/* ============================================================
   TRANSFORMER BOARDS — Catalog Page
   tb- prefix throughout
   ============================================================ */

/* ============================================================
   CERT LIGHTBOX — mirrors About Us exactly
   ============================================================ */
.ab2-lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(8,15,28,0.88);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    align-items: center;
    justify-content: center;
    padding: 2rem;
}
.ab2-lightbox.open { display: flex; }
.ab2-lb-box {
    position: relative;
    background: #fff;
    padding: 3rem 2.5rem 2.5rem;
    max-width: 400px;
    width: 100%;
    text-align: center;
    box-shadow: 0 40px 80px rgba(0,0,0,0.4);
    animation: ab2LbIn 0.22s ease;
}
@keyframes ab2LbIn {
    from { opacity: 0; transform: scale(0.9); }
    to   { opacity: 1; transform: scale(1); }
}
.ab2-lb-img { width: 180px; height: 180px; object-fit: contain; display: block; margin: 0 auto 1.5rem; }
.ab2-lb-title { font-size: 0.82rem; font-weight: 700; color: #0b1f3a; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
.ab2-lb-desc { font-size: 0.8rem; color: rgba(11,31,58,0.55); line-height: 1.6; }
.ab2-lb-close {
    position: absolute;
    top: 0.85rem; right: 0.85rem;
    width: 30px; height: 30px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(11,31,58,0.08);
    border: none; cursor: pointer; color: #0b1f3a;
    border-radius: 50%;
    transition: background 0.2s;
}
.ab2-lb-close:hover { background: rgba(11,31,58,0.15); }

/* ============================================================
   APPLICATIONS STRIP
   ============================================================ */
.tb-apps {
    padding: 2.5rem 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
}

.tb-apps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
}

.tb-app-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.1rem 1.25rem;
    background: #fff;
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
}

.tb-app-icon {
    width: 40px;
    height: 40px;
    background: var(--navy);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tb-app-icon svg {
    width: 18px;
    height: 18px;
    color: var(--gold);
}

.tb-app-name {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--navy);
    line-height: 1.3;
}

.tb-app-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

@media (max-width: 900px) {
    .tb-apps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .tb-apps-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   GRADE COMPARISON MATRIX
   ============================================================ */
.tb-matrix {
    padding: 3rem 0;
    border-bottom: 1px solid var(--border-subtle);
}

.tb-matrix-scroll {
    overflow-x: auto;
    margin-bottom: 0.75rem;
}

.tb-matrix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.tb-matrix-table thead tr {
    background: var(--navy);
}

.tb-matrix-table thead th {
    padding: 0.75rem 1.25rem;
    text-align: left;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.85);
    white-space: nowrap;
}

.tb-matrix-table thead th:first-child { border-radius: 8px 0 0 8px; }
.tb-matrix-table thead th:last-child  { border-radius: 0 8px 8px 0; }

.tb-matrix-row {
    border-bottom: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: background 0.15s;
}

.tb-matrix-row:hover { background: rgba(11,31,58,0.025); }

.tb-matrix-row.is-active {
    background: rgba(200,168,75,0.07);
    border-left: 3px solid var(--gold);
}

.tb-matrix-row td {
    padding: 0.85rem 1.25rem;
    color: var(--text-secondary);
    vertical-align: middle;
}

.tb-matrix-row td:first-child {
    font-weight: 700;
    color: var(--navy);
}

.tb-matrix-grade-chip {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    background: var(--navy);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    border-radius: 3px;
}

.tb-matrix-row.is-active .tb-matrix-grade-chip {
    background: var(--gold);
    color: var(--navy);
}

.tb-matrix-hint {
    font-size: 0.75rem;
    color: var(--text-faint);
    text-align: right;
}

/* ============================================================
   PANEL INTRO
   ============================================================ */
.tb-panel-intro {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.65;
    font-weight: 300;
    margin-bottom: 1.75rem;
    max-width: 560px;
}

/* ============================================================
   ACTIVE GRADE DISPLAY
   ============================================================ */
.tb-active-grade-display {
    background: rgba(11,31,58,0.04);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--gold);
    border-radius: 0 6px 6px 0;
    padding: 0.75rem 1rem;
    margin-bottom: 1.5rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.tb-active-grade-display strong {
    color: var(--navy);
    font-weight: 700;
}

