/* ── CALCULATOR POPUP ────────────────────────────────────── */
#calcPopup {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.55);
}
#calcPopup.open { display: flex; }
.calc-popup-inner {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 24px;
    width: 320px;
    max-width: 92vw;
    position: relative;
    box-shadow: 0 16px 48px rgba(0,0,0,0.6);
}
.calc-popup-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
}
.calc-popup-close {
    position: absolute;
    top: 12px;
    right: 14px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    cursor: pointer;
    line-height: 1;
    padding: 2px 6px;
    border-radius: 4px;
}
.calc-popup-close:hover { background: var(--surface-2); color: var(--text-primary); }
.calc-popup-close:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.calc-field input {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    padding: 7px 10px;
    box-sizing: border-box;
}
.calc-field input:focus { outline: 2px solid var(--accent); border-color: transparent; }
.calc-converter-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 4px;
}
.calc-amount-box {
    display: flex;
    align-items: stretch;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface-2);
}
.calc-amount-box:focus-within {
    outline: 2px solid var(--accent);
    border-color: transparent;
}
.calc-amount-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 1.15rem;
    font-family: inherit;
    padding: 14px 14px;
    min-width: 0;
}
.calc-currency-select {
    background: var(--surface);
    border: none;
    border-left: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    padding: 0 12px;
    cursor: pointer;
    min-width: 80px;
    flex-shrink: 0;
}
.calc-currency-select:focus { outline: none; }
.calc-swap-wrap {
    display: flex;
    justify-content: center;
}
.calc-swap-btn {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--accent);
    font-size: 1.1rem;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, transform 0.15s;
}
.calc-swap-btn:hover { background: var(--border); transform: rotate(180deg); }
.calc-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 14px 0;
}
.calc-custom-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.calc-live-rate {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 10px;
    text-align: center;
}