/* Design System & Custom Properties */
:root {
  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Color Palette - Sleek Dark Slate with Neon Accents */
  --bg-primary: #0b0c10;
  --bg-secondary: #13151c;
  --bg-tertiary: #1b1e27;
  --bg-glass: rgba(19, 21, 28, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.15);
  
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --text-bright: #ffffff;

  /* Accents */
  --color-cyan: #00f2fe;
  --color-purple: #4facfe;
  --color-green: #00ff87;
  --color-red: #ff007f;
  --color-yellow: #f9d976;
  
  --gradient-accent: linear-gradient(135deg, var(--color-cyan) 0%, var(--color-purple) 100%);
  --shadow-premium: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Text Gradient Helper */
.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Utility Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}
.btn:hover {
  background: #242936;
  color: var(--text-bright);
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--gradient-accent);
  color: #000;
  font-weight: 600;
  border: none;
}
.btn-primary:hover {
  box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
  color: #000;
}
.btn-success {
  background: rgba(0, 255, 135, 0.1);
  color: var(--color-green);
  border-color: rgba(0, 255, 135, 0.3);
}
.btn-success:hover {
  background: var(--color-green);
  color: #000;
  box-shadow: 0 0 15px rgba(0, 255, 135, 0.4);
}
.btn-danger {
  background: rgba(255, 0, 127, 0.1);
  color: var(--color-red);
  border-color: rgba(255, 0, 127, 0.3);
}
.btn-danger:hover {
  background: var(--color-red);
  color: #fff;
  box-shadow: 0 0 15px rgba(255, 0, 127, 0.4);
}
.btn-block {
  width: 100%;
}

/* Badge Layout */
.badge {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0, 242, 254, 0.15);
  color: var(--color-cyan);
  border: 1px solid rgba(0, 242, 254, 0.25);
  margin-left: 8px;
}

/* Access Denied Card Page */
#blocked-container {
  display: none;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: radial-gradient(circle at center, #1b1216 0%, var(--bg-primary) 80%);
}
#blocked-container.active {
  display: flex;
}

.blocked-card {
  width: 440px;
  padding: 40px;
  border-radius: 16px;
  background: rgba(19, 21, 28, 0.85);
  border: 1px solid rgba(255, 0, 127, 0.2);
  box-shadow: var(--shadow-premium), 0 0 30px rgba(255, 0, 127, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  text-align: center;
}

.blocked-card .brand {
  text-align: center;
  margin-bottom: 24px;
}

.brand-logo {
  font-size: 44px;
  margin-bottom: 14px;
  display: inline-block;
}

.blocked-card h1 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-red);
  margin-bottom: 4px;
}

.blocked-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.blocked-body {
  margin-top: 16px;
}

.blocked-body strong {
  color: var(--color-cyan);
}

.lock-graphic {
  margin-top: 24px;
  font-size: 54px;
  color: rgba(255, 0, 127, 0.2);
  animation: pulseLock 2s infinite ease-in-out;
}

@keyframes pulseLock {
  0% { transform: scale(1); opacity: 0.2; }
  50% { transform: scale(1.08); opacity: 0.55; text-shadow: 0 0 20px rgba(255, 0, 127, 0.4); }
  100% { transform: scale(1); opacity: 0.2; }
}

.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 8px;
}

.input-group label i {
  margin-right: 6px;
  color: var(--color-cyan);
}

.input-group input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-bright);
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
  transition: var(--transition-smooth);
}

.input-group input:focus {
  outline: none;
  border-color: var(--color-cyan);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

/* IDE Main Workspace Layout */
#ide-container {
  display: none;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}
#ide-container.active {
  display: flex;
}

/* App Header styling */
.app-header {
  height: 56px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 100;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-left .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-bright);
}

.file-info {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
}

.file-info i {
  color: var(--color-purple);
}

/* Workspace Panels */
.workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
  height: calc(100vh - 84px); /* Header + Footer offset */
}

/* Sidebar Files Navigation */
.sidebar {
  width: 260px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-header h3 {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.sidebar-actions {
  display: flex;
  gap: 8px;
}

.sidebar-actions button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  transition: var(--transition-smooth);
}

