* {
    box-sizing: border-box;
}

body {
    margin: 0 auto;
    padding: 24px;
    max-width: 900px;
    font-family: "Segoe UI", Tahoma, sans-serif;
    font-size: 15px;
    color: #1f2933;
    background: #f5f7fa;
}

h1 {
    margin: 0 0 8px;
    font-size: 26px;
    color: #14532d;
}

h2 {
    margin: 28px 0 10px;
    font-size: 19px;
    color: #166534;
}

.meta {
    margin: 0 0 16px;
    color: #52606d;
}

.ok {
    padding: 10px 14px;
    border-left: 4px solid #15803d;
    border-radius: 4px;
    background: #dcfce7;
    color: #14532d;
}

.error {
    padding: 10px 14px 10px 30px;
    border-left: 4px solid #b91c1c;
    border-radius: 4px;
    background: #fee2e2;
    color: #7f1d1d;
}

.nav a {
    display: inline-block;
    margin-right: 12px;
    padding: 8px 14px;
    border: 1px solid #15803d;
    border-radius: 4px;
    color: #15803d;
    text-decoration: none;
}

.nav a:hover {
    background: #15803d;
    color: #ffffff;
}

.cats {
    margin: 0;
    padding-left: 20px;
}

table {
    width: 100%;
    margin-top: 10px;
    border-collapse: collapse;
    background: #ffffff;
}

th,
td {
    padding: 8px 10px;
    border: 1px solid #d7dee5;
    text-align: left;
}

th {
    background: #e8f0e9;
}

tr:nth-child(even) td {
    background: #fafcfa;
}

.total {
    margin-top: 14px;
    font-weight: bold;
}

form {
    margin-top: 16px;
    padding: 16px;
    border: 1px solid #d7dee5;
    border-radius: 6px;
    background: #ffffff;
}

form p {
    display: flex;
    align-items: center;
    gap: 12px;
}

label {
    width: 140px;
}

input[type="text"],
select {
    flex: 1;
    padding: 6px 8px;
    border: 1px solid #b8c2cc;
    border-radius: 4px;
}

button {
    padding: 8px 18px;
    border: none;
    border-radius: 4px;
    background: #15803d;
    color: #ffffff;
    font-size: 15px;
    cursor: pointer;
}

button:hover {
    background: #166534;
}