/* Popup calculator + VAT / margin tools — left dock, above theme toggle */

.qre-calc-fab {
    position: fixed;
    left: var(--qre-dock-right, 16px);
    bottom: calc(var(--qre-dock-fab-bottom, 20px) + 58px);
    z-index: 30140;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    border: 1px solid var(--glass-border, var(--color-border));
    background: var(--glass-surface, var(--color-surface));
    color: var(--color-text);
    box-shadow: var(--shadow-sm, 0 8px 24px rgba(15, 23, 42, 0.12));
    cursor: pointer;
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.02em;
    backdrop-filter: var(--glass-blur, blur(12px) saturate(140%));
    -webkit-backdrop-filter: var(--glass-blur, blur(12px) saturate(140%));
}
.qre-calc-fab:hover,
.qre-calc-fab:focus-visible {
    border-color: color-mix(in srgb, var(--brand-primary, #2b5ed9) 55%, var(--color-border));
    background: color-mix(in srgb, var(--brand-primary, #2b5ed9) 12%, var(--color-surface));
}
.qre-calc-fab[aria-pressed="true"] {
    background: var(--brand-primary, #2b5ed9);
    color: var(--btn-on-primary, #fff);
    border-color: var(--brand-primary, #2b5ed9);
}

.qre-calc-panel {
    position: fixed;
    left: var(--qre-dock-right, 16px);
    bottom: calc(var(--qre-dock-fab-bottom, 20px) + 116px);
    z-index: 30141;
    width: min(320px, calc(100vw - 24px));
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    border-radius: 16px;
    border: 1px solid var(--glass-border, var(--color-border));
    background: var(--glass-surface, var(--ui-surface-glass, var(--color-surface)));
    box-shadow: var(--ui-panel-shadow, 0 18px 48px rgba(15, 23, 42, 0.22));
    backdrop-filter: var(--glass-blur, blur(16px) saturate(150%));
    color: var(--color-text);
}
.qre-calc-panel.open { display: flex; }
.qre-calc-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    cursor: grab;
}
.qre-calc-head h2 {
    margin: 0;
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}
.qre-calc-modes {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}
.qre-calc-modes button,
.qre-calc-keys button,
.qre-calc-close {
    border: 1px solid var(--color-border);
    background: var(--color-surface-raised, var(--color-surface));
    color: var(--color-text);
    border-radius: 10px;
    font-weight: 700;
    cursor: pointer;
}
.qre-calc-modes button {
    padding: 6px 4px;
    font-size: 0.72rem;
}
.qre-calc-modes button[aria-pressed="true"] {
    background: color-mix(in srgb, var(--brand-primary, #2b5ed9) 16%, var(--color-surface));
    border-color: color-mix(in srgb, var(--brand-primary, #2b5ed9) 48%, var(--color-border));
}
.qre-calc-display {
    min-height: 48px;
    padding: 10px 12px;
    border-radius: 12px;
    background: var(--color-surface-raised, #0f172a);
    color: var(--color-text);
    font-family: var(--font-display, ui-monospace, monospace);
    font-size: 1.35rem;
    text-align: right;
    word-break: break-all;
    border: 1px solid var(--color-border);
}
.qre-calc-sub {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    min-height: 1.1em;
}
.qre-calc-keys {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}
.qre-calc-keys button {
    min-height: 40px;
    font-size: 0.95rem;
}
.qre-calc-keys button[data-op="eq"] {
    background: var(--brand-primary, #2b5ed9);
    color: var(--btn-on-primary, #fff);
    border-color: var(--brand-primary, #2b5ed9);
}
.qre-calc-close {
    padding: 4px 8px;
    font-size: 0.72rem;
}
.qre-calc-hint {
    margin: 0;
    font-size: 0.68rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}
.qre-calc-vat-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 6px;
    align-items: center;
}
.qre-calc-vat-row input {
    min-height: 36px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    padding: 0 8px;
}
.qre-calc-result-card {
    border: 1px dashed var(--color-border);
    border-radius: 10px;
    padding: 8px;
    font-size: 0.8rem;
    display: grid;
    gap: 3px;
    min-height: 4.2em;
}
.qre-calc-result-card strong { font-size: 0.95rem; }
.qre-calc-check {
    font-size: 0.75rem;
    display: flex;
    gap: 6px;
    align-items: center;
}
#qre-calc-vat[hidden],
#qre-calc-margin[hidden] {
    display: none !important;
}
#qre-calc-vat:not([hidden]),
#qre-calc-margin:not([hidden]) {
    display: grid;
    gap: 8px;
}

@media (max-width: 640px) {
    .qre-calc-fab { width: 44px; height: 44px; }
}