/* THEME */
:root {
  --bg: #000;
  --fg: #fff;
  --line: #444;
  --muted: #bdbdbd;
  --accent: #39ff14;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  --bar-h: 44px;
  --bar-b: 44px;
  --transition: 180ms ease;
  --masonry-row-height: 4px;
}
:root[data-theme="light"] {
  --bg: #fff;
  --fg: #000;
  --line: #d0d0d0;
  --muted: #4b4b4b;
}

/* RESET */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  line-height: 1.35;
  transition: background-color var(--transition), color var(--transition);
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 120ms linear, background-color 120ms linear, opacity 120ms linear;
}
a:hover { color: var(--accent); }

.hairline { border-color: var(--line); }
.hairline-b { border-bottom: 1px solid var(--line); }
.hairline-t { border-top: 1px solid var(--line); }

/* TOP BAR */
.topbar {
  position: fixed;
  z-index: 50;
  top: 0; left: 0; right: 0;
  height: var(--bar-h);
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 16px;
  background: rgba(0,0,0,0);
  padding: 0 10px;
  pointer-events: none;
}
.topbar > * { pointer-events: auto; }

.brand {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.2px;
  user-select: none;
  position: relative;
  white-space: nowrap;
}
.brand .short,
.brand .long {
  display: inline-block;
  transition: opacity 140ms ease, transform 160ms ease, color 100ms linear;
}
.brand .long {
  opacity: 0;
  transform: translateY(2px);
  position: absolute;
  left: 0;
}
.brand:hover .short { opacity: 0; transform: translateY(-2px); color: var(--accent); }
.brand:hover .long { opacity: 1; transform: translateY(0); color: var(--accent); }

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
  align-items: center;
}
.toggle {
  position: relative;
  width: 48px;
  height: 22px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.toggle-track {
  display: flex;
  align-items: stretch;
  width: 100%;
  height: 100%;
  border: 1px solid var(--line);
  background: var(--bg);
  transition: background-color var(--transition), border-color var(--transition);
}
.toggle-thumb {
  flex: 0 0 50%;
  height: 100%;
  margin: 0;
  background: var(--fg);
  border: none;
  border-radius: 0;
  box-shadow: inset 0 0 0 1px var(--line);
  transition: margin-left var(--transition), background-color var(--transition), box-shadow var(--transition);
}
.toggle.is-light .toggle-track {
  background: var(--fg);
  border-color: var(--fg);
}
.toggle.is-light .toggle-thumb {
  background: var(--bg);
  box-shadow: inset 0 0 0 1px var(--bg);
  margin-left: 50%;
}

/* BOTTOM BAR */
.bottombar {
  position: fixed;
  z-index: 50;
  left: 0; right: 0; bottom: 0;
  min-height: var(--bar-b);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  padding: 8px 10px;
  background: rgba(0,0,0,0);
}
.filter {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.filter-label {
  display: inline-flex;
  align-items: center;
  opacity: 0.7;
}
.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-btn {
  position: relative;
  padding: 6px 12px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  border: 1px solid var(--line);
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform 140ms ease;
}
.filter-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  pointer-events: none;
  transition: border-color var(--transition);
}
.filter-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}
.filter-btn:focus-visible {
  outline: none;
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}
.filter-btn.is-active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.filter-btn.is-active::after {
  border-color: var(--bg);
}

/* PANELS */
.panel-wrap {
  position: sticky;
  top: var(--bar-h);
  z-index: 30;
}
.panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.panel.open { max-height: 300px; }
.panel-inner {
  padding: 14px 10px;
  font-size: 14px;
  color: var(--muted);
}

/* GRID */
.grid-wrap {
  padding-top: var(--bar-h);
  padding-bottom: var(--bar-b);
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-auto-flow: dense;
  grid-auto-rows: var(--masonry-row-height);
  gap: 0;
  padding: 0;
  align-items: start;
}
@media (max-width: 1200px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 900px)  { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px)  { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 400px)  { .grid { grid-template-columns: 1fr; } }

.card {
  position: relative;
  background: var(--bg);
  overflow: hidden;
  transition: filter 160ms ease;
}
.card:hover { filter: brightness(1.05); }
@media (max-width: 900px) {
  .card { grid-column: span 1 !important; }
}
.card img {
  display: block;
  width: 100%;
  height: auto;
  background: #111;
}
.card .overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.55);
  color: #fff;
  font-size: 12px;
  padding: 6px 8px;
  opacity: 0;
  transition: opacity 120ms linear;
  pointer-events: none;
}
:root[data-theme="light"] .card .overlay {
  background: rgba(0,0,0,0.6);
  color: #fff;
}
.card:hover .overlay { opacity: 1; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--line); }
::-webkit-scrollbar-track { background: transparent; }