/* lndn.space admin — minimalist dark UI */
:root {
  --bg: #0a0e14;
  --bg-card: #111821;
  --bg-card-hover: #15202d;
  --border: #1f2a37;
  --text: #e6eaf0;
  --text-dim: #8b96a5;
  --text-muted: #5d6878;
  --accent: #5b9eff;
  --accent-hover: #4a8ae5;
  --ok: #2dd4a4;
  --warn: #fbbf24;
  --err: #ef4444;
  --shadow: 0 1px 0 0 rgba(255,255,255,0.04), 0 8px 24px rgba(0,0,0,0.4);
}
* { box-sizing: border-box; }
body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* Top nav */
.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  border-bottom: 1px solid var(--border);
  background: rgba(10,14,20,0.85);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
.brand a { color: var(--text); font-weight: 700; font-size: 18px; letter-spacing: -0.5px; }
.brand span { color: var(--accent); }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.15s;
}
.nav-links a:hover { background: var(--bg-card); color: var(--text); }
.nav-links a.active { background: var(--bg-card); color: var(--text); }
.nav-links a.logout { color: var(--text-muted); margin-left: 8px; }
.nav-links a.logout:hover { color: var(--err); }

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px;
}
@media (max-width: 720px) {
  main { padding: 16px; }
  .topnav { padding: 12px 16px; flex-wrap: wrap; gap: 12px; }
  .nav-links { width: 100%; justify-content: flex-start; overflow-x: auto; }
}

h1 { font-size: 28px; font-weight: 700; margin: 0 0 24px; letter-spacing: -0.5px; }
h2 { font-size: 16px; font-weight: 600; margin: 0 0 16px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; }
.page-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-head h1 { margin: 0; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
}

/* Grids */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}
.mt-30 { margin-top: 24px; }

/* Stat card */
.stat .stat-label {
  font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.5px; color: var(--text-muted);
  margin-bottom: 12px;
}
.stat .stat-value {
  font-size: 32px; font-weight: 700;
  letter-spacing: -1px;
}
.stat .stat-sub {
  font-size: 12px; color: var(--text-muted);
  margin-top: 4px;
}

/* Pills */
.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg-card-hover);
  font-size: 12px;
  font-weight: 500;
}
.pill.ok { background: rgba(45,212,164,0.12); color: var(--ok); }
.pill.warn { background: rgba(251,191,36,0.12); color: var(--warn); }
.pill.err { background: rgba(239,68,68,0.12); color: var(--err); }

/* Property table */
.props { width: 100%; }
.props td { padding: 8px 0; font-size: 14px; }
.props td:first-child { color: var(--text-muted); width: 40%; }

/* Meters */
.meter {
  height: 8px; background: var(--bg-card-hover);
  border-radius: 999px; overflow: hidden; margin: 8px 0;
}
.meter.big { height: 12px; margin: 12px 0; }
.meter-fill {
  height: 100%; background: linear-gradient(90deg, var(--accent), #8b5cf6);
  width: 0%; transition: width 0.5s ease;
  border-radius: 999px;
}
.meter-fill.warn { background: linear-gradient(90deg, var(--warn), #f97316); }
.meter-fill.err { background: linear-gradient(90deg, var(--err), #b91c1c); }
.meter-wrap .meter-label {
  font-size: 12px; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.5px;
}
.meter-val { font-size: 14px; font-weight: 600; color: var(--text); }
.meter-val.big { font-size: 24px; font-weight: 700; }
.big-number { font-size: 36px; font-weight: 700; letter-spacing: -1px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.btn:hover { background: var(--bg-card-hover); border-color: #2c3a4d; }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}
.btn.danger { color: var(--err); }
.btn.danger:hover { background: rgba(239,68,68,0.1); border-color: var(--err); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Tables */
.clients-table {
  width: 100%;
  border-collapse: collapse;
}
.clients-table th, .clients-table td {
  padding: 12px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.clients-table th {
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
}
.clients-table tbody tr:last-child td { border-bottom: none; }
.clients-table tbody tr:hover { background: var(--bg-card-hover); }
.clients-table .muted { color: var(--text-muted); text-align: center; padding: 24px; }

/* Modal */
.modal {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  /* центрируем по горизонтали, по вертикали с отступом сверху и скроллом если контент длинный */
  align-items: flex-start;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
  overflow-y: auto;
  padding: 5vh 16px;
}
.modal.open { display: flex; }
.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  max-width: 420px;
  width: 100%;
  margin: auto 0;
  box-shadow: 0 32px 64px rgba(0,0,0,0.5);
}
@media (min-height: 700px) {
  .modal { align-items: center; padding: 32px 16px; }
}
.modal-card.wide { max-width: 720px; }
.modal-card h2 { margin: 0 0 8px; color: var(--text); font-size: 20px; text-transform: none; letter-spacing: 0; }
.modal-card .muted { color: var(--text-muted); margin: 0 0 20px; font-size: 13px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

/* Inputs */
input, label {
  display: block; width: 100%;
}
label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
  margin-top: 12px;
}
input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.15s;
}
input:focus { outline: none; border-color: var(--accent); }

/* QR row */
.qr-row {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
}
@media (max-width: 600px) {
  .qr-row { grid-template-columns: 1fr; }
}
.qr-row img {
  width: 240px; height: 240px;
  background: #fff; border-radius: 12px; padding: 8px;
}
.config-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-family: "JetBrains Mono", "SF Mono", Menlo, monospace;
  font-size: 11px;
  color: var(--text-dim);
  overflow-x: auto;
  white-space: pre;
  max-height: 240px;
  overflow-y: auto;
  margin: 0;
}

/* Login */
.login-wrap {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  max-width: 380px;
  width: 100%;
  box-shadow: 0 24px 48px rgba(0,0,0,0.4);
}
.login-brand {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -1px;
  text-align: center;
}
.login-brand span { color: var(--accent); }
.login-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 32px;
  margin-top: 4px;
}
.login-card button {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 11px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 20px;
}
.login-card button:hover { background: var(--accent-hover); }
.alert {
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: var(--err);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 16px;
}

.muted { color: var(--text-muted); }

/* Mode picker (in modal) */
.mode-picker { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.mode-opt {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  cursor: pointer;
  transition: all 0.15s;
  text-transform: none;
  letter-spacing: normal;
  margin: 0;
  font-size: 13px;
  color: var(--text);
}
.mode-opt:hover { border-color: #2c3a4d; background: var(--bg-card-hover); }
.mode-opt.selected {
  border-color: var(--accent);
  background: rgba(91,158,255,0.08);
}
.mode-opt input[type="radio"] { display: none; }
.mode-title {
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 4px;
}
.mode-desc { font-size: 12px; color: var(--text-muted); line-height: 1.5; }

.btn-tiny {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  margin-left: 6px;
}
.btn-tiny:hover { color: var(--text); border-color: var(--accent); }

/* Online indicator */
.dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  margin-right: 6px;
}
.dot.online { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.dot.offline { background: var(--text-muted); }