/* AlphaBuddy AI - Consistent Theme System */

:root {
    /* Brand Colors */
    --brand-primary: #42a5f5;
    --brand-secondary: #66bb6a;
    --brand-accent: #ff9800;
    --brand-purple: #ab47bc;
    
    /* Background Colors */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-card: #161b22;
    
    /* Text Colors */
    --text-primary: #f0f6fc;
    --text-secondary: #7d8590;
    --text-muted: #484f58;
    
    /* Border Colors */
    --border-primary: #30363d;
    --border-secondary: #21262d;
    
    /* Status Colors */
    --success: #4caf50;
    --success-dark: #388e3c;
    --warning: #ff9800;
    --warning-dark: #f57c00;
    --danger: #f44336;
    --danger-dark: #d32f2f;
    --info: #42a5f5;
    --info-dark: #1976d2;
    
    /* Spacing Scale (8px base) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 50%;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, 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: 32px;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.4);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
    
    /* Z-index Scale */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Child-Friendly Theme Overrides */
.child-theme {
    --brand-primary: #ff6b9d;
    --brand-secondary: #ffd93d;
    --bg-primary: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #fecfef 100%);
    --text-primary: #333;
    --border-primary: #f0f0f0;
    --radius-md: 15px;
    --radius-lg: 20px;
}

/* Utility Classes */
.theme-card {
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
}

.theme-btn-primary {
    background: linear-gradient(135deg, var(--brand-primary), var(--info-dark));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.theme-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    opacity: 0.9;
}

.theme-btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-base);
}

.theme-btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--brand-primary);
}

.theme-input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    width: 100%;
}

.theme-input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 2px rgba(66, 165, 245, 0.1);
}

.theme-input::placeholder {
    color: var(--text-secondary);
}

/* Modal Overrides for consistent z-index */
.modal-backdrop {
    z-index: var(--z-modal-backdrop) !important;
}

.modal {
    z-index: var(--z-modal) !important;
}

.modal-content {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.modal-header {
    border-bottom: 1px solid var(--border-primary);
}

.modal-footer {
    border-top: 1px solid var(--border-primary);
}

/* Accessibility */
*:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Support */
@media (prefers-contrast: high) {
    :root {
        --border-primary: #ffffff;
        --text-secondary: #ffffff;
    }
}

/* Responsive Typography */
@media (max-width: 768px) {
    :root {
        --font-size-3xl: 24px;
        --font-size-2xl: 20px;
        --font-size-xl: 18px;
    }
}