.kbz-mwc {
    --kbz-mwc-accent: #be2d0d;
    --kbz-mwc-accent-rgb: 190, 45, 13;
    --kbz-mwc-accent-dark: #9a240a;
    --kbz-mwc-border: #d1d5db;
    --kbz-mwc-bg: #fff;
    --kbz-mwc-muted: #f9fafb;
    --kbz-mwc-surface: #f3f4f6;
    --kbz-mwc-text: #111827;
    --kbz-mwc-label: #374151;
    --kbz-mwc-hint: #6b7280;
    --kbz-mwc-radius: 10px;
    --kbz-mwc-radius-sm: 6px;
    --kbz-mwc-gap: 1.25rem;
    --kbz-mwc-font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

    display: grid;
    grid-template-columns: minmax(168px, 220px) minmax(0, 1fr);
    gap: var(--kbz-mwc-gap);
    max-width: 960px;
    margin: 1rem auto;
    padding: 1.25rem;
    background: var(--kbz-mwc-bg);
    border: 1px solid var(--kbz-mwc-border);
    border-radius: var(--kbz-mwc-radius);
    font-family: var(--kbz-mwc-font);
    color: var(--kbz-mwc-text);
    line-height: 1.45;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.kbz-mwc *,
.kbz-mwc *::before,
.kbz-mwc *::after {
    box-sizing: border-box;
}

.kbz-mwc-mount:not([data-kbz-mounted]) {
    min-height: 16rem;
}

@media (max-width: 768px) {
    .kbz-mwc {
        grid-template-columns: 1fr;
        padding: 1rem;
        gap: 1rem;
    }
}

.kbz-mwc__sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* —— Sidebar: section picker —— */

.kbz-mwc__sidebar {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    min-width: 0;
}

.kbz-mwc__step-title {
    margin: 0;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--kbz-mwc-hint);
}

.kbz-mwc__figures {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    border: 0;
}

.kbz-mwc__figure-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    min-height: 4.75rem;
    padding: 0.5rem 0.35rem;
    border: 1px solid var(--kbz-mwc-border);
    border-radius: var(--kbz-mwc-radius-sm);
    background: var(--kbz-mwc-bg);
    color: var(--kbz-mwc-label);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition:
        background 0.15s ease,
        border-color 0.15s ease,
        box-shadow 0.15s ease,
        color 0.15s ease;
}

.kbz-mwc__figure-btn:hover:not(.is-active) {
    border-color: var(--kbz-mwc-accent);
    background: #fde8e2;
    color: var(--kbz-mwc-text);
}

.kbz-mwc__figure-btn:focus-visible {
    outline: none;
    border-color: var(--kbz-mwc-accent);
    box-shadow: 0 0 0 3px rgba(var(--kbz-mwc-accent-rgb), 0.25);
}

.kbz-mwc__figure-btn.is-active {
    background: var(--kbz-mwc-accent);
    border-color: var(--kbz-mwc-accent-dark);
    color: #fff;
    box-shadow: 0 2px 6px rgba(var(--kbz-mwc-accent-rgb), 0.28);
}

.kbz-mwc__figure-btn.is-active:hover {
    background: var(--kbz-mwc-accent-dark);
    border-color: #7a1d08;
    color: #fff;
}

.kbz-mwc__figure-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
}

.kbz-mwc__figure-btn img {
    max-width: 2rem;
    max-height: 2rem;
    object-fit: contain;
    pointer-events: none;
    -webkit-user-drag: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.kbz-mwc__figure-btn.is-active img {
    filter: brightness(0) invert(1);
}

.kbz-mwc__figure-label {
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1.25;
    text-align: center;
    hyphens: auto;
}

.kbz-mwc__diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 7rem;
    padding: 0.75rem;
    background: var(--kbz-mwc-muted);
    border: 1px solid var(--kbz-mwc-border);
    border-radius: var(--kbz-mwc-radius-sm);
}

.kbz-mwc__diagram[hidden] {
    display: none;
}

.kbz-mwc__diagram img {
    max-width: 100%;
    max-height: 9rem;
    height: auto;
    pointer-events: none;
    -webkit-user-drag: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

/* —— Main workspace —— */

.kbz-mwc__main {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-width: 0;
}

.kbz-mwc__section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.kbz-mwc__section-title {
    margin: 0;
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--kbz-mwc-hint);
}

.kbz-mwc__hint {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin: 0.75rem 0 0;
    padding: 0.65rem 0.85rem;
    font-size: 0.875rem;
    color: var(--kbz-mwc-label);
    background: var(--kbz-mwc-surface);
    border-left: 3px solid var(--kbz-mwc-accent);
    border-radius: 0 var(--kbz-mwc-radius-sm) var(--kbz-mwc-radius-sm) 0;
}

.kbz-mwc__hint[hidden] {
    display: none;
}

.kbz-mwc__hint::before {
    content: "";
    flex-shrink: 0;
    width: 1.125rem;
    height: 1.125rem;
    margin-top: 0.05rem;
    background-color: var(--kbz-mwc-accent);
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill='%23000' fill-rule='evenodd' d='M18 10a8 8 0 11-16 0 8 8 0 0116 0zM9 8a1 1 0 012 0v4a1 1 0 11-2 0V8zm1-3a1 1 0 100 2 1 1 0 000-2z' clip-rule='evenodd'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill='%23000' fill-rule='evenodd' d='M18 10a8 8 0 11-16 0 8 8 0 0116 0zM9 8a1 1 0 012 0v4a1 1 0 11-2 0V8zm1-3a1 1 0 100 2 1 1 0 000-2z' clip-rule='evenodd'/%3E%3C/svg%3E");
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: contain;
    mask-size: contain;
}

