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

:root {
  --bg: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #252525;
  --border: #333;
  --text: #e5e5e5;
  --text-muted: #888;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --danger: #ef4444;
  --success: #22c55e;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Layout */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.header h1 {
  font-size: 1.25rem;
  font-weight: 600;
}

.header nav {
  display: flex;
  gap: 1.5rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-size: 0.875rem;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
}

input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

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

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-small {
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.card-header h2 {
  font-size: 1.125rem;
  font-weight: 600;
}

/* Client List */
.client-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.client-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--bg-tertiary);
  border-radius: 6px;
}

.client-item-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.client-item-name {
  font-weight: 500;
}

.client-item-id {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: monospace;
}

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

/* Login Page */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
}

.login-box {
  width: 100%;
  max-width: 400px;
}

.login-box h1 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.5rem;
}

/* Editor Layout */
.editor-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  height: calc(100vh - 140px);
}

.editor-panel {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.editor-tabs {
  display: flex;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border);
}

.editor-tab {
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.editor-tab.active {
  color: var(--text);
  border-bottom-color: var(--primary);
}

.editor-content {
  flex: 1;
  overflow: hidden;
}

.preview-frame {
  width: 100%;
  height: 100%;
  border: none;
}

/* Toolbar */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.toolbar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.toolbar-right {
  display: flex;
  gap: 0.75rem;
}

/* Code snippet display */
.code-snippet {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  font-family: 'SF Mono', Monaco, 'Courier New', monospace;
  font-size: 0.8125rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
  overflow-y: auto;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  width: 90%;
  max-width: 500px;
}

.modal h3 {
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* Alert */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: 0.875rem;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid var(--success);
  color: var(--success);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

/* Grid layout for dashboard */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.client-item {
  flex-wrap: wrap;
  gap: 0.75rem;
}

.client-item-info {
  flex: 1;
  min-width: 150px;
}

.client-item-actions {
  flex-shrink: 0;
}

@media (max-width: 1100px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 1rem;
  }
}

@media (max-width: 900px) {
  .editor-container {
    grid-template-columns: 1fr;
    height: auto;
  }

  .editor-panel {
    min-height: 400px;
  }

  .header {
    padding: 1rem;
  }

  .header nav {
    gap: 1rem;
  }

  .toolbar {
    padding: 1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .toolbar-left,
  .toolbar-right {
    flex-wrap: wrap;
  }
}

/* Hide elements */
.hidden {
  display: none !important;
}

/* CodeMirror overrides */
.cm-editor {
  height: 100%;
  font-size: 14px;
}

.cm-scroller {
  overflow: auto;
}