.app{width: min(1280px, calc(100% - 32px));margin: 22px auto 20px;background:#fffdf8;border:1px solid #e2d8c8;border-radius:14px;box-shadow:0 8px 30px rgba(20,30,50,.08);display:flex;flex-direction:column;overflow:}
.intro{padding: 16px 18px 12px;}
h1{font-size: 20px; margin: 0 0 5px;}
.intro p{color:var(--muted);font-size:13px;margin:0}
        .container {
            padding: 30px;
			text-align:center;
        }
        .upload-btn-wrapper {
            position: relative;
            overflow: hidden;
            display: inline-block;
			margin: 0 auto 20px auto;
        }
        .btn {
		    border:none;
            color:#fff;
            background-color: #c45c26;
            padding: 10px 20px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }
        .upload-btn-wrapper input[type=file] {
            font-size: 100px;
            position: absolute;
            left: 0;
            top: 0;
            opacity: 0;
            cursor: pointer;
        }
        .btn:hover, .btn-primary:hover {
            background-color: #a33b2b;
            color: white;
        }
        .btn-primary {
            background-color: #c45c26;
            color: white;
            border: none;
            padding: 12px 24px;
            font-size: 18px;
            border-radius: 8px;
            cursor: pointer;
            display: none; /* ĬÈÏÒþ²Ø */
            margin: 20px auto 0;
            transition: background 0.3s;
        }
        .btn-primary:disabled {
            background-color: #a5d6a7;
            cursor: not-allowed;
        }
        #preview {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 20px;
            justify-content: center;
        }
        .img-container {
            position: relative;
            width: 120px;
            height: 120px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }
        .img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .img-container .index-badge {
            position: absolute;
            top: 5px;
            left: 5px;
            background: rgba(0,0,0,0.6);
            color: white;
            font-size: 12px;
            padding: 2px 6px;
            border-radius: 12px;
        }
        .instructions {
            font-size: 14px;
            color: #666;
            margin-bottom: 20px;
        }