/**
 * SendConnect Design System
 * Modern, minimalist, professional SaaS design
 * Light & Dark Mode Support
 */

:root {
    /* === Light Theme Colors === */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f1f3f5;
    --color-bg-elevated: #ffffff;
    
    --color-text-primary: #1a1d29;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;
    --color-text-inverse: #ffffff;
    
    --color-border: #e5e7eb;
    --color-border-subtle: #f3f4f6;
    --color-border-strong: #d1d5db;
    
    /* Accent Colors - Professional Blue/Turquoise */
    --color-accent-primary: #2563eb;
    --color-accent-primary-hover: #1d4ed8;
    --color-accent-primary-light: #dbeafe;
    --color-accent-primary-dark: #1e40af;
    
    --color-accent-secondary: #0891b2;
    --color-accent-secondary-hover: #0e7490;
    --color-accent-secondary-light: #cffafe;
    
    /* Status Colors */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-success-dark: #059669;
    
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-warning-dark: #d97706;
    
    --color-error: #ef4444;
    --color-error-light: #fee2e2;
    --color-error-dark: #dc2626;
    
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;
    --color-info-dark: #2563eb;
    
    /* Sidebar */
    --color-sidebar-bg: #1a1d29;
    --color-sidebar-hover: #252833;
    --color-sidebar-active: #2563eb;
    --color-sidebar-text: #e5e7eb;
    --color-sidebar-text-active: #ffffff;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* === Dark Theme === */
[data-theme="dark"] {
    --color-bg-primary: #0f1117;
    --color-bg-secondary: #181b24;
    --color-bg-tertiary: #1f2329;
    --color-bg-elevated: #252833;
    
    --color-text-primary: #f9fafb;
    --color-text-secondary: #d1d5db;
    --color-text-tertiary: #9ca3af;
    --color-text-inverse: #1a1d29;
    
    --color-border: #374151;
    --color-border-subtle: #1f2329;
    --color-border-strong: #4b5563;
    
    --color-accent-primary: #3b82f6;
    --color-accent-primary-hover: #60a5fa;
    --color-accent-primary-light: #1e3a8a;
    --color-accent-primary-dark: #1e40af;
    
    --color-accent-secondary: #06b6d4;
    --color-accent-secondary-hover: #22d3ee;
    --color-accent-secondary-light: #164e63;
    
    --color-success: #10b981;
    --color-success-light: #065f46;
    --color-success-dark: #059669;
    
    --color-warning: #f59e0b;
    --color-warning-light: #78350f;
    --color-warning-dark: #d97706;
    
    --color-error: #ef4444;
    --color-error-light: #991b1b;
    --color-error-dark: #dc2626;
    
    --color-info: #3b82f6;
    --color-info-light: #1e3a8a;
    --color-info-dark: #2563eb;
    
    --color-sidebar-bg: #0f1117;
    --color-sidebar-hover: #181b24;
    --color-sidebar-active: #3b82f6;
    --color-sidebar-text: #d1d5db;
    --color-sidebar-text-active: #ffffff;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

/* === Base Styles === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-secondary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* === Utility Classes === */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-info { color: var(--color-info); }

.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-tertiary { background-color: var(--color-bg-tertiary); }
.bg-elevated { background-color: var(--color-bg-elevated); }

.border { border: 1px solid var(--color-border); }
.border-subtle { border: 1px solid var(--color-border-subtle); }
.border-strong { border: 1px solid var(--color-border-strong); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }