CSS style.css

/* ═════════════════════════════════════════════════════════════════════
   MechBase PLC — Studio 5000 Minimalist Theme
   ═════════════════════════════════════════════════════════════════════ */

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

:root {
  --chrome-bg: #2b2b2b;
  --chrome-bg-light: #3c3c3c;
  --chrome-bg-lighter: #4a4a4a;
  --chrome-border: #555;
  --chrome-text: #e0e0e0;
  --chrome-text-dim: #999;
  --chrome-accent: #1a6dd4; /* Studio Blue */
  --chrome-accent-hover: #5aa0e9;
  
  --canvas-bg: #ffffff;
  --canvas-grid: #f0f0f0;
  
  --green: #2ecc40;
  --red: #e74c3c;
  --yellow: #f0a030;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--chrome-bg);
  color: var(--chrome-text);
  font-size: 12px;
  user-select: none;
}

/* ── Ribbon (Top Bar) ─────────────────────────────────────────────── */
.ribbon {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 44px;
  padding: 0 16px;
  background: linear-gradient(180deg, #3a3a3a 0%, #2b2b2b 100%);
  border-bottom: 1px solid #555;
  flex-shrink: 0;
}

.ribbon-brand h1 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.ribbon-brand .ver {
  color: var(--chrome-accent);
  font-weight: 600;
}

.ribbon-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  background: var(--chrome-bg-light);
  border-radius: 3px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
}

.status-dot.running {
  background: var(--green);
  box-shadow: 0 0 4px var(--green);
}

.ribbon-btn {
  padding: 5px 14px;
  border: 1px solid var(--chrome-border);
  border-radius: 3px;
  background: var(--chrome-bg-light);
  color: var(--chrome-text);
  font-size: 11px;
  cursor: pointer;
}

.ribbon-btn.run-btn.running {
  background: var(--red);
  border-color: var(--red);
}

/* ── Instruction Palette ────────────────────────────────────────── */
.palette {
  display: flex;
  align-items: center;
  height: 40px;
  padding: 0 8px;
  gap: 6px;
  background: var(--chrome-bg-light);
  border-bottom: 1px solid var(--chrome-border);
  flex-shrink: 0;
}

.palette-item {
  width: 60px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: grab;
  background: rgba(255,255,255,0.05);
  color: var(--chrome-accent);
}

.palette-item:hover {
  border-color: var(--chrome-accent);
  background: rgba(26, 109, 212, 0.15);
}

/* ── Workspace ──────────────────────────────────────────────────── */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.project-tree {
  width: 200px;
  background: var(--chrome-bg-light);
  border-right: 1px solid var(--chrome-border);
  padding: 8px;
  overflow-y: auto;
}

.tree-net {
  padding: 4px 8px;
  font-size: 11px;
  color: var(--chrome-text-dim);
  cursor: pointer;
  border-radius: 2px;
}

.tree-net.active {
  color: var(--chrome-accent);
  background: rgba(26, 109, 212, 0.1);
}

/* ── Ladder Area ────────────────────────────────────────────────── */
.ladder-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.ladder-toolbar {
  padding: 4px 10px;
  background: var(--chrome-bg);
  border-bottom: 1px solid var(--chrome-border);
}

.canvas-wrapper {
  flex: 1;
  overflow: auto;
  background: var(--canvas-bg);
  padding: 20px;
}

#ladderCanvas {
  display: block;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

/* ── I/O Monitor ────────────────────────────────────────────────── */
.io-monitor {
  width: 220px;
  background: var(--chrome-bg-light);
  border-left: 1px solid var(--chrome-border);
  padding: 8px;
}

.io-item {
  display: flex;
  justify-content: space-between;
  padding: 3px 6px;
  font-size: 11px;
  font-family: monospace;
  border-radius: 2px;
}

.io-item:hover { background: var(--chrome-bg-lighter); }

.io-item .tag { color: var(--chrome-accent); }
.io-item .state.on { color: var(--green); }
.io-item .state.off { color: var(--chrome-text-dim); }

/* ── Dialogs ────────────────────────────────────────────────────── */
.dialog-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.dialog-overlay.active { display: flex; }

.dialog {
  background: var(--chrome-bg-light);
  border: 1px solid var(--chrome-border);
  border-radius: 6px;
  min-width: 300px;
  padding: 16px;
}

.dialog-header {
  margin-bottom: 12px;
  font-weight: 600;
  font-size: 14px;
}

.dialog-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dialog-body input, .dialog-body select {
  padding: 6px;
  background: var(--chrome-bg);
  border: 1px solid var(--chrome-border);
  color: #fff;
  border-radius: 3px;
}

.dialog-footer {
  margin-top: 16px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}