/* ============================================
   CERTIFICATES SECTION - MODERN DESIGN
   ============================================ */

.certificate-card {
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.9), rgba(20, 20, 35, 0.9));
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.certificate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(255, 0, 255, 0.05));
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.certificate-card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.5);
    box-shadow:
        0 20px 40px rgba(0, 212, 255, 0.2),
        0 0 60px rgba(0, 212, 255, 0.1);
}

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

/* PDF Preview */
.certificate-preview {
    position: relative;
    width: 100%;
    height: 280px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    overflow: hidden;
}

.pdf-preview {
    width: 100%;
    height: 100%;
    border: none;
    pointer-events: none;
    transform: scale(1.1);
    filter: brightness(0.9);
    transition: all 0.4s ease;
}

.certificate-card:hover .pdf-preview {
    transform: scale(1.15);
    filter: brightness(1);
}

.certificate-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.8) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s ease;
    gap: 0.5rem;
}

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

.certificate-overlay i {
    font-size: 3rem;
    color: #00d4ff;
    animation: pulse 2s ease-in-out infinite;
}

.certificate-overlay span {
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

/* Placeholder for certificates without PDF */
.certificate-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(255, 0, 255, 0.1));
}

.certificate-placeholder i {
    font-size: 5rem;
    color: rgba(0, 212, 255, 0.3);
}

/* Certificate Content */
.certificate-content {
    padding: 1.5rem;
}

.certificate-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.certificate-issuer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #00d4ff;
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.certificate-issuer i {
    font-size: 1.1rem;
}

.certificate-meta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.certificate-duration,
.certificate-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.certificate-duration i,
.certificate-date i {
    color: rgba(0, 212, 255, 0.6);
    font-size: 1rem;
}

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

.cert-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cert-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.cert-btn:hover::before {
    width: 300px;
    height: 300px;
}

.cert-btn i {
    font-size: 1.1rem;
    transition: transform 0.3s ease;
}

.cert-btn:hover i {
    transform: translateY(-2px);
}

.cert-btn-primary {
    background: linear-gradient(135deg, #00d4ff, #00a8cc);
    color: #000;
    border: none;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.cert-btn-primary:hover {
    box-shadow: 0 6px 25px rgba(0, 212, 255, 0.5);
    transform: translateY(-2px);
}

.cert-btn-outline {
    background: transparent;
    color: #00d4ff;
    border: 2px solid #00d4ff;
}

.cert-btn-outline:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: #00f0ff;
    color: #00f0ff;
    transform: translateY(-2px);
}

/* Responsive */
@media (max-width: 768px) {
    .certificate-card {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 auto;
    }

    .certificate-preview {
        height: 250px;
    }

    .certificate-content {
        padding: 1.25rem;
    }

    .certificate-title {
        font-size: 1.3rem;
        margin-bottom: 0.875rem;
    }

    .certificate-issuer {
        font-size: 1rem;
        margin-bottom: 0.875rem;
    }

    .certificate-meta {
        gap: 0.625rem;
        margin-bottom: 1.25rem;
    }

    .certificate-actions {
        flex-direction: column;
        gap: 0.625rem;
    }

    .cert-btn {
        width: 100%;
        padding: 0.875rem 1.25rem;
    }
}

@media (max-width: 480px) {
    .certificate-card {
        border-radius: 12px;
    }

    .certificate-preview {
        height: 200px;
    }

    .certificate-content {
        padding: 1rem;
    }

    .certificate-title {
        font-size: 1.15rem;
        margin-bottom: 0.75rem;
    }

    .certificate-issuer {
        font-size: 0.95rem;
        margin-bottom: 0.75rem;
    }

    .certificate-meta {
        gap: 0.5rem;
        margin-bottom: 1rem;
    }

    .certificate-duration,
    .certificate-date {
        font-size: 0.875rem;
    }

    .cert-btn {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }

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