/* Certificates Page Styles */
.certificates-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.overview-card {
    background: var(--dark-bg);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.overview-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-green);
}

.overview-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-green), #00b894);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.overview-content h3 {
    color: var(--text-gray);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.overview-number {
    color: var(--text-white);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.overview-label {
    color: var(--text-gray);
    font-size: 0.75rem;
}

/* Certificates Tabs */
.certificates-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    background: var(--dark-bg);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 12px;
    padding: 0.5rem;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-gray);
    padding: 1rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.tab-btn:hover:not(.active) {
    background: rgba(0, 212, 170, 0.1);
    color: var(--text-white);
}

.tab-btn i {
    font-size: 1rem;
}

/* Tab Content */
.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: 1.5rem;
}

.certificate-card {
    background: var(--dark-bg);
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.certificate-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-green);
    box-shadow: 0 8px 25px rgba(0, 212, 170, 0.15);
}

.certificate-card.earned {
    border-color: rgba(0, 212, 170, 0.4);
}

.certificate-card.progress {
    border-color: rgba(255, 193, 7, 0.4);
}

.certificate-card.available {
    border-color: rgba(255, 255, 255, 0.1);
}

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

.certificate-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-green);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
}

.certificate-status {
    font-size: 1.5rem;
}

.certificate-card.earned .certificate-status {
    color: var(--primary-green);
}

.certificate-card.progress .certificate-status {
    color: #ffc107;
}

.certificate-card.available .certificate-status {
    color: var(--text-gray);
}

.certificate-content h3 {
    color: var(--text-white);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.certificate-content p {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.5;
}

/* Progress Info */
.progress-info {
    margin-bottom: 1rem;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.progress-header span {
    color: var(--text-white);
    font-size: 0.875rem;
    font-weight: 500;
}

.progress-bar-certificate {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-green), #00b894);
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Certificate Meta */
.certificate-meta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.certificate-date,
.certificate-score,
.certificate-duration,
.certificate-level {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-gray);
    font-size: 0.875rem;
}

.certificate-date i,
.certificate-score i,
.certificate-duration i,
.certificate-level i {
    color: var(--primary-green);
    width: 16px;
}

/* Certificate Actions */
.certificate-actions {
    display: flex;
    gap: 0.75rem;
}

.certificate-actions .btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    background: #00b894;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--darker-bg);
    color: var(--text-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-green);
}

/* Certificate Badge */
.certificate-card.earned::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 40px 40px 0;
    border-color: transparent var(--primary-green) transparent transparent;
}

.certificate-card.earned::after {
    content: '✓';
    position: absolute;
    top: 5px;
    right: 8px;
    color: white;
    font-weight: bold;
    font-size: 0.875rem;
}

/* Animation for certificate cards */
.certificate-card {
    opacity: 0;
    transform: translateY(20px);
    animation: slideInUp 0.6s ease forwards;
}

.certificate-card:nth-child(1) { animation-delay: 0.1s; }
.certificate-card:nth-child(2) { animation-delay: 0.2s; }
.certificate-card:nth-child(3) { animation-delay: 0.3s; }
.certificate-card:nth-child(4) { animation-delay: 0.4s; }

@keyframes slideInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .certificates-overview {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .certificates-tabs {
        flex-direction: column;
    }
    
    .certificates-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .certificates-overview {
        grid-template-columns: 1fr;
    }
    
    .overview-card {
        flex-direction: column;
        text-align: center;
    }
    
    .certificate-actions {
        flex-direction: column;
    }
    
    .certificate-meta {
        flex-direction: column;
    }
    
    .progress-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
}

/* Loading animation for progress bars */
.progress-fill {
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Hover effects for overview cards */
.overview-card:hover .overview-icon {
    transform: scale(1.1);
}

.overview-card:hover .overview-number {
    color: var(--primary-green);
}

/* Tab transition effects */
.tab-content {
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.tab-content.active {
    opacity: 1;
    transform: translateY(0);
}