/**
 * WP Master Panel - Clean Admin Pro Theme
 * Version: 4.0.0
 * A professional, clean, and modern admin theme
 * 
 * Features:
 * - Clean, minimal design
 * - Dark/Light mode with smooth transition
 * - Fully responsive (mobile, tablet, desktop)
 * - Tailwind CSS utility-first approach
 * - Fast performance
 * - Consistent UI across all pages
 */

/* ===========================
   CSS VARIABLES (DESIGN TOKENS)
=========================== */

:root {
    /* Colors - Light Mode */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #dbeafe;
    
    --color-success: #10b981;
    --color-success-hover: #059669;
    --color-success-light: #d1fae5;
    
    --color-warning: #f59e0b;
    --color-warning-hover: #d97706;
    --color-warning-light: #fef3c7;
    
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-danger-light: #fee2e2;
    
    --color-info: #06b6d4;
    --color-info-hover: #0891b2;
    --color-info-light: #cffafe;
    
    /* Neutrals - Light Mode */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;
    
    --color-text-primary: #111827;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;
    
    --color-border: #e5e7eb;
    --color-border-hover: #d1d5db;
    
    --color-sidebar-bg: #1f2937;
    --color-sidebar-text: #d1d5db;
    --color-sidebar-active: #3b82f6;
    
    /* 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 */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    
    /* Border Radius */
    --radius-sm: 0.375rem;   /* 6px */
    --radius-md: 0.5rem;     /* 8px */
    --radius-lg: 0.75rem;    /* 12px */
    --radius-xl: 1rem;       /* 16px */
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-bg-primary: #111827;
    --color-bg-secondary: #1f2937;
    --color-bg-tertiary: #374151;
    
    --color-text-primary: #f9fafb;
    --color-text-secondary: #d1d5db;
    --color-text-tertiary: #9ca3af;
    
    --color-border: #374151;
    --color-border-hover: #4b5563;
    
    --color-sidebar-bg: #0f172a;
    --color-sidebar-text: #cbd5e1;
    --color-sidebar-active: #3b82f6;
    
    --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, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
}

/* ===========================
   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-sans);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    line-height: 1.5;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ===========================
   LAYOUT
=========================== */

.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
    width: 260px;
    background-color: var(--color-sidebar-bg);
    color: var(--color-sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    transition: transform var(--transition-normal);
    z-index: 40;
    box-shadow: var(--shadow-lg);
}

.admin-sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.admin-sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
}

.admin-sidebar-nav {
    flex: 1;
    padding: var(--spacing-md);
}

.admin-nav-item {
    margin-bottom: var(--spacing-xs);
}

.admin-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--color-sidebar-text);
    text-decoration: none;
    transition: all var(--transition-fast);
    font-size: 0.925rem;
}

.admin-nav-link:hover {
    background-color: rgba(255, 255, 255, 0.05);
    color: white;
}

.admin-nav-link.active {
    background-color: var(--color-primary);
    color: white;
}

.admin-nav-link svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

/* Main Content */
.admin-main {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.admin-header {
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 30;
    box-shadow: var(--shadow-sm);
}

.admin-header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.admin-content {
    flex: 1;
    padding: var(--spacing-xl);
}

.admin-footer {
    background-color: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-xl);
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ===========================
   COMPONENTS
=========================== */

/* Cards */
.card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-fast);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg-secondary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.925rem;
    font-weight: 500;
    line-height: 1;
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background-color: var(--color-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background-color: var(--color-success-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background-color: var(--color-warning);
    color: white;
}

.btn-warning:hover:not(:disabled) {
    background-color: var(--color-warning-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--color-danger-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-border-hover);
}

.btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1;
}

.badge-primary {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-success {
    background-color: var(--color-success-light);
    color: var(--color-success);
}

.badge-warning {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.badge-danger {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

.badge-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.925rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.925rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead {
    background-color: var(--color-bg-secondary);
}

.table th {
    padding: var(--spacing-md);
    text-align: left;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table td {
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.table tbody tr {
    transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
    background-color: var(--color-bg-secondary);
}

/* Alerts */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.925rem;
    display: flex;
    align-items: start;
    gap: var(--spacing-sm);
}

.alert-info {
    background-color: var(--color-info-light);
    color: var(--color-info-hover);
    border: 1px solid var(--color-info);
}

.alert-success {
    background-color: var(--color-success-light);
    color: var(--color-success-hover);
    border: 1px solid var(--color-success);
}

.alert-warning {
    background-color: var(--color-warning-light);
    color: var(--color-warning-hover);
    border: 1px solid var(--color-warning);
}

.alert-danger {
    background-color: var(--color-danger-light);
    color: var(--color-danger-hover);
    border: 1px solid var(--color-danger);
}

/* Dark Mode Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--color-border-hover);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* Loading States */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===========================
   UTILITIES
=========================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.mb-4 { margin-bottom: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-md); }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--spacing-sm); }
.gap-4 { gap: var(--spacing-md); }

/* ===========================
   RESPONSIVE
=========================== */

@media (max-width: 1024px) {
    .admin-sidebar {
        transform: translateX(-100%);
    }
    
    .admin-sidebar.open {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .admin-content {
        padding: var(--spacing-md);
    }
}

@media (max-width: 640px) {
    .admin-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .admin-content {
        padding: var(--spacing-sm);
    }
    
    .card-header,
    .card-body,
    .card-footer {
        padding: var(--spacing-md);
    }
}