:root {
    --navy: #172b4d;
    --blue: #2563eb;
    --background: #f3f6fb;
    --border: #dce3ed;
    --text: #243247;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: var(--background);
    color: var(--text);
}

header {
    background: var(--navy);
    padding: 18px 28px;
    color: white;
}

.brand {
    font-size: 23px;
    font-weight: bold;
    margin-bottom: 16px;
}

.brand span {
    font-size: 14px;
    font-weight: normal;
    color: #b9c9e2;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

nav a {
    color: white;
    text-decoration: none;
    padding: 10px 14px;
    border-radius: 7px;
}

nav a:hover {
    background: #30476b;
}

.container {
    max-width: 1250px;
    margin: 30px auto;
    padding: 0 20px;
}

.card {
    background: white;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    background: var(--blue);
    color: white;
    border: 0;
    border-radius: 7px;
    padding: 11px 17px;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
}

.btn:hover {
    background: #1d4ed8;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
}

input, select, textarea {
    width: 100%;
    padding: 11px;
    border: 1px solid #cbd5e1;
    border-radius: 7px;
    font: inherit;
}

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

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #edf2f9;
}

@media (max-width: 700px) {
    header {
        padding: 16px;
    }

    nav a {
        padding: 9px;
    }

    .container {
        margin-top: 18px;
        padding: 0 12px;
    }

    .card {
        padding: 16px;
    }
}