.bc-tool {
    box-sizing: border-box;
    margin: 20px 0;
    padding: 20px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    background: #fff;
    color: #111827;
    font-size: 15px;
    line-height: 1.7;
}

.bc-tool *,
.bc-tool *::before,
.bc-tool *::after {
    box-sizing: border-box;
}

.bc-tool h3 {
    margin: 0 0 16px;
    font-size: 20px;
    line-height: 1.3;
}

.bc-tool label {
    display: block;
    margin: 0 0 12px;
    font-weight: 600;
}

.bc-tool input,
.bc-tool select,
.bc-tool textarea {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    background: #fff;
    color: #111827;
    font: inherit;
}

.bc-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 38px;
    padding: 8px 14px;
    border: 0;
    border-radius: 6px;
    background: #111827;
    color: #fff !important;
    font-weight: 700;
    text-decoration: none !important;
    cursor: pointer;
}

.bc-button:hover {
    background: #000;
}

.bc-result,
.bc-notice {
    margin-top: 14px;
    padding: 12px;
    border-radius: 6px;
    background: #f3f4f6;
}

.bc-muted {
    color: #6b7280;
}

.bc-code {
    display: inline-block;
    margin-left: 8px;
    padding: 4px 8px;
    border-radius: 999px;
    background: #f3f4f6;
    font-size: 13px;
}

.bc-exchange-table {
    overflow-x: auto;
}

.bc-exchange-table table {
    width: 100%;
    min-width: 760px;
    border-collapse: collapse;
}

.bc-exchange-table th,
.bc-exchange-table td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
    vertical-align: top;
}

.bc-price-widget {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px;
}

.bc-price-symbol {
    color: #6b7280;
    font-weight: 700;
}

.bc-price-value {
    font-size: 28px;
}

.bc-price-change {
    color: #059669;
    font-weight: 700;
}

@media (max-width: 640px) {
    .bc-tool {
        padding: 16px;
    }
}