/* ---------- Design tokens ---------- */
:root {
  --bg: #ffffff;
  --bg-alt: #f5f6f8;
  --text: #14181c;
  --text-muted: #5b6572;
  --border: #e3e6ea;
  --accent: #0e8a7d;
  --accent-contrast: #ffffff;
  --mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-w: 880px;
  --max-w-narrow: 680px;
  --radius: 6px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0d10;
    --bg-alt: #14171b;
    --text: #e7eaed;
    --text-muted: #8b95a1;
    --border: #262b31;
    --accent: #2dd4bf;
    --accent-contrast: #04120f;
  }
}

:root[data-theme="dark"] {
  --bg: #0b0d10;
  --bg-alt: #14171b;
  --text: #e7eaed;
  --text-muted: #8b95a1;
  --border: #262b31;
  --accent: #2dd4bf;
  --accent-contrast: #04120f;
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .15s ease, color .15s ease;
}
h1, h2, h3 { line-height: 1.15; font-weight: 650; letter-spacing: -0.01em; }
p { color: var(--text-muted); }
a { color: var(--text); }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.wrap-narrow { max-width: var(--max-w-narrow); }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin: 0 0 0.75rem;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 64px;
}
.logo {
  font-family: var(--mono);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}
.site-nav {
  display: flex;
  gap: 1.5rem;
  flex: 1;
  justify-content: center;
}
.site-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.site-nav a:hover { color: var(--text); }

#theme-toggle {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 0.35rem 0.65rem;
  cursor: pointer;
}
#theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  padding: 7rem 0 5rem;
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.1rem);
  margin: 0 0 1.25rem;
  max-width: 18ch;
}
.hero .lede {
  font-size: 1.15rem;
  max-width: 56ch;
  margin: 0 0 2.25rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
}
.btn-accent:hover { opacity: 0.9; }

/* ---------- Sections ---------- */
section { padding: 5rem 0; border-bottom: 1px solid var(--border); }
.site-footer { border-bottom: none; padding: 2.5rem 0; }

.about h2, .case-study h2, .contact h2 {
  font-size: 1.8rem;
  margin: 0 0 1rem;
}

/* ---------- Services ---------- */
.grid { display: grid; gap: 1.25rem; margin-top: 1.5rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  background: var(--bg-alt);
}
.card-number {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.85rem;
}
.card h3 { margin: 0.5rem 0 0.6rem; font-size: 1.1rem; }
.card p { margin: 0; font-size: 0.95rem; }

/* ---------- Case study ---------- */
.case-grid { margin-top: 2rem; display: flex; flex-direction: column; gap: 1.5rem; }
.case-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}
.case-row:first-child { border-top: none; padding-top: 0; }
.case-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
}
.case-row p { margin: 0; }
.case-row code {
  font-family: var(--mono);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-size: 0.85em;
  color: var(--text);
}

/* ---------- Stack ---------- */
.stack-group h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 0 0 0.85rem;
  font-weight: 600;
}
.pill-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pill-list li {
  font-family: var(--mono);
  font-size: 0.82rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
}

/* ---------- Contact ---------- */
.contact .btn { margin: 1.5rem 0 0; }
.or-divider {
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 1.75rem 0 1.25rem;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-bottom: 2rem;
}
.form-row { display: flex; flex-direction: column; gap: 0.4rem; }
.form-row label {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.form-row input,
.form-row textarea {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem 0.8rem;
  resize: vertical;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.contact-form .btn {
  align-self: flex-start;
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-contrast);
  cursor: pointer;
  margin: 0;
}
.form-disclaimer {
  font-size: 0.78rem;
  margin: -0.4rem 0 0;
}
.form-disclaimer a { color: var(--accent); }

/* Honeypot: hidden from real users, still reachable by simple bots */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.social-links { display: flex; gap: 1.5rem; }
.social-links a { text-decoration: none; font-size: 0.95rem; }
.social-links a:hover { color: var(--accent); }

/* ---------- Footer ---------- */
.site-footer p {
  font-size: 0.82rem;
  margin: 0;
  text-align: center;
}

/* ---------- Legal pages ---------- */
.legal-page { padding: 5rem 0 6rem; }
.legal-page h1 { font-size: 2rem; margin: 0 0 2rem; }
.legal-page p { margin: 0 0 1.25rem; }
.legal-page strong { color: var(--text); }
.legal-page a { color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .site-nav { display: none; }
  .case-row { grid-template-columns: 1fr; gap: 0.4rem; }
  .hero { padding: 4.5rem 0 3rem; }
  section { padding: 3.5rem 0; }
}