/**
 * AI-Powered Assessment System - Premium Styles
 * RTL Arabic Design System
 */

/* ============================================
   IMPORTS & FONTS
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;600;700;900&family=Tajawal:wght@400;500;700&display=swap');

/* ============================================
   CSS VARIABLES & DESIGN TOKENS
   ============================================ */
:root {
    /* Primary Colors */
    --color-primary: #1e3a8a;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1e293b;
    
    /* Secondary Colors */
    --color-secondary: #0d9488;
    --color-secondary-light: #14b8a6;
    --color-secondary-dark: #0f766e;
    
    /* Status Colors */
    --color-success: #059669;
    --color-success-light: #10b981;
    --color-warning: #f59e0b;
    --color-error: #e11d48;
    --color-info: #3b82f6;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Background Gradients */
    --gradient-primary: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-secondary: linear-gradient(135deg, #0d9488 0%, #14b8a6 100%);
    --gradient-success: linear-gradient(135deg, #059669 0%, #10b981 100%);
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-family: 'Cairo', 'Tajawal', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --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;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-900);
    background: var(--color-gray-50);
    direction: rtl;
    text-align: right;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-900);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-md);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    font-family: var(--font-family);
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}

.btn-secondary:hover {
    background: var(--color-gray-200);
}

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

.btn-danger {
    background: linear-gradient(135deg, #e11d48 0%, #f43f5e 100%);
    color: white;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-gray-700);
}

.form-control, input, select, textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    background: white;
    transition: all var(--transition-base);
}

.form-control:focus, input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

/* ============================================
   LOGIN PAGE
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    padding: var(--spacing-lg);
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.login-header h1 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.login-header p {
    color: var(--color-gray-600);
    margin: 0;
}

.login-footer {
    text-align: center;
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-gray-200);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

.version {
    font-size: var(--font-size-xs);
    margin: 0;
}

/* ============================================
   DASHBOARD LAYOUT
   ============================================ */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: var(--color-gray-900);
    color: white;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: 1rem;
    color: var(--color-gray-300);
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    font-weight: 500;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateX(-5px);
}

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

.nav-item .icon {
    font-size: var(--font-size-xl);
}

.main-content {
    flex: 1;
    padding: var(--spacing-2xl);
    overflow-y: auto;
}

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-header h1 {
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: var(--color-gray-600);
    margin: 0;
}

/* ============================================
   STATS GRID
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    font-size: 3rem;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

/* ============================================
   CARDS & SECTIONS
   ============================================ */
.quick-actions, .recent-activity {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============================================
   TABLES
   ============================================ */
.activity-table {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

thead {
    background: var(--color-gray-100);
}

th, td {
    padding: 1rem;
    text-align: right;
    border-bottom: 1px solid var(--color-gray-200);
}

th {
    font-weight: 700;
    color: var(--color-gray-700);
}

tr:hover {
    background: var(--color-gray-50);
}

/* ============================================
   BADGES & STATUS
   ============================================ */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    background: var(--color-gray-200);
    color: var(--color-gray-700);
    margin: 0 0.25rem;
}

.status-badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.status-ongoing {
    background: #fef3c7;
    color: #92400e;
}

.status-completed {
    background: #d1fae5;
    color: #065f46;
}

.status-abandoned {
    background: #fee2e2;
    color: #991b1b;
}

/* ============================================
   ALERTS & MESSAGES
   ============================================ */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-right: 4px solid var(--color-success);
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-right: 4px solid var(--color-error);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-right: 4px solid var(--color-warning);
}

.error-message {
    color: var(--color-error);
    background: #fee2e2;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .dashboard-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }