/* Theme Switcher - Light Mode, Dark Mode, System Mode */

:root {
    /* Light Mode Colors (default) */
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ecf0f1;
    
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-tertiary: rgba(255,255,255,0.8);
    
    --navbar-bg: #2c3e50;
    --navbar-text: #ffffff;
    --navbar-hover-bg: rgba(255,255,255,0.1);
    
    --border-color: #e1e8ed;
    --border-light: #bdc3c7;
    
    --shadow-light: 0 2px 8px rgba(0,0,0,0.15);
    --shadow-medium: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.1);
    
    --accent-primary: #3498db;
    --accent-primary-hover: #2980b9;
    --accent-danger: #e74c3c;
    --accent-danger-hover: #c0392b;
    --accent-success: #27ae60;
    --accent-success-hover: #229954;
    --accent-warning: #f39c12;
    --accent-warning-hover: #d68910;
    
    /* Input & Form */
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --input-text: #2c3e50;
    --input-placeholder: #9ca3af;
    
    /* Code & Pre */
    --code-bg: #f3f4f6;
    --code-text: #1f2937;
    
    /* Dropdown Menu */
    --dropdown-bg: #ffffff;
    --dropdown-text: #2c3e50;
    --dropdown-hover-bg: #f5f7fa;
    
    /* Badge */
    --badge-admin-bg: #e74c3c;
    --badge-admin-text: #ffffff;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: rgba(255,255,255,0.8);
    
    --navbar-bg: #1a1f35;
    --navbar-text: #f1f5f9;
    --navbar-hover-bg: rgba(255,255,255,0.1);
    
    --border-color: #334155;
    --border-light: #475569;
    
    --shadow-light: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-medium: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.2);
    
    --accent-primary: #3b82f6;
    --accent-primary-hover: #2563eb;
    --accent-danger: #ef4444;
    --accent-danger-hover: #dc2626;
    --accent-success: #22c55e;
    --accent-success-hover: #16a34a;
    --accent-warning: #f59e0b;
    --accent-warning-hover: #d97706;
    
    /* Input & Form */
    --input-bg: #1e293b;
    --input-border: #475569;
    --input-text: #f1f5f9;
    --input-placeholder: #64748b;
    
    /* Code & Pre */
    --code-bg: #1e293b;
    --code-text: #e2e8f0;
    
    /* Dropdown Menu */
    --dropdown-bg: #1e293b;
    --dropdown-text: #f1f5f9;
    --dropdown-hover-bg: #334155;
    
    /* Badge */
    --badge-admin-bg: #ef4444;
    --badge-admin-text: #ffffff;
}

/* Light Mode (explicit) */
[data-theme="light"] {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #ecf0f1;
    
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-tertiary: rgba(255,255,255,0.8);
    
    --navbar-bg: #2c3e50;
    --navbar-text: #ffffff;
    --navbar-hover-bg: rgba(255,255,255,0.1);
    
    --border-color: #e1e8ed;
    --border-light: #bdc3c7;
    
    --shadow-light: 0 2px 8px rgba(0,0,0,0.15);
    --shadow-medium: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-card: 0 1px 3px rgba(0,0,0,0.1);
    
    --accent-primary: #3498db;
    --accent-primary-hover: #2980b9;
    --accent-danger: #e74c3c;
    --accent-danger-hover: #c0392b;
    --accent-success: #27ae60;
    --accent-success-hover: #229954;
    --accent-warning: #f39c12;
    --accent-warning-hover: #d68910;
    
    /* Input & Form */
    --input-bg: #ffffff;
    --input-border: #d1d5db;
    --input-text: #2c3e50;
    --input-placeholder: #9ca3af;
    
    /* Code & Pre */
    --code-bg: #f3f4f6;
    --code-text: #1f2937;
    
    /* Dropdown Menu */
    --dropdown-bg: #ffffff;
    --dropdown-text: #2c3e50;
    --dropdown-hover-bg: #f5f7fa;
    
    /* Badge */
    --badge-admin-bg: #e74c3c;
    --badge-admin-text: #ffffff;
}

/* System Mode - Respects OS preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-tertiary: rgba(255,255,255,0.8);
        
        --navbar-bg: #1a1f35;
        --navbar-text: #f1f5f9;
        --navbar-hover-bg: rgba(255,255,255,0.1);
        
        --border-color: #334155;
        --border-light: #475569;
        
        --shadow-light: 0 2px 8px rgba(0,0,0,0.3);
        --shadow-medium: 0 4px 12px rgba(0,0,0,0.3);
        --shadow-card: 0 1px 3px rgba(0,0,0,0.2);
        
        --accent-primary: #3b82f6;
        --accent-primary-hover: #2563eb;
        --accent-danger: #ef4444;
        --accent-danger-hover: #dc2626;
        --accent-success: #22c55e;
        --accent-success-hover: #16a34a;
        --accent-warning: #f59e0b;
        --accent-warning-hover: #d97706;
        
        /* Input & Form */
        --input-bg: #1e293b;
        --input-border: #475569;
        --input-text: #f1f5f9;
        --input-placeholder: #64748b;
        
        /* Code & Pre */
        --code-bg: #1e293b;
        --code-text: #e2e8f0;
        
        /* Dropdown Menu */
        --dropdown-bg: #1e293b;
        --dropdown-text: #f1f5f9;
        --dropdown-hover-bg: #334155;
        
        /* Badge */
        --badge-admin-bg: #ef4444;
        --badge-admin-text: #ffffff;
    }
}

/* Smooth transitions when theme changes */
html {
    transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* Update all elements to use CSS variables */
input, textarea, select {
    background-color: var(--input-bg);
    border-color: var(--input-border);
    color: var(--input-text);
}

input::placeholder, textarea::placeholder {
    color: var(--input-placeholder);
}

code, pre {
    background-color: var(--code-bg);
    color: var(--code-text);
}

a {
    color: var(--accent-primary);
}

a:hover {
    color: var(--accent-primary-hover);
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-switch-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--navbar-hover-bg);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 8px;
    color: var(--navbar-text);
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.theme-switch-button:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.3);
}

.theme-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--dropdown-bg);
    border-radius: 8px;
    box-shadow: var(--shadow-medium);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s;
    z-index: 1001;
    border: 1px solid var(--border-color);
}

.theme-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    color: var(--dropdown-text);
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    font-size: 0.95rem;
}

.theme-option:hover {
    background: var(--dropdown-hover-bg);
}

.theme-option:first-child {
    border-radius: 8px 8px 0 0;
}

.theme-option:last-child {
    border-radius: 0 0 8px 8px;
}

.theme-option.active {
    background: var(--accent-primary);
    color: white;
    font-weight: 600;
}

.theme-option svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}