.sidebar-actions button:hover {
  color: var(--color-cyan);
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  padding: 10px 0;
}

/* Tree Navigation elements */
.tree-node {
  font-family: var(--font-sans);
  font-size: 14px;
  user-select: none;
}

.tree-item {
  display: flex;
  align-items: center;
  padding: 6px 16px;
  cursor: pointer;
  gap: 8px;
  transition: var(--transition-smooth);
}

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

.tree-item.active {
  background-color: rgba(0, 242, 254, 0.08);
  border-left: 3px solid var(--color-cyan);
  color: var(--text-bright);
  padding-left: 13px;
}

.tree-item i {
  width: 16px;
  text-align: center;
}

.tree-item .fa-folder, .tree-item .fa-folder-open {
  color: var(--color-yellow);
}

.tree-item .fa-file-code, .tree-item .fa-file {
  color: var(--color-cyan);
}

.tree-children {
  padding-left: 16px;
  display: none;
}

.tree-children.active {
  display: block;
}

.tree-node-actions {
  margin-left: auto;
  display: none;
  gap: 6px;
}

.tree-item:hover .tree-node-actions {
  display: flex;
}

.tree-node-actions i {
  color: var(--text-muted);
  font-size: 11px;
  cursor: pointer;
}

.tree-node-actions i:hover {
  color: var(--color-red);
}

.loading-spinner {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 14px;
}

/* Code & Terminal Panes Layout Grid */
.editor-terminal-grid {
  flex: 1;
  display: grid;
  grid-template-rows: 1fr 1fr; /* Equal split initially */
  height: 100%;
  overflow: hidden;
}

.editor-pane, .terminal-pane {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 100%;
  background-color: var(--bg-primary);
}

.editor-pane {
  border-bottom: 1px solid var(--border-color);
}

.pane-header {
  height: 38px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  flex-shrink: 0;
  user-select: none;
}

.pane-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.pane-title i {
  font-size: 14px;
}

.pane-content {
  flex: 1;
  overflow: hidden;
  position: relative;
  height: 100%;
}

/* Editor Specific Placeholders */
#monaco-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  gap: 16px;
}

#monaco-placeholder i {
  font-size: 48px;
  color: var(--bg-tertiary);
}

#monaco-placeholder p {
  font-size: 14px;
}

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

.status-indicator {
  font-size: 11px;
  color: var(--color-green);
  background: rgba(0, 255, 135, 0.15);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0, 255, 135, 0.25);
  display: none;
}

.status-indicator.saving {
  color: var(--color-yellow);
  background: rgba(249, 217, 118, 0.15);
  border-color: rgba(249, 217, 118, 0.25);
  display: block;
}

.status-indicator.modified {
  color: var(--color-cyan);
  background: rgba(0, 242, 254, 0.15);
  border-color: rgba(0, 242, 254, 0.25);
  display: block;
}

/* Terminal Frame Specifics */
.terminal-actions {
  display: flex;
  gap: 8px;
}

.terminal-actions button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition-smooth);
}

.terminal-actions button:hover {
  color: var(--text-bright);
}

#terminal-container {
  padding: 8px;
  background-color: #000;
  height: 100%;
  width: 100%;
}

/* Xterm.js styling tweaks for seamless visual fit */
.xterm {
  padding: 4px;
}
.xterm-viewport {
  background-color: #000 !important;
}

/* Footer layout */
.app-footer {
  height: 28px;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-size: 12px;
  color: var(--text-muted);
  user-select: none;
}

.footer-left, .footer-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-item i {
  font-size: 10px;
}

.text-green {
  color: var(--color-green);
}
.text-red {
  color: var(--color-red);
}
.text-cyan {
  color: var(--color-cyan);
}
.text-purple {
  color: var(--color-purple);
}

/* Modal overlays for file/folder creating prompts */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

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

.modal-card {
  width: 360px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow-premium);
}

.modal-card h3 {
  font-size: 18px;
  color: var(--text-bright);
  margin-bottom: 18px;
}

.modal-card input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-bright);
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: 14px;
}

.modal-card input:focus {
  outline: none;
  border-color: var(--color-cyan);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* Tooltips */
.tooltip {
  position: relative;
}