.physics-calculator-wrap { max-width: 100%; margin: 0 auto; padding: 4px; }
.physics-calculator-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}
.physics-calculator-col { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.physics-calculator-panel {
    background: var(--bg-card, #fff);
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius, 12px);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.physics-calculator-head { display: flex; flex-direction: column; gap: 2px; }
.physics-calculator-headt { font-size: 15px; font-weight: 600; color: var(--text, #1f2328); }
.physics-calculator-heads { font-size: 12px; color: var(--text-secondary, #6b7280); }
.physics-calculator-sub {
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius-sm, 8px);
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: var(--bg-input, #fff);
}
.physics-calculator-subt { font-size: 13px; font-weight: 600; color: var(--text, #1f2328); }
.physics-calculator-row { display: flex; flex-wrap: wrap; gap: 8px; }
.physics-calculator-col { flex: 1 1 90px; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.physics-calculator-col-wide { flex: 2 1 180px; }
.physics-calculator-lbl { font-size: 12px; color: var(--text-secondary, #6b7280); }
.physics-calculator-input,
.physics-calculator-select {
    width: 100%;
    min-width: 0;
    padding: 7px 9px;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius-sm, 8px);
    background: var(--bg-input, #fff);
    color: var(--text, #1f2328);
    font-size: 14px;
    box-sizing: border-box;
}
.physics-calculator-input:focus,
.physics-calculator-select:focus {
    outline: 2px solid var(--primary, #2563eb);
    outline-offset: 1px;
}
.physics-calculator-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.physics-calculator-btn {
    padding: 7px 14px;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: var(--radius-sm, 8px);
    background: var(--bg-btn, #f3f4f6);
    color: var(--text, #1f2328);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s ease;
}
.physics-calculator-btn:hover { background: var(--bg-btn-hover, #e5e7eb); }
.physics-calculator-btn-primary {
    background: var(--primary, #2563eb);
    border-color: var(--primary, #2563eb);
    color: #fff;
}
.physics-calculator-btn-primary:hover { background: var(--primary-hover, #1d4ed8); }
.physics-calculator-kv { display: flex; flex-direction: column; gap: 4px; }
.physics-calculator-kv-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    padding: 5px 8px;
    background: var(--bg-btn, #f3f4f6);
    border-radius: 6px;
    font-size: 13px;
}
.physics-calculator-kv-row.physics-calculator-kv-err { background: rgba(220, 38, 38, 0.08); }
.physics-calculator-kvk { color: var(--text-secondary, #6b7280); flex: 0 0 auto; }
.physics-calculator-kvv { color: var(--text, #1f2328); font-weight: 600; text-align: right; word-break: break-all; }
@media (max-width: 760px) {
    .physics-calculator-grid { grid-template-columns: 1fr; }
    .physics-calculator-col { gap: 12px; }
    .physics-calculator-panel { padding: 10px; }
}