/* ========================================
   Alexis Chartier — Portfolio Identity
   "Blueprint Engineer" — Amber/Charcoal
   ======================================== */

:root {
  --amber: #f59e0b;
  --amber-light: #fbbf24;
  --amber-dim: #b45309;
  --amber-glow: rgba(245, 158, 11, 0.15);
  --charcoal-950: #08080a;
  --charcoal-900: #0c0c0f;
  --charcoal-850: #111114;
  --charcoal-800: #16161a;
  --charcoal-700: #1e1e24;
  --charcoal-600: #2a2a32;
  --charcoal-500: #3a3a44;
  --warm-gray: #a8a29e;
  --warm-gray-dim: #78716c;
}

/* Reduced motion — respect user preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus visible — keyboard navigation indicator */
:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
  border-radius: 2px;
}
a:focus-visible, button:focus-visible {
  outline-offset: 3px;
  border-radius: 4px;
}

/* Text selection — theme-aware */
::selection { background: rgba(245, 158, 11, 0.25); color: #fbbf24; }
::-moz-selection { background: rgba(245, 158, 11, 0.25); color: #fbbf24; }

/* Scroll progress bar */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0;
  height: 2px; z-index: 60;
  background: var(--amber);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.1s ease-out;
  opacity: 0.6;
  pointer-events: none;
}

/* Reveal on scroll (subtle) */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Image hover (subtle scale) */
.img-hover { overflow: hidden; border-radius: 6px; }
.img-hover img {
  transition: transform 0.4s ease, filter 0.4s ease;
  cursor: zoom-in;
  display: block;
}
.img-hover:hover img { transform: scale(1.02); }

/* Link underline grow */
.link-underline {
  background-image: linear-gradient(var(--amber), var(--amber));
  background-size: 0 1px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size 0.3s ease;
  text-decoration: none;
}
.link-underline:hover { background-size: 100% 1px; }

/* ASCII diagram horizontal scroll on mobile */
.bracket-card.pre-card { overflow-x: auto; }
.bracket-card.pre-card::-webkit-scrollbar { height: 4px; }
.bracket-card.pre-card::-webkit-scrollbar-thumb { background: var(--charcoal-600); border-radius: 2px; }

/* Card hover lift (subtle) */
.card-lift { transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease; }
.card-lift:hover { transform: translateY(-2px); }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--charcoal-900);
  color: var(--warm-gray);
  -webkit-font-smoothing: antialiased;
}

.font-display { font-family: 'Space Grotesk', system-ui, sans-serif; }
.font-mono { font-family: 'JetBrains Mono', 'SF Mono', Consolas, monospace; }

/* Blueprint grid background */
.blueprint-grid {
  background-image:
    linear-gradient(rgba(245, 158, 11, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 158, 11, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Corner brackets */
.bracket-card {
  position: relative;
}
.bracket-card::before,
.bracket-card::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--amber);
  border-style: solid;
  opacity: 0;
  transition: opacity 0.3s ease, width 0.3s ease, height 0.3s ease;
}
.bracket-card::before {
  top: -1px; left: -1px;
  border-width: 1px 0 0 1px;
}
.bracket-card::after {
  bottom: -1px; right: -1px;
  border-width: 0 1px 1px 0;
}
.bracket-card:hover::before,
.bracket-card:hover::after {
  opacity: 1;
  width: 20px;
  height: 20px;
}

/* Blinking cursor */
@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}
.cursor-blink::after {
  content: '_';
  color: var(--amber);
  animation: blink 1s infinite;
  margin-left: 2px;
}

/* Fade up animation */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.fade-up-d1 { animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.1s forwards; opacity: 0; }
.fade-up-d2 { animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards; opacity: 0; }
.fade-up-d3 { animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards; opacity: 0; }
.fade-up-d4 { animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards; opacity: 0; }

/* Glow pulse */
@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--amber-glow); }
  50% { box-shadow: 0 0 0 6px transparent; }
}
.glow-pulse { animation: glowPulse 2s ease-in-out infinite; }

/* Status dot pulse (open to work) */
@keyframes statusPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5); }
  50% { box-shadow: 0 0 0 6px rgba(74, 222, 128, 0); }
}
.status-pulse { animation: statusPulse 1.8s ease-in-out infinite; }

/* Nav link active indicator */
.nav-link { position: relative; }
.nav-link::before {
  content: '';
  position: absolute;
  left: 0; top: 50%; transform: translateY(-50%);
  width: 2px; height: 0;
  background: var(--amber);
  transition: height 0.3s ease;
}
.nav-link.active::before, .nav-link:hover::before { height: 100%; }
.nav-link.active { color: var(--amber); }