.kbz-mwc__material-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

@media (max-width: 520px) {
    .kbz-mwc__material-grid {
        grid-template-columns: 1fr;
    }

    .kbz-mwc__figures {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .kbz-mwc__figure-label {
        display: none;
    }

    .kbz-mwc__figure-btn {
        min-height: 3rem;
        padding: 0.35rem;
    }
}

.kbz-mwc__field {
    margin: 0;
}

.kbz-mwc__label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--kbz-mwc-label);
}

.kbz-mwc__select,
.kbz-mwc__input {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.55rem 0.75rem;
    font: inherit;
    font-size: 1rem;
    line-height: 1.25;
    color: var(--kbz-mwc-text);
    background: var(--kbz-mwc-bg);
    border: 1px solid var(--kbz-mwc-border);
    border-radius: var(--kbz-mwc-radius-sm);
    outline: none;
    box-shadow: 0 0 0 3px transparent;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    user-select: text;
    -webkit-user-select: text;
    -webkit-touch-callout: default;
}

.kbz-mwc__select {
    padding-right: 2rem;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7280' d='M1.41 0L6 4.58 10.59 0 12 1.41l-6 6-6-6z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 12px 8px;
}

.kbz-mwc__select--empty {
    color: #9ca3af;
}

.kbz-mwc__select:hover,
.kbz-mwc__input:hover {
    border-color: #9ca3af;
}

.kbz-mwc__select:focus,
.kbz-mwc__select:focus-visible,
.kbz-mwc__input:focus,
.kbz-mwc__input:focus-visible {
    outline: none;
    border-color: var(--kbz-mwc-accent);
    box-shadow: 0 0 0 3px rgba(var(--kbz-mwc-accent-rgb), 0.22);
}

.kbz-mwc__input-wrap {
    display: flex;
    align-items: stretch;
    min-width: 0;
}

.kbz-mwc__input-wrap .kbz-mwc__input {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: 0;
    min-width: 0;
}

.kbz-mwc__input-unit {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    padding: 0 0.65rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--kbz-mwc-hint);
    background: var(--kbz-mwc-surface);
    border: 1px solid var(--kbz-mwc-border);
    border-left: 0;
    border-radius: 0 var(--kbz-mwc-radius-sm) var(--kbz-mwc-radius-sm) 0;
}

.kbz-mwc__input-wrap:focus-within .kbz-mwc__input,
.kbz-mwc__input-wrap:focus-within .kbz-mwc__input-unit {
    border-color: var(--kbz-mwc-accent);
}

.kbz-mwc__input-wrap:focus-within {
    box-shadow: 0 0 0 3px rgba(var(--kbz-mwc-accent-rgb), 0.22);
    border-radius: var(--kbz-mwc-radius-sm);
}

.kbz-mwc__input-wrap:focus-within .kbz-mwc__input {
    box-shadow: none;
}

/* —— Calculation panel —— */

.kbz-mwc__panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.15rem;
    background: var(--kbz-mwc-muted);
    border: 1px solid var(--kbz-mwc-border);
    border-radius: var(--kbz-mwc-radius-sm);
}

.kbz-mwc__panel[hidden] {
    display: none;
}

.kbz-mwc__panel-head {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.kbz-mwc__panel-title {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--kbz-mwc-text);
}

.kbz-mwc__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.kbz-mwc__chip {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--kbz-mwc-label);
    background: var(--kbz-mwc-bg);
    border: 1px solid var(--kbz-mwc-border);
    border-radius: 999px;
}

.kbz-mwc__fields-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

@media (max-width: 520px) {
    .kbz-mwc__fields-grid {
        grid-template-columns: 1fr;
    }
}

.kbz-mwc__result {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: center;
    gap: 0.35rem 0.5rem;
    min-height: 3.25rem;
    padding: 0.85rem 1rem;
    background: linear-gradient(135deg, var(--kbz-mwc-accent), var(--kbz-mwc-accent-dark));
    color: #fff;
    border-radius: var(--kbz-mwc-radius-sm);
    transition: opacity 0.2s ease;
}

.kbz-mwc__result-label {
    font-size: 0.95rem;
    font-weight: 600;
    opacity: 0.92;
}

.kbz-mwc__result-value {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}

.kbz-mwc__result-unit {
    font-size: 0.95rem;
    font-weight: 600;
    opacity: 0.9;
}

.kbz-mwc__result--pending {
    opacity: 0.82;
}

.kbz-mwc__result--pending .kbz-mwc__result-value {
    font-size: 1.1rem;
    font-weight: 500;
    opacity: 0.75;
}

.kbz-mwc__result--updated {
    animation: kbz-mwc-pulse 0.35s ease;
}

@keyframes kbz-mwc-pulse {
    0% { transform: scale(1); }
    40% { transform: scale(1.015); }
    100% { transform: scale(1); }
}

/* Elementor editor */
.elementor-element .kbz-mwc {
    pointer-events: auto;
    position: relative;
    z-index: 2;
}