:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #6b7686;
  --border: #dde1e7;
  --primary: #0b7a5b;
  --primary-text: #ffffff;
  --danger: #c0392b;
  --ok-bg: #e2f5ec; --ok-fg: #0b6b4d;
  --warn-bg: #fff2d9; --warn-fg: #8a5a00;
  --bad-bg: #fde6e3; --bad-fg: #a1281b;
  --info-bg: #e5eefb; --info-fg: #1f4f96;
  --idle-bg: #eceef2; --idle-fg: #566070;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --surface: #1b212a;
    --text: #e7ebf1;
    --muted: #8f9bab;
    --border: #2b3441;
    --primary: #25a67f;
    --primary-text: #06231a;
    --danger: #ef6b5b;
    --ok-bg: #12392c; --ok-fg: #6fdcb4;
    --warn-bg: #3d2f10; --warn-fg: #f2c463;
    --bad-bg: #431d19; --bad-fg: #f59b8f;
    --info-bg: #182b48; --info-fg: #8fb7f5;
    --idle-bg: #262d38; --idle-fg: #a3aebd;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
[hidden] { display: none !important; }
h1, h2, h3 { margin: 0; line-height: 1.25; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }

.top {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 12px 20px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.top h1 { font-size: 18px; }
.top nav { display: flex; gap: 4px; flex: 1; }
.tab {
  background: none; border: 0; padding: 8px 14px; border-radius: 8px; cursor: pointer;
  color: var(--muted); font: inherit; font-weight: 600;
}
.tab.active { background: var(--idle-bg); color: var(--text); }
.conn { font-size: 12px; color: var(--muted); }
.conn.off { color: var(--danger); }

main { max-width: 1000px; margin: 0 auto; padding: 20px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; margin-bottom: 16px;
}
.card h2 { font-size: 16px; margin-bottom: 12px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row > input[type=text] { flex: 1; min-width: 200px; }

input[type=text], input[type=password] {
  padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); font: inherit;
}
input:focus-visible, button:focus-visible { outline: 2px solid var(--primary); outline-offset: 1px; }

button.btn {
  padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
}
button.btn:hover { background: var(--idle-bg); }
button.btn.primary { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }
button.btn.primary:hover { filter: brightness(1.08); }
button.btn.danger { color: var(--danger); }
button.btn.sm { padding: 4px 10px; font-size: 13px; }
button.btn:disabled { opacity: .6; cursor: default; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
tr:last-child td { border-bottom: 0; }
td.actions { white-space: nowrap; text-align: right; }
td.actions .btn { margin-left: 4px; }
.empty { color: var(--muted); padding: 16px 4px; }
.muted { color: var(--muted); }

.badge { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge.bagli { background: var(--ok-bg); color: var(--ok-fg); }
.badge.qr_bekliyor { background: var(--warn-bg); color: var(--warn-fg); }
.badge.baglanti_koptu { background: var(--bad-bg); color: var(--bad-fg); }
.badge.connecting { background: var(--info-bg); color: var(--info-fg); }
.badge.cikis_yapildi { background: var(--idle-bg); color: var(--idle-fg); }

.chip { display: inline-block; padding: 1px 8px; margin: 1px 4px 1px 0; border-radius: 6px; background: var(--idle-bg); font-size: 12px; }
.idcell { display: flex; align-items: center; gap: 6px; }

.checks { display: flex; flex-direction: column; gap: 4px; margin: 10px 0; padding: 10px; border: 1px solid var(--border); border-radius: 8px; max-height: 180px; overflow: auto; }
.radios { display: flex; gap: 16px; margin: 10px 0; }
.newkey { margin-top: 12px; padding: 12px; border-radius: 8px; background: var(--ok-bg); color: var(--ok-fg); word-break: break-all; }
pre { margin: 8px 0 0; padding: 12px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; overflow: auto; font-size: 12.5px; }
details summary { cursor: pointer; font-weight: 600; }

dialog {
  border: 1px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--text);
  padding: 22px; width: min(92vw, 400px); text-align: center;
}
dialog::backdrop { background: rgba(0, 0, 0, .55); }
dialog h3 { margin-bottom: 4px; }
.qrbox { margin: 14px auto; width: 300px; max-width: 100%; aspect-ratio: 1; display: grid; place-items: center; background: #fff; border-radius: 10px; color: #444; }
.qrbox img { width: 100%; height: 100%; border-radius: 10px; }
.qrsteps { font-size: 13px; color: var(--muted); }

#toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; font-weight: 600;
  opacity: 0; pointer-events: none; transition: opacity .2s; max-width: 90vw; z-index: 10;
}
#toast.show { opacity: 1; }

.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(100%, 360px); }
.login-card form { display: flex; flex-direction: column; gap: 10px; }
.login-card h1 { font-size: 20px; margin-bottom: 14px; }
.err { color: var(--danger); font-size: 14px; min-height: 20px; }

@media (max-width: 720px) {
  main { padding: 12px; }
  .hide-sm { display: none; }
  td.actions { white-space: normal; }
}