* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background: #f4f7fb;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    color: #333;
}

.container {
    width: 100%;
    max-width: 900px;
    margin: 50px auto;
    padding: 0 20px;
}

.card {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}


.title {
    text-align: center;
    margin-bottom: 10px;
}

.title a {
    text-decoration: none;
    color: #1f4e8c;
    font-size: 32px;
    font-weight: 700;
}


.subtitle {
    text-align: center;
    color: #777;
    margin-bottom: 15px;
    font-size: 16px;
}


.guide {
    background: #f8fbff;
    border-radius: 12px;
    padding: 18px 25px;
    margin-bottom: 35px;
    line-height: 1.7;
    color: #555;
    font-size: 15px;
}


.upload-box {
    border: 2px dashed #9bb8dc;
    border-radius: 16px;
    padding: 50px 20px;
    text-align: center;
    background: #f8fbff;
}


.upload-box input {
    margin-top: 20px;
}


.option-area {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 35px 0;
    font-size: 18px;
}


.btn {
    display: block;
    width: 220px;
    margin: 0 auto;
    padding: 15px;
    border: none;
    border-radius: 10px;
    background: #1f4e8c;
    color: white;
    font-size: 18px;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
}


.btn:hover {
    background: #163a68;
}


.download-btn {
    background: #2e8b57;
}


.download-btn:hover {
    background: #236b43;
}


.new-btn {
    background: #777;
}


.new-btn:hover {
    background: #555;
}


.result {
    text-align: center;
    margin-top: 20px;
}


.file-list {
    background: #f8fbff;
    border-radius: 12px;
    padding: 20px;
    text-align: left;
}


.footer {
    text-align: center;
    margin-top: 25px;
    color: #999;
    font-size: 13px;
}

.footer-logo {
text-align: center;
width: 200px;
margin: 0 auto 20px;
opacity: 0.8;
}

.footer-logo img {
width: 100%;
height: auto;
}