body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f6f8fb;
    color: #222;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.topbar {
    background: #111827;
    color: #fff;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links a,
.link-button {
    color: #fff;
    margin-left: 12px;
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    font: inherit;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
}

.card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 1px 8px rgba(0,0,0,0.06);
    margin-bottom: 20px;
}

.small-card {
    max-width: 420px;
    margin: 60px auto;
}

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

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin: 16px 0;
}

.alert.success {
    background: #e8f7ee;
    color: #156c37;
}

.alert.error {
    background: #fdecec;
    color: #a12020;
}

.form-group {
    margin-bottom: 14px;
}

input, select, textarea, button {
    width: 100%;
    padding: 10px 12px;
    box-sizing: border-box;
    border: 1px solid #d0d7de;
    border-radius: 8px;
}

textarea {
    min-height: 100px;
}

button, .button {
    display: inline-block;
    width: auto;
    background: #1d4ed8;
    color: #fff;
    border: none;
    text-decoration: none;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
}

.checkbox input {
    width: auto;
}

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

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

.muted {
    color: #6b7280;
}

.danger {
    color: #b91c1c;
}

.code-block {
    background: #f3f4f6;
    border-radius: 8px;
    padding: 12px;
    white-space: pre-wrap;
    word-break: break-word;
    margin-bottom: 16px;
}