* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #0f1115;
    color: #f5f7fa;
}

a {
    color: #ff4d4f;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.brand {
    font-size: 24px;
    font-weight: bold;
    color: #ffffff;
}

.brand small {
    display: block;
    font-size: 12px;
    color: #b8c0cc;
    margin-top: 4px;
}

.card {
    background: #181c22;
    border: 1px solid #262c36;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 900px) {
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }
}

h1, h2, h3 {
    margin-top: 0;
}

label {
    display: block;
    margin-bottom: 6px;
    color: #d8dee9;
    font-size: 14px;
    font-weight: bold;
}

input, select, textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid #313844;
    background: #101319;
    color: #fff;
    outline: none;
    margin-bottom: 8px;
}

input:focus, select:focus, textarea:focus {
    border-color: #ff4d4f;
}

button, .btn {
    display: inline-block;
    background: #ff4d4f;
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 12px 16px;
    cursor: pointer;
    font-weight: bold;
}

button:hover, .btn:hover {
    opacity: 0.95;
    text-decoration: none;
}

.btn-secondary {
    background: #2c3440;
    color: #fff;
}

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 16px;
    font-size: 14px;
}

.alert-error {
    background: rgba(255, 77, 79, 0.12);
    border: 1px solid rgba(255, 77, 79, 0.35);
    color: #ffb1b2;
}

.alert-success {
    background: rgba(52, 199, 89, 0.12);
    border: 1px solid rgba(52, 199, 89, 0.35);
    color: #9be9b0;
}

.stat {
    font-size: 28px;
    font-weight: bold;
    margin: 10px 0 4px;
}

.muted {
    color: #a8b0bc;
    font-size: 14px;
}

.table-wrap {
    width: 100%;
    overflow-x: auto;
}

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

th, td {
    text-align: left;
    padding: 12px 10px;
    border-bottom: 1px solid #27303b;
    font-size: 14px;
}

.badge {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: bold;
}

.badge-online {
    background: rgba(52, 199, 89, 0.15);
    color: #8df0a8;
}

.badge-offline {
    background: rgba(255, 77, 79, 0.15);
    color: #ffb1b2;
}

.badge-warning {
    background: rgba(255, 184, 0, 0.15);
    color: #ffd76a;
}

.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #181c22;
    border: 1px solid #262c36;
    border-radius: 16px;
    padding: 28px;
}

.center {
    text-align: center;
}

.field-help {
    color: #9eabb9;
    font-size: 13px;
    line-height: 1.45;
    margin-top: -2px;
    margin-bottom: 14px;
}

.section-title {
    margin-bottom: 6px;
}

.section-help {
    color: #a8b0bc;
    font-size: 14px;
    line-height: 1.55;
    margin-bottom: 18px;
}

.checkbox-line {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
    padding: 12px;
    border: 1px solid #27303b;
    border-radius: 10px;
    background: #13171d;
}

.checkbox-line input[type="checkbox"] {
    width: auto;
    margin: 3px 0 0 0;
}

.checkbox-line strong {
    display: block;
    margin-bottom: 4px;
}

.code-box {
    background: #101319;
    border: 1px solid #27303b;
    border-radius: 10px;
    padding: 10px 12px;
    font-family: Consolas, monospace;
    font-size: 13px;
    color: #dce3ec;
    word-break: break-all;
}

.nav-links {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    align-items: center;
}