@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Share+Tech+Mono&display=swap');

:root {
  --bg: #0a0a0f;
  --bg-panel: #111118;
  --bg-hover: #1a1a28;
  --border: #1e1e32;
  --border-active: #00ff4133;
  --text: #b0b0c0;
  --text-bright: #e0e0f0;
  --text-dim: #606078;
  --accent: #00ff41;
  --accent2: #00ccff;
  --accent3: #ff4466;
  --accent4: #ffaa00;
  --wire-on: #00ff41;
  --wire-off: #444466;
  --wire-active: #00ccff;
  --glow: 0 0 8px #00ff4133;
  --font: 'JetBrains Mono', 'Share Tech Mono', monospace;
  --radius: 4px;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  user-select: none;
}

.scanlines {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none;
  z-index: 1000;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.03) 2px,
    rgba(0,0,0,0.03) 4px
  );
}

header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  z-index: 10;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-icon {
  color: var(--accent);
  font-size: 20px;
  text-shadow: var(--glow);
}
.logo h1 {
  font-size: 18px;
  color: var(--accent);
  text-shadow: var(--glow);
  letter-spacing: 4px;
}
.logo-sub {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 3px;
}

#mode-nav {
  display: flex;
  gap: 2px;
  margin-left: 16px;
}
#mode-nav button {
  font-family: var(--font);
  font-size: 11px;
  padding: 6px 14px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}
#mode-nav button.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 700;
}
#mode-nav button:hover:not(.active) {
  border-color: var(--text-dim);
  color: var(--text);
}

.header-info {
  flex: 1;
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 12px;
}
#puzzle-name { color: var(--text-bright); }
#puzzle-difficulty {
  font-size: 10px;
  padding: 2px 8px;
  background: var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
}

.header-actions {
  display: flex;
  gap: 6px;
}
.header-actions button {
  font-family: var(--font);
  font-size: 12px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}
.header-actions button:hover {
  border-color: var(--text-dim);
}
.btn-run {
  background: var(--accent) !important;
  color: var(--bg) !important;
  border-color: var(--accent) !important;
  font-weight: 700;
  letter-spacing: 2px;
}
.btn-run:hover {
  box-shadow: 0 0 16px #00ff4144;
}
.btn-reset {
  width: 40px;
  padding: 8px !important;
  font-size: 16px !important;
}

main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

aside {
  width: 220px;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  flex-shrink: 0;
  padding: 8px;
}

#sidebar-right {
  border-right: none;
  border-left: 1px solid var(--border);
}

.panel {
  margin-bottom: 12px;
}
.panel h3 {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 3px;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.block-palette {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.palette-block {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  background: var(--bg);
  border: 1px solid transparent;
  cursor: grab;
  font-size: 11px;
  color: var(--text-bright);
  transition: all 0.1s;
}
.palette-block:hover {
  border-color: var(--border-active);
  background: var(--bg-hover);
}
.palette-block .pb-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  border-radius: 2px;
}
.pb-icon.logic { background: #1a3a2a; color: var(--accent); }
.pb-icon.math { background: #1a2a3a; color: var(--accent2); }
.pb-icon.flow { background: #2a1a2a; color: var(--accent3); }
.pb-icon.io { background: #2a2a1a; color: var(--accent4); }

#workspace-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 50%, #0d0d18 0%, var(--bg) 70%);
}

#workspace {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  cursor: default;
}

#tooltip {
  position: absolute;
  padding: 4px 8px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-bright);
  font-size: 10px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s;
  z-index: 20;
  white-space: nowrap;
}

.info-row {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  padding: 2px 0;
  color: var(--text-dim);
}
.info-row span:last-child {
  color: var(--text-bright);
}
.status-idle { color: var(--text-dim) !important; }
.status-running { color: var(--accent2) !important; }
.status-success { color: var(--accent) !important; }
.status-fail { color: var(--accent3) !important; }

#puzzle-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.puzzle-item {
  padding: 6px 8px;
  background: var(--bg);
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 11px;
  transition: all 0.1s;
}
.puzzle-item:hover {
  border-color: var(--border-active);
  background: var(--bg-hover);
}
.puzzle-item.active {
  border-color: var(--accent);
  background: #00ff4108;
}
.puzzle-item .pi-name {
  color: var(--text-bright);
  font-size: 11px;
}
.puzzle-item .pi-meta {
  color: var(--text-dim);
  font-size: 9px;
}
.puzzle-item.completed .pi-name::after {
  content: ' ✔';
  color: var(--accent);
}

#controls-help {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.ctrl-row {
  font-size: 9px;
  color: var(--text-dim);
}
.ctrl-row kbd {
  display: inline-block;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0 4px;
  font-family: var(--font);
  font-size: 9px;
  color: var(--text-bright);
  min-width: 36px;
  text-align: center;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 24px;
  background: var(--bg-panel);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 12px;
  z-index: 2000;
  transition: opacity 0.3s;
}
.toast.hidden { opacity: 0; pointer-events: none; }
.toast.error { border-color: var(--accent3); color: var(--accent3); }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }

#block-palette .palette-block:active {
  cursor: grabbing;
  background: var(--bg-hover);
  border-color: var(--accent);
}