/* ---- tokens ------------------------------------------------------------ */
:root {
  --bg: #ffffff;
  --bg-elev: #f6f7f9;
  --border: #e3e6ea;
  --text: #14171a;
  --text-muted: #5b6470;
  --accent: #4f46e5;
  --accent-contrast: #ffffff;
  --radius: 12px;
  --maxw: 960px;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.05), 0 8px 24px rgb(0 0 0 / 0.06);
}

:root[data-theme="dark"] {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --border: #262d36;
  --text: #e8ecf1;
  --text-muted: #9aa4b2;
  --accent: #8b85ff;
  --accent-contrast: #0e1116;
  --shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 8px 24px rgb(0 0 0 / 0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1116;
    --bg-elev: #161b22;
    --border: #262d36;
    --text: #e8ecf1;
    --text-muted: #9aa4b2;
    --accent: #8b85ff;
    --accent-contrast: #0e1116;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.4), 0 8px 24px rgb(0 0 0 / 0.35);
  }
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.1em 0.35em;
}

a { color: inherit; }

/* ---- header ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 2rem);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 1.5rem);
}

.site-header nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.15s ease;
}

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

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  border-radius: 999px;
  width: 34px;
  height: 34px;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.theme-toggle:hover { border-color: var(--accent); transform: rotate(20deg); }

/* ---- layout ------------------------------------------------------------ */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2rem);
}

.hero {
  padding: clamp(3rem, 10vw, 6rem) 0 clamp(2rem, 6vw, 4rem);
}

.eyebrow {
  margin: 0 0 1rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.lede {
  margin: 0;
  max-width: 46ch;
  color: var(--text-muted);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, opacity 0.15s ease, border-color 0.15s ease;
}

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

.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { opacity: 0.9; }

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

.section {
  padding: clamp(2.5rem, 8vw, 4.5rem) 0;
  border-top: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 1.5rem;
  font-size: clamp(1.4rem, 3.5vw, 1.9rem);
  letter-spacing: -0.02em;
}

.prose { max-width: 60ch; color: var(--text-muted); margin: 0 0 1.5rem; }

/* ---- cards ------------------------------------------------------------- */
.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}

.card-icon { font-size: 1.5rem; }
.card h3 { margin: 0.6rem 0 0.4rem; font-size: 1.05rem; }
.card p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }

/* ---- stats ------------------------------------------------------------- */
.stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.stats li {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
}

.stats strong { display: block; font-size: 1.6rem; letter-spacing: -0.02em; }
.stats span { color: var(--text-muted); font-size: 0.85rem; }

/* ---- form -------------------------------------------------------------- */
.contact-form {
  display: grid;
  gap: 1rem;
  max-width: 460px;
}

.contact-form label { display: grid; gap: 0.35rem; font-size: 0.9rem; font-weight: 600; }

.contact-form input,
.contact-form textarea {
  font: inherit;
  font-weight: 400;
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.65rem 0.8rem;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}

.contact-form .btn { justify-self: start; }

.form-status { margin: 0; font-size: 0.9rem; min-height: 1.4em; color: var(--text-muted); }
.form-status.error { color: #d33; }
.form-status.ok { color: var(--accent); }

/* ---- footer ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  padding: 2rem clamp(1rem, 4vw, 2rem);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer p { margin: 0; }

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