/* GTAIScience Design System - CSS Variables */
/* Default theme: Light Blue (浅蓝色主题) */
:root {
    /* Primary Colors */
    --color-primary: #0066FF;
    --color-primary-light: #3388FF;
    --color-primary-dark: #0044CC;
    --color-secondary: #00B894;
    --color-secondary-light: #55D4B8;
    --color-accent: #6C5CE7;
    --color-accent-light: #8B7CF0;
    
    /* Background Colors - Light Blue */
    --color-bg-primary: #F0F7FF;
    --color-bg-secondary: #FFFFFF;
    --color-bg-tertiary: #E8F4FD;
    --color-bg-card: #FFFFFF;
    --color-bg-card-hover: #F5FAFF;
    --color-bg-input: #FFFFFF;
    --color-bg-overlay: rgba(240, 247, 255, 0.9);
    
    /* Text Colors */
    --color-text-primary: #1A2332;
    --color-text-secondary: #4A5568;
    --color-text-muted: #8899AA;
    --color-text-accent: #00B894;
    --color-text-link: #0066FF;
    
    /* Border & Divider */
    --color-border: #D0E3F5;
    --color-border-light: #E3EFF9;
    --color-divider: #E8F4FD;
    
    /* Status Colors */
    --color-success: #00B894;
    --color-warning: #F39C12;
    --color-error: #E74C3C;
    --color-info: #0095FF;
    
    /* Gradients - Light Blue */
    --gradient-primary: linear-gradient(135deg, #0066FF 0%, #6C5CE7 100%);
    --gradient-secondary: linear-gradient(135deg, #00B894 0%, #0066FF 100%);
    --gradient-dark: linear-gradient(180deg, #F0F7FF 0%, #E8F4FD 100%);
    --gradient-card: linear-gradient(145deg, #FFFFFF 0%, #F5FAFF 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(0, 102, 255, 0.06) 0%, transparent 70%);
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Courier New', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows - Light Blue Soft */
    --shadow-sm: 0 1px 3px rgba(0, 80, 180, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 80, 180, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 80, 180, 0.1);
    --shadow-xl: 0 16px 48px rgba(0, 80, 180, 0.12);
    --shadow-glow: 0 0 20px rgba(0, 102, 255, 0.15);
    --shadow-glow-green: 0 0 20px rgba(0, 184, 148, 0.15);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Z-index Scale */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-tooltip: 600;
    --z-toast: 700;
    
    /* Layout */
    --container-max: 1400px;
    --header-height: 72px;
    --sidebar-width: 280px;
    --content-padding: var(--space-6);

    /* Scrollbar */
    --scrollbar-track: #F0F7FF;
    --scrollbar-thumb: #D0E3F5;
    --scrollbar-thumb-hover: #B8D4EE;
}