.rombs-wood-calculator {
    --rwc-bg: #FAF8F5;
    --rwc-border: #E5DED6;
    --rwc-text: #2C2220;
    --rwc-primary: #CC0000;
    --rwc-muted: #6c6661;
    background: var(--rwc-bg);
    border: 1px solid var(--rwc-border);
    border-radius: 8px;
    padding: 24px;
    color: var(--rwc-text);
    max-width: 900px;
    margin: 0 auto;
}
.rombs-wood-calculator h2,
.rombs-wood-calculator h3 { margin-top: 0; color: var(--rwc-text); }

.rombs-wood-calculator__tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--rwc-border);
    margin-bottom: 20px;
}
.rombs-wood-calculator__tab {
    padding: 10px 20px;
    background: transparent;
    border: 0;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    font-size: 16px;
    font-weight: 600;
    color: var(--rwc-muted);
    cursor: pointer;
}
.rombs-wood-calculator__tab.active {
    color: var(--rwc-primary);
    border-bottom-color: var(--rwc-primary);
}
.rombs-wood-calculator__tab:hover { color: var(--rwc-text); }

.rombs-wood-calculator__panel {
    display: grid;
    gap: 16px;
    grid-template-columns: 1fr 1fr;
}
.rombs-wood-calculator__panel[hidden] { display: none; }

@media (max-width: 575.98px) {
    .rombs-wood-calculator__panel { grid-template-columns: 1fr; }
}

.rombs-wood-calculator__field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.rombs-wood-calculator__field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--rwc-muted);
}
.rombs-wood-calculator__field input,
.rombs-wood-calculator__field select {
    padding: 10px 12px;
    border: 1px solid var(--rwc-border);
    border-radius: 4px;
    font-size: 15px;
    background: #fff;
    color: var(--rwc-text);
    font-family: inherit;
    width: 100%;
    box-sizing: border-box;
}
.rombs-wood-calculator__field input:focus,
.rombs-wood-calculator__field select:focus {
    outline: none;
    border-color: var(--rwc-primary);
}
.rombs-wood-calculator__field--full { grid-column: 1 / -1; }
.rombs-wood-calculator__field__hint {
    font-size: 12px;
    color: var(--rwc-muted);
}

.rombs-wood-calculator__result {
    margin-top: 24px;
    padding: 20px;
    background: #fff;
    border: 1px solid var(--rwc-border);
    border-radius: 6px;
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 575.98px) {
    .rombs-wood-calculator__result { grid-template-columns: 1fr; }
}
.rombs-wood-calculator__result-block { text-align: center; }
.rombs-wood-calculator__result-block .label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--rwc-muted);
}
.rombs-wood-calculator__result-block .value {
    font-size: 28px;
    font-weight: 700;
    color: var(--rwc-text);
    margin-top: 4px;
}
.rombs-wood-calculator__result-block--primary .value { color: var(--rwc-primary); }

.rombs-wood-calculator__hint {
    margin-top: 16px;
    font-size: 12px;
    color: var(--rwc-muted);
    line-height: 1.5;
}