body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, sans-serif;
    background: #f4f6fb;
    color: #1f2937;
}

.page {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

.card {
    background: #ffffff;
    border-radius: 8px;
    padding: 32px;
    box-shadow: 0 18px 45px rgba(31, 41, 55, 0.12);
}

h1,
h2 {
    margin-top: 0;
}

.intro {
    margin-bottom: 28px;
    color: #4b5563;
}

.section {
    margin-bottom: 24px;
}

.row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.field {
    min-width: 220px;
}

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

.text-input {
    width: 100%;
    box-sizing: border-box;
    padding: 11px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 15px;
}

.small-input {
    max-width: 180px;
}

.button {
    background: #14532d;
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 12px 18px;
    cursor: pointer;
    font-size: 15px;
}

.button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.button.secondary {
    background: #475569;
}

.actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.question-box,
.result-box,
.status {
    display: block;
    background: #f8fafc;
    border: 1px solid #dbe4ef;
    border-radius: 8px;
    padding: 18px;
    line-height: 1.6;
}

.question-box {
    margin-bottom: 16px;
    font-size: 20px;
    font-weight: 600;
}

.result-box {
    margin-bottom: 16px;
}

.status {
    margin-top: 24px;
}

@media (max-width: 640px) {
    .page {
        margin: 20px auto;
        padding: 0 12px;
    }

    .card {
        padding: 22px;
    }

    .field,
    .small-input {
        min-width: 100%;
        max-width: 100%;
    }
}