/* ============================================================
   TAB NAV
   ============================================================ */
.tb-tabs {
    position: sticky;
    top: calc(var(--utility-h) + var(--header-h-scrolled));
    z-index: 90;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 2px 12px rgba(11, 31, 58, 0.06);
}

.tb-tabs .p-container {
    padding-top: 0;
    padding-bottom: 0;
}

.tb-tab-nav {
    display: flex;
    gap: 0;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    justify-content: center;
}

.tb-tab-nav::-webkit-scrollbar {
    display: none;
}

.tb-tab-pill {
    flex-shrink: 0;
    padding: 1.1rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.2s ease;
    white-space: nowrap;
}

.tb-tab-pill:hover {
    color: var(--navy);
}

.tb-tab-pill.is-active {
    color: var(--navy);
    border-bottom-color: var(--gold);
}

/* ============================================================
   PANELS
   ============================================================ */
.tb-panels {
    padding-top: 3.5rem;
    padding-bottom: 5rem;
}

.tb-panel {
    display: none;
}

.tb-panel.is-active {
    display: block;
    animation: tbPanelIn 0.35s var(--ease-out-quart) both;
}

@keyframes tbPanelIn {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Two-col layout ── */
.tb-panel-layout {
    display: grid;
    grid-template-columns: 480px 1fr;
    gap: 3.5rem;
    align-items: start;
    margin-bottom: 3.5rem;
}

@media (max-width: 900px) {
    .tb-panel-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ── Image ── */
.tb-panel-image {
    border-radius: 16px;
    overflow: hidden;
    background: var(--bg-secondary);
    aspect-ratio: 5 / 4;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tb-panel-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 1rem;
}

/* ── Info column ── */
.tb-panel-info {
    padding-top: 0.5rem;
}

.tb-panel-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.tb-grade-chip {
    display: inline-block;
    padding: 0.35rem 0.9rem;
    background: var(--navy);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    border-radius: 4px;
}

.tb-iec-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.9rem;
    background: rgba(200, 168, 75, 0.08);
    border: 1px solid rgba(200, 168, 75, 0.3);
    color: var(--gold-dark);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    border-radius: 4px;
}

.tb-iec-badge svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
}

.tb-panel-title {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 700;
    color: var(--navy);
    letter-spacing: -0.025em;
    line-height: 1.2;
    margin-bottom: 2rem;
}

/* ── Key Properties ── */
.tb-props-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 1rem;
}

.tb-props-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.tb-prop {
    display: flex;
    align-items: baseline;
    gap: 0.85rem;
}

.tb-prop-num {
    flex-shrink: 0;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.05em;
    padding-top: 0.05em;
}

.tb-prop-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================================
   DIMENSIONS TABLE
   ============================================================ */
.tb-table-wrap {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 2rem 2.5rem;
    margin-bottom: 2rem;
}

.tb-table-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 1.25rem;
}

.tb-table-scroll {
    overflow-x: auto;
}

.tb-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.tb-table thead tr {
    background: var(--navy);
}

.tb-table thead th {
    padding: 0.75rem 1.25rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.9);
    white-space: nowrap;
}

.tb-table thead th:first-child {
    border-radius: 8px 0 0 8px;
}

.tb-table thead th:last-child {
    border-radius: 0 8px 8px 0;
}

.tb-table tbody tr {
    border-bottom: 1px solid var(--border-subtle);
}

.tb-table tbody tr:last-child {
    border-bottom: none;
}

.tb-table tbody tr:hover td {
    background: rgba(11, 31, 58, 0.02);
}

.tb-table tbody td {
    padding: 0.85rem 1.25rem;
    color: var(--text-secondary);
    vertical-align: middle;
    transition: background 0.15s;
}

/* First column = row label (slightly bolder); columns 2–4 share one consistent
   style so font colour, weight, and size match across the table. */
.tb-table tbody td:first-child {
    font-weight: 600;
    color: var(--navy);
}

.tb-table tbody td:nth-child(2),
.tb-table tbody td:nth-child(3),
.tb-table tbody td:nth-child(4) {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--navy);
}

