.fd-tool-panel {
    margin: 25px auto 0;
    max-width: 640px;
    background: var(--fd-card-bg);
    border-radius: 2px;
    padding: 10px 16px;
    color: var(--fd-text);
    box-shadow: 0 2px 8px var(--fd-card-shadow);
}

.fd-tool-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-end;
    margin-bottom: 18px;
}
.fd-tool-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 150px;
}
.fd-tool-label {
    margin-top: 10px;
    font-size: .82rem;
    font-weight: 600;
    color: var(--fd-text-muted);
}
.fd-tool-unit {
    font-weight: 400;
    opacity: .8;
}
.fd-tool-input {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--fd-border);
    border-radius: 8px;
    font-size: .95rem;
    background: var(--fd-card-bg);
    color: var(--fd-text);
    box-sizing: border-box;
}
.fd-tool-input:focus {
    outline: none;
    border-color: var(--fd-primary);
    box-shadow: 0 0 0 2px rgba(29,147,198,.18);
}
select.fd-tool-input {
    width: auto;
    min-width: 170px;
    max-width: 100%;
}
.fd-tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.fd-tool-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0 !important;
    padding: 9px 14px !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: none !important;
    color: var(--fd-text-muted) !important;
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background .15s, color .15s;
}
.fd-tool-btn:hover,
.fd-tool-btn:focus,
.fd-tool-btn:active {
    background: none !important;
    box-shadow: none !important;
}

.fd-tool-seg {
    display: inline-flex;
    border: 1px solid var(--fd-border);
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
}
.fd-tool-seg-btn.active,
.fd-tool-seg-btn.active:hover,
.fd-tool-seg-btn.active:focus {
    background: #0a9ddc !important;
    color: #fff !important;
}
.fd-tool-seg-btn.active[data-mode="abs"],
.fd-tool-seg-btn.active[data-mode="abs"]:hover,
.fd-tool-seg-btn.active[data-mode="abs"]:focus {
    background: #d64545 !important;
}

.fd-tool-convert {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}
.fd-tool-convert .fd-tool-field { min-width: 130px; }
.fd-tool-swap {
    align-self: flex-end;
    margin-bottom: 3px;
    font-size: 1.4rem;
    line-height: 1;
    color: var(--fd-text-muted);
    cursor: pointer;
    user-select: none;
    padding: 6px 9px;
    border-radius: 8px;
    transition: color .15s, background .15s;
}
.fd-tool-swap:hover { color: var(--fd-primary); background: rgba(29,147,198,.12); }
.fd-tool-swap.active { color: var(--fd-primary); background: rgba(29,147,198,.16); }

.fd-tool-range-wrap {margin: 30px 0 40px;}
.fd-tool-range {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 24px;
    background: transparent;
    cursor: pointer;
}
.fd-tool-range::-webkit-slider-runnable-track {
    height: 3px;
    border-radius: 2px;
    background: var(--fd-border);
}
.fd-tool-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 4px;
    height: 22px;
    margin-top: -9px;
    border-radius: 2px;
    background: var(--fd-primary);
    box-shadow: 0 0 0 1px rgba(0,0,0,.2);
}
.fd-tool-range::-moz-range-track {
    height: 3px;
    border-radius: 2px;
    background: var(--fd-border);
}
.fd-tool-range::-moz-range-thumb {
    width: 4px;
    height: 22px;
    border: 0;
    border-radius: 2px;
    background: var(--fd-primary);
}
.fd-tool-scale {
    display: flex;
    justify-content: space-between;
    font-size: .72rem;
    color: var(--fd-text-muted);
    margin-top: 2px;
}

.fd-tool-section-title {
    margin: 6px 0 12px;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--fd-primary);
}

.fd-tool-sub {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.fd-tool-sub-title {
    margin-top: 30px;
    font-weight: 700;
    color: var(--fd-primary);
    font-size: .9rem;
}

.fd-tool-result {
    margin-top: 6px;
    padding: 12px 16px;
    border-radius: 10px;
    background: var(--fd-body-bg);
    border-left: 4px solid var(--fd-primary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.fd-tool-result-label {
    font-size: .74rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--fd-text-muted);
}
.fd-tool-result-value {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--fd-primary);
    line-height: 1.1;
}
.fd-tool-result-sub {
    font-size: .8rem;
    color: var(--fd-text-muted);
}
.fd-tool-result-cool { border-left-color: #1d93c6; }
.fd-tool-result-cool .fd-tool-result-value { color: #1d93c6; }
.fd-tool-result-warm { border-left-color: #e67e22; }
.fd-tool-result-warm .fd-tool-result-value { color: #e67e22; }

.fd-tool-note {
    font-size: .82rem;
    color: var(--fd-text-muted);
    margin: 4px 0 0;
}
.fd-tool-disclaimer {
    font-size: .78rem;
    color: var(--fd-text-muted);
    font-style: italic;
    margin: 14px 0 0;
}

@media (max-width: 600px) {
    .fd-tool-panel { text-align: center; }
    .fd-tool-row { gap: 10px; margin-bottom: 12px; justify-content: center; }
    .fd-tool-convert {gap: 3px;justify-content: center;}
    .fd-tool-field,
    .fd-tool-convert .fd-tool-field {
        flex: 1 1 100%;
        margin: 5px 0px;
        min-width: 0;
        align-items: center;
    }
    .fd-tool-input,
    select.fd-tool-input {
        width: 30%;
        min-width: 100px;
        text-align: center;
        padding: 7px 9px;
        font-size: 20px;
    }
    .fd-tool-seg { width: auto; }
    .fd-tool-seg-btn { padding: 7px 12px; font-size: .8rem; }
    .fd-tool-swap { align-self: center; margin: 0; }
    .fd-tool-sub { align-items: center; }
    .fd-tool-result {margin-bottom: 15px;align-items: center;text-align: center;}
    .fd-tool-result-value { font-size: 1.45rem; }
    .fd-tool-grid { gap: 14px; }
}