:root {
            --primary: #4285F4;
            --red: #EA4335;
            --green: #34A853;
            --yellow: #FBBC05;
            --gray: #9AA0A6;
            --light-gray: #F1F3F4;
            --dark-gray: #3C4043;
            --white: #FFFFFF;
            --border: #DADCE0;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Roboto', Arial, sans-serif;
        }

        body {
            background-color: var(--white);
            color: var(--dark-gray);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 24px;
        }

        header {
            margin-bottom: 40px;
            text-align: center;
        }

        .logo {
            font-size: 32px;
            font-weight: 500;
            margin-bottom: 8px;
            color: var(--dark-gray);
        }

        .logo span {
            color: var(--primary);
        }

        .subtitle {
            color: var(--gray);
            font-weight: 300;
        }

        .container {
            width: 100%;
            max-width: 580px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .upload-card {
            width: 100%;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 24px;
            margin-bottom: 24px;
            transition: all 0.2s;
            cursor: pointer;
        }

        .upload-card:hover {
            border-color: var(--primary);
            box-shadow: 0 1px 6px rgba(32, 33, 36, 0.08);
        }

        .upload-content {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .upload-icon {
            width: 48px;
            height: 48px;
            background-color: var(--light-gray);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .upload-text {
            font-size: 14px;
            color: var(--gray);
            margin-bottom: 16px;
            text-align: center;
        }

        .btn {
            background-color: var(--primary);
            color: var(--white);
            border: none;
            border-radius: 4px;
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .btn:hover {
            background-color: #3367D6;
            box-shadow: 0 1px 2px rgba(66, 133, 244, 0.3);
        }

        .btn:disabled {
            background-color: var(--light-gray);
            color: var(--gray);
            cursor: not-allowed;
            box-shadow: none;
        }

        .file-input {
            display: none;
        }

        .loading-container {
            display: none;
            flex-direction: column;
            align-items: center;
            margin: 24px 0;
        }

        .loading-spinner {
            width: 40px;
            height: 40px;
            border: 3px solid rgba(66, 133, 244, 0.2);
            border-top: 3px solid var(--primary);
            border-radius: 50%;
            animation: spin 1s linear infinite;
            margin-bottom: 16px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .loading-text {
            color: var(--gray);
            font-size: 14px;
        }

        .result-container {
            width: 100%;
            display: none;
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 1px 6px rgba(32, 33, 36, 0.08);
        }

        .result-image {
            width: 100%;
            height: auto;
            display: block;
        }

        .result-details {
            padding: 16px;
        }

        .result-title {
            font-size: 18px;
            font-weight: 500;
            margin-bottom: 12px;
            color: var(--dark-gray);
        }

        .detail-item {
            display: flex;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .detail-label {
            font-weight: 500;
            color: var(--dark-gray);
            min-width: 80px;
        }

        .detail-value {
            color: var(--gray);
        }

        .accuracy-high {
            color: var(--green);
        }

        .accuracy-medium {
            color: var(--yellow);
        }

        .accuracy-low {
            color: var(--red);
        }

        .error-message {
            color: var(--red);
            font-size: 14px;
            margin-top: 8px;
            display: none;
        }