(--text);
}

.service p {
  margin: 0;
  font-size: 0.96rem;
}

/* Approach */
.approach-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.principles {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}

.principles li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 0.98rem;
}

.principles strong {
  color: var(--text);
  font-weight: 600;
}

/* About */
.about {
  max-width: 760px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
}

.hint {
  color: var(--muted);
  font-weight: 400;
}

.field input,
.field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 0.98rem;
  padding: 11px 13px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.field textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 4px;
}

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

.form-status.ok {
  color: var(--ok);
}

.form-status.err {
  color: var(--danger);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  background: var(--bg-alt);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-grid > div {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer-meta {
  margin: 0;
  font-size: 0.88rem;
}

/* Focus */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Responsive */
@media (max-width: 920px) {
  .hero {
    padding: 72px 0 56px;
  }
  .hero-grid,
  .approach-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .section {
    padding: 72px 0;
  }
}

@media (max-width: 600px) {
  .nav-links {
    gap: 14px;
  }
  .nav-links li:not(:last-child) {
    display: none;
  }
  .service-grid {
    grid-template-columns: 1fr;
  }
  .hero-cta .btn {
    flex: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}