/* =================================================================
   Phase 2: Interactive Certification Showcase
   Badge gallery with hover effects, tooltips, and credential verification
   ================================================================= */

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

#certifications {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

#certifications::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 80% 20%, var(--platform-bg) 0%, transparent 40%),
        radial-gradient(circle at 20% 80%, var(--security-bg) 0%, transparent 40%);
    opacity: 0.5;
    pointer-events: none;
}

.certifications {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    position: relative;
    z-index: 1;
}

/* ===== CERTIFICATION ITEM ===== */

.certification-item {
    position: relative;
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2rem 1.5rem;
    text-align: center;
    border: 2px solid var(--border-primary);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    overflow: hidden;
}

/* Shine effect */
.certification-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transform: translateX(-100%) translateY(-100%);
    transition: transform 0.6s ease;
}

.certification-item:hover::before {
    transform: translateX(100%) translateY(100%);
}

.certification-item:hover {
    transform: translateY(-12px) scale(1.05);
    border-color: var(--accent-primary);
    box-shadow:
        0 20px 50px rgba(0, 0, 0, 0.2),
        0 0 0 1px var(--accent-primary);
}

/* ===== BADGE IMAGE ===== */

.certification-badge {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.certification-badge img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

.certification-item:hover .certification-badge img {
    transform: rotateY(10deg) rotateX(-5deg) scale(1.1);
    filter: drop-shadow(0 8px 24px rgba(245, 128, 78, 0.3));
}

/* Badge glow effect */
.certification-badge::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: -1;
}

.certification-item:hover .certification-badge::after {
    opacity: 0.2;
    animation: badgeGlow 2s ease-in-out infinite;
}

@keyframes badgeGlow {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
    }
}

/* ===== BADGE CONTENT ===== */

.certification-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.certification-item:hover .certification-name {
    color: var(--accent-primary);
}

.certification-issuer {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.certification-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* ===== ELITE BADGE (Kubestronaut) ===== */

.certification-item.elite {
    background: linear-gradient(135deg, var(--card-bg), var(--platform-bg));
    border-color: var(--platform-accent);
}

.certification-item.elite::after {
    content: '★ Elite';
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--platform-accent);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ===== VERIFIED BADGE ===== */

.verification-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--strategy-bg);
    color: var(--strategy-accent);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.5rem;
}

.verification-badge i {
    font-size: 12px;
}

/* ===== TOOLTIP ===== */

.certification-tooltip {
    position: absolute;
    bottom: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--bg-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    padding: 16px 20px;
    min-width: 250px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 100;
}

.certification-tooltip::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: var(--accent-primary);
}

.certification-item:hover .certification-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.tooltip-title {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 1rem;
}

.tooltip-details {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.tooltip-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    margin-top: 12px;
    transition: gap 0.3s ease;
}

.tooltip-link:hover {
    gap: 10px;
}

.tooltip-link i {
    font-size: 12px;
}

/* ===== FILTER BUTTONS ===== */

.certification-filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.filter-btn {
    background: var(--card-bg);
    border: 2px solid var(--border-primary);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 24px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(245, 128, 78, 0.3);
}

/* ===== STAGGER ANIMATION ===== */

.certification-item {
    animation: certFadeIn 0.6s ease forwards;
    opacity: 0;
}

.certification-item:nth-child(1) { animation-delay: 0.1s; }
.certification-item:nth-child(2) { animation-delay: 0.2s; }
.certification-item:nth-child(3) { animation-delay: 0.3s; }
.certification-item:nth-child(4) { animation-delay: 0.4s; }
.certification-item:nth-child(5) { animation-delay: 0.5s; }
.certification-item:nth-child(6) { animation-delay: 0.6s; }
.certification-item:nth-child(7) { animation-delay: 0.7s; }
.certification-item:nth-child(8) { animation-delay: 0.8s; }

@keyframes certFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== CREDENTIAL LINK ===== */

.credential-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.certification-item:hover .credential-link {
    opacity: 1;
    transform: translateY(0);
}

.credential-link i {
    margin-left: 4px;
    transition: transform 0.3s ease;
}

.credential-link:hover i {
    transform: translateX(4px);
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 1024px) {
    .certifications {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 1.5rem;
    }

    .certification-badge {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 768px) {
    .certifications {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .certification-item {
        padding: 1.5rem 1rem;
    }

    .certification-badge {
        width: 80px;
        height: 80px;
    }

    .certification-name {
        font-size: 0.95rem;
    }

    .certification-issuer,
    .certification-date {
        font-size: 0.8rem;
    }

    .certification-tooltip {
        display: none;
    }
}

@media (max-width: 480px) {
    .certifications {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .certification-item {
        padding: 1rem 0.75rem;
    }

    .certification-badge {
        width: 60px;
        height: 60px;
    }

    .certification-name {
        font-size: 0.85rem;
    }

    .certification-item.elite::after {
        font-size: 0.65rem;
        padding: 3px 8px;
    }
}

/* ===== DARK THEME ADJUSTMENTS ===== */

[data-theme="dark"] .certification-item {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .certification-item.elite {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.6), var(--platform-bg));
}

[data-theme="dark"] .certification-tooltip {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
}

[data-theme="dark"] .filter-btn {
    background: rgba(30, 41, 59, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
}