/* Shared tokens + chrome primitives.
   Callout banner + concept picker injected via _chrome.js. Nav is per-concept.
   Glass-morphic material philosophy: blur + faint tints + edge-teal top hairlines. */

:root {
  --ink: #000000;
  --ink-soft: #3D4F5C;
  --paper: #F7F9FA;
  --pane: #FFFFFF;
  --glass-tint: #E3EDF1;
  --edge: #0F8B83;
  --edge-deep: #0A6660;
  --edge-light: #9FE8E0;
  --signal: #E8590C;
  --line: #D2DDE2;
  --line-soft: #E8EEF1;

  --font-display: 'Barlow Condensed', -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Barlow', -apple-system, 'Segoe UI', sans-serif;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --banner-h: 34px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--pane);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ==========================================================================
   Callout banner — thin ink strip, fixed at very top of every concept
   ========================================================================== */
.callout-banner {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--banner-h);
  background: var(--ink);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0 20px;
}
.callout-banner__sep { color: rgba(255, 255, 255, 0.24); font-weight: 400; }
@media (max-width: 620px) {
  .callout-banner { font-size: 10px; letter-spacing: 0.14em; gap: 10px; }
  .callout-banner__item.is-hide-mobile { display: none; }
}

/* ==========================================================================
   Concept picker — dev-only, bottom-left
   ========================================================================== */
.concept-strip {
  position: fixed;
  bottom: 12px;
  left: 12px;
  z-index: 100;
  display: flex;
  gap: 4px;
  padding: 5px;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #fff;
  border-radius: 8px;
  font-size: 10px;
  font-family: var(--font-body);
  font-weight: 500;
}
.concept-strip a {
  padding: 4px 9px;
  border-radius: 5px;
  color: rgba(255, 255, 255, 0.7);
  transition: all 150ms var(--ease);
  text-decoration: none;
  white-space: nowrap;
}
.concept-strip a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.concept-strip a.is-active { color: var(--ink); background: #fff; }
@media (max-width: 780px) { .concept-strip { display: none; } }

/* ==========================================================================
   Buttons — matched to Brandon's reference screenshot:
   uppercase Barlow Condensed, 8px radius, ~46px tall, letter-spacing 0.14em
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 14px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 200ms var(--ease);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}
.btn:active { transform: scale(0.98); }
.btn svg { flex-shrink: 0; }

.btn--white {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}
.btn--white:hover { background: var(--edge); border-color: var(--edge); color: #fff; }

.btn--ink {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.btn--ink:hover { background: #000; border-color: #000; }

.btn--edge {
  background: var(--edge);
  color: #fff;
  border-color: var(--edge);
}
.btn--edge:hover { background: var(--edge-deep); border-color: var(--edge-deep); }

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

.btn--ghost-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.32);
}
.btn--ghost-light:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.06);
}

.btn--sm { padding: 10px 16px; font-size: 12px; }
.btn--lg { padding: 16px 26px; font-size: 14px; }

/* ==========================================================================
   Eyebrow / label
   ========================================================================== */
.eyebrow {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--edge);
  display: inline-flex;
  align-items: center;
  gap: 14px;
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: currentColor;
}

/* ==========================================================================
   Glass-morphic primitives — the "window glass" material
   ========================================================================== */
.glass {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(22px) saturate(170%);
  -webkit-backdrop-filter: blur(22px) saturate(170%);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  position: relative;
  transition: background 250ms var(--ease), border-color 250ms var(--ease);
}
.glass::before {
  content: '';
  position: absolute;
  top: -1px; left: 14px; right: 14px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(159, 232, 224, 0.55), transparent);
  opacity: 0;
  transition: opacity 250ms var(--ease);
}
.glass:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.22);
}
.glass:hover::before { opacity: 1; }

.glass--light {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line-soft);
  color: var(--ink);
}
.glass--light::before {
  background: linear-gradient(90deg, transparent, rgba(15, 139, 131, 0.55), transparent);
}
.glass--light:hover {
  background: rgba(255, 255, 255, 0.94);
  border-color: rgba(15, 139, 131, 0.28);
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.stars {
  color: #F5B800;
  font-size: 15px;
  letter-spacing: 3px;
}
.sep-dot {
  display: inline-block;
  width: 4px; height: 4px;
  background: currentColor;
  opacity: 0.4;
  border-radius: 50%;
  vertical-align: middle;
}