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

:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --accent: #0f94d4;
  --accent-glow: #00d4ff;
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0b0;
  --danger: #e74c3c;
  --success: #00b894;
  --border-radius: 8px;
}

body {
  font-family: 'Space Grotesk', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
#header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--bg-tertiary);
  z-index: 100;
}

.logo {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.header-actions {
  display: flex;
  gap: 0.5rem;
}

.header-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.header-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Main Container */
#main-container {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Panels */
.panel {
  background: var(--bg-secondary);
  border-right: 1px solid var(--bg-tertiary);
  padding: 1rem;
  overflow-y: auto;
  width: 220px;
  flex-shrink: 0;
}

.panel:last-child {
  border-right: none;
  border-left: 1px solid var(--bg-tertiary);
}

.panel h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--bg-tertiary);
}

.panel h4 {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Primitives Grid */
.primitives-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.primitive-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 0.6rem 0.3rem;
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.primitive-btn svg {
  width: 24px;
  height: 24px;
  opacity: 0.8;
}

.primitive-btn span {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.primitive-btn:hover {
  background: var(--accent);
  border-color: var(--accent-glow);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(15, 148, 212, 0.3);
}

/* Object List */
.object-list {
  max-height: 200px;
  overflow-y: auto;
}

.object-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: var(--bg-tertiary);
  border-radius: 4px;
  margin-bottom: 0.3rem;
  cursor: pointer;
  transition: all 0.15s;
}

.object-item:hover {
  background: var(--bg-primary);
}

.object-item.selected {
  background: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.obj-visibility {
  opacity: 0.7;
  font-size: 0.8rem;
  cursor: pointer;
}

.obj-visibility.hidden {
  opacity: 0.3;
}

.obj-name {
  font-size: 0.8rem;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Viewport */
#viewport {
  flex: 1;
  position: relative;
  background: #2a3a4a;
}

#scene-container {
  width: 100%;
  height: 100%;
}

#scene-container canvas {
  display: block;
}

#transform-modes {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.3rem;
  background: var(--bg-secondary);
  padding: 0.3rem;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.mode-btn {
  padding: 0.5rem 0.8rem;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.15s;
}

.mode-btn:hover {
  background: var(--bg-tertiary);
}

.mode-btn.active {
  background: var(--accent);
}

/* Properties Panel */
.property-group {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--bg-tertiary);
}

.input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}

.input-row label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  width: 60px;
  flex-shrink: 0;
}

.input-row input[type="number"],
.input-row input[type="text"] {
  flex: 1;
  padding: 0.4rem;
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  width: 100%;
}

.input-row input[type="number"]:focus,
.input-row input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.input-row input[type="color"] {
  flex: 1;
  height: 32px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.input-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.input-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.color-presets {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.color-presets .preset {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s;
}

.color-presets .preset:hover {
  transform: scale(1.2);
  border-color: var(--text-primary);
}

.action-buttons {
  display: flex;
  gap: 0.5rem;
}

.action-btn {
  flex: 1;
  padding: 0.6rem;
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.8rem;
  transition: all 0.2s;
}

.action-btn:hover {
  background: var(--accent);
}

.action-btn.danger:hover {
  background: var(--danger);
}

.info-text {
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: center;
  padding: 2rem 0;
}

.hidden {
  display: none !important;
}

/* Bottom Bar */
#bottom-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.6rem 1rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--bg-tertiary);
  gap: 1rem;
  flex-wrap: wrap;
}

.camera-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cam-btn {
  padding: 0.5rem 0.8rem;
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.8rem;
  transition: all 0.2s;
}

.cam-btn:hover {
  background: var(--accent);
}

.cam-btn.locked {
  background: var(--danger);
}

.view-presets {
  display: flex;
  gap: 0.3rem;
}

.preset-btn {
  padding: 0.4rem 0.6rem;
  background: var(--bg-primary);
  border: 1px solid var(--bg-tertiary);
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.7rem;
  text-transform: uppercase;
  transition: all 0.15s;
}

.preset-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.scene-options {
  display: flex;
  gap: 1rem;
}

.scene-options label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.scene-options input {
  accent-color: var(--accent);
}

.export-controls {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.export-controls select {
  padding: 0.5rem;
  background: var(--bg-tertiary);
  border: none;
  border-radius: 4px;
  color: var(--text-primary);
  font-family: inherit;
  cursor: pointer;
}

.export-controls label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.export-btn {
  padding: 0.6rem 1.2rem;
  background: linear-gradient(135deg, var(--success), var(--accent));
  border: none;
  border-radius: var(--border-radius);
  color: white;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
  box-shadow: 0 4px 15px rgba(0, 184, 148, 0.3);
}

.export-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 184, 148, 0.4);
}

/* Footer */
#footer {
  text-align: center;
  padding: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-primary);
}

#footer a {
  color: var(--accent);
  text-decoration: none;
}

#footer a:hover {
  text-decoration: underline;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--bg-secondary);
  padding: 2rem;
  border-radius: var(--border-radius);
  max-width: 400px;
  width: 90%;
}

.modal-content h2 {
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.shortcut-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin-bottom: 1.5rem;
}

.shortcut-list div {
  font-size: 0.9rem;
}

kbd {
  background: var(--bg-tertiary);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  margin-right: 0.5rem;
}

/* Mobile Responsive */
@media (max-width: 900px) {
  #main-container {
    flex-direction: column;
  }

  .panel {
    width: 100%;
    height: auto;
    max-height: 200px;
    border: none;
    border-bottom: 1px solid var(--bg-tertiary);
  }

  #primitives-panel {
    order: 2;
  }

  #viewport {
    order: 1;
    min-height: 300px;
  }

  #properties-panel {
    order: 3;
  }

  .primitives-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  #bottom-bar {
    flex-direction: column;
    padding: 0.8rem;
    gap: 0.8rem;
  }

  .camera-controls,
  .scene-options,
  .export-controls {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .view-presets {
    display: none;
  }
}

@media (max-width: 600px) {
  .primitives-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .primitive-btn span {
    display: none;
  }

  .scene-options {
    display: none;
  }

  #transform-modes {
    top: 0.5rem;
  }

  .shortcut-list {
    grid-template-columns: 1fr;
  }
}