/* =====================================================================
   BabelStone marketing site styles.

   The brand design tokens below mirror web/src/styles.css (the app's single
   source of truth) so the marketing pages and the product share one palette
   and both react to the same [data-theme] switch. Only add MARKETING layout
   rules here; token *values* should track the app.
   ===================================================================== */
:root {
  --bg: #f2f3f1;
  --surface: #ffffff;
  --surface-2: #f4f5f3;
  --border: #e2e3de;
  --text: #2a343c;
  --muted: #66747e;
  --primary: #3b4a54;
  --primary-700: #2c3940;
  --on-primary: #ffffff;
  --accent: #2c7e7b;
  --accent-700: #246b69;
  --accent-weak: #e1efee;
  --live: #c25b2e;
  --live-weak: #f7e6db;
  --focus: rgba(44, 126, 123, 0.30);
  --radius: 10px;
  --shadow: 0 1px 3px rgba(20, 30, 50, 0.08), 0 1px 2px rgba(20, 30, 50, 0.05);
  --shadow-lg: 0 10px 30px rgba(20, 30, 50, 0.10), 0 2px 8px rgba(20, 30, 50, 0.06);
  --logo-slate: #3e4c57;
  --logo-bevel: #77858e;
  --logo-ink: #6e7c86;
  --logo-babel: #33424d;
  --logo-stone: #2c7e7b;
  color-scheme: light;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
[data-theme="dark"] {
  --bg: #181f24;
  --surface: #232e36;
  --surface-2: #2b3741;
  --border: #38454f;
  --text: #e7ecee;
  --muted: #9ba7af;
  --primary: #4c5c67;
  --primary-700: #5a6b77;
  --on-primary: #f3f6f7;
  --accent: #4fb0aa;
  --accent-700: #63beb8;
  --accent-weak: #1e3a39;
  --live: #e07f49;
  --live-weak: #38281e;
  --focus: rgba(79, 176, 170, 0.40);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.45), 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 34px rgba(0, 0, 0, 0.55), 0 2px 10px rgba(0, 0, 0, 0.4);
  --logo-slate: #5e6e79;
  --logo-bevel: #9ba7af;
  --logo-ink: #3c4a54;
  --logo-babel: #ede7db;
  --logo-stone: #5cb6b0;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--font-sans); line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { color: var(--text); line-height: 1.2; }
img, svg { max-width: 100%; }
.mk-shell { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* Skip link */
.mk-skip {
  position: absolute; left: -9999px; top: 0; background: var(--surface); color: var(--text);
  padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; z-index: 100;
}
.mk-skip:focus { left: 12px; top: 12px; }

/* Header + nav */
.mk-header {
  position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(8px); border-bottom: 1px solid var(--border);
}
.mk-header-inner { display: flex; align-items: center; gap: 18px; min-height: 64px; flex-wrap: wrap; }
.mk-brand { display: inline-flex; align-items: center; line-height: 0; }
.mk-brand:hover { text-decoration: none; }
.mk-logo { display: block; }
.mk-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.mk-navlink { color: var(--muted); padding: 8px 10px; border-radius: 8px; font-size: 15px; }
.mk-navlink:hover { color: var(--text); background: var(--surface-2); text-decoration: none; }
.mk-nav-actions { display: inline-flex; align-items: center; gap: 8px; margin-left: 8px; }
.mk-navtoggle {
  display: none; margin-left: auto; font-size: 22px; line-height: 1; background: none;
  border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 12px; cursor: pointer;
}

/* Dropdown menus (JS-free via <details>) */
.mk-menu { position: relative; }
.mk-menu > summary {
  list-style: none; cursor: pointer; padding: 8px 10px; border-radius: 8px; color: var(--muted);
  display: inline-flex; align-items: center; gap: 5px; font-size: 15px; user-select: none;
}
.mk-menu > summary::-webkit-details-marker { display: none; }
.mk-menu > summary:hover { color: var(--text); background: var(--surface-2); }
.mk-menu[open] > summary { color: var(--text); background: var(--surface-2); }
.mk-caret { font-size: 10px; opacity: 0.7; }
.mk-menu-panel {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 280px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow-lg); padding: 8px;
  display: flex; flex-direction: column; gap: 2px; z-index: 50;
}
.mk-menu-panel a { padding: 9px 11px; border-radius: 8px; color: var(--text); display: flex; flex-direction: column; gap: 1px; }
.mk-menu-panel a:hover { background: var(--surface-2); text-decoration: none; }
.mk-menu-panel a span { font-size: 12.5px; color: var(--muted); }

/* Buttons */
.mk-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px; border-radius: 999px; font-size: 15px; font-weight: 600;
  border: 1px solid var(--primary); background: var(--primary); color: var(--on-primary);
  cursor: pointer; transition: background-color .15s ease, border-color .15s ease, transform .05s ease;
}
.mk-btn:hover { background: var(--primary-700); border-color: var(--primary-700); text-decoration: none; }
.mk-btn:active { transform: translateY(1px); }
.mk-btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.mk-btn.primary:hover { background: var(--accent-700); border-color: var(--accent-700); }
.mk-btn.secondary { background: transparent; color: var(--text); border-color: var(--border); }
.mk-btn.secondary:hover { background: var(--surface-2); }
.mk-btn.lg { padding: 14px 26px; font-size: 16px; }
.mk-btn:disabled { opacity: 0.55; cursor: not-allowed; }
.mk-cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

/* Hero */
.mk-hero { padding: 64px 0 40px; border-bottom: 1px solid var(--border); background: var(--surface); }
.mk-hero-lg {
  padding: 88px 0 64px;
  background:
    radial-gradient(1100px 460px at 78% -10%, var(--accent-weak) 0%, transparent 60%),
    var(--surface);
}
.mk-hero .mk-shell { max-width: 880px; }
.mk-eyebrow {
  margin: 0 0 12px; color: var(--accent); font-weight: 700; font-size: 13px;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.mk-hero h1 { margin: 0; font-size: clamp(30px, 5vw, 50px); font-weight: 700; letter-spacing: -0.02em; }
.mk-lede { margin: 20px 0 0; font-size: clamp(17px, 2.2vw, 20px); color: var(--muted); max-width: 60ch; }

/* Prose + sections */
.mk-section { padding: 44px 0; }
.mk-prose { padding: 40px 24px; max-width: 760px; }
.mk-prose p { font-size: 17px; color: var(--text); }
.mk-section > h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 700; margin: 0 0 24px; letter-spacing: -0.01em; }

/* Card grid */
.mk-grid { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.mk-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow); padding: 24px; display: block;
}
.mk-card h3 { margin: 14px 0 8px; font-size: 18px; font-weight: 700; }
.mk-card p { margin: 0 0 8px; color: var(--muted); font-size: 15.5px; }
.mk-card ul { margin: 10px 0 0; padding-left: 18px; color: var(--muted); font-size: 15px; }
.mk-card-accent {
  display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px;
  border-radius: 12px; background: var(--accent-weak); color: var(--accent);
}
.mk-accent { display: block; }
.mk-card-link { transition: border-color .15s ease, box-shadow .15s ease, transform .1s ease; }
.mk-card-link:hover { border-color: var(--accent); box-shadow: var(--shadow-lg); text-decoration: none; transform: translateY(-2px); }
.mk-card-more { color: var(--accent); font-weight: 600; font-size: 15px; }

/* FAQ accordions */
.mk-faqs { display: flex; flex-direction: column; gap: 10px; max-width: 820px; }
.mk-faq { border: 1px solid var(--border); border-radius: 12px; background: var(--surface); overflow: hidden; }
.mk-faq > summary {
  list-style: none; cursor: pointer; padding: 16px 18px; font-weight: 600; font-size: 16.5px;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.mk-faq > summary::-webkit-details-marker { display: none; }
.mk-faq > summary::after { content: "+"; color: var(--accent); font-size: 22px; line-height: 1; }
.mk-faq[open] > summary::after { content: "\2013"; }
.mk-faq > div { padding: 0 18px 16px; color: var(--muted); }
.mk-faq p { margin: 0; font-size: 16px; }

/* CTA band */
.mk-band { background: var(--accent-weak); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.mk-band-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  padding: 40px 0;
}
.mk-band h2 { margin: 0 0 6px; font-size: clamp(20px, 3vw, 26px); font-weight: 700; }
.mk-band p { margin: 0; color: var(--muted); font-size: 16px; }

/* Footer */
.mk-footer { background: var(--surface); border-top: 1px solid var(--border); margin-top: 8px; }
.mk-footer-grid {
  display: grid; gap: 28px; grid-template-columns: 2fr 1fr 1fr 1fr; padding: 48px 24px 24px;
}
.mk-footer-brand p { color: var(--muted); font-size: 14.5px; max-width: 40ch; margin: 14px 0 0; }
.mk-footer h2 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 4px 0 12px; }
.mk-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.mk-footer a { color: var(--text); font-size: 14.5px; }
.mk-footer a:hover { color: var(--accent); }
.mk-footer-legal {
  border-top: 1px solid var(--border); padding: 18px 24px; color: var(--muted); font-size: 13.5px;
}

/* Demo form */
.mk-form-wrap { padding: 8px 0 56px; }
.mk-form {
  max-width: 640px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; box-shadow: var(--shadow); padding: 28px;
}
.mk-field { margin-bottom: 16px; }
.mk-field label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 6px; font-weight: 600; }
.mk-field input, .mk-field select, .mk-field textarea {
  width: 100%; padding: 11px 13px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface-2); color: var(--text); font-size: 15px; font-family: inherit;
}
.mk-field textarea { resize: vertical; }
.mk-field input:focus, .mk-field select:focus, .mk-field textarea:focus {
  outline: 2px solid var(--focus); border-color: var(--accent); background: var(--surface);
}
.mk-req { color: var(--live); margin-left: 3px; }
.mk-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.mk-altcha { margin: 8px 0 18px; min-height: 46px; }
.mk-form .mk-btn { width: 100%; }
.mk-form-status { margin: 14px 0 0; font-size: 15px; min-height: 1.2em; }
.mk-form-status.ok { color: var(--accent-700); }
.mk-form-status.err { color: var(--live); }

/* Legal */
.mk-legal h2 { font-size: 19px; margin: 26px 0 8px; }
.mk-updated { color: var(--muted); font-size: 14px; }
.mk-note {
  margin-top: 26px; padding: 12px 14px; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 10px; color: var(--muted); font-size: 14px;
}

@media (max-width: 860px) {
  .mk-navtoggle { display: inline-flex; }
  .mk-nav {
    display: none; flex-basis: 100%; flex-direction: column; align-items: stretch; gap: 4px;
    margin: 4px 0 12px;
  }
  .mk-nav.open { display: flex; }
  .mk-navlink { padding: 12px 10px; }
  .mk-menu > summary { padding: 12px 10px; }
  .mk-menu-panel {
    position: static; box-shadow: none; border: none; border-left: 2px solid var(--border);
    border-radius: 0; margin: 2px 0 6px 8px; min-width: 0;
  }
  .mk-nav-actions { margin: 8px 0 0; }
  .mk-nav-actions .mk-btn { flex: 1; }
  .mk-footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .mk-footer-grid { grid-template-columns: 1fr; }
  .mk-band-inner { flex-direction: column; align-items: flex-start; }
}