:root {
    --background-color: #1a1a1a;
    --text-color: #fff;
    --border-color: #333;
    --hover-color: #2d2d2d;
    --buy-color: #4ade80;
    --sell-color: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.filters {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#categoryFilter, #searchInput {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    background-color: var(--background-color);
    color: var(--text-color);
    border-radius: 4px;
}

#categoryFilter {
    min-width: 200px;
}

#searchInput {
    flex-grow: 1;
}

.refresh-button {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.refresh-button:hover {
    background-color: var(--hover-color);
}

.refresh-button svg {
    transition: transform 0.5s;
}

.refresh-button.refreshing svg {
    transform: rotate(360deg);
}

.refresh-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.refresh-button:disabled:hover {
    background-color: var(--background-color);
}

#refreshTimer {
    min-width: 24px;
    text-align: center;
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-bottom: 30px;
}

.item-card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 10px;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s;
    position: relative;
}

.item-card:hover {
    background-color: var(--hover-color);
}

.item-icon {
    width: 48px;
    height: 48px;
    display: block;
    margin: 0 auto;
}

.item-tooltip {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.9);
    padding: 8px;
    border-radius: 4px;
    white-space: nowrap;
    z-index: 100;
}

.item-card:hover .item-tooltip {
    display: block;
}

.category-title {
    margin: 20px 0 10px;
    padding-bottom: 5px;
    border-bottom: 2px solid var(--border-color);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
}

.modal-content {
    position: relative;
    background-color: var(--background-color);
    margin: 5% auto;
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 90%;
    max-width: 800px;
}

.close {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 28px;
    cursor: pointer;
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.modal-item-info {
    flex-grow: 1;
}

#modalItemIcon {
    width: 64px;
    height: 64px;
}

.price-info-container {
    margin: 20px 0;
}

.price-info-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.price-box {
    flex: 1;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.price-box.buy {
    border: 1px solid var(--buy-color);
}

.price-box.sell {
    border: 1px solid var(--sell-color);
}

.chart-container {
    height: 300px;
    margin: 20px 0;
}

input[type="number"], input[type="text"], select {
    background-color: var(--background-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 5px 8px;
    border-radius: 4px;
}

.loading, .error {
    text-align: center;
    padding: 20px;
    color: #888;
}