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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    text-align: center;
}

.page-title {
    font-size: 48px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.page-subtitle {
    font-size: 20px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 120px;
    max-width: 600px;
    line-height: 1.5;
}

.upload-button {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background-color: #ffffff;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-button:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.upload-button:active {
    transform: scale(0.95);
}

.upload-text {
    font-size: 24px;
    font-weight: 600;
    color: #667eea;
}

.status-message {
    margin-top: 30px;
    padding: 15px 30px;
    border-radius: 25px;
    background-color: rgba(255, 255, 255, 0.9);
    color: #333;
    font-size: 16px;
    text-align: center;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.status-message.visible {
    opacity: 1;
}

.status-message.success {
    background-color: rgba(76, 175, 80, 0.9);
    color: white;
}

.status-message.error {
    background-color: rgba(244, 67, 54, 0.9);
    color: white;
}

.status-message.uploading {
    background-color: rgba(33, 150, 243, 0.9);
    color: white;
}

.status-message.warning {
    background-color: rgba(255, 193, 7, 0.9);
    color: #333;
}

.details-message {
    margin-top: 15px;
    max-width: 600px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.details-message.visible {
    opacity: 1;
}

.detail-item {
    padding: 10px 20px;
    border-radius: 15px;
    margin-bottom: 8px;
    font-size: 14px;
    text-align: left;
}

.detail-item.warning {
    background-color: rgba(255, 193, 7, 0.9);
    color: #333;
}

.detail-item.error {
    background-color: rgba(244, 67, 54, 0.9);
    color: white;
}

@media (max-width: 768px) {
    .page-title {
        font-size: 36px;
        margin-bottom: 15px;
    }

    .page-subtitle {
        font-size: 18px;
        margin-bottom: 80px;
        padding: 0 10px;
    }

    .upload-button {
        width: 180px;
        height: 180px;
    }

    .upload-text {
        font-size: 22px;
    }

    .status-message {
        font-size: 14px;
        padding: 12px 24px;
    }

    .detail-item {
        font-size: 12px;
        padding: 8px 16px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 28px;
        margin-bottom: 12px;
    }

    .page-subtitle {
        font-size: 16px;
        margin-bottom: 60px;
    }

    .upload-button {
        width: 160px;
        height: 160px;
    }

    .upload-text {
        font-size: 20px;
    }
}