:root {
    --bg: #f6f7f9;
    --panel: #ffffff;
    --ink: #20242c;
    --muted: #626b7a;
    --line: #dfe4ea;
    --primary: #176b5b;
    --primary-dark: #0f4f43;
    --danger-bg: #fff1f1;
    --danger: #a52828;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
}

a {
    color: inherit;
    text-decoration: none;
}

.topbar {
    align-items: center;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    display: flex;
    gap: 20px;
    min-height: 64px;
    padding: 0 24px;
}

.brand {
    font-size: 18px;
    font-weight: 700;
    white-space: nowrap;
}

.nav {
    display: flex;
    gap: 8px;
}

.nav a,
.button,
button {
    border: 1px solid var(--line);
    border-radius: 6px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0 14px;
    font: inherit;
}

.nav a:hover,
.button:hover,
button:hover {
    background: #eef2f4;
}

.logout-form {
    align-items: center;
    display: flex;
    gap: 10px;
    margin-left: auto;
}

.logout-form span {
    color: var(--muted);
    font-size: 14px;
}

.page {
    margin: 0 auto;
    max-width: 1180px;
    padding: 28px 24px 48px;
}

.page-header {
    align-items: center;
    display: flex;
    gap: 18px;
    justify-content: space-between;
    margin-bottom: 22px;
}

h1,
h2,
p {
    margin-top: 0;
}

h1 {
    font-size: 28px;
    margin-bottom: 6px;
}

h2 {
    font-size: 20px;
    margin-bottom: 14px;
}

p {
    color: var(--muted);
    margin-bottom: 0;
}

.primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.primary:hover {
    background: var(--primary-dark);
}

.alert {
    background: var(--danger-bg);
    border: 1px solid #f2c6c6;
    border-radius: 6px;
    color: var(--danger);
    margin-bottom: 18px;
    padding: 12px 14px;
}

.auth-panel,
.form.wide,
.section,
.table-wrap {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.auth-panel {
    margin: 80px auto 0;
    max-width: 420px;
    padding: 28px;
}

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

.form.wide {
    padding: 22px;
}

.form-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
    color: var(--muted);
    display: grid;
    font-size: 14px;
    font-weight: 700;
    gap: 7px;
}

input,
select,
textarea {
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    font: inherit;
    min-height: 40px;
    padding: 9px 10px;
    width: 100%;
}

textarea {
    resize: vertical;
}

.actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.stats-grid {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-bottom: 24px;
}

.stat {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 18px;
}

.stat span {
    color: var(--muted);
    display: block;
    font-size: 14px;
    text-transform: capitalize;
}

.stat strong {
    display: block;
    font-size: 34px;
    margin-top: 6px;
}

.section {
    padding: 20px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    min-width: 760px;
    width: 100%;
}

th,
td {
    border-bottom: 1px solid var(--line);
    padding: 12px 14px;
    text-align: left;
    vertical-align: top;
}

th {
    background: #fbfcfd;
    color: var(--muted);
    font-size: 13px;
    text-transform: uppercase;
}

tr:last-child td {
    border-bottom: 0;
}

.badge {
    background: #e9f4f1;
    border-radius: 999px;
    color: var(--primary-dark);
    display: inline-block;
    font-size: 13px;
    padding: 4px 9px;
    text-transform: capitalize;
}

@media (max-width: 760px) {
    .topbar {
        align-items: stretch;
        flex-direction: column;
        gap: 10px;
        padding: 14px;
    }

    .nav {
        flex-wrap: wrap;
    }

    .logout-form {
        margin-left: 0;
    }

    .page {
        padding: 20px 14px 36px;
    }

    .page-header,
    .actions {
        align-items: stretch;
        flex-direction: column;
    }

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

    .auth-panel {
        margin-top: 24px;
    }
}