* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f2f4f8;
    color: #1d2939;
}

.container {
    max-width: 760px;
    margin: 40px auto;
    padding: 0 16px 40px;
}

h1 {
    margin-bottom: 8px;
}

.subtitle {
    margin-top: 0;
    color: #475467;
}

.card {
    background: #ffffff;
    border: 1px solid #e4e7ec;
    border-radius: 10px;
    padding: 16px;
    margin-top: 16px;
}

.field-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #d0d5dd;
    border-radius: 8px;
    background: #fcfcfd;
}

button {
    margin-top: 14px;
    padding: 10px 16px;
    border: 0;
    border-radius: 8px;
    background: #175cd3;
    color: #ffffff;
    font-weight: 600;
    cursor: pointer;
}

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.output-card h2 {
    margin-top: 0;
}

#result {
    white-space: pre-wrap;
    word-break: break-word;
    min-height: 150px;
    background: #f9fafb;
    border: 1px solid #eaecf0;
    border-radius: 8px;
    padding: 12px;
    margin: 0;
}