/* Tech chip */
.tech-chip {
  display: inline-flex;
  align-items: center;
  font-size: 0.8125rem;
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  background: rgba(245, 158, 11, 0.06);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--amber);
  padding: 0.2rem 0.7rem;
  border-radius: 4px;
  transition: all 0.2s ease;
}
.tech-chip:hover {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.4);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--charcoal-950); }
::-webkit-scrollbar-thumb { background: var(--charcoal-600); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--amber); }

/* Section divider */
.section-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.section-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--charcoal-600), transparent);
}

/* Status bar */
.status-bar {
  background: var(--charcoal-950);
  border-bottom: 1px solid var(--charcoal-700);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--warm-gray-dim);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  display: inline-block;
}

/* ASCII art divider */
.ascii-divider {
  font-family: 'JetBrains Mono', monospace;
  color: var(--charcoal-600);
  font-size: 0.7rem;
  letter-spacing: -1px;
  white-space: pre;
  text-align: center;
  margin: 2rem 0;
  overflow: hidden;
}

/* ========================================
   Keyboard Navigation — Command Palette
   ======================================== */

/* Kbd base style */
kbd {
  font-family: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  font-size: 0.6875rem;
  line-height: 1;
  padding: 0.2rem 0.4rem;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 4px;
  color: var(--amber);
  display: inline-block;
  min-width: 1.4rem;
  text-align: center;
  box-shadow: 0 1px 0 rgba(245, 158, 11, 0.1);
}
kbd.kbd-mod {
  font-size: 0.6875rem;
}
.kbd-plus {
  color: var(--warm-gray-dim);
  font-size: 0.65rem;
  margin: 0 1px;
}

/* Nav link kbd hint */
.kbd-nav-hint {
  position: absolute;
  right: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.6rem !important;
  padding: 0.1rem 0.3rem;
  background: rgba(245, 158, 11, 0.06);
  border: 1px solid rgba(245, 158, 11, 0.15);
  color: rgba(245, 158, 11, 0.4);
  border-radius: 3px;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.nav-link:hover .kbd-nav-hint,
.nav-link.active .kbd-nav-hint {
  opacity: 1;
}

/* Sidebar trigger hint */
.kbd-trigger-hint {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--warm-gray-dim);
  padding: 0.5rem 0;
  text-align: center;
  opacity: 0.6;
  transition: opacity 0.3s ease;
}
.kbd-trigger-hint:hover {
  opacity: 1;
  color: var(--amber);
}

/* Status bar trigger (project pages) */
.kbd-status-trigger {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  opacity: 0.5;
  transition: opacity 0.2s ease;
}
.kbd-status-trigger:hover {
  opacity: 1;
}

/* Command palette overlay */
.kbd-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 9999;
  background: rgba(8, 8, 10, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}
.kbd-overlay.kbd-open {
  display: flex;
  animation: kbdFadeIn 0.15s ease-out;
}
@keyframes kbdFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Palette */
.kbd-palette {
  width: 90%;
  max-width: 520px;
  background: var(--charcoal-850);
  border: 1px solid var(--charcoal-600);
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(245, 158, 11, 0.08);
  overflow: hidden;
  animation: kbdSlideIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes kbdSlideIn {
  from { opacity: 0; transform: translateY(-16px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Input */
.kbd-input-wrap {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--charcoal-700);
  gap: 0.75rem;
}
.kbd-search-icon {
  color: var(--warm-gray-dim);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.kbd-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--warm-gray);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
}
.kbd-input::placeholder {
  color: var(--warm-gray-dim);
  opacity: 0.5;
}
.kbd-esc {
  flex-shrink: 0;
  font-size: 0.6rem;
  padding: 0.15rem 0.35rem;
}

/* Results */
.kbd-results {
  max-height: 360px;
  overflow-y: auto;
  padding: 0.4rem;
}
.kbd-results::-webkit-scrollbar {
  width: 4px;
}
.kbd-results::-webkit-scrollbar-thumb {
  background: var(--charcoal-600);
  border-radius: 2px;
}

