* {
    box-sizing: border-box;
    font-family: 'Noto Sans KR', sans-serif;
}
body {
    margin: 0;
    padding: 20px;
    background-color: #f8f9fa;
    color: #333;
}
.container {
    max-width: 800px;
    margin: 0 auto;
}
.title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #4285f4;
    margin-bottom: 10px;
}
.subtitle {
    font-size: 1rem;
    color: #666;
    margin-bottom: 20px;
}
.ziptotxt-box {
    background: linear-gradient(135deg, #f8f9fa, #e8f0fe);
    border-radius: 8px;
    padding: 25px;
    margin: 20px 0;
    box-shadow: 0 4px 10px rgba(66, 133, 244, 0.08);
    border-left: 4px solid #4285f4;
}
.section-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #4285f4;
    margin-bottom: 20px;
}
.drop-zone {
    border: 2px dashed #ccc;
    padding: 10px;
    text-align: center;
    cursor: pointer;
    border-radius: 8px;
    background-color: #fff;
    margin-bottom: 20px;
}
.drop-zone.hover {
    background-color: #e8f0fe;
}
.hidden {
    display: none;
}
.error-message {
    color: #d32f2f;
    font-size: 0.9rem;
    margin-top: 5px;
}
.loading-message {
    font-size: 1rem;
    color: #666;
    margin-bottom: 20px;
}
textarea {
    width: 100%;
    height: 250px;
    /*padding: 10px;*/
    font-family: monospace;
    font-size: 0.9rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    resize: vertical;
}
.button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}
.primary-button {
    background-color: #4285f4;
    color: white;
}
.secondary-button {
    background-color: #f8f9fa;
    color: #666;
    border: 1px solid #ddd;
}
.button:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}