:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121c;
  --bg-tertiary: #1a1a28;
  --border-color: rgba(255, 255, 255, 0.08);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --accent-purple: #BD4FF4;
  --accent-pink: #E48A60;
  --accent-gradient: linear-gradient(135deg, #BD4FF4 0%, #E48A60 100%);
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --header-height: 52px;
  --footer-height: 44px;
}

[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --border-color: rgba(0, 0, 0, 0.1);
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --accent-purple: #9333ea;
  --accent-pink: #dd6b20;
  --accent-gradient: linear-gradient(135deg, #9333ea 0%, #dd6b20 100%);
}

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

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

/* APP CONTAINER */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* TOP HEADER */
.top-header {
  height: var(--header-height);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
}

.brand-icon {
  color: var(--accent-purple);
  font-size: 1.2rem;
}

.brand-name {
  background-image: linear-gradient(to right, #BD4FF4, #E48A60, #a855f7, #BD4FF4);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: pan-gradient 4s linear infinite;
  font-weight: 800;
}

@keyframes pan-gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(189, 79, 244, 0.25);
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(189, 79, 244, 0.4);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

/* WORKSPACE PANEL */
.workspace-panel {
  display: flex;
  flex: 1;
  height: calc(100vh - var(--header-height) - var(--footer-height));
  overflow: hidden;
  position: relative;
}

/* VS CODE SIDEBAR */
.vscode-sidebar {
  display: flex;
  width: 240px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  user-select: none;
  shrink: 0;
}

.activity-bar {
  width: 44px;
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 10px;
}

.activity-icon {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.2s;
}

.activity-icon.active {
  color: var(--accent-purple);
  border-left: 2px solid var(--accent-purple);
  border-radius: 0 6px 6px 0;
}

.file-explorer {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.explorer-header {
  height: 36px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-secondary);
}

.icon-btn-sm {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.icon-btn-sm:hover {
  color: var(--accent-purple);
}

.file-tree {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-family: 'Fira Code', monospace;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s ease;
  position: relative;
}

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

.file-item.active {
  background: rgba(189, 79, 244, 0.15);
  color: var(--text-primary);
  border-left: 3px solid var(--accent-purple);
  font-weight: 600;
}

.file-item i {
  font-size: 0.95rem;
  width: 16px;
  text-align: center;
}

.file-item .file-name {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* CENTER EDITOR SECTION */
.editor-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  min-width: 250px;
}

.editor-tabs-bar {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
  user-select: none;
}

.editor-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-tertiary);
  padding: 7px 14px;
  border-right: 1px solid var(--border-color);
  font-family: 'Fira Code', monospace;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.editor-tab.active {
  background: var(--bg-primary);
  color: var(--text-primary);
  border-top: 2px solid var(--accent-purple);
  font-weight: 600;
}

.editor-tab .close-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 2px;
  border-radius: 4px;
  font-size: 0.75rem;
}

.editor-tab .close-tab-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* OUTPUT SECTION */
.output-section {
  width: 32%;
  min-width: 200px;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

/* RESIZER */
.resizer {
  width: 6px;
  background: var(--bg-primary);
  cursor: col-resize;
  position: relative;
  z-index: 5;
  transition: background 0.2s;
  flex-shrink: 0;
}

.resizer:hover, .resizer.dragging {
  background: var(--accent-purple);
}

/* Resizing drag state for butter-smooth resizing */
body.is-resizing, body.is-resizing * {
  user-select: none !important;
  cursor: col-resize !important;
}

body.is-resizing iframe {
  pointer-events: none !important;
}

/* SECTION HEADER */
.section-header {
  height: 36px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
}

.editor-info {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
}

.output-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-pill {
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.7rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-pill.running {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning-color);
  border-color: rgba(245, 158, 11, 0.3);
}

.status-pill.error {
  background: rgba(239, 68, 68, 0.15);
  color: var(--error-color);
  border-color: rgba(239, 68, 68, 0.3);
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px;
  border-radius: 4px;
  transition: color 0.2s;
}

.icon-btn:hover {
  color: var(--text-primary);
}

.close-output-btn:hover {
  color: var(--error-color) !important;
}

/* EDITOR WRAPPER & CODEMIRROR */
.editor-wrapper, .output-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.CodeMirror {
  height: 100% !important;
  font-family: 'Fira Code', monospace !important;
  font-size: 14px;
  line-height: 1.6;
}

.output-wrapper pre {
  padding: 14px;
  font-family: 'Fira Code', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  color: #34d399;
  white-space: pre-wrap;
  word-break: break-word;
  height: 100%;
  overflow-y: auto;
}

.web-preview-frame {
  width: 100%;
  height: 100%;
  border: none;
  background: #ffffff;
}

.hidden {
  display: none !important;
}

/* CUSTOM RIGHT CLICK CONTEXT MENU */
.context-menu {
  position: fixed;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  padding: 6px;
  min-width: 170px;
  z-index: 9999;
  backdrop-filter: blur(8px);
  animation: contextFadeIn 0.15s ease;
}

@keyframes contextFadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: 0.82rem;
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}

.menu-item:hover {
  background: var(--bg-tertiary);
  color: var(--accent-purple);
}

.menu-item.danger:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--error-color);
}

.menu-divider {
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

/* BOTTOM BAR */
.bottom-bar {
  height: var(--footer-height);
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  gap: 16px;
  z-index: 10;
}

.bottom-left-space {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 1;
  max-width: 580px;
}

.ai-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 4px 12px;
  width: 100%;
  transition: border-color 0.2s;
}

.ai-input-wrapper:focus-within {
  border-color: var(--accent-purple);
}

.ai-sparkle-icon {
  color: var(--accent-purple);
  font-size: 0.85rem;
  margin-right: 8px;
}

.ai-input-wrapper input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.82rem;
  width: 100%;
}

.ai-send-btn {
  background: transparent;
  border: none;
  color: var(--accent-purple);
  cursor: pointer;
  padding: 4px 8px;
  font-size: 0.85rem;
}

.ai-status-indicator {
  font-size: 0.75rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.bottom-right-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reopen-output-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--accent-purple);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.reopen-output-btn:hover {
  background: rgba(189, 79, 244, 0.2);
  border-color: rgba(189, 79, 244, 0.4);
}

.detected-lang-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 6px;
  font-family: 'Fira Code', monospace;
  font-size: 0.78rem;
  color: #38bdf8;
  font-weight: 500;
  cursor: default;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}

.styled-select {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  outline: none;
  cursor: pointer;
}

.styled-select:focus {
  border-color: var(--accent-purple);
}

/* TOAST */
.toast-container {
  position: fixed;
  bottom: 56px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 1000;
}

.toast {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@media (max-width: 768px) {
  .vscode-sidebar {
    display: none;
  }
  .workspace-panel {
    flex-direction: column;
  }
  .output-section {
    width: 100% !important;
    height: 40%;
    border-left: none;
    border-top: 1px solid var(--border-color);
  }
  .resizer {
    display: none;
  }
  .bottom-bar {
    flex-direction: column;
    height: auto;
    padding: 10px;
  }
}

/* INLINE FILE CREATION & RENAME INPUT (VS CODE STYLE) */
.inline-file-input, .rename-file-input {
  background: var(--bg-primary, #0d1117);
  border: 1px solid var(--accent-purple, #bd4ff4);
  color: var(--text-primary, #f0f6fc);
  font-family: 'Fira Code', monospace;
  font-size: 0.82rem;
  padding: 3px 6px;
  border-radius: 4px;
  outline: none;
  width: 100%;
  box-shadow: 0 0 8px rgba(189, 79, 244, 0.4);
}