/* Сценарий «Рассчитать деталь» — /product */

.product-home {
    --ph-accent: var(--bp-accent, #358dff);
    padding-bottom: 48px;
}

.product-home__topbar {
    padding: 16px 0;
    border-bottom: 1px solid var(--bp-frame, rgba(130, 175, 220, 0.26));
    margin-bottom: 8px;
}

.product-home__topbar-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.product-home__topbar-title {
    font-weight: 700;
    font-size: 16px;
    color: var(--bp-ink);
}

.product-home__topbar-steps {
    margin-left: auto;
    font-family: var(--font-mono, monospace);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--bp-ink-dim);
}

.product-home__picker {
    padding: 40px 0 48px;
}

.product-home__picker--dim {
    background: rgba(0, 0, 0, 0.12);
    border-top: 1px solid var(--bp-frame);
    border-bottom: 1px solid var(--bp-frame);
}

.product-home__section-head {
    margin-bottom: 28px;
    max-width: 640px;
}

.product-home__section-head--center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.product-home__step-label {
    display: inline-block;
    font-family: var(--font-mono, monospace);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ph-accent);
    margin-bottom: 8px;
}

.product-home__section-title {
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 700;
    color: var(--bp-ink);
    margin-bottom: 8px;
}

.product-home__section-desc {
    font-size: 15px;
    color: var(--bp-ink-muted);
    line-height: 1.55;
}

.product-home__grid {
    display: grid;
    gap: 16px;
}

.product-home__grid--4 {
    grid-template-columns: repeat(4, 1fr);
}

.product-home__grid--2 {
    grid-template-columns: repeat(2, 1fr);
}

.product-home__card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 10px;
    padding: 20px;
    background: var(--bp-paper-panel);
    border: 1px solid var(--bp-frame);
    border-radius: var(--radius-tech, 3px);
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
    color: inherit;
    font: inherit;
    width: 100%;
}

.product-home__card:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.product-home__card:not(:disabled):hover {
    border-color: var(--bp-line-bright);
    box-shadow: var(--bp-lift);
    transform: translateY(-2px);
}

.product-home__card--on {
    border-color: var(--ph-accent);
    box-shadow: 0 0 0 1px var(--ph-accent), var(--bp-lift);
    background: var(--bp-paper-elevated, rgba(40, 76, 118, 0.9));
}

.product-home__card-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(53, 141, 255, 0.12);
    border: 1px solid var(--bp-frame);
    border-radius: var(--radius-tech, 3px);
    color: var(--ph-accent);
    font-size: 16px;
}

.product-home__card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--bp-ink);
}

.product-home__card-text {
    font-size: 13px;
    line-height: 1.5;
    color: var(--bp-ink-muted);
}

.product-home__card-files {
    margin-top: auto;
    font-family: var(--font-mono, monospace);
    font-size: 11px;
    color: var(--ph-accent);
    letter-spacing: 0.02em;
}

.product-home__cta-bar {
    margin-top: 32px;
    padding: 24px;
    border: 1px solid var(--bp-frame);
    border-radius: var(--radius-tech, 3px);
    background: var(--bp-glass);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
}

.product-home__cta-summary {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 15px;
    color: var(--bp-ink);
}

.product-home__cta-summary i {
    color: var(--bp-ink-dim);
    font-size: 12px;
}

.product-home__cta-note {
    font-size: 12px;
    color: var(--bp-ink-dim);
    max-width: 480px;
    line-height: 1.5;
}

@media (max-width: 1024px) {
    .product-home__grid--4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .product-home__grid--4,
    .product-home__grid--2 {
        grid-template-columns: 1fr;
    }

    .product-home__topbar-steps {
        width: 100%;
        margin-left: 0;
    }
}