/* ===== Certifications Page Styles ===== */

/* Page Hero */
.certs-hero {
    padding: 140px 0 60px;
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
}

.certs-hero-content {
    max-width: 700px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 2rem;
    padding: 0.5rem 1rem 0.5rem 0.75rem;
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.back-link:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.03);
    transform: translateX(-4px);
}

.certs-hero-description {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.85;
    margin-top: -1rem;
}

.cert-stats-row {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-top: 2.5rem;
    padding: 1.25rem 1.75rem;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    box-shadow: var(--card-shadow);
}

.cert-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.cert-stat-number {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.cert-stat-label {
    font-size: 0.68rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 600;
}

.cert-stat-divider {
    width: 1px;
    height: 32px;
    background: var(--card-border);
}

/* ===== Filter Bar ===== */
.certs-filter-section {
    position: sticky;
    top: 72px;
    z-index: 100;
    padding: 1rem 0;
    background: rgba(245, 245, 247, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
}

.certs-filter-bar {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.certs-filter-bar::-webkit-scrollbar {
    display: none;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border: 1px solid var(--card-border);
    border-radius: 9px;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-primary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition-smooth);
}

.filter-btn:hover {
    border-color: var(--accent-border-hover);
    color: var(--text-primary);
    background: var(--bg-card);
}

.filter-btn.active {
    background: var(--accent-primary);
    border-color: transparent;
    color: var(--bg-card);
}

.filter-btn.active svg {
    stroke: var(--bg-card);
}

/* ===== Certificate Content Section ===== */
.certs-content-section {
    padding: 3rem 0 6rem;
    position: relative;
    z-index: 1;
}

/* ===== Domain Group ===== */
.cert-domain-group {
    margin-bottom: 4rem;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.cert-domain-group.hidden {
    display: none;
}

.domain-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--card-border);
    flex-wrap: wrap;
}

.domain-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    /* Uniform neutral for all domains */
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

/* Override all colored domain icons */
.domain-icon.ai-ml,
.domain-icon.web-dev,
.domain-icon.python,
.domain-icon.cloud,
.domain-icon.data,
.domain-icon.other,
.domain-icon.exams {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.cert-domain-group:hover .domain-icon {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.domain-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
}

.domain-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

.domain-count {
    margin-left: auto;
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
    padding: 0.35rem 0.9rem;
    border-radius: 20px;
    white-space: nowrap;
    font-weight: 500;
}

/* ===== Certificate Cards Grid ===== */
.cert-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 1.25rem;
}

.cert-detail-card {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition-smooth);
    box-shadow: var(--card-shadow);
}

.cert-detail-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-border-hover);
    box-shadow: var(--card-shadow-hover);
}

/* Certificate Image */
.cert-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--bg-secondary);
    cursor: pointer;
}

.cert-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.cert-detail-card:hover .cert-image-wrapper img {
    transform: scale(1.04);
}

.cert-image-overlay {
    position: absolute;
    inset: 0;
    background: rgba(26, 26, 26, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

.cert-image-wrapper:hover .cert-image-overlay {
    opacity: 1;
}

.view-cert {
    padding: 0.55rem 1.35rem;
    background: var(--accent-primary);
    color: var(--bg-card);
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 600;
    transform: translateY(6px);
    transition: transform var(--transition-smooth);
}

.cert-image-wrapper:hover .view-cert {
    transform: translateY(0);
}

/* NPTEL placeholder */
.nptel-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-cert {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-muted);
}

.placeholder-cert span {
    font-size: 0.82rem;
    font-weight: 500;
}

/* Certificate Info */
.cert-detail-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.cert-company-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
    width: fit-content;
    font-size: 0;
    /* Uniform neutral badge */
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
}

.company-name {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

/* Override all company badge colors to neutral */
.cert-company-badge.oracle,
.cert-company-badge.microsoft,
.cert-company-badge.infosys,
.cert-company-badge.sap,
.cert-company-badge.huggingface,
.cert-company-badge.walmart,
.cert-company-badge.jpmorgan,
.cert-company-badge.deloitte,
.cert-company-badge.mastercard,
.cert-company-badge.tata,
.cert-company-badge.tcs,
.cert-company-badge.nptel,
.cert-company-badge.openhpi,
.cert-company-badge.mindluster {
    background: var(--bg-secondary);
    border: 1px solid var(--card-border);
}

.cert-company-badge.oracle .company-name,
.cert-company-badge.microsoft .company-name,
.cert-company-badge.infosys .company-name,
.cert-company-badge.sap .company-name,
.cert-company-badge.huggingface .company-name,
.cert-company-badge.walmart .company-name,
.cert-company-badge.jpmorgan .company-name,
.cert-company-badge.deloitte .company-name,
.cert-company-badge.mastercard .company-name,
.cert-company-badge.tata .company-name,
.cert-company-badge.tcs .company-name,
.cert-company-badge.nptel .company-name,
.cert-company-badge.openhpi .company-name,
.cert-company-badge.mindluster .company-name {
    color: var(--text-secondary);
}

.cert-detail-title {
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
}

.cert-detail-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.cert-detail-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--card-border);
}

.cert-detail-date {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    color: var(--text-muted);
}

.cert-level {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.25rem 0.7rem;
    border-radius: 20px;
}

/* Uniform neutral levels */
.cert-level.professional,
.cert-level.associate,
.cert-level.intermediate,
.cert-level.completion,
.cert-level.certified {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--card-border);
}

/* ===== Image Modal ===== */
.cert-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.cert-modal.active {
    display: flex;
}

.cert-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    animation: fadeIn 0.3s ease;
}

.cert-modal-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
    z-index: 1;
    animation: modalSlideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cert-modal-content img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: 12px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
}

.cert-modal-close {
    position: absolute;
    top: -12px;
    right: -12px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    z-index: 2;
}

.cert-modal-close:hover {
    background: var(--bg-secondary);
    transform: rotate(90deg);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalSlideUp {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .cert-cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
    
    .domain-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .domain-count {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .certs-hero {
        padding: 110px 0 40px;
    }
    
    .cert-cards-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-stats-row {
        padding: 1rem 1.25rem;
        gap: 1.25rem;
    }
    
    .cert-stat-number {
        font-size: 1.35rem;
    }
    
    .certs-filter-bar {
        gap: 0.3rem;
    }
    
    .filter-btn {
        padding: 0.42rem 0.8rem;
        font-size: 0.75rem;
    }
    
    .filter-btn svg {
        display: none;
    }
}

@media (max-width: 480px) {
    .cert-stats-row {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .cert-stat-divider {
        display: none;
    }
}