* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f7f8fa;
        }
        
        .container {
            max-width: 640px;
            margin: 0 auto;
            padding: 0;
            background-color: #fff;
        }
        
        header {
            background: linear-gradient(180deg, rgba(0,0,0,0.06), rgba(0,0,0,0) 70%), #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 2px rgba(0,0,0,0.05);
            max-width: 640px;
            margin: 0 auto;
        }
        
        .header-content {
            display: flex !important;
            justify-content: space-between !important;
            align-items: center !important;
            padding: 12px 16px;
            width: 100%;
            flex-wrap: nowrap;
            min-height: 56px;
            white-space: nowrap;
        }
        .header-left {
            display: flex !important;
            align-items: center !important;
            gap: 8px;
            margin-right: auto;
        }
        
        .logo {
            font-size: 20px;
            font-weight: bold;
            color: #212124;
            text-decoration: none;
            display: flex !important;
            align-items: center;
            flex: 0 0 auto;
            margin-left: 0;
        }
        
        .logo img {
            height: 32px;
            width: auto;
            display: block;
            flex-shrink: 0;
        }
        
        .header-icons {
            display: flex !important;
            gap: 16px;
            align-items: center;
            flex: 0 0 auto;
            margin-left: auto;
        }
        
        .icon-btn {
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            line-height: 0;
        }
        .icon-btn svg { display: block; }
        
        .icon-btn svg {
            width: 24px;
            height: 24px;
        }
        
        .search-bar {
            padding: 8px 16px 12px;
            background-color: #fff;
        }
        
        .search-bar input {
            width: 100%;
            padding: 12px 16px 12px 44px;
            border: 1px solid rgba(0,0,0,0.06);
            border-radius: 24px;
            font-size: 15px;
            background-color: #fff;
            background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="%23868b94" stroke-width="2"><circle cx="11" cy="11" r="8"/><path d="m21 21-4.35-4.35"/></svg>');
            background-repeat: no-repeat;
            background-position: 12px center;
            background-size: 20px 20px;
            box-shadow: 0 1px 0 rgba(0,0,0,0.02), 0 2px 8px rgba(0,0,0,0.06);
        }
        
        .search-bar input::placeholder {
            color: #b4b4b4;
        }
        
        main {
            min-height: calc(100vh - 200px);
            padding-bottom: 80px;
        }
        
        footer {
            display: none;
        }
        
        .messages {
            position: fixed;
            top: 80px;
            right: 20px;
            z-index: 1000;
            min-width: 300px;
        }
        
        .alert {
            padding: 15px;
            margin-bottom: 10px;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        
        .alert-success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }
        
        .alert-error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
        
        .alert-info {
            background-color: #d1ecf1;
            color: #0c5460;
            border: 1px solid #bee5eb;
        }
    

    /* 배너 섹션 */
    .info-banner {
        background-color: #fff;
        margin: 0;
        padding: 20px 16px;
        border-bottom: 8px solid #f7f8fa;
    }
    
    .banner-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .banner-text h2 {
        font-size: 17px;
        font-weight: bold;
        color: #212124;
        margin-bottom: 8px;
    }
    
    .banner-text p {
        font-size: 13px;
        color: #868b94;
        line-height: 1.5;
        margin-bottom: 12px;
    }
    
    .banner-link {
        font-size: 13px;
        color: #212124;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
    }
    
    .banner-link svg {
        width: 16px;
        height: 16px;
        margin-left: 4px;
    }
    
    .banner-image {
        width: 120px;
        height: 120px;
        flex-shrink: 0;
    }
    
    .banner-image img {
        width: 100%;
        height: 100%;
        object-fit: contain;
    }
    
    /* 섹션 헤더 */
    .section-header {
        padding: 20px 16px 12px;
        background-color: #fff;
    }
    
    .section-header h3 {
        font-size: 17px;
        font-weight: bold;
        color: #212124;
    }
    
    /* 상품 그리드 */
    .product-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0;
        background-color: #fff;
        padding: 0 8px;
    }
    
    .product-card {
        background-color: #fff;
        text-decoration: none;
        color: inherit;
        display: block;
        padding: 8px;
        position: relative;
    }
    
    .product-image-container {
        position: relative;
        width: 100%;
        padding-bottom: 100%;
        border-radius: 12px;
        overflow: hidden;
        background-color: #f7f8fa;
    }
    
    .product-image {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    
    .like-btn {
        position: absolute;
        bottom: 8px;
        right: 8px;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        background-color: rgba(255, 255, 255, 0.9);
        border: none;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        z-index: 10;
    }
    
    .like-btn svg {
        width: 18px;
        height: 18px;
    }
    
    .product-info {
        padding: 8px 0;
    }
    
    .product-title {
        font-size: 14px;
        color: #212124;
        margin-bottom: 4px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    .product-price {
        font-size: 16px;
        font-weight: bold;
        color: #212124;
        margin-bottom: 4px;
    }
    
    .product-meta {
        font-size: 12px;
        color: #868b94;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }
    
    .product-meta .time {
        margin-right: 4px;
    }
    
    .product-meta .divider {
        margin: 0 4px;
    }
    
    .product-meta .discount {
        color: #ff5058;
        font-weight: 600;
    }
    
    /* 판매하기 버튼 */
    .floating-sell-btn {
        position: fixed;
        bottom: 20px;
        right: 50%;
        transform: translateX(50%);
        max-width: 640px;
        width: calc(100% - 40px);
        z-index: 100;
    }
    
    .sell-btn {
        width: 100%;
        background-color: #212124;
        color: white;
        border: none;
        border-radius: 6px;
        padding: 14px;
        font-size: 15px;
        font-weight: bold;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        text-decoration: none;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }
    
    .sell-btn svg {
        width: 20px;
        height: 20px;
        margin-right: 6px;
    }