:root {
  --bg: oklch(0.16 0.012 240);
  --bg-elev: oklch(0.20 0.014 240);
  --bg-card: oklch(0.22 0.014 240);
  --border: oklch(0.30 0.015 240);
  --border-strong: oklch(0.42 0.018 240);
  --fg: oklch(0.97 0.004 240);
  --fg-dim: oklch(0.72 0.008 240);
  --fg-faint: oklch(0.52 0.010 240);
  --accent: oklch(0.82 0.18 145);
  --accent-soft: oklch(0.82 0.18 145 / 0.12);
  --accent-2: oklch(0.78 0.17 295);
  --accent-2-soft: oklch(0.78 0.17 295 / 0.14);
  --danger: oklch(0.70 0.20 25);
  --radius: 14px;
  --radius-lg: 20px;
  --font-display: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Inter', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(800px 500px at 85% -10%, oklch(0.82 0.18 var(--accent-h, 145) / 0.10), transparent 60%),
    radial-gradient(700px 420px at -10% 10%, oklch(0.78 0.17 295 / 0.08), transparent 60%);
  z-index: 0;
}
body.grain::after {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  z-index: 1;
}

h1,h2,h3,h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 2;
}

/* ——— NAV ——— */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px);
  background: oklch(0.16 0.012 240 / 0.72);
  border-bottom: 1px solid oklch(0.30 0.015 240 / 0.5);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo {
  font-family: var(--font-display); font-weight: 700; font-size: 18px; letter-spacing: -0.01em;
  display: flex; align-items: center; gap: 10px;
}
.logo-mark {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--accent);
  display: grid; place-items: center;
  color: oklch(0.16 0.012 240); font-weight: 800;
  box-shadow: 0 0 0 1px oklch(0.82 0.18 145 / 0.3), 0 6px 24px oklch(0.82 0.18 145 / 0.35);
}
.nav-links { display: flex; gap: 28px; font-size: 14px; color: var(--fg-dim); }
.nav-links a:hover { color: var(--fg); }
.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-toggle {
  display: inline-flex; padding: 3px; background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: 999px; font-family: var(--font-mono); font-size: 11px;
}
.lang-toggle button { padding: 5px 10px; border-radius: 999px; color: var(--fg-faint); letter-spacing: 0.05em; }
.lang-toggle button.on { background: var(--fg); color: var(--bg); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px;
  border-radius: 999px;
  font-weight: 500; font-size: 14px;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary {
  background: var(--accent); color: oklch(0.16 0.012 240);
  box-shadow: 0 6px 24px oklch(0.82 0.18 145 / 0.25);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 30px oklch(0.82 0.18 145 / 0.40); }
.btn-ghost { border: 1px solid var(--border-strong); color: var(--fg); }
.btn-ghost:hover { border-color: var(--fg); background: var(--bg-elev); }

/* ——— HERO ——— */
.hero { padding: 96px 0 72px; position: relative; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em;
  color: var(--fg-dim);
  padding: 7px 14px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-elev);
}
.hero-eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero h1 {
  font-size: clamp(48px, 7vw, 104px);
  line-height: 0.96;
  margin: 28px 0 24px;
  max-width: 15ch;
  letter-spacing: -0.035em;
}
.hero h1 .accent { color: var(--accent); }
.hero h1 .accent2 { color: var(--accent-2); font-style: italic; font-weight: 500; }

.hero-sub {
  max-width: 58ch;
  color: var(--fg-dim);
  font-size: 18px;
  margin-bottom: 36px;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 56px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  padding: 28px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  max-width: 820px;
}
.hero-stat .num { font-family: var(--font-display); font-size: 34px; font-weight: 600; letter-spacing: -0.03em; }
.hero-stat .lbl { font-size: 12px; color: var(--fg-faint); font-family: var(--font-mono); letter-spacing: 0.04em; text-transform: uppercase; margin-top: 4px; }

/* ——— SECTION ——— */
.section { padding: 96px 0; position: relative; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 56px; flex-wrap: wrap; }
.section-label {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: 10px;
}
.section-label::before { content: ""; width: 20px; height: 1px; background: var(--accent); }
.section-title { font-size: clamp(36px, 4.4vw, 60px); line-height: 1.02; letter-spacing: -0.03em; max-width: 16ch; margin-top: 16px; }
.section-desc { max-width: 44ch; color: var(--fg-dim); font-size: 16px; }

