body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f4f4f4;
    color: #222;
}

main {
    max-width: 1000px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
}

h1 {
    margin-top: 0;
}

.box {
    background: #eef3f7;
    padding: 15px;
    margin: 20px 0;
    border-left: 5px solid #336699;
}

nav a {
    display: inline-block;
    margin-right: 12px;
    padding: 10px 14px;
    background: #336699;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
}

nav a:hover {
    background: #244d73;
}

form {
    display: grid;
    gap: 14px;
    max-width: 600px;
}

label {
    display: grid;
    gap: 5px;
    font-weight: bold;
}

input, select, textarea, button {
    padding: 10px;
    font-size: 16px;
}

textarea {
    min-height: 100px;
}

button {
    background: #336699;
    color: white;
    border: 0;
    cursor: pointer;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

th, td {
    border-bottom: 1px solid #ddd;
    padding: 10px;
    text-align: left;
}

th {
    background: #eef3f7;
}

.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #eef3f7;
    border-left: 5px solid #336699;
    padding: 22px;
    border-radius: 8px;
    margin-bottom: 28px;
}

.hero h1 {
    margin: 0 0 6px 0;
}

.hero p {
    margin: 0;
    color: #555;
}

.form-card {
    display: grid;
    gap: 18px;
    max-width: none;
}

.section-title {
    font-size: 18px;
    font-weight: bold;
    color: #244d73;
    border-bottom: 1px solid #dce3ea;
    padding-bottom: 8px;
    margin-top: 12px;
}

.form-grid {
    display: grid;
    gap: 16px;
}

.form-grid.two {
    grid-template-columns: 1fr 1fr;
}

.form-grid.three {
    grid-template-columns: 1fr 1fr 1fr;
}

.form-card label {
    font-weight: bold;
    color: #333;
}

.form-card input,
.form-card select,
.form-card textarea {
    margin-top: 6px;
    border: 1px solid #ccd5dd;
    border-radius: 5px;
    background: #fff;
}

.result-box {
    background: #f8fafc;
    border: 1px solid #dce3ea;
    border-left: 5px solid #336699;
    padding: 18px;
    border-radius: 8px;
}

.result-value {
    display: inline-block;
    margin-top: 8px;
    font-size: 28px;
    font-weight: bold;
    color: #244d73;
}

.hint {
    color: #777;
}

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

.nav-btn {
    display: inline-block;
    padding: 10px 14px;
    background: #336699;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    border: 0;
    font-size: 16px;
    cursor: pointer;
}

.nav-btn:hover {
    background: #244d73;
}

.nav-btn.muted {
    background: #e5e9ee;
    color: #222;
}

.nav-btn.muted:hover {
    background: #d4dbe3;
}

.nav-btn.save {
    background: #2f6f3e;
}

.nav-btn.save:hover {
    background: #245832;
}

@media (max-width: 800px) {
    .hero,
    .form-grid.two,
    .form-grid.three {
        display: grid;
        grid-template-columns: 1fr;
    }
}
label small {
    display: block;
    font-weight: normal;
    color: #667;
    font-size: 13px;
    line-height: 1.35;
    margin-top: 4px;
}

.help-box {
    background: #eef3f7;
    border-left: 5px solid #336699;
    padding: 14px 16px;
    border-radius: 6px;
    color: #334;
    line-height: 1.45;
}

.schema-block {
    display: none;
    background: #fafcff;
    border: 1px solid #dce3ea;
    border-radius: 8px;
    padding: 18px;
}

label small {
    display: block;
    font-weight: normal;
    color: #667;
    font-size: 13px;
    line-height: 1.35;
    margin-top: 4px;
}

.help-box {
    background: #eef3f7;
    border-left: 5px solid #336699;
    padding: 14px 16px;
    border-radius: 6px;
    color: #334;
    line-height: 1.45;
}