/* Circuit 40s — Shared Components */

/* ══════════════════════════════════════
   NAVIGATION
══════════════════════════════════════ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(245, 244, 241, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
}

.site-header--dark {
  background: rgba(10, 9, 8, 0.96);
  border-bottom-color: var(--dark-border);
}

.nav-container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-logo {
  flex-shrink: 0;
  margin-right: auto;
  display: flex;
  align-items: center;
}

.nav-logo img {
  height: 20px;
  width: auto;
}

/* Product page brand bar */
.nav-product-brand {
  flex-shrink: 0;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-back-link {
  font-size: var(--text-sm);
  color: var(--text-dim);
  transition: color 0.15s;
}

.nav-back-link:hover { color: var(--text-muted); }

.site-header--dark .nav-back-link { color: var(--text-inv-dim); }
.site-header--dark .nav-back-link:hover { color: var(--text-inv-muted); }

.nav-divider {
  font-size: var(--text-sm);
  color: var(--border-strong);
  user-select: none;
}

.site-header--dark .nav-divider { color: var(--dark-border-strong); }

.nav-product-id {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.site-header--dark .nav-product-id { color: var(--text-inv); }

/* Nav links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-right: 24px;
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 450;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-3);
}

.site-header--dark .nav-link { color: var(--text-inv-muted); }
.site-header--dark .nav-link:hover {
  color: var(--text-inv);
  background: var(--dark-raised);
}

/* Products dropdown */
.nav-item { position: relative; }

.nav-item-btn {
  font-size: var(--text-sm);
  font-weight: 450;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  white-space: nowrap;
}

.nav-item-btn:hover {
  color: var(--text);
  background: var(--surface-3);
}

.nav-arrow {
  font-size: 10px;
  transition: transform 0.15s;
  display: inline-block;
}

.nav-item.is-open .nav-arrow { transform: rotate(180deg); }

.site-header--dark .nav-item-btn { color: var(--text-inv-muted); }
.site-header--dark .nav-item-btn:hover {
  color: var(--text-inv);
  background: var(--dark-raised);
}

.nav-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  left: -8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 6px;
  min-width: 240px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.nav-item.is-open .nav-dropdown { display: block; }

.nav-dropdown-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  transition: background 0.1s;
  cursor: pointer;
}

.nav-dropdown-row:hover { background: var(--surface-2); }

.nav-dropdown-tag {
  flex-shrink: 0;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: var(--surface-2);
  color: var(--text-muted);
  padding: 2px 7px;
  border-radius: 3px;
  margin-top: 2px;
  border: 1px solid var(--border);
}

.nav-dropdown-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
}

.nav-dropdown-desc {
  font-size: var(--text-xs);
  color: var(--text-dim);
  margin-top: 1px;
}

/* Nav actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* Hamburger toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 8px 6px;
}

.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: all 0.2s;
  transform-origin: center;
}

.site-header--dark .nav-toggle span { background: var(--text-inv-muted); }

.nav-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-container { padding: 0 20px; }
  .nav-toggle { display: flex; }
  .nav-links { display: none; }
  .nav-links.is-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px 24px;
    gap: 4px;
  }

  .site-header--dark .nav-links.is-open {
    background: var(--dark-surface);
    border-bottom-color: var(--dark-border);
  }

  .nav-link,
  .nav-item-btn {
    padding: 10px 12px;
    width: 100%;
  }

  .nav-dropdown {
    position: static;
    box-shadow: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-top: 4px;
    width: 100%;
  }

  .site-header--dark .nav-dropdown {
    background: var(--dark-raised);
    border-color: var(--dark-border);
  }

  .nav-actions .btn { display: none; }
}


/* ══════════════════════════════════════
   BUTTONS
══════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
  border-radius: var(--radius-md);
  transition: background 0.18s, color 0.18s, border-color 0.18s;
  cursor: pointer;
  text-decoration: none;
  padding: 10px 18px;
  border: 1px solid transparent;
  letter-spacing: 0.01em;
}

.btn-sm { padding: 7px 14px; font-size: var(--text-xs); }
.btn-lg { padding: 13px 26px; font-size: var(--text-base); }

/* Dark fill — primary action on light backgrounds */
.btn-primary {
  background: #0f0e0d;
  color: #ede9e3;
  border-color: #0f0e0d;
}
.btn-primary:hover {
  background: #2a2826;
  border-color: #2a2826;
}

/* Light fill — primary action on dark backgrounds */
.btn-light {
  background: #ede9e3;
  color: #0f0e0d;
  border-color: #ede9e3;
}
.btn-light:hover {
  background: #dddbd5;
  border-color: #dddbd5;
}

/* Accent — Circuit red, use sparingly for critical emphasis */
.btn-accent {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent-dark);
}
.btn-accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

/* Outline (on light) */
.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-outline:hover {
  background: var(--surface-2);
  border-color: var(--text-dim);
}

/* Ghost (on light) */
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--surface-2);
  color: var(--text);
}

/* Ghost on dark */
.btn-ghost-inv {
  background: transparent;
  color: var(--text-inv-muted);
  border-color: transparent;
}
.btn-ghost-inv:hover {
  background: var(--graphite-raised);
  color: var(--text-inv);
}

/* Outline on dark */
.btn-outline-inv {
  background: transparent;
  color: var(--text-inv);
  border-color: var(--dark-border-strong);
}
.btn-outline-inv:hover {
  background: var(--dark-raised);
  border-color: var(--text-inv-dim);
}

/* Dark fill */
.btn-dark {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.btn-dark:hover {
  background: #2a2826;
  border-color: #2a2826;
}


/* ══════════════════════════════════════
   FOOTER
══════════════════════════════════════ */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
  background: var(--bg);
}

.site-footer--dark {
  background: var(--dark);
  border-top-color: var(--dark-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-logo { height: 18px; width: auto; }

.footer-copy {
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.site-footer--dark .footer-copy { color: var(--text-inv-dim); }

.footer-links {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--text-dim);
  transition: color 0.15s;
}

.footer-links a:hover { color: var(--text-muted); }

.site-footer--dark .footer-links a { color: var(--text-inv-dim); }
.site-footer--dark .footer-links a:hover { color: var(--text-inv-muted); }

@media (max-width: 640px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
}


/* ══════════════════════════════════════
   SHARED SECTION PATTERNS
══════════════════════════════════════ */

.section {
  padding: 100px 0;
}

.section--lg {
  padding: 140px 0;
}

.section--sm {
  padding: 64px 0;
}

.section--dark {
  background: var(--dark);
  color: var(--text-inv);
}

.section--surface {
  background: var(--surface);
}

.section--surface-2 {
  background: var(--surface-2);
}

/* Product badge */
.product-badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  margin-bottom: 24px;
}

.product-badge--inv {
  background: var(--dark-raised);
  border-color: var(--dark-border);
  color: var(--text-inv-muted);
}

/* Page hero shared patterns */
.hero-eyebrow {
  margin-bottom: 20px;
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--text-muted);
  margin-top: 20px;
  line-height: 1.6;
}

.hero-sub--inv {
  color: var(--text-inv-muted);
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

/* Divider lines */
.hr-rule {
  border: none;
  border-top: 1px solid var(--border);
  margin: 80px 0;
}

.hr-rule--dark {
  border-top-color: var(--dark-border);
}

@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .section--lg { padding: 88px 0; }
}