:root {
    --bg: #f5f7fa;
    --fg: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --primary: #2563eb;
    --primary-fg: #fff;
    --danger: #dc2626;
    --ok: #16a34a;
    --warn: #d97706;
    --neutral: #6b7280;
    --error: #dc2626;
    --card-bg: #fff;
    --radius: 6px;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    background: var(--bg);
    color: var(--fg);
    font-size: 14px;
    line-height: 1.5;
}

.topbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.topbar .brand {
    font-weight: 700;
    text-decoration: none;
    color: var(--fg);
    font-size: 16px;
}
.topbar nav { flex: 1; display: flex; gap: 16px; }
.topbar nav a { text-decoration: none; color: var(--fg); }
.topbar nav a:hover { color: var(--primary); }
.logout-form { display: flex; align-items: center; gap: 8px; }
.logout-form span { color: var(--muted); font-size: 13px; }

.container {
    max-width: 1100px;
    margin: 24px auto;
    padding: 0 24px;
}

.footer { text-align: center; color: var(--muted); padding: 24px; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 16px;
}
.card-narrow { max-width: 420px; margin: 48px auto; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; color: var(--muted); }

.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 12px;
}
.alert-error { background: #fee2e2; color: var(--error); }

.form label { display: block; margin: 12px 0; }
.form label span { display: block; font-weight: 500; margin-bottom: 4px; }
.form input[type="text"],
.form input[type="email"],
.form input[type="password"],
.form input[type="url"],
.card-narrow label input {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
}
.form small { display: block; color: var(--muted); margin-top: 4px; font-size: 12px; }
.form fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    margin: 12px 0;
}
.form fieldset legend { padding: 0 6px; font-weight: 500; }
.form .radio { display: block; margin: 6px 0; }
.form .radio input { margin-right: 6px; }

.btn {
    display: inline-block;
    padding: 8px 16px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--fg);
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
}
.btn:hover { background: #f9fafb; }
.btn-primary { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    background: #e5e7eb;
    color: var(--fg);
    font-size: 12px;
    font-weight: 500;
}
.badge-ok { background: #dcfce7; color: var(--ok); }
.badge-warn { background: #fef3c7; color: var(--warn); }
.badge-error { background: #fee2e2; color: var(--error); }
.badge-neutral { background: #f3f4f6; color: var(--neutral); }

.dashboard-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat-label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-value { font-size: 22px; font-weight: 600; margin-top: 4px; }

.instances-table {
    width: 100%;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    border-collapse: separate;
    border-spacing: 0;
}
.instances-table th, .instances-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.instances-table th { background: #f9fafb; font-weight: 600; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.instances-table tr:last-child td { border-bottom: 0; }
.instances-table a { color: var(--primary); text-decoration: none; }
.instances-table .ipv6 { font-family: ui-monospace, "SF Mono", monospace; font-size: 12px; color: var(--muted); }
.instances-table .empty { text-align: center; color: var(--muted); padding: 24px; }

.instance-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
@media (max-width: 720px) { .instance-grid { grid-template-columns: 1fr; } }

.instance-grid dl { display: grid; grid-template-columns: 140px 1fr; gap: 6px 16px; margin: 0; }
.instance-grid dt { color: var(--muted); font-size: 13px; }
.instance-grid dd { margin: 0; word-break: break-all; }
.instance-grid .ipv6 { font-family: ui-monospace, monospace; font-size: 12px; }

.qr-container { display: flex; align-items: center; justify-content: center; min-height: 260px; }
.qr-img { width: 240px; height: 240px; image-rendering: pixelated; }
.qr-authorized { font-size: 18px; color: var(--ok); font-weight: 600; }
.qr-loading { color: var(--muted); }
.pairing-code { font-family: ui-monospace, monospace; font-size: 28px; text-align: center; letter-spacing: 0.2em; }

.actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.actions form { display: inline-flex; gap: 8px; align-items: center; }
.inline { display: inline-flex; gap: 4px; align-items: center; font-size: 12px; color: var(--muted); }
.muted { color: var(--muted); }
.filter-form { display: flex; gap: 12px; align-items: end; margin-bottom: 12px; flex-wrap: wrap; }
.filter-form label { display: flex; flex-direction: column; gap: 4px; }
.filter-form label span { font-size: 12px; color: var(--muted); }
.filter-form select { padding: 6px 8px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13px; }
.pagination { display: flex; gap: 6px; margin-top: 12px; }
.pagination a, .pagination strong { padding: 4px 10px; border: 1px solid var(--border); border-radius: var(--radius); text-decoration: none; color: var(--fg); font-size: 13px; }
.pagination strong { background: var(--primary); color: #fff; border-color: var(--primary); }
.inline-form { display: inline; margin: 0; }
.btn-link { background: none; border: none; padding: 0; color: var(--primary); cursor: pointer; font: inherit; }
.actions-cell { display: flex; gap: 12px; align-items: center; }
.webhook-queue-bar { display: flex; gap: 10px; align-items: center; padding: 10px 14px;
    background: #f9fafb; border: 1px solid var(--border); border-radius: var(--radius);
    margin-bottom: 12px; flex-wrap: wrap; }
.webhook-queue-bar .alert { margin: 0 0 0 auto; padding: 4px 10px; font-size: 13px; }
.alert-info { background: #dbeafe; color: #1e40af; }

/* Chat */
.chat-wrap { display: grid; grid-template-columns: 360px 1fr; gap: 16px; align-items: start; }
@media (max-width: 800px) { .chat-wrap { grid-template-columns: 1fr; } }
.chat-side { max-height: 70vh; overflow: auto; }
.chat-tools { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; font-size: 13px; }
.chat-list { list-style: none; padding: 0; margin: 0; }
.chat-list li { border-bottom: 1px solid var(--border); padding: 8px 0; font-size: 13px; }
.chat-list li:last-child { border-bottom: 0; }
.msg-meta { color: var(--muted); font-size: 11px; font-family: ui-monospace, monospace; }
.msg-body { margin-top: 4px; word-break: break-word; }
.chat-main fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 12px; margin: 12px 0; }
.chat-main fieldset legend { font-size: 12px; color: var(--muted); padding: 0 6px; }
.chat-main .inline-radio { display: inline-flex; gap: 4px; margin-right: 16px; }
.chat-main label { display: block; margin: 8px 0; }
.chat-main label span { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.chat-main input[type="text"], .chat-main input[type="url"], .chat-main input[type="number"], .chat-main textarea {
    width: 100%; padding: 6px 8px; border: 1px solid var(--border); border-radius: var(--radius); font-family: inherit; font-size: 13px;
}
#send-result { margin-top: 12px; }
#send-result pre { background: #f3f4f6; padding: 10px; border-radius: var(--radius); font-size: 12px; overflow: auto; }
#check-result { margin-left: 8px; font-size: 12px; }

.instance-subnav { display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
    margin: 8px 0 20px; padding: 12px 16px; background: #f9fafb;
    border: 1px solid var(--border); border-radius: var(--radius); }
.btn-lg { font-size: 15px; padding: 10px 18px; }
.instance-subnav code { font-family: ui-monospace, monospace; font-size: 12px; }