:root {
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #eef1f5;
  --color-bg-tertiary: #dde3ea;
  --color-bg-elevated: #ffffff;
  --color-bg-hover: #e2e8ef;
  --color-bg-active: #d4dbe4;
  --color-bg-dark: #1e293b;
  --color-bg-dark-secondary: #334155;
  --color-border: #c7d0db;
  --color-border-light: #d9e1e9;
  --color-border-focus: #3b82f6;
  --color-text-primary: #0f172a;
  --color-text-secondary: #334155;
  --color-text-tertiary: #64748b;
  --color-text-inverse: #ffffff;
  --color-accent-primary: #3b82f6;
  --color-accent-primary-hover: #2563eb;
  --color-accent-primary-dark: #1d4ed8;
  --color-accent-primary-light: #dbeafe;
  --color-accent-success: #10b981;
  --color-accent-success-dark: #059669;
  --color-accent-success-light: #d1fae5;
  --color-accent-warning: #f59e0b;
  --color-accent-warning-dark: #d97706;
  --color-accent-warning-light: #fef3c7;
  --color-accent-danger: #ef4444;
  --color-accent-danger-dark: #dc2626;
  --color-accent-danger-light: #fee2e2;
  --color-accent-info: #06b6d4;
  --color-accent-info-light: #cffafe;
  --color-accent-purple: #8b5cf6;
  --color-accent-purple-light: #ede9fe;
  --color-accent-indigo: #6366f1;
  --color-accent-indigo-light: #e0e7ff;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.08);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.06);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.06);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.12), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-button: 0 2px 4px -1px rgb(0 0 0 / 0.12), 0 1px 2px -1px rgb(0 0 0 / 0.08);
  --shadow-button-hover: 0 8px 16px -4px rgb(0 0 0 / 0.18), 0 4px 8px -2px rgb(0 0 0 / 0.12);
  --shadow-button-active: 0 1px 2px -1px rgb(0 0 0 / 0.12);
  --shadow-card: 0 1px 3px 0 rgb(0 0 0 / 0.08), 0 1px 2px -1px rgb(0 0 0 / 0.04);
  --shadow-card-hover: 0 4px 12px -2px rgb(0 0 0 / 0.12), 0 2px 4px -2px rgb(0 0 0 / 0.08);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.sidebar {
  width: 260px;
  background: #1e293b;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 100;
  overflow-y: auto;
}

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

.app-layout {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  margin-left: 260px;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

.content {
  flex: 1;
  padding: 28px;
  overflow-x: hidden;
  min-width: 0;
}

@media (max-width: 1024px) {
  .main-content { margin-left: 220px; }
}

@media (max-width: 768px) {
  .main-content { margin-left: 0; }
}