@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0a0c;
  --surface: #111114;
  --surface2: #18181c;
  --border: #2a2a30;
  --border-hi: #3a3a44;
  --text: #c8c8d0;
  --text-dim: #68687a;
  --text-bright: #e8e8f0;
  --accent: #ff3366;
  --accent2: #00eeff;
  --accent3: #aaff44;
  --danger: #ff4444;
  --green: #44ff88;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  height: 100%;
  overflow: hidden;
}

.app {
  display: grid;
  grid-template-columns: 1fr 340px;
  grid-template-rows: auto 1fr auto;
  height: 100vh;
  gap: 0;
}

/* HEADER */
.header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.logo {
  font-family: 'Space Mono', monospace;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--text-bright);
}
.logo span { color: var(--accent); }
.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* BUTTONS */
button {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  padding: 7px 14px;
  cursor: pointer;
  transition: all 0.15s;
}
button:hover {
  border-color: var(--border-hi);
  color: var(--text-bright);
  background: #1e1e24;
}
button.active, button.primary { border-color: var(--accent); color: var(--accent); }
button.accent2 { border-color: var(--accent2); color: var(--accent2); }
button.small { padding: 4px 8px; font-size: 10px; }
button.icon-btn { padding: 5px 8px; font-size: 14px; line-height: 1; font-weight: 400; }
button.danger:hover { border-color: var(--danger); color: var(--danger); }

/* CANVAS AREA */
.canvas-area {
  position: relative;
  overflow: hidden;
  background:
    repeating-conic-gradient(var(--surface) 0% 25%, var(--bg) 0% 50%) 0 0 / 20px 20px;
  border-right: 1px solid var(--border);
  cursor: grab;
}
.canvas-area:active { cursor: grabbing; }
.canvas-area canvas {
  position: absolute;
  top: 0; left: 0;
  image-rendering: auto;
  transform-origin: 0 0;
  box-shadow: 0 0 60px rgba(255, 51, 102, 0.05), 0 0 2px rgba(0,0,0,0.8);
}

.drop-zone {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  z-index: 10;
}
.drop-zone .icon { font-size: 48px; color: var(--accent); opacity: 0.5; }
.drop-zone.dragover {
  background: rgba(255, 51, 102, 0.05);
  border: 2px dashed var(--accent);
}
.drop-zone.hidden { display: none; }

.zoom-indicator {
  position: absolute;
  bottom: 10px;
  left: 10px;
  font-size: 10px;
  color: var(--text-dim);
  background: rgba(10,10,12,0.75);
  padding: 3px 8px;
  letter-spacing: 1px;
  z-index: 5;
  pointer-events: none;
}

/* SIDEBAR */
.sidebar {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  overflow: hidden;
}
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sidebar-header h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--text-dim);
  font-weight: 600;
}

.stack-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}
.stack-list::-webkit-scrollbar { width: 4px; }
.stack-list::-webkit-scrollbar-track { background: transparent; }
.stack-list::-webkit-scrollbar-thumb { background: var(--border); }

.stack-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  opacity: 0.6;
}

/* EFFECT CARD */
.fx-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  margin-bottom: 6px;
  transition: border-color 0.15s, opacity 0.15s;
  position: relative;
}
.fx-card:hover { border-color: var(--border-hi); }
.fx-card.dragging { opacity: 0.4; }
.fx-card.drag-over { border-color: var(--accent2); }
.fx-card.disabled { opacity: 0.4; }

.fx-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  user-select: none;
}
.fx-drag-handle {
  color: var(--text-dim);
  font-size: 10px;
  flex-shrink: 0;
  width: 16px;
  text-align: center;
  cursor: grab;
}
.fx-drag-handle:active { cursor: grabbing; }

.fx-name {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}
.fx-badge {
  font-size: 9px;
  padding: 2px 5px;
  border: 1px solid;
  letter-spacing: 1px;
  font-weight: 600;
  flex-shrink: 0;
}
.fx-card-actions {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}
.fx-card-body {
  padding: 6px 10px 10px 34px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.fx-card.collapsed .fx-card-body { display: none; }

/* PARAM ROW */
.param-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.param-label {
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  width: 70px;
  flex-shrink: 0;
}
.param-row input[type="range"] {
  flex: 1;
  height: 3px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
.param-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px;
  background: var(--accent);
  border: none;
  cursor: pointer;
}
.param-row input[type="range"]::-moz-range-thumb {
  width: 12px; height: 12px;
  background: var(--accent);
  border: none;
  cursor: pointer;
}
.param-value {
  font-size: 10px;
  color: var(--accent2);
  width: 32px;
  text-align: right;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.param-row select {
  flex: 1;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 3px 6px;
  cursor: pointer;
}

/* ADD EFFECT PANEL */
.add-panel {
  border-top: 1px solid var(--border);
  padding: 10px;
  flex-shrink: 0;
}
.add-panel select {
  width: 100%;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 7px 10px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* STATUS BAR */
.status-bar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.status-bar .render-time { color: var(--accent3); }
.status-bar .live-dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  margin-right: 5px;
  animation: pulse 1.5s infinite;
}
.status-bar .live-dot.paused { background: var(--danger); animation: none; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

@media (max-width: 800px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr 1fr auto;
  }
  .canvas-area { border-right: none; border-bottom: 1px solid var(--border); }
}