:root{--color-primary: #1a1a2e;--color-primary-dark: #16213e;--color-primary-light: #0f3460;--color-secondary: #667eea;--color-secondary-dark: #764ba2;--color-accent: #4ecdc4;--color-accent-hover: #ff6b6b;--color-background: #f5f5f5;--color-surface: #ffffff;--color-surface-hover: rgba(255, 255, 255, .1);--color-surface-active: rgba(255, 255, 255, .15);--color-text-primary: #1a1a2e;--color-text-secondary: #666666;--color-text-tertiary: #999999;--color-text-inverse: #ffffff;--color-text-inverse-muted: rgba(255, 255, 255, .8);--color-text-inverse-light: rgba(255, 255, 255, .7);--color-text-inverse-lighter: rgba(255, 255, 255, .6);--color-border: rgba(255, 255, 255, .1);--color-border-light: rgba(0, 0, 0, .1);--gradient-sidebar: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);--gradient-button: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .1);--shadow-md: 0 4px 12px rgba(0, 0, 0, .15);--shadow-lg: 2px 0 10px rgba(0, 0, 0, .1);--shadow-button: 0 4px 12px rgba(102, 126, 234, .4);--spacing-xs: .5rem;--spacing-sm: .75rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--border-radius-sm: 8px;--border-radius-md: 12px;--border-radius-lg: 16px;--transition-fast: .2s ease;--transition-normal: .3s ease;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: .95rem;--font-size-md: 1rem;--font-size-lg: 1.25rem;--font-size-xl: 1.75rem;--font-size-2xl: 2rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--sidebar-width: 260px;--sidebar-width-mobile: 80px;--content-max-width: 1400px}.theme-card{background:var(--color-surface);border-radius:var(--border-radius-md);padding:var(--spacing-lg);box-shadow:var(--shadow-sm)}.theme-card:hover{box-shadow:var(--shadow-md)}.theme-button-primary{background:var(--gradient-button);color:var(--color-text-inverse);border:none;padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--border-radius-sm);font-size:var(--font-size-md);font-weight:var(--font-weight-semibold);cursor:pointer;transition:transform var(--transition-fast),box-shadow var(--transition-fast)}.theme-button-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-button)}.theme-text-primary{color:var(--color-text-primary)}.theme-text-secondary{color:var(--color-text-secondary)}.theme-text-tertiary{color:var(--color-text-tertiary)}.theme-icon{color:var(--color-text-primary);font-size:1.5rem}.theme-icon-large{font-size:2.5rem;color:var(--color-secondary)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--color-background)}html,body{height:100%}.material-icons{font-family:Material Icons;font-weight:400;font-style:normal;font-size:24px;line-height:1;letter-spacing:normal;text-transform:none;display:inline-block;white-space:nowrap;word-wrap:normal;direction:ltr;-webkit-font-feature-settings:"liga";-webkit-font-smoothing:antialiased}