@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500&family=IBM+Plex+Sans:wght@300;400;500&display=swap');

:root {
  --bg: #1a1a1a;
  --panel: #232323;
  --panel2: #2a2a2a;
  --border: #333333;
  --border2: #3d3d3d;
  --accent: #4d9fff;
  --accent2: #aaff44;
  --text: #d4d4d4;
  --muted: #555;
  --hover: #2f2f2f;
  --active: #383838;

  --tl-brush: #4d9fff;
  --tl-eraser: #888888;
  --tl-fill: #ffaa44;
  --tl-ai: #aa44ff;
  --timeline-track-height: 42px;
}

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

body {
  margin: 0;
  display: grid;
  grid-template-columns: 56px 1fr 250px;
  grid-template-rows: 36px 1fr auto;
  height: 100vh;
  background: var(--bg);
  font-family: 'IBM Plex Sans', sans-serif;
  color: var(--text);
  overflow: hidden;
}

#topbar {
  grid-column: 1 / 4;
  grid-row: 1;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 6px;
}

#topbar .app-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-right: 8px;
}

.top-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 12px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color 0.15s, background 0.15s;
}
.top-btn:hover { color: var(--text); background: var(--hover); }
.top-btn svg { width: 14px; height: 14px; stroke: currentColor; }

#toolbar {
  grid-column: 1;
  grid-row: 2;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0;
  gap: 4px;
}

.tool-btn {
  width: 40px;
  height: 40px;
  border-radius: 7px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: all 0.12s;
}
.tool-btn svg { width: 19px; height: 19px; stroke: currentColor; }
.tool-btn:hover { background: var(--hover); color: var(--text); }
.tool-btn.selected { background: var(--active); border-color: var(--accent); color: var(--accent); }

.tool-sep {
  width: 24px;
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

#canvas-area {
  grid-column: 2;
  grid-row: 2;
  background: #141414;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

#canvas-area canvas {
  display: block;
  box-shadow: 0 0 0 1px #333, 0 8px 32px rgba(0,0,0,0.6);
}

#controls {
  grid-column: 3;
  grid-row: 2;
  background: var(--panel);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}

.panel-section {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}

#sketch-panel {
  margin-top: 4px;
}

.section-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

#color-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
}

.color-btn {
  aspect-ratio: 1;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.1s, border-color 0.1s;
}
.color-btn:hover { transform: scale(1.08); }
.color-btn.selected { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }

.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.slider-row input[type=range] {
  flex: 1;
  height: 4px;
  accent-color: var(--accent);
  cursor: pointer;
}
.slider-val {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  min-width: 40px;
  text-align: right;
}

.action-btn {
  width: 100%;
  padding: 8px 10px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  cursor: pointer;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  text-align: left;
  transition: all 0.12s;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.action-btn svg { width: 14px; height: 14px; stroke: currentColor; flex-shrink: 0; }
.action-btn:hover { background: var(--hover); border-color: var(--border2); }
.action-btn:last-of-type { margin-bottom: 0; }

#rec-info {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.8;
  margin-top: 8px;
}
#rec-info span { color: var(--text); }
#step-display { color: var(--accent2) !important; }

#ai-model {
  width: 100%;
  padding: 7px 8px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  cursor: pointer;
  margin-bottom: 8px;
  outline: none;
}
#ai-model:focus { border-color: var(--accent); }

#timeline-bar {
  grid-column: 1 / 4;
  grid-row: 3;
  background: #111;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 4px 16px 6px;
  gap: 4px;
  position: relative;
  min-height: 90px;
}

#ai-player-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 32px;
}

.ai-main-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 9px;
  color: #e6edf7;
  cursor: pointer;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.35);
  transition: transform 0.12s, border-color 0.12s;
}
.ai-main-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(255,255,255,0.35);
}
.ai-main-btn.start { background: linear-gradient(180deg, #2d5bb8, #244892); }
.ai-main-btn.stop { background: linear-gradient(180deg, #55585f, #43464c); }
.ai-main-btn svg { width: 16px; height: 16px; stroke: currentColor; }

#ai-player-center #ai-status {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  line-height: 1;
  color: var(--accent2);
  padding: 6px 8px;
  border-radius: 7px;
  border: 1px solid rgba(170,255,68,0.24);
  background: rgba(170,255,68,0.08);
}

.tl-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tl-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}

#tl-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--accent2);
}

.tl-track {
  position: relative;
  height: var(--timeline-track-height);
  overflow-x: auto;
  overflow-y: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(to bottom, #101010, #0c0c0c);
  border-radius: 5px;
}

#tl-icons {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  width: max-content;
  min-width: 100%;
  pointer-events: auto;
  z-index: 12;
}

.tl-step {
  height: 33px;
  width: 33px;
  min-width: 33px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.75;
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.12s, opacity 0.12s, box-shadow 0.12s;
}
.tl-step svg { width: 20px; height: 20px; stroke: currentColor; }
.tl-step:hover { opacity: 1; transform: translateY(-1px); }
.tl-step.active { opacity: 1; box-shadow: 0 0 0 1px rgba(255,255,255,0.35) inset; }

.tl-step.brush  { background: rgba(77,159,255,0.25); color: var(--tl-brush); border: 1px solid rgba(77,159,255,0.4); }
.tl-step.eraser { background: rgba(136,136,136,0.2); color: var(--tl-eraser); border: 1px solid rgba(136,136,136,0.3); }
.tl-step.fill   { background: rgba(255,170,68,0.2); color: var(--tl-fill); border: 1px solid rgba(255,170,68,0.35); }
.tl-step.ai     { background: rgba(170,68,255,0.25); color: var(--tl-ai); border: 1px solid rgba(170,68,255,0.4); }

#timeline {
  display: none;
}

#tl-cursor {
  position: absolute;
  top: 50%;
  bottom: auto;
  width: 3px;
  height: 68%;
  background: linear-gradient(180deg, rgba(255,255,255,0.0), rgba(170,255,68,0.85), rgba(255,255,255,0.0));
  opacity: 0;
  border-radius: 999px;
  transform: translate(-50%, -50%);
  transform-origin: center;
  box-shadow:
    0 0 10px rgba(170,255,68,0.55),
    0 0 18px rgba(170,255,68,0.25);
  pointer-events: none;
  z-index: 20;
  transition: left 0.05s, opacity 0.12s, transform 0.12s;
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }