:root {
  --bg: #0f1116;
  --panel: #181b22;
  --panel-2: #1f232c;
  --fg: #e6e8ee;
  --muted: #8892a1;
  --accent: #4cc9f0;
  --ok: #2ecc71;
  --warn: #f1c40f;
  --err: #e74c3c;
  --border: #2a2f3a;
  --radius: 8px;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--fg); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* topbar ------------------------------------------------------------ */
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.topbar .brand { font-weight: 700; font-size: 18px; letter-spacing: .5px; }
.topbar .brand .brand-sub { font-weight: 400; font-size: 12px; opacity: .6; margin-left: 6px; letter-spacing: 0; }
.topbar nav { display: flex; gap: 16px; flex: 1; }
.topbar nav a { color: var(--fg); padding: 6px 10px; border-radius: 6px; }
.topbar nav a.active, .topbar nav a:hover { background: var(--panel-2); text-decoration: none; }
.topbar .logout-form button {
  background: transparent; color: var(--muted); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 6px; cursor: pointer;
}
.topbar .logout-form button:hover { color: var(--fg); border-color: var(--fg); }

/* content ----------------------------------------------------------- */
.content { max-width: 1100px; margin: 24px auto; padding: 0 20px; }
h1 { margin-top: 0; }
h2 { margin-top: 24px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.panel { background: var(--panel); padding: 16px 18px; margin: 16px 0;
         border: 1px solid var(--border); border-radius: var(--radius); }

.muted { color: var(--muted); }
.mono  { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; }

/* tiles (dashboard) ------------------------------------------------- */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.tile { background: var(--panel); border: 1px solid var(--border); padding: 16px; border-radius: var(--radius); }
.tile .t-title { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
.tile .t-val   { font-size: 20px; font-weight: 600; margin-top: 6px; }
.tile.ok   { border-left: 4px solid var(--ok);   }
.tile.warn { border-left: 4px solid var(--warn); }
.tile.err  { border-left: 4px solid var(--err);  }

/* tables ------------------------------------------------------------ */
table.data { width: 100%; border-collapse: collapse; margin-top: 12px; }
table.data th, table.data td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
table.data th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
.row-actions { text-align: right; white-space: nowrap; }
.row-actions button { margin-left: 6px; }

/* forms ------------------------------------------------------------- */
button, input[type=submit] {
  background: var(--accent); color: #051019; border: 0; padding: 8px 14px; border-radius: 6px;
  font-weight: 600; cursor: pointer;
}
button:hover { filter: brightness(1.1); }
button.btn-deactivate, button.btn-room-delete {
  background: var(--err); color: #fff;
}
button.btn-reset { background: var(--warn); color: #222; }

input[type=text], input[type=password], input[type=email], textarea {
  background: var(--panel-2); color: var(--fg); border: 1px solid var(--border);
  padding: 8px 10px; border-radius: 6px; width: 100%;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

form.inline { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
form.inline input { flex: 1; min-width: 180px; }
form.vform label { display: block; margin-bottom: 12px; }
form.vform label.chk { display: flex; align-items: center; gap: 8px; }
form.vform .actions { margin-top: 20px; display: flex; gap: 12px; align-items: center; }

.alert { padding: 10px 12px; border-radius: 6px; margin: 10px 0; }
.alert.err { background: #3a1b1b; color: #f2a4a4; border: 1px solid #5f2a2a; }

/* login ------------------------------------------------------------- */
.login-body { background: radial-gradient(circle at top, #1a1e28, var(--bg)); min-height: 100vh; }
.login-card {
  max-width: 380px; margin: 10vh auto; background: var(--panel); padding: 28px 30px;
  border: 1px solid var(--border); border-radius: 10px;
}
.login-card h1 { margin-top: 0; }
.login-card .sub { color: var(--muted); margin-bottom: 20px; }
.login-card label { display: block; margin-bottom: 12px; }
.login-card button { width: 100%; padding: 10px; margin-top: 4px; }
.login-card .err { color: var(--err); min-height: 1em; }

pre.mono { background: var(--panel-2); padding: 10px; border-radius: 6px; overflow: auto; }

