.container{max-width:1100px;margin:28px auto;padding:16px}

/* Grid and Responsiveness */
.grid{display:grid;grid-template-columns:1fr 380px;gap:22px;align-items:start}

@media (max-width: 1024px) {
    /* Stack the columns on tablets/mobile */
    .grid{grid-template-columns: 1fr; gap: 30px;}
    .container{margin: 16px auto; padding: 10px;}
    .title-lg{text-align: center;}
    .header-row{justify-content: center; flex-direction: column;}
    .small:nth-child(2) { margin-top: 5px; }
}

/* Card and Animation */
.card{padding:20px}

.price{font-weight:800}
.icon-badge{width:36px;height:36px;border-radius:8px;border:1px solid var(--border-color);display:flex;align-items:center;justify-content:center;font-weight:700;background:#fafaff}

/* Dropdown/Period Styles */
.product-dropdown{position:relative;margin-top:12px}
.product-select{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:12px;
    border-radius:10px;
    border:1px solid #e5e7eb;
    background:#fff;
    cursor:pointer;
    transition:box-shadow .2s,transform .2s, border-color .2s;
}
.product-select:hover{border-color:var(--accent)}
.product-select[aria-expanded="true"]{box-shadow:0 8px 30px rgba(91,70,255,0.08);transform:translateY(-2px);border-color:var(--accent)}
.product-options{
    position:absolute;
    left:0;
    right:0;
    top:calc(100% + 8px);
    background:var(--card);
    border-radius:var(--radius);
    box-shadow:0 12px 36px var(--shadow);
    z-index:999; /* HIGHEST Z-INDEX FOR OVERLAY */
    display:none;
    padding:16px;
    animation:pop .2s cubic-bezier(0.175, 0.885, 0.32, 1.27);
    max-height:400px; /* Default desktop max height */
    overflow-y:auto; /* Enabled scrolling globally */
    transform-origin: top;
}
@keyframes pop { 0% { opacity: 0; transform: scaleY(0.9) translateY(-10px); } 100% { opacity: 1; transform: scaleY(1) translateY(0); } }

/* Period Selector - UI ENHANCEMENT */
.period-select{
    padding:12px;
    border-radius:10px;
    border:1px solid #e5e7eb;
    background:#fff;
    display:flex;
    justify-content:space-between;
    align-items:center;
    cursor:pointer;
    transition:box-shadow .2s, border-color .2s;
}
.period-select:hover{
    border-color: var(--accent);
    box-shadow: 0 4px 10px rgba(91,70,255,0.04);
}
.period-select[aria-expanded="true"]{
    border-color: var(--accent);
}

.period-options{
    position:absolute;
    background:var(--card);
    border-radius:10px;
    box-shadow:0 12px 36px var(--shadow);
    padding:8px;
    width:100%; /* Changed from 340px to 100% for better responsiveness */
    z-index:80;
    display:none;
    margin-top: 8px; /* Added margin for separation */
    animation:pop .2s cubic-bezier(0.175, 0.885, 0.32, 1.27);
    transform-origin: top;
}
@media (max-width: 600px) { .period-options { width: 100%; } }

.period-option{
    padding:12px; /* Increased padding */
    border-radius:8px;
    cursor:pointer;
    display:flex;
    justify-content:space-between;
    align-items:center;
    gap:10px;
    transition:background .1s, border-color .1s;
    border: 1px solid transparent;
}
.period-option:hover{
    background:#f5f5ff;
    border-color: #e5e7eb; /* Subtle border on hover */
}
.period-option.selected {
    background: #f8faff;
    border-color: var(--accent);
    border-width: 2px;
    padding: 11px;
}

/* --- Grouped UI Elements --- */
.group-tabs {
    display: flex;
    overflow-x: auto;
    white-space: nowrap;
    margin-bottom: 12px;
    padding-bottom: 4px; 
    border-bottom: 1px solid var(--border-color);
}
.group-tab-btn {
    flex-shrink: 0;
    padding: 8px 16px;
    margin-right: 8px;
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 600;
    color: var(--muted);
    border-bottom: 2px solid transparent;
    transition: all .15s ease;
    border-radius: 6px 6px 0 0;
}
.group-tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background: #f5f5ff; 
}
.tab-content {
    display: none;
    max-height: unset; /* Let the parent .product-options control the max height/scrolling */
    overflow-y: visible; 
    padding: 0 4px;
}
.tab-content.active {
    display: block;
}
.grouped-product-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 0;
}
.product-option.grouped-item {
    cursor: pointer;
    transition: all .2s;
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.product-option.grouped-item:hover {
    background: #f5f5ff; 
    border-color: var(--accent);
    transform: translateY(-2px);
}
.product-option.grouped-item.selected {
    border-width: 2px;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(91, 70, 255, 0.1);
    background: #f8faff;
    transform: none; 
}
.prod-name { font-weight: 700; font-size: 15px; }
.prod-meta { font-size: 13px; color: var(--muted); margin-top: 4px; }

/* --- MOBILE UI FIX: Constrain Dropdown Height (Now with !important) --- */
@media (max-width: 1024px) {
    .product-options {
        /* Set max height relative to viewport on mobile/tablet */
        max-height: 70vh !important; 
        overflow-y: auto !important; 
    }
}
/* --- END UI ELEMENTS --- */