* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, sans-serif;
    background: #f4f7fb;
    color: #1d2430;
}

.container {
    max-width: 760px;
    margin: 32px auto;
    padding: 24px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(10, 30, 60, 0.08);
}

h1 {
    margin: 0 0 8px;
    font-size: 1.8rem;
}

.subtitle {
    margin: 0 0 20px;
    color: #4b5563;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
}

textarea,
select,
button {
    width: 100%;
    border-radius: 8px;
    border: 1px solid #cfd8e3;
    font-size: 1rem;
}

textarea {
    min-height: 130px;
    padding: 12px;
    resize: vertical;
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin: 16px 0;
}

select {
    padding: 10px;
    background: #fff;
}

button {
    padding: 12px;
    background: #2563eb;
    color: #fff;
    border: none;
    font-weight: 600;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

button:disabled {
    background: #93c5fd;
    cursor: not-allowed;
}

.status {
    margin: 10px 0 16px;
    color: #4b5563;
}

.output {
    min-height: 120px;
    background: #eef2ff;
    border: 1px solid #c7d2fe;
    border-radius: 8px;
    padding: 12px;
    white-space: pre-wrap;
    line-height: 1.5;
}

.site-footer {
    margin-top: 20px;
    padding-top: 14px;
    border-top: 1px solid #e5e7eb;
    color: #4b5563;
    font-size: 0.92rem;
}

.site-footer p {
    margin: 4px 0;
}