* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    color: #1f2937;
}

.container {
    width: min(900px, calc(100% - 32px));
    margin: 60px auto;
}

.header {
    margin-bottom: 30px;
}

.header h1 {
    margin-bottom: 8px;
}

.header p {
    margin: 0;
    color: #6b7280;
}

.card {
    background: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: 24px;
}

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

label span {
    font-weight: normal;
    color: #6b7280;
}

input,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font: inherit;
}

textarea {
    resize: vertical;
    font-family: monospace;
}

button {
    padding: 12px 24px;
    border: 0;
    border-radius: 6px;
    background: #2563eb;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

button:disabled {
    opacity: 0.6;
    cursor: wait;
}

.result {
    margin-top: 30px;
    padding: 20px;
    background: #f3f4f6;
    border-radius: 6px;
}