/* =====================================================================
   Certificates & Compliance — quiet authoritative cards
   Light detail panel (enterprise) · steel-blue accent only
===================================================================== */

.certificates-section {
    padding: clamp(64px, 8vw, 96px) 20px clamp(48px, 6vw, 72px);
    background: var(--b2b-bg, #f7f8fa);
    border-top: 1px solid var(--b2b-border, #e2e5e9);
    overflow: visible;
}

.certificates-section__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 4px;
}

.certificates-section__header {
    text-align: center;
    margin-bottom: clamp(24px, 3.5vw, 36px);
}

.certificates-section__eyebrow {
    margin: 0 0 6px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--b2b-text-muted, #6b7280);
}

.certificates-section__title {
    margin: 0 0 8px;
    font-size: clamp(1.2rem, 2.2vw, 1.5rem);
    font-weight: 650;
    color: var(--b2b-text, #1a1d21);
    letter-spacing: -0.015em;
    line-height: 1.25;
}

.certificates-section__lead {
    margin: 0 auto;
    max-width: 420px;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--b2b-text-muted, #6b7280);
}

.certificates-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(12px, 2vw, 18px);
    align-items: stretch;
}

.certificate-card {
    position: relative;
    display: flex;
    min-width: 0;
}

.certificate-card__trigger {
    appearance: none;
    width: 100%;
    margin: 0;
    padding: 18px 14px 16px;
    background: var(--b2b-surface, #fff);
    border: 1px solid var(--b2b-border, #e2e5e9);
    border-radius: var(--b2b-radius, 6px);
    box-shadow: none;
    font: inherit;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
    transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.certificate-card__trigger:hover {
    border-color: var(--b2b-primary, #3e6b85);
    box-shadow: none;
    outline: none;
}

.certificate-card__trigger:focus-visible {
    border-color: var(--b2b-primary, #3e6b85);
    box-shadow: 0 0 0 2px var(--b2b-primary-soft, #e4eef2);
    outline: none;
}

/* Open: white card + steel-blue border (no fill) */
.certificate-card.is-open .certificate-card__trigger {
    background: var(--b2b-surface, #fff);
    border-color: var(--b2b-primary, #3e6b85);
    box-shadow: inset 0 -2px 0 0 var(--b2b-primary, #3e6b85);
}

.certificate-card.is-open .certificate-card__name {
    color: var(--b2b-text, #1a1d21);
}

.certificate-card.is-open .certificate-card__year {
    color: var(--b2b-text-muted, #6b7280);
}

.certificate-card__media {
    width: 100%;
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--b2b-neutral-soft, #f1f3f5);
    border-radius: calc(var(--b2b-radius, 6px) - 1px);
    overflow: hidden;
}

.certificate-card__logo {
    max-width: 72%;
    max-height: 72%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.78;
    transition: opacity 0.18s ease, filter 0.18s ease;
}

.certificate-card__trigger:hover .certificate-card__logo,
.certificate-card__trigger:focus-visible .certificate-card__logo,
.certificate-card.is-open .certificate-card__logo {
    filter: grayscale(90%);
    opacity: 1;
}

.certificate-card__name {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--b2b-text, #1a1d21);
    line-height: 1.35;
    word-break: break-word;
}

.certificate-card__issuer {
    /* Card face emphasizes name + year; issuer stays in detail panel. */
    display: none;
}

.certificate-card__year {
    display: inline-block;
    margin-top: 0;
    padding: 0;
    font-size: 12px;
    font-weight: 500;
    color: var(--b2b-text-muted, #6b7280);
    background: transparent;
    border-radius: 0;
}

/* ===== Light detail panel (positioned by JS; keep .certificate-tooltip hooks) ===== */
.certificate-tooltip {
    position: fixed;
    z-index: 9500;
    box-sizing: border-box;
    min-width: 220px;
    max-width: 280px;
    padding: 14px 16px 14px 15px;
    background: var(--b2b-surface, #ffffff);
    color: var(--b2b-text, #1a1d21);
    border: 1px solid var(--b2b-border, #e2e5e9);
    /* Restrained steel-blue accent — top edge only */
    border-top: 2px solid var(--b2b-primary, #3e6b85);
    border-radius: var(--b2b-radius, 6px);
    box-shadow: 0 4px 20px rgba(26, 29, 33, 0.08), 0 1px 2px rgba(26, 29, 33, 0.04);
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    /* Opacity-only show — avoids measure/paint jitter from translate */
    transition: opacity 0.14s ease, visibility 0.14s ease;
}

.certificate-tooltip.is-visible {
    opacity: 1;
    visibility: visible;
}

.certificate-tooltip__name {
    margin: 0 0 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--b2b-text, #1a1d21);
    line-height: 1.3;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.certificate-tooltip__meta {
    margin: 0 0 5px;
    font-size: 12px;
    line-height: 1.5;
    color: var(--b2b-text, #1a1d21);
    overflow-wrap: anywhere;
    word-break: break-word;
}

.certificate-tooltip__meta:last-child {
    margin-bottom: 0;
}

.certificate-tooltip__label {
    display: inline-block;
    min-width: 56px;
    margin-right: 8px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--b2b-text-muted, #6b7280);
}

@media (max-width: 1024px) {
    .certificates-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .certificates-section {
        padding: 48px 16px 40px;
    }

    .certificates-section__header {
        margin-bottom: 24px;
    }

    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .certificate-card__trigger {
        flex-direction: row;
        align-items: center;
        gap: 14px;
        text-align: left;
        padding: 12px 14px;
    }

    .certificate-card.is-open .certificate-card__trigger {
        /* Mobile: left underline reads better as bottom accent still */
        box-shadow: inset 2px 0 0 0 var(--b2b-primary, #3e6b85);
    }

    .certificate-card__media {
        flex-shrink: 0;
        width: 72px;
        height: 56px;
        aspect-ratio: auto;
    }

    .certificate-card__name,
    .certificate-card__issuer {
        text-align: left;
    }
}

@media (prefers-reduced-motion: reduce) {
    .certificate-card__trigger,
    .certificate-card__logo,
    .certificate-tooltip {
        transition: none;
    }
}