/* ——— SERVICES ——— */
.services {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
}
.service {
  background: var(--bg);
  padding: 36px 32px;
  transition: background 0.2s ease;
  position: relative;
  min-height: 240px;
  display: flex; flex-direction: column;
}
.service:hover { background: var(--bg-elev); }
.service .num { font-family: var(--font-mono); font-size: 11px; color: var(--fg-faint); letter-spacing: 0.08em; }
.service .tag {
  position: absolute; top: 28px; right: 28px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase;
  padding: 3px 8px; border-radius: 4px;
}
.service .tag.ai { background: var(--accent-2-soft); color: var(--accent-2); }
.service .tag.core { background: var(--accent-soft); color: var(--accent); }
.service h3 { font-size: 24px; letter-spacing: -0.015em; margin: 16px 0 12px; }
.service p { color: var(--fg-dim); font-size: 14.5px; line-height: 1.55; }
.service ul { list-style: none; padding: 0; margin: 16px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.service ul li {
  font-family: var(--font-mono); font-size: 11px;
  padding: 3px 8px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 4px;
  color: var(--fg-dim);
}

/* ——— PROCESS ——— */
.process {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.process-step {
  padding: 28px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev);
  position: relative;
}
.process-step .step-num {
  font-family: var(--font-display); font-size: 14px; color: var(--accent);
  letter-spacing: 0.05em;
}
.process-step h4 { font-size: 20px; margin: 16px 0 10px; letter-spacing: -0.015em; }
.process-step p { font-size: 14px; color: var(--fg-dim); }
.process-step .duration { margin-top: 14px; font-family: var(--font-mono); font-size: 11px; color: var(--fg-faint); }

/* ——— STACK ——— */
.stack-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px;
}
.stack-col h4 {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-faint); margin-bottom: 18px;
  padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.stack-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.stack-col li { font-size: 15px; color: var(--fg); display: flex; align-items: center; gap: 10px; }
.stack-col li::before { content: ""; width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }

/* ——— PRICING ——— */
.pricing {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.price-card {
  padding: 36px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
  position: relative;
  display: flex; flex-direction: column;
}
.price-card.featured {
  border-color: var(--accent);
  background: linear-gradient(180deg, oklch(0.82 0.18 145 / 0.06), transparent 60%), var(--bg-elev);
  box-shadow: 0 20px 60px oklch(0.82 0.18 145 / 0.10);
}
.price-card .badge {
  position: absolute; top: -12px; left: 32px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 4px 10px; background: var(--accent); color: var(--bg); border-radius: 4px;
}
.price-card .plan-name { font-family: var(--font-mono); font-size: 12px; color: var(--fg-faint); letter-spacing: 0.08em; text-transform: uppercase; }
.price-card h3 { font-size: 28px; margin: 8px 0 20px; letter-spacing: -0.02em; }
.price-card .range { font-family: var(--font-display); font-size: 38px; font-weight: 600; letter-spacing: -0.03em; }
.price-card .range small { font-size: 14px; color: var(--fg-dim); font-weight: 400; letter-spacing: 0; margin-left: 6px; font-family: var(--font-body); }
.price-card .timeline { color: var(--fg-dim); font-size: 13px; margin-top: 6px; }
.price-card hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.price-card ul { list-style: none; padding: 0; margin: 0 0 28px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.price-card ul li { font-size: 14px; color: var(--fg-dim); display: flex; gap: 10px; }
.price-card ul li::before { content: "→"; color: var(--accent); font-family: var(--font-mono); }

/* ——— AI ESTIMATOR ——— */
.estimator-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, oklch(0.78 0.17 295 / 0.07), transparent 50%), var(--bg-elev);
  overflow: hidden;
}
.estimator-head {
  padding: 24px 32px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 12px; color: var(--fg-dim);
}
.estimator-head .live { display: flex; align-items: center; gap: 8px; }
.estimator-head .live .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 10px var(--accent-2); animation: pulse 2s infinite; }
.estimator-body { padding: 32px; display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.estimator-body label { display: block; font-size: 12px; color: var(--fg-faint); font-family: var(--font-mono); letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 8px; }
.estimator-body textarea, .estimator-body input, .estimator-body select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 14.5px;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s ease;
}
.estimator-body textarea:focus, .estimator-body input:focus, .estimator-body select:focus {
  border-color: var(--accent-2);
}
.estimator-body textarea { min-height: 140px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.chip {
  padding: 7px 12px; border-radius: 999px;
  font-size: 12.5px; font-family: var(--font-mono);
  background: var(--bg); border: 1px solid var(--border);
  color: var(--fg-dim); cursor: pointer;
  transition: all 0.15s ease;
}
.chip:hover { border-color: var(--fg-dim); }
.chip.on { background: var(--accent-2-soft); border-color: var(--accent-2); color: var(--accent-2); }

.estimate-btn {
  margin-top: 20px;
  background: var(--accent-2);
  color: var(--bg);
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 14px;
  display: inline-flex; align-items: center; gap: 8px;
  box-shadow: 0 6px 24px oklch(0.78 0.17 295 / 0.28);
  transition: transform 0.15s ease;
}
.estimate-btn:hover:not(:disabled) { transform: translateY(-1px); }
.estimate-btn:disabled { opacity: 0.6; cursor: wait; }

.estimate-output {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  min-height: 280px;
  display: flex; flex-direction: column;
  font-size: 14px; line-height: 1.6;
}
.estimate-output.empty { color: var(--fg-faint); justify-content: center; align-items: center; text-align: center; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.04em; }
.estimate-output .field-lbl { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-faint); }
.estimate-output .field-val { color: var(--fg); margin-top: 4px; }
.estimate-output .range-big { font-family: var(--font-display); font-size: 30px; font-weight: 600; letter-spacing: -0.02em; color: var(--accent-2); }
.estimate-output hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }
.estimate-output ul { padding-left: 18px; margin: 0; color: var(--fg-dim); }
.estimate-output ul li { margin-bottom: 4px; }

.spinner {
  width: 16px; height: 16px; border: 2px solid oklch(0.16 0.012 240 / 0.3);
  border-top-color: oklch(0.16 0.012 240); border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ——— CONTACT ——— */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: flex-start; }
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.contact-form input, .contact-form textarea, .contact-form select {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  color: var(--fg); font-family: var(--font-body); font-size: 15px;
  outline: none;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { border-color: var(--accent); }
.contact-form textarea { min-height: 140px; resize: vertical; }
.contact-form .field-lbl { font-family: var(--font-mono); font-size: 11px; color: var(--fg-faint); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: -10px; }

.book-card {
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: var(--bg-elev); padding: 32px;
}
.book-card h3 { font-size: 24px; margin-bottom: 8px; }
.book-card p { color: var(--fg-dim); font-size: 14px; margin-bottom: 24px; }
.book-slot {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--border); border-radius: 10px;
  margin-bottom: 8px;
  transition: all 0.15s ease;
  cursor: pointer;
  background: var(--bg);
}
.book-slot:hover { border-color: var(--accent); }
.book-slot.selected { border-color: var(--accent); background: var(--accent-soft); }
.book-slot .date { font-family: var(--font-mono); font-size: 13px; }
.book-slot .time { color: var(--fg-dim); font-size: 13px; font-family: var(--font-mono); }

/* ——— FOOTER ——— */
.footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 40px;
  margin-top: 40px;
}
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
.footer-grid .brand-col { max-width: 320px; }
.footer-grid .brand-col p { color: var(--fg-dim); font-size: 14px; margin-top: 16px; }
.footer-links { display: flex; gap: 56px; font-size: 14px; }
.footer-links .col { display: flex; flex-direction: column; gap: 10px; }
.footer-links .col h5 { font-family: var(--font-mono); font-size: 11px; color: var(--fg-faint); letter-spacing: 0.08em; text-transform: uppercase; font-weight: 500; margin-bottom: 4px; }
.footer-links a { color: var(--fg-dim); }
.footer-links a:hover { color: var(--fg); }
.footer-bottom { display: flex; justify-content: space-between; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); font-family: var(--font-mono); font-size: 12px; color: var(--fg-faint); }

/* ——— TWEAKS PANEL ——— */
.tweaks-panel {
  position: fixed; bottom: 24px; right: 24px; z-index: 100;
  width: 280px;
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  font-size: 13px;
}
.tweaks-panel h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-faint); margin-bottom: 14px; }
.tweak-row { margin-bottom: 14px; }
.tweak-row label { display: block; font-size: 12px; color: var(--fg-dim); margin-bottom: 6px; }
.tweak-swatches { display: flex; gap: 6px; }
.tweak-swatch { width: 28px; height: 28px; border-radius: 8px; cursor: pointer; border: 2px solid transparent; }
.tweak-swatch.on { border-color: var(--fg); }

/* ——— RESPONSIVE ——— */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .container { padding: 0 20px; }
  .services { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr 1fr; }
  .stack-grid { grid-template-columns: 1fr 1fr; }
  .pricing { grid-template-columns: 1fr; }
  .estimator-body { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .section { padding: 64px 0; }
  .hero { padding: 56px 0 48px; }
}