/* --- Animations --- */
.invoice-item {
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.invoice-item.fade-out {
    opacity: 0;
    transform: translateX(30px);
}

.invoice-item.fade-in {
    opacity: 0;
    transform: translateX(-30px);
}

/* --- Tooltips --- */
.tooltip-inner {
    background-color: var(--accent-purple);
    color: var(--white);
    border-radius: var(--control-radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.tooltip.bs-tooltip-top .tooltip-arrow::before {
    border-top-color: var(--accent-purple);
}

.tooltip.bs-tooltip-end .tooltip-arrow::before {
    border-right-color: var(--accent-purple);
}

/* --- Components --- */
#addInvoiceItem {
    position: absolute;
    bottom: 1.5rem;
    right: 1.5rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    padding: 0;
    z-index: 10;
}

#addInvoiceItem:disabled {
    background: var(--muted);
    opacity: 0.5;
    transform: none;
    box-shadow: none;
}

#responseDisplay {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-size: 0.875rem;
    background-color: rgba(0,0,0,0.2);
    color: var(--muted);
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
}

.invoice-item {
    position: relative;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: var(--card-radius);
    background-color: transparent;
    transition: border-color 0.2s;
}

.invoice-item:hover {
    border-color: var(--accent-purple);
}

.invoice-item h4 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--pastel);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.invoice-item .btn-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* --- Download Popup --- */
.dl-popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1060; /* Higher than Bootstrap's modal z-index */
    opacity: 0;
    transition: opacity 0.3s ease;
}

.dl-popup-overlay.visible {
    opacity: 1;
}

.dl-popup-card {
    position: relative;
    padding: 2.5rem 3rem;
    background: var(--bg-color);
    border-radius: var(--card-radius);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    text-align: center;
    transform: scale(0.8);
    transition: transform 0.3s ease;
    max-width: 90%;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
}

.dl-popup-overlay.visible .dl-popup-card {
    transform: scale(1);
}

.popup-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    filter: invert(1) grayscale(100%) brightness(200%);
    opacity: 0.7;
    transition: opacity 0.2s;
}

.popup-close-btn:hover {
    opacity: 1;
}

.popup-message {
    margin-top: 1.5rem;
    font-size: 1.125rem;
    color: var(--text-color);
    font-weight: 500;
}

/* --- Download Icon Animation --- */
.download-animation {
    width: 64px;
    height: 64px;
    margin: 0 auto;
    color: var(--accent-purple);
}

.download-icon .arrow {
    animation: arrow-move 1.5s infinite ease-in-out;
}

.download-icon .tray {
    
}

@keyframes arrow-move {
    0% { transform: translateY(-8px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(8px); opacity: 0; }
}