/* ===========================================
   CERTIFICATIONS SECTION
   =========================================== */

#certifications {
    position: relative;
}

#certifications::before {
    content: '';
    position: absolute;
    top: 100px;
    right: -10%;
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, rgba(129, 140, 248, 0.10) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

#certifications > * { position: relative; z-index: 1; }

.certification-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
    margin-bottom: 40px;
    padding: 0 20px;
}

.certification-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.4s ease,
                box-shadow 0.4s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    backdrop-filter: blur(10px);
}

/* Top gradient accent */
.certification-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--secondary-color), var(--primary-color), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 3;
}

/* Subtle inner halo on hover */
.certification-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(129, 140, 248, 0.10), transparent 65%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 0;
}

.certification-card:hover {
    transform: translateY(-10px);
    border-color: var(--secondary-color);
    box-shadow: 0 22px 50px -12px rgba(0, 0, 0, 0.65),
                0 0 28px rgba(129, 140, 248, 0.18);
}

.certification-card:hover::before { opacity: 1; }
.certification-card:hover::after  { opacity: 1; }

/* === Preview === */
.certification-preview {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

.certification-preview img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 18px;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-glass);
    filter: brightness(0.85) contrast(1.05) saturate(1.05);
    transition: filter 0.4s ease, transform 0.4s ease, border-color 0.4s ease;
}

.certification-card:hover .certification-preview img {
    filter: brightness(1) contrast(1.08) saturate(1.1);
    transform: scale(1.02);
    border-color: rgba(129, 140, 248, 0.35);
}

.certification-preview h4 {
    font-size: 17px;
    color: var(--text-primary);
    margin: 0 0 6px 0;
    font-weight: 600;
    line-height: 1.4;
    text-align: left;
    transition: color 0.3s ease;
}

.certification-card:hover .certification-preview h4 {
    background: linear-gradient(135deg, var(--text-primary), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.certification-issuer {
    display: inline-block;
    align-self: flex-start;
    font-size: 11px;
    color: var(--primary-color);
    font-weight: 600;
    margin: 0 0 14px;
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    letter-spacing: 1.4px;
    padding: 4px 10px;
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 4px;
    background: rgba(56, 189, 248, 0.06);
}

.certification-brief {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0 0 18px;
    flex-grow: 1;
    line-height: 1.6;
}

/* === Button === */
.view-cert-btn {
    display: block;
    width: 100%;
    padding: 13px;
    background: transparent;
    color: var(--primary-color);
    border: none;
    border-top: 1px solid var(--border-glass);
    text-align: center;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    z-index: 2;
}

.view-cert-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.18), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.view-cert-btn:hover {
    background: rgba(56, 189, 248, 0.08);
    color: var(--text-light);
    letter-spacing: 2px;
}

.view-cert-btn:hover::before { transform: translateX(100%); }

@media (max-width: 768px) {
    .certification-grid { grid-template-columns: 1fr; gap: 20px; padding: 0 10px; }
}