.kbd-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.12s ease;
}
.kbd-item:hover, .kbd-item.kbd-active {
  background: rgba(245, 158, 11, 0.08);
}
.kbd-item-label {
  color: var(--warm-gray);
  font-size: 0.875rem;
  font-weight: 500;
  flex-shrink: 0;
}
.kbd-item.kbd-active .kbd-item-label {
  color: var(--amber);
}
.kbd-item-hint {
  color: var(--warm-gray-dim);
  font-size: 0.75rem;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.kbd-cat {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.6rem;
  text-transform: uppercase;
  color: var(--warm-gray-dim);
  background: var(--charcoal-700);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  flex-shrink: 0;
}
.kbd-shortcut {
  flex-shrink: 0;
  font-size: 0.6rem;
  padding: 0.15rem 0.35rem;
  opacity: 0.5;
}
.kbd-item.kbd-active .kbd-shortcut {
  opacity: 1;
}

.kbd-empty {
  padding: 1.5rem;
  text-align: center;
  color: var(--warm-gray-dim);
  font-size: 0.85rem;
}

/* Footer */
.kbd-footer {
  display: flex;
  gap: 1.5rem;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--charcoal-700);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  color: var(--warm-gray-dim);
}
.kbd-footer span {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.kbd-footer kbd {
  font-size: 0.55rem;
  padding: 0.1rem 0.25rem;
  min-width: auto;
}

/* ========================================
   Lightbox — click to zoom image
   ======================================== */

.lightbox-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 10000;
  background: rgba(8, 8, 10, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: zoom-out;
}
.lightbox-overlay.open {
  display: flex;
  animation: kbdFadeIn 0.2s ease-out;
}
.lightbox-img {
  max-width: 90vw;
  max-height: 88vh;
  border-radius: 8px;
  border: 1px solid var(--charcoal-600);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(245, 158, 11, 0.1);
  animation: kbdSlideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  object-fit: contain;
}
.lightbox-caption {
  position: fixed;
  bottom: 1.5rem; left: 0; right: 0;
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--warm-gray-dim);
  pointer-events: none;
}
.lightbox-close {
  position: fixed;
  top: 1rem; right: 1.5rem;
  color: var(--warm-gray-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem;
  cursor: pointer;
  transition: color 0.2s ease;
  user-select: none;
}
.lightbox-close:hover { color: var(--amber); }
.lightbox-svg {
  display: none;
  max-width: 92vw;
  max-height: 88vh;
  border-radius: 8px;
  border: 1px solid var(--charcoal-600);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6), 0 0 0 1px rgba(245, 158, 11, 0.1);
  animation: kbdSlideIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  background: var(--charcoal-850);
  padding: 2rem;
  overflow: auto;
  cursor: auto;
}
.lightbox-svg svg {
  max-width: none;
}

/* ========================================
   Mermaid Diagrams
   ======================================== */

.mermaid {
  display: flex;
  justify-content: center;
  background: var(--charcoal-850);
  border: 1px solid var(--charcoal-700);
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  cursor: zoom-in;
  transition: border-color 0.2s ease;
}
.mermaid:hover {
  border-color: var(--amber);
}
.mermaid svg {
  max-width: 100%;
  height: auto;
}

/* ========================================
   Code Blocks (manual syntax highlighting)
   ======================================== */

.code-block {
  background: var(--charcoal-850);
  border: 1px solid var(--charcoal-700);
  border-radius: 8px;
  padding: 1.25rem;
  font-family: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--warm-gray);
  overflow-x: auto;
  white-space: pre;
}
.code-block .kw { color: var(--amber); font-weight: 500; }
.code-block .type { color: var(--amber-light); }
.code-block .str { color: #a3e635; }
.code-block .cmt { color: var(--warm-gray-dim); font-style: italic; }
.code-block .num { color: var(--amber-light); }
.code-block .fn { color: #93c5fd; }

/* ========================================
   Scroll-to-Top Button
   ======================================== */

.scroll-top-btn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--charcoal-850);
  border: 1px solid var(--charcoal-600);
  color: var(--warm-gray-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, color 0.2s ease, border-color 0.2s ease;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
}
.scroll-top-btn.visible {
  opacity: 1;
  pointer-events: auto;
}
.scroll-top-btn:hover {
  color: var(--amber);
  border-color: var(--amber);
}

/* ========================================
   Page Fade-In
   ======================================== */

@keyframes pageFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
body { animation: pageFadeIn 0.25s ease-out; }

/* ========================================
   Mermaid Zoom Indicator
   ======================================== */

.mermaid { position: relative; }
.mermaid::after {
  content: '\1F50D';
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font-size: 0.7rem;
  opacity: 0;
  transition: opacity 0.2s ease;
  pointer-events: none;
}
.mermaid:hover::after {
  opacity: 0.4;
}