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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8fafc;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    color: #667eea;
    font-size: 1.8rem;
    font-weight: 700;
}

.nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-link {
    color: #666;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-outline {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

/* Main Content */
.main {
    padding: 2rem 0;
}

/* Welcome Section */
.welcome {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    border-radius: 15px;
    margin-bottom: 2rem;
    text-align: center;
}

.welcome h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.welcome p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Dashboard */
.dashboard {
    margin-bottom: 3rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-3px);
}

.stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
}

.stat-content h3 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 0.25rem;
}

.stat-content p {
    color: #666;
    font-size: 0.9rem;
}

.level-card {
    margin-top: 1.5rem;
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.level-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.level-label {
    color: #666;
    font-weight: 600;
}

.level-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 700;
}

.level-progress {
    margin-top: 1rem;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: #e1e5e9;
    border-radius: 6px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

.level-meta {
    display: flex;
    justify-content: space-between;
    color: #666;
    font-size: 0.9rem;
    margin-top: 0.35rem;
}

/* Quick Actions */
.quick-actions {
    margin-bottom: 3rem;
}

.quick-actions h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.action-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    cursor: pointer;
}

.action-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.action-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.action-card h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.action-card p {
    color: #666;
    font-size: 0.9rem;
}

/* Recent Activity */
.recent-activity h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #333;
}

.activity-list {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #f1f5f9;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
}

.activity-content p {
    color: #333;
    margin-bottom: 0.25rem;
}

.activity-content small {
    color: #666;
    font-size: 0.8rem;
}

/* Dark Theme */
.theme-dark .level-card {
    background: #111827;
    border: 1px solid #1f2937;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.theme-dark .level-label {
    color: #94a3b8;
}

.theme-dark .level-header h3 {
    color: #e2e8f0 !important;
}

.theme-dark .level-header small {
    color: #94a3b8 !important;
}

.theme-dark .level-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.theme-dark .level-meta {
    color: #94a3b8;
}

.theme-dark .level-meta span {
    color: #cbd5e1 !important;
}

.theme-dark .stat-content h3 {
    color: #e2e8f0;
}

.theme-dark .stat-content p {
    color: #94a3b8;
}

.theme-dark .quick-actions h3 {
    color: #e2e8f0;
}

.theme-dark .recent-activity h3 {
    color: #e2e8f0;
}

.theme-dark .activity-content p {
    color: #e2e8f0;
}

.theme-dark .activity-content small {
    color: #94a3b8;
}

.theme-dark .activity-item {
    border-bottom-color: #1f2937;
}

/* Dark Theme */
.theme-dark .level-card {
    background: #111827;
    border: 1px solid #1f2937;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.theme-dark .level-label {
    color: #94a3b8;
}

.theme-dark .level-header h3 {
    color: #e2e8f0 !important;
}

.theme-dark .level-header small {
    color: #94a3b8 !important;
}

.theme-dark .level-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.theme-dark .level-meta {
    color: #94a3b8;
}

.theme-dark .level-meta span {
    color: #cbd5e1 !important;
}


/* Responsive */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .welcome h2 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
    }
}