/* Wijnbladh Consulting — design language adopted from the HomeOS app
   (Material 3, blue palette, light + dark, very rounded, pill buttons).
   Typeface: Google Sans Flex. */

:root {
  /* HomeOS light theme tokens */
  --bg-background: #F5F8FD;
  --bg-surface: #EAF0F8;
  --bg-surface-variant: #DCE5F2;
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-muted: #6B7B94;
  --border-base: #C8D5E6;
  --primary: #1E4A8E;
  --on-primary: #FFFFFF;
  --primary-btn: #1E4A8E;
  --on-primary-btn: #FFFFFF;
  --secondary: #3A5F9A;
  --tertiary: #5C527F;
  --success: #2D8A4E;
  --warning: #D4A017;
  --danger: #B3261E;

  /* Material 3 radii (from HomeOS) */
  --r-lg: 12px;
  --r-xl: 16px;
  --r-2xl: 20px;
  --r-3xl: 28px;
  --radius: var(--r-xl);
  --maxw: 1100px;

  /* Aliases so existing markup + the /book page keep working */
  --bg: var(--bg-background);
  --bg-soft: var(--bg-surface);
  --panel: var(--bg-surface);
  --border: var(--border-base);
  --text: var(--text-primary);
  --muted: var(--text-muted);
  --accent: var(--primary);
  --accent-2: var(--secondary);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* HomeOS dark theme tokens */
    --bg-background: #111827;
    --bg-surface: #1E2433;
    --bg-surface-variant: #283040;
    --text-primary: #FFFFFF;
    --text-secondary: #B0BDD0;
    --text-muted: #7889A0;
    --border-base: #334155;
    --primary: #a8c7fa;
    --on-primary: #0A2A5C;
    --primary-btn: #2E5FAD;
    --on-primary-btn: #E8F0FE;
    --secondary: #8AB4F8;
    --tertiary: #D7AEFB;
    --success: #81c995;
    --warning: #fdd663;
    --danger: #F2B8B5;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Google Sans Flex", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text-primary);
  background: var(--bg-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Header / nav — Material surface bar */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg-surface) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-base);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; color: var(--text-primary); }
.brand:hover { text-decoration: none; }
.logo {
  width: 38px; height: 38px; border-radius: 999px;
  background: var(--primary-btn); color: var(--on-primary-btn);
  display: grid; place-items: center; font-weight: 700; font-size: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}
.brand small { display: block; font-weight: 400; color: var(--text-muted); font-size: 12px; letter-spacing: 0.4px; }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  color: var(--text-secondary); padding: 9px 16px; border-radius: 999px; font-size: 15px; font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.nav-links a:hover { color: var(--text-primary); background: var(--bg-surface-variant); text-decoration: none; }
.nav-links a.active { color: var(--on-primary-btn); background: var(--primary-btn); }

.nav-toggle { display: none; background: var(--bg-surface-variant); border: 1px solid var(--border-base);
  color: var(--text-primary); border-radius: 999px; width: 42px; height: 42px; font-size: 18px; cursor: pointer; }

/* Hero */
.hero { padding: 88px 0 56px; }
.eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 1.2px; text-transform: uppercase; font-weight: 600;
  color: var(--primary); border: 1px solid var(--border-base); padding: 6px 14px; border-radius: 999px;
  background: var(--bg-surface); margin-bottom: 22px;
}
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.06; margin: 0 0 18px; letter-spacing: -1.2px; font-weight: 600; }
.hero h1 .grad { color: var(--primary); }
.lead { font-size: clamp(17px, 2.4vw, 21px); color: var(--text-secondary); max-width: 720px; margin: 0 0 30px; }

.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 24px; border-radius: 999px;
  font-weight: 600; font-size: 15px; cursor: pointer; border: 1px solid transparent;
  transition: transform 0.15s ease, filter 0.15s ease, background-color 0.15s ease;
}
.btn-primary { background: var(--primary-btn); color: var(--on-primary-btn); box-shadow: 0 4px 14px rgba(30,74,142,0.25); }
.btn-primary:hover { text-decoration: none; filter: brightness(1.08); transform: translateY(-1px); }
.btn-ghost { border-color: var(--border-base); color: var(--text-primary); background: var(--bg-surface); }
.btn-ghost:hover { text-decoration: none; background: var(--bg-surface-variant); }

/* Sections */
section { padding: 52px 0; }
.section-title { font-size: clamp(26px, 4vw, 36px); margin: 0 0 12px; letter-spacing: -0.5px; font-weight: 600; }
.section-intro { color: var(--text-secondary); max-width: 720px; margin: 0 0 36px; font-size: 17px; }

/* Cards — Material surface, rounded-xl, soft shadow */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-base); border-radius: var(--r-xl); padding: 26px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(0,0,0,0.12); border-color: var(--primary); }
.card .ico { font-size: 26px; margin-bottom: 12px; }
.card h3 { margin: 0 0 8px; font-size: 19px; font-weight: 600; }
.card p { margin: 0; color: var(--text-secondary); font-size: 15px; }

/* Lists */
.checklist { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 12px; }
.checklist li { padding-left: 30px; position: relative; color: var(--text-secondary); }
.checklist li::before { content: "\2713"; position: absolute; left: 0; top: 0; color: var(--success); font-weight: 700; }

/* Stats */
.stats { display: flex; gap: 40px; flex-wrap: wrap; margin-top: 40px; }
.stat .n { font-size: 32px; font-weight: 700; color: var(--primary); }
.stat .l { color: var(--text-muted); font-size: 14px; }

/* Prose */
.prose { max-width: 760px; }
.prose p { color: var(--text-secondary); margin: 0 0 18px; }
.prose h2 { margin: 36px 0 12px; font-size: 24px; font-weight: 600; color: var(--text-primary); }
.tag-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.tag { font-size: 13px; padding: 7px 14px; border: 1px solid var(--border-base); border-radius: 999px;
  color: var(--text-secondary); background: var(--bg-surface); }

/* Contact */
.contact-card {
  background: var(--bg-surface); border: 1px solid var(--border-base); border-radius: var(--r-xl);
  padding: 32px; max-width: 560px; box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.contact-row { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border-base); }
.contact-row:last-child { border-bottom: none; }
.contact-row .k { color: var(--text-muted); width: 90px; font-size: 14px; }
.contact-row .v { font-weight: 600; }

/* CTA band */
.cta {
  margin: 40px 0; padding: 44px; border-radius: var(--r-2xl); text-align: center;
  background: var(--bg-surface-variant); border: 1px solid var(--border-base);
}
.cta h2 { margin: 0 0 10px; font-size: 28px; font-weight: 600; }
.cta p { color: var(--text-secondary); margin: 0 0 22px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border-base); margin-top: 40px; padding: 32px 0; color: var(--text-muted); font-size: 14px; }
.footer-flex { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 820px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .nav-links { position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; align-items: stretch;
    background: var(--bg-surface); border-bottom: 1px solid var(--border-base); padding: 12px 16px; gap: 4px; display: none; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: inline-grid; place-items: center; }
}