/* dual-tmux Unified Design System Theme */
:root {
  /* Color Palette - Dark Console Focused */
  --dt-bg-canvas: #090d13;
  --dt-bg-surface: #0f172a;
  --dt-bg-surface-raised: #1e293b;
  --dt-bg-surface-active: #334155;
  --dt-bg-surface-subtle: rgba(255, 255, 255, 0.03);

  /* Borders */
  --dt-border-subtle: rgba(255, 255, 255, 0.08);
  --dt-border-default: rgba(255, 255, 255, 0.14);
  --dt-border-strong: rgba(255, 255, 255, 0.25);
  --dt-border-focus: #3b82f6;

  /* Typography */
  --dt-text-primary: #f8fafc;
  --dt-text-secondary: #94a3b8;
  --dt-text-muted: #64748b;
  --dt-text-dim: #475569;
  --dt-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --dt-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;

  /* Accent & Semantics */
  --dt-primary: #3b82f6;
  --dt-primary-hover: #2563eb;
  --dt-primary-subtle: rgba(59, 130, 246, 0.15);

  --dt-success: #10b981;
  --dt-success-hover: #059669;
  --dt-success-subtle: rgba(16, 185, 129, 0.15);

  --dt-warning: #f59e0b;
  --dt-warning-hover: #d97706;
  --dt-warning-subtle: rgba(245, 158, 11, 0.15);

  --dt-danger: #ef4444;
  --dt-danger-hover: #dc2626;
  --dt-danger-subtle: rgba(239, 68, 68, 0.15);

  --dt-purple: #8b5cf6;
  --dt-cyan: #06b6d4;

  /* Radii & Shadows */
  --dt-radius-sm: 4px;
  --dt-radius-md: 8px;
  --dt-radius-lg: 12px;
  --dt-radius-full: 9999px;
  --dt-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --dt-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --dt-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

/* Base resets within dual-tmux context */
.dt-scope * {
  box-sizing: border-box;
}

/* Buttons */
.dt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--dt-font-sans);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.2;
  padding: 7px 14px;
  border-radius: var(--dt-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  user-select: none;
  white-space: nowrap;
}

.dt-btn-primary {
  background: var(--dt-primary);
  color: #ffffff;
  border-color: var(--dt-primary);
}
.dt-btn-primary:hover:not(:disabled) {
  background: var(--dt-primary-hover);
  border-color: var(--dt-primary-hover);
}

.dt-btn-ghost {
  background: var(--dt-bg-surface-raised);
  color: var(--dt-text-primary);
  border-color: var(--dt-border-default);
}
.dt-btn-ghost:hover:not(:disabled) {
  background: var(--dt-bg-surface-active);
  border-color: var(--dt-border-strong);
}

.dt-btn-danger {
  background: var(--dt-danger-subtle);
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.4);
}
.dt-btn-danger:hover:not(:disabled) {
  background: var(--dt-danger);
  color: #ffffff;
  border-color: var(--dt-danger);
}

.dt-btn-sm {
  padding: 4px 8px;
  font-size: 11px;
  border-radius: var(--dt-radius-sm);
}

.dt-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  filter: grayscale(40%);
}

/* Inputs & Form Controls */
.dt-input, .dt-select, .dt-textarea {
  font-family: var(--dt-font-sans);
  font-size: 13px;
  color: var(--dt-text-primary);
  background: var(--dt-bg-surface-raised);
  border: 1px solid var(--dt-border-default);
  border-radius: var(--dt-radius-md);
  padding: 8px 12px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.dt-input:focus, .dt-select:focus, .dt-textarea:focus {
  border-color: var(--dt-border-focus);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}
.dt-textarea {
  font-family: var(--dt-font-mono);
  resize: vertical;
}

/* Badges */
.dt-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 7px;
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--dt-radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.dt-badge-dst {
  background: var(--dt-success-subtle);
  color: var(--dt-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.dt-badge-draft {
  background: var(--dt-warning-subtle);
  color: var(--dt-warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}
.dt-badge-live {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}
.dt-badge-down {
  background: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
}

/* Status Indicators (Lamps) */
.dt-lamp {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dt-lamp-green {
  background: var(--dt-success);
  box-shadow: 0 0 6px var(--dt-success);
}
.dt-lamp-yellow {
  background: var(--dt-warning);
  box-shadow: 0 0 6px var(--dt-warning);
  animation: dt-pulse 1.2s ease-in-out infinite;
}
.dt-lamp-red {
  background: var(--dt-danger);
  box-shadow: 0 0 6px var(--dt-danger);
}
.dt-lamp-gray {
  background: var(--dt-text-muted);
}

@keyframes dt-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.9); }
}

/* Cards & Containers */
.dt-card {
  background: var(--dt-bg-surface);
  border: 1px solid var(--dt-border-subtle);
  border-radius: var(--dt-radius-lg);
  padding: 16px;
  box-shadow: var(--dt-shadow-sm);
}