:root{--color-primary: #2196f3;--color-primary-dark: #1976d2;--color-primary-light: #64b5f6;--color-secondary: #ff9800;--color-secondary-dark: #f57c00;--color-secondary-light: #ffb74d;--color-success: #4caf50;--color-success-dark: #388e3c;--color-error: #f44336;--color-error-dark: #d32f2f;--color-warning: #ff9800;--color-warning-dark: #f57c00;--color-info: #2196f3;--color-info-dark: #1976d2;--color-background: #f5f5f5;--color-surface: #ffffff;--color-surface-variant: #f9f9f9;--color-text-primary: #333333;--color-text-secondary: #666666;--color-text-tertiary: #999999;--color-text-disabled: #cccccc;--color-text-inverse: #ffffff;--color-border-default: #e0e0e0;--color-border-light: #f0f0f0;--color-border-dark: #cccccc;--color-overlay: rgba(0, 0, 0, .5);--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 12px;--spacing-lg: 16px;--spacing-xl: 24px;--spacing-2xl: 32px;--spacing-3xl: 48px;--spacing-4xl: 64px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 2px 4px rgba(0, 0, 0, .05);--shadow-lg: 0 4px 8px rgba(0, 0, 0, .1);--shadow-xl: 0 4px 20px rgba(0, 0, 0, .2);--transition-fast: .15s;--transition-normal: .2s;--transition-slow: .3s;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;--font-size-xs: 12px;--font-size-sm: 14px;--font-size-base: 16px;--font-size-lg: 18px;--font-size-xl: 20px;--font-size-2xl: 24px;--font-size-3xl: 28px;--font-size-4xl: 32px;--font-size-5xl: 48px;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--z-dropdown: 1000;--z-sticky: 1020;--z-fixed: 1030;--z-modal-backdrop: 1040;--z-modal: 1050;--z-popover: 1060;--z-tooltip: 1070}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--color-background);color:var(--color-text-primary)}#app{width:100%;min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-lg)}.card{background-color:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border-default);box-shadow:var(--shadow-md);padding:var(--spacing-xl)}.btn{padding:var(--spacing-md) var(--spacing-xl);border-radius:var(--radius-md);font-size:var(--font-size-base);font-weight:var(--font-weight-medium);cursor:pointer;transition:all var(--transition-normal);border:none;display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm)}.btn-primary{background-color:var(--color-primary);color:var(--color-text-inverse)}.btn-primary:hover{background-color:var(--color-primary-dark)}.btn-secondary{background-color:var(--color-secondary);color:var(--color-text-inverse)}.btn-secondary:hover{background-color:var(--color-secondary-dark)}.btn-outline{background-color:transparent;border:1px solid var(--color-border-default);color:var(--color-text-primary)}.btn-outline:hover{background-color:var(--color-surface-variant)}.input{width:100%;padding:var(--spacing-md);border:1px solid var(--color-border-default);border-radius:var(--radius-md);font-size:var(--font-size-base);font-family:var(--font-family);transition:border-color var(--transition-normal)}.input:focus{outline:none;border-color:var(--color-primary)}.input::placeholder{color:var(--color-text-tertiary)}