:root {
  --bg: #f3f4f8;
  --bg-soft: #eceef4;
  --card: #ffffff;
  --text: #16181d;
  --muted: #6b7280;
  --muted-2: #9aa1ac;
  --border: #e6e8ef;
  --accent: #5b57ee;
  --accent-hover: #4a46d9;
  --accent-soft: #eeedfd;
  --danger: #e5484d;
  --danger-soft: #fdecec;
  --ok: #1a9c6b;
  --ok-soft: #e6f7ef;
  --warn: #b98900;
  --warn-soft: #fdf3d9;
  --shadow-sm: 0 1px 2px rgba(16, 18, 27, 0.04), 0 1px 1px rgba(16, 18, 27, 0.03);
  --shadow-md: 0 8px 24px rgba(16, 18, 27, 0.08), 0 2px 6px rgba(16, 18, 27, 0.04);
  --radius: 14px;
  --radius-sm: 9px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1115;
    --bg-soft: #14161c;
    --card: #181b22;
    --text: #eceef3;
    --muted: #9aa1ac;
    --muted-2: #6b7280;
    --border: #262a34;
    --accent: #7c78ff;
    --accent-hover: #918dff;
    --accent-soft: #23214a;
    --danger: #f26a6e;
    --danger-soft: #3a1f22;
    --ok: #3ecf8e;
    --ok-soft: #123527;
    --warn: #e0b12f;
    --warn-soft: #3a2f0f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);
  }
}
:root[data-theme="dark"] {
  --bg: #0f1115;
  --bg-soft: #14161c;
  --card: #181b22;
  --text: #eceef3;
  --muted: #9aa1ac;
  --muted-2: #6b7280;
  --border: #262a34;
  --accent: #7c78ff;
  --accent-hover: #918dff;
  --accent-soft: #23214a;
  --danger: #f26a6e;
  --danger-soft: #3a1f22;
  --ok: #3ecf8e;
  --ok-soft: #123527;
  --warn: #e0b12f;
  --warn-soft: #3a2f0f;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1040px; margin: 0 auto; padding: 28px 20px 80px; }
h1 { font-size: 22px; margin: 28px 0 14px; letter-spacing: -0.01em; }
h1:first-child { margin-top: 4px; }
h2 { font-size: 15px; margin: 28px 0 10px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
p { line-height: 1.55; }

/* ---------- Nav ---------- */
.nav {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 24px; background: color-mix(in srgb, var(--card) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
  overflow-x: auto;
}
.nav-brand {
  font-weight: 800; letter-spacing: -0.02em; margin-right: 12px;
  display: flex; align-items: center; gap: 8px; font-size: 15px;
  white-space: nowrap; flex-shrink: 0;
}
.nav-brand .dot {
  width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent), #9d7bff);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.nav-links { display: flex; gap: 2px; flex: 1; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 13.5px; font-weight: 500;
  padding: 7px 12px; border-radius: 999px; transition: background .15s, color .15s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); background: var(--bg-soft); }
.nav-links a.active { color: var(--accent); background: var(--accent-soft); }
.nav-logout { margin-left: auto; }

/* ---------- Buttons ---------- */
.btn {
  padding: 8px 14px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--card); color: var(--text); cursor: pointer; font-size: 13.5px;
  font-weight: 500; transition: background .15s, border-color .15s, transform .05s;
}
.btn:hover { background: var(--bg-soft); }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, var(--border)); }
.btn-danger:hover { background: var(--danger-soft); }
.btn-success { background: var(--ok); color: #fff; border-color: var(--ok); }
.btn-success:hover { background: color-mix(in srgb, var(--ok) 85%, black); }

.list-toolbar { display: flex; justify-content: flex-end; margin-bottom: 12px; }

/* ---------- System status gauges ---------- */
.gauges { display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); gap: 14px; margin-bottom: 20px; }
.gauge-card { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.gauge {
  --pct: 0;
  width: 96px; height: 96px; border-radius: 50%; position: relative;
  background: conic-gradient(var(--accent) calc(var(--pct) * 1%), var(--border) 0);
  display: flex; align-items: center; justify-content: center;
}
.gauge::before { content: ""; position: absolute; inset: 9px; border-radius: 50%; background: var(--card); box-shadow: var(--shadow-sm); }
.gauge span { position: relative; z-index: 1; font-weight: 700; font-size: 15px; }
.gauge.gauge-flat { background: var(--card); border: 1px solid var(--border); }
.gauge.gauge-flat::before { content: none; }
.gauge-label { font-size: 11.5px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.btn-ghost { background: transparent; border: none; color: var(--muted); }
.btn-ghost:hover { color: var(--text); background: var(--bg-soft); }
.btn-small { padding: 5px 10px; font-size: 12.5px; border-radius: 7px; }
.btn-copy { padding: 4px 9px; font-size: 12px; border-radius: 7px; }

/* ---------- Cards / layout ---------- */
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; margin-bottom: 16px; box-shadow: var(--shadow-sm);
}
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; margin-bottom: 8px; }
.card-head { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.card-actions { display: flex; gap: 8px; }
.muted { color: var(--muted); font-size: 12.5px; }