/* ====================================================================
 * Settings page — categorised accordion form.
 * ==================================================================== */

.settings-form { max-width: 880px; margin: 0 auto; }
.settings-intro { margin: 0 0 16px; }

/* ---- accordion section card ---- */
.settings-section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
}
.settings-section > summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  user-select: none;
  background: transparent;
}
.settings-section > summary:hover { background: var(--panel-2); }
.settings-section > summary::-webkit-details-marker { display: none; }
.settings-section .section-title {
  font-weight: 600;
  font-size: 16px;
}
.settings-section .section-subtitle {
  color: var(--muted);
  font-size: 13px;
  flex: 1;
}
.settings-section .section-chevron {
  font-size: 22px;
  color: var(--muted);
  transition: transform .15s ease;
  margin-left: auto;
}
.settings-section[open] .section-chevron { transform: rotate(90deg); }
.settings-section .section-body {
  padding: 4px 18px 18px;
  border-top: 1px solid var(--border);
}

/* ---- per-field row ---- */
.setting {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.setting:last-child { border-bottom: 0; }
.setting-label {
  display: block;
  font-weight: 600;
  color: var(--fg);
  font-size: 14px;
  margin-bottom: 4px;
}
.setting-desc {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  margin: 4px 0;
}
.setting-example {
  color: #6b7280;
  font-size: 12px;
  font-style: italic;
  margin: 4px 0 8px;
}
.setting-example code {
  background: var(--panel-2);
  padding: 1px 5px;
  border-radius: 3px;
  font-style: normal;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 11.5px;
  color: var(--fg);
}
.setting-error {
  display: block;
  color: var(--err);
  font-size: 12px;
  margin-top: 4px;
  min-height: 1em;
}
.setting.has-error input,
.setting.has-error select,
.setting.has-error textarea {
  border-color: var(--err);
  outline: 2px solid rgba(231, 76, 60, .25);
  outline-offset: -1px;
}

.setting .input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 320px;
}
.setting .setting-unit {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

.setting input[type=number],
.setting input[type=text],
.setting select,
.setting textarea {
  background: var(--panel-2);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 8px 10px;
  border-radius: 6px;
  width: 100%;
  font-size: 14px;
}
.setting input[type=number] { max-width: 200px; }
.setting select { max-width: 240px; }
.setting textarea {
  min-height: 90px;
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 12.5px;
}
.setting input:focus,
.setting select:focus,
.setting textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

/* ---- bool toggle (sliding switch) ---- */
.setting .toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.setting .toggle input[type=checkbox] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.setting .toggle .toggle-track {
  width: 38px;
  height: 22px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
  transition: background .15s ease;
}
.setting .toggle .toggle-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 16px; height: 16px;
  background: var(--muted);
  border-radius: 50%;
  transition: transform .15s ease, background .15s ease;
}
.setting .toggle input:checked + .toggle-track {
  background: var(--accent);
  border-color: var(--accent);
}
.setting .toggle input:checked + .toggle-track .toggle-thumb {
  background: #051019;
  transform: translateX(16px);
}
.setting .toggle input:focus-visible + .toggle-track {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.setting .toggle .toggle-state {
  font-size: 13px;
  color: var(--muted);
  min-width: 28px;
}

/* ---- sticky save bar ---- */
.settings-savebar {
  position: sticky;
  bottom: 0;
  background: rgba(15, 17, 22, .92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  margin: 16px -8px 0;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 14px;
  align-items: center;
  z-index: 10;
}
.settings-savebar button[disabled] {
  opacity: .45;
  cursor: not-allowed;
  filter: none;
}

/* ---- mobile ---- */
@media (max-width: 640px) {
  .settings-form { padding: 0 4px 80px; }
  .settings-section > summary { padding: 12px 14px; gap: 8px; flex-wrap: wrap; }
  .settings-section .section-subtitle { flex-basis: 100%; order: 3; }
  .settings-section .section-chevron { order: 2; }
  .settings-section .section-body { padding: 4px 14px 14px; }
  .setting input[type=number],
  .setting select { max-width: 100%; }
  .setting .input-row { max-width: 100%; }
}