/* TriSeek docs — shared site styles
   Linked from every HTML page BEFORE its inline <style> block, so
   page-specific rules can still override.

   Holds:
     - Standardized responsive breakpoints
     - Top nav (logo, links, CSS-only burger drawer for ≤860px)
     - Container padding tweaks for small viewports
     - Generic responsive helpers (.responsive-table-wrap, iframe/anim-frame max-width)
     - Mobile code-block sizing
*/

:root {
  --bp-mobile: 640px;
  --bp-nav: 860px;
  --bp-tablet: 1024px;
}

/* ----- top nav ----- */

/* hidden checkbox driving the CSS-only burger drawer */
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }

.top-nav {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(10,14,23,0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border, #1e2d42);
  z-index: 100;
  padding: 0.6rem 2rem;
  display: flex; align-items: center; gap: 2rem;
}

.top-nav .logo {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.9rem;
  background: linear-gradient(135deg, var(--accent-cyan, #22d3ee), var(--accent-green, #34d399));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  flex-shrink: 0;
}

.top-nav .nav-links {
  display: flex; align-items: center;
  gap: 1.75rem;
  margin-left: auto;
}

.top-nav a {
  color: var(--text-dim, #4a5c74);
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.2s;
  font-family: 'JetBrains Mono', monospace;
}

.top-nav a:hover,
.top-nav a.active { color: var(--accent-cyan, #22d3ee); }

/* burger button — hidden on desktop, shown ≤860px */
.nav-burger {
  display: none;
  margin-left: auto;
  width: 2.5rem; height: 2.5rem;
  cursor: pointer;
  align-items: center; justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--border-bright, #2a4060);
  border-radius: 6px;
  background: rgba(20, 28, 43, 0.9);
  flex-shrink: 0;
}
.nav-burger:hover { border-color: var(--accent-cyan, #22d3ee); }
.nav-burger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-primary, #e2e8f0);
  transition: transform 0.2s ease, opacity 0.2s ease;
  border-radius: 1px;
}

/* ----- mobile / narrow tablet: burger drawer ----- */
@media (max-width: 860px) {
  .top-nav { padding: 0.6rem 1rem; gap: 1rem; }
  .nav-burger { display: flex; }

  /* Nav-links becomes a vertical drawer below the nav bar */
  .top-nav .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10,14,23,0.97);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border, #1e2d42);
    padding: 0.5rem 0;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.25s ease, visibility 0s linear 0.25s;
  }
  .top-nav .nav-links a {
    padding: 0.85rem 1.25rem;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border, #1e2d42);
  }
  .top-nav .nav-links a:last-child { border-bottom: none; }

  /* triseek-architecture.html has a second link group (.section-links —
     in-page anchors). Hide it from the mobile bar so it doesn't crowd the
     burger; the cross-page nav-links drawer is enough on mobile. */
  .top-nav .section-links { display: none !important; }

  /* When the toggle is checked, reveal the drawer.
     The toggle sits as a sibling of <nav>. */
  .nav-toggle:checked ~ .top-nav .nav-links {
    max-height: 80vh;
    overflow-y: auto;
    visibility: visible;
    transition: max-height 0.25s ease, visibility 0s linear 0s;
  }
  /* Animate burger into an X when open */
  .nav-toggle:checked ~ .top-nav .nav-burger span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .nav-toggle:checked ~ .top-nav .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .top-nav .nav-burger span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ----- container side padding scales down on phones ----- */
@media (max-width: 640px) {
  .container { padding-left: 1rem; padding-right: 1rem; }
}
@media (max-width: 380px) {
  .container { padding-left: 0.75rem; padding-right: 0.75rem; }
}

/* ----- generic responsive helpers ----- */

/* Wrap tables in <div class="responsive-table-wrap"> to avoid page-level horizontal scroll. */
.responsive-table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Animation/iframe embeds clamp to their container. */
.anim-frame, .anim-wrap, iframe { max-width: 100%; }

/* ----- mobile typography for code/pre ----- */
@media (max-width: 640px) {
  pre, code, .code-block, .terminal-body { font-size: 0.78rem; }
  .code-block pre { padding: 1rem; }
}