/* Dashboard Layout */
.dashboard-container {
    display: flex;
    min-height: 100vh;
    background: #f1f5f9;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: white;
    box-shadow: 2px 0 5px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s;
    margin: 0.25rem 0;
}

.sidebar-nav a:hover {
    background: #f8fafc;
    color: var(--primary-color);
}

.sidebar-nav a.active {
    background: linear-gradient(to right, rgba(99,102,241,0.1), transparent);
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

.sidebar-nav .icon {
    margin-right: 0.75rem;
    font-size: 1.25rem;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid #e2e8f0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.user-name {
    font-weight: 600;
    color: var(--text-dark);
}

.user-email {
    font-size: 0.875rem;
    color: var(--text-light);
}

.logout-btn {
    width: 100%;
    padding: 0.5rem;
    background: #fee2e2;
    color: #ef4444;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s;
}

.logout-btn:hover {
    background: #fecaca;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.header-actions {
    display: flex;
    gap: 1rem;
}

.points-badge, .streak-badge {
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Progress Stats */
.progress-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-light);
}

/* Subject Cards */
.subject-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.subject-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s;
}

.subject-card:hover {
    transform: translateY(-5px);
}

.subject-header {
    padding: 1rem;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.subject-progress {
    padding: 1rem;
}

.progress-bar {
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    margin: 0.5rem 0;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 0.3s;
}

.subject-actions {
    padding: 1rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    gap: 0.5rem;
}

/* Recommendations */
.recommendation-list {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.recommendation-item {
    background: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--box-shadow);
}

/* Activity Timeline */
.activity-timeline {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

.activity-item {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid #e2e8f0;
}

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

.activity-icon {
    width: 40px;
    height: 40px;
    background: #f1f5f9;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.activity-content {
    flex: 1;
}

.activity-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.activity-time {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Badges Grid */
.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.badge-item {
    background: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s;
}

.badge-item:hover {
    transform: scale(1.05);
}

.badge-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.badge-name {
    font-size: 0.875rem;
    font-weight: 600;
}

/* Subject Grid */
.subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 1rem 0;
}

.add-subject-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    transition: transform 0.3s;
    grid-column: span 2;
}

.add-subject-card:hover {
    transform: translateY(-5px);
}

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

/* Profile Styles */
.profile-header {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 2rem;
}

.profile-cover {
    height: 200px;
    overflow: hidden;
}

.profile-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-info {
    padding: 1.5rem;
    position: relative;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 4px solid white;
    margin-top: -50px;
    background: white;
}

.profile-details {
    flex: 1;
}

.profile-bio {
    color: var(--text-light);
    margin-top: 0.5rem;
}

.profile-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-large {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
}

.profile-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 0.5rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-light);
    position: relative;
}

.tab-btn.active {
    color: var(--primary-color);
    font-weight: 600;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Certificates Grid */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.certificate-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: transform 0.3s;
}

.certificate-card:hover {
    transform: translateY(-5px);
}

.certificate-preview {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.certificate-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    opacity: 0;
    transition: opacity 0.3s;
}

.certificate-card:hover .certificate-overlay {
    opacity: 1;
}

.certificate-overlay button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    background: white;
    color: var(--text-dark);
}

.certificate-info {
    padding: 1.5rem;
}

.certificate-info h3 {
    margin-bottom: 0.5rem;
}

.certificate-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
}

.badge {
    background: #f1f5f9;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.875rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: white;
    border-radius: var(--border-radius);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h2 {
    margin-bottom: 1rem;
}

.empty-state p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
    }
    
    .sidebar .logo span,
    .sidebar-nav a span:not(.icon),
    .user-info div,
    .logout-btn span {
        display: none;
    }
    
    .main-content {
        margin-left: 80px;
    }
    
    .sidebar-nav a {
        justify-content: center;
    }
    
    .sidebar-nav .icon {
        margin-right: 0;
    }
}

@media (max-width: 768px) {
    .main-content {
        margin-left: 0;
        padding: 1rem;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
}