/* ============================================================
   CERT STRIP — mirrors About Us page exactly (ab2-cert-* classes)
   ============================================================ */
.ab2-cert-strip {
    background: #fff;
    border-top: 1px solid rgba(11,31,58,0.08);
    border-bottom: 1px solid rgba(11,31,58,0.06);
    box-shadow: 0 4px 24px rgba(11,31,58,0.05);
}
.ab2-cert-inner {
    width: 100%;
    padding: 1rem clamp(3rem, 7vw, 7rem);
    display: flex;
    align-items: stretch;
    gap: 0;
}
.ab2-cert-label {
    flex-shrink: 0;
    border-right: 1px solid rgba(11,31,58,0.12);
    padding: 0.5rem clamp(1rem, 2vw, 2rem) 0.5rem 0;
    font-size: 0.62rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: rgba(11,31,58,0.6);
    line-height: 1.75;
    white-space: nowrap;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-right: 2rem;
}
.ab2-cert-label em {
    color: #D4A843;
    font-style: normal;
    display: block;
}
.ab2-cert-items {
    display: flex;
    align-items: stretch;
    flex: 1;
}
.ab2-cert-item {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0.85rem;
    padding: 1rem 0.75rem;
    flex: 1;
    border-right: 1px solid rgba(11,31,58,0.07);
    cursor: pointer;
    transition: background 0.2s;
}
.ab2-cert-item:last-child { border-right: none; }
.ab2-cert-item:hover { background: rgba(11,31,58,0.03); }
.ab2-cert-item img {
    width: 88px;
    height: 88px;
    object-fit: contain;
    opacity: 0.85;
    flex-shrink: 0;
    display: block;
    transition: opacity 0.2s, transform 0.2s;
}
.ab2-cert-item:hover img { opacity: 1; transform: scale(1.06); }
.ab2-cert-item-text {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    text-align: left;
}
.ab2-cert-item-name {
    font-size: 0.65rem;
    font-weight: 700;
    color: #0b1f3a;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    line-height: 1.3;
}
.ab2-cert-item-sub {
    font-size: 0.58rem;
    color: rgba(11,31,58,0.42);
    line-height: 1.4;
}
@media (max-width: 900px) {
    .ab2-cert-inner { flex-direction: column; align-items: flex-start; padding: 1rem clamp(1.5rem, 5vw, 3rem); }
    .ab2-cert-label { border-right: none; border-bottom: 1px solid rgba(11,31,58,0.08); padding: 0 0 0.75rem 0; width: 100%; }
    .ab2-cert-items { flex-wrap: wrap; width: 100%; }
    .ab2-cert-item { flex: 1 1 45%; border-right: none; border-bottom: 1px solid rgba(11,31,58,0.07); justify-content: flex-start; padding: 0.85rem 0.5rem; }
    .ab2-cert-item img { width: 64px; height: 64px; }
}
@media (max-width: 480px) {
    .ab2-cert-item { flex: 1 1 100%; }
    .ab2-cert-item img { width: 56px; height: 56px; }
}

/* ============================================================
   ENQUIRY SECTION
   ============================================================ */
.tb-enquiry {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding: clamp(3rem, 6vw, 5rem) 0;
}

.tb-enquiry-inner {
    max-width: 700px;
    margin: 0 auto;
}

.tb-enquiry-eyebrow {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gold-dark);
    margin-bottom: 0.75rem;
}

.tb-enquiry-title {
    font-size: clamp(1.6rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--navy);
    letter-spacing: -0.025em;
    margin-bottom: 0.75rem;
}

.tb-enquiry-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.65;
    font-weight: 300;
    margin-bottom: 2.5rem;
}

.tb-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.tb-form-grid .tb-form-full {
    grid-column: 1 / -1;
}

.tb-form-input,
.tb-form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: var(--font-body);
    font-size: 0.92rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border-accent);
    border-radius: 8px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
}

.tb-form-input:focus,
.tb-form-textarea:focus {
    border-color: var(--navy);
    box-shadow: 0 0 0 3px rgba(11, 31, 58, 0.08);
}

.tb-form-input::placeholder,
.tb-form-textarea::placeholder {
    color: var(--text-faint);
}

.tb-form-textarea {
    min-height: 130px;
    resize: vertical;
}

@media (max-width: 600px) {
    .tb-form-grid {
        grid-template-columns: 1fr;
    }
    .tb-panel-layout {
        grid-template-columns: 1fr;
    }
    .tb-table-wrap {
        padding: 1.25rem 1rem;
    }
}