.badge { padding: 3px 10px; border-radius: 999px; font-size: 10.5px; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; }
.badge-on { background: var(--ok-soft); color: var(--ok); }
.badge-off { background: var(--danger-soft); color: var(--danger); }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; }
table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; padding: 8px 12px; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; border-bottom: 1px solid var(--border); }
td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-soft); }
.empty { padding: 28px; text-align: center; color: var(--muted-2); }

/* ---------- Forms ---------- */
.form { display: flex; flex-direction: column; gap: 10px; max-width: 340px; }
.form-row { max-width: none; flex-direction: row; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.form-row > div { display: flex; flex-direction: column; gap: 5px; }
label { font-size: 12px; color: var(--muted); font-weight: 500; }
input[type="text"], input[type="password"] {
  padding: 9px 11px; border-radius: 9px; border: 1px solid var(--border); font-size: 13.5px;
  background: var(--bg-soft); color: var(--text); transition: border-color .15s, background .15s;
}
input[type="text"]:focus, input[type="password"]:focus {
  outline: none; border-color: var(--accent); background: var(--card);
}
.checkboxes { display: flex; gap: 14px; align-items: center; padding-bottom: 9px; }
.checkboxes label { display: flex; align-items: center; gap: 5px; color: var(--text); font-size: 13px; font-weight: 400; }
.inline-form { display: flex; gap: 6px; }

.alert { padding: 11px 14px; border-radius: 10px; margin-bottom: 14px; font-size: 13.5px; }
.alert-error { background: var(--danger-soft); color: var(--danger); }
.alert-ok { background: var(--ok-soft); color: var(--ok); }

/* ---------- Login ---------- */
.login-page { min-height: calc(100vh - 8px); display: flex; align-items: center; justify-content: center; }
.login-box {
  width: 100%; max-width: 340px; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow-md);
}
.login-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.login-logo .dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #9d7bff);
  box-shadow: 0 0 0 6px var(--accent-soft);
}
.login-logo span { font-weight: 800; font-size: 18px; letter-spacing: -0.02em; }

/* ---------- Connect / FAQ page ---------- */
.protocol-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.proto-card { display: flex; flex-direction: column; gap: 10px; }
.proto-title { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 15px; }
.proto-emoji { font-size: 20px; }
.kv { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 10px; background: var(--bg-soft); border-radius: 8px; font-size: 13px; }
.kv .k { color: var(--muted); }
.kv .v { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 600; }
.kv-copy { display: flex; align-items: center; gap: 8px; }

details.os-steps { border: 1px solid var(--border); border-radius: 9px; padding: 0; overflow: hidden; }
details.os-steps summary {
  cursor: pointer; padding: 9px 12px; font-size: 13px; font-weight: 600;
  list-style: none; display: flex; align-items: center; justify-content: space-between;
  background: var(--bg-soft);
}
details.os-steps summary::-webkit-details-marker { display: none; }
details.os-steps summary::after { content: "+"; color: var(--muted); font-weight: 400; }
details.os-steps[open] summary::after { content: "−"; }
details.os-steps ol { margin: 0; padding: 12px 12px 12px 30px; font-size: 13px; line-height: 1.6; color: var(--text); }
details.os-steps ol li { margin-bottom: 4px; }
details.os-steps > .config-box { margin: 10px; width: calc(100% - 20px); }

select.user-select {
  padding: 9px 11px; border-radius: 9px; border: 1px solid var(--border); font-size: 13.5px;
  background: var(--bg-soft); color: var(--text); max-width: 320px;
}

.settings-note { font-size: 12.5px; color: var(--muted); margin-top: -4px; }

.theme-toggle { font-size: 15px; }

.config-box {
  -webkit-appearance: none; appearance: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px; line-height: 1.6; padding: 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg-soft) !important;
  color: var(--text) !important; resize: vertical; white-space: pre;
  overflow-x: auto; box-sizing: border-box; width: 100%;
  -webkit-text-fill-color: var(--text); opacity: 1;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
.config-box::-webkit-scrollbar { height: 8px; width: 8px; }
.config-box::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.config-box::-webkit-scrollbar-track { background: transparent; }
.config-box:focus { outline: none; border-color: var(--accent); }

.qr-wrap { display: flex; justify-content: center; padding: 4px 0 10px; }
.qr-wrap > div {
  border-radius: 10px; background: #fff; padding: 10px; box-shadow: var(--shadow-sm);
  line-height: 0;
}
.qr-caption { font-size: 12px; color: var(--muted); text-align: center; margin: 0 0 12px; }
.config-actions { display: flex; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }

/* ---------- Connect modal ---------- */
.connect-modal {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
  background: var(--bg); color: var(--text); box-shadow: var(--shadow-lg, 0 20px 50px rgba(0,0,0,.35));
  width: min(420px, calc(100vw - 32px)); max-height: calc(100vh - 64px); overflow-y: auto;
}
.connect-modal::backdrop { background: rgba(0,0,0,.55); }
.connect-modal .card { margin-bottom: 0; border: none; background: transparent; padding: 0; box-shadow: none; }
.connect-modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.connect-modal-head h2 { margin: 0; font-size: 16px; }