:root {
  --bg: #0a0f1c;
  --bg-2: #0d1526;
  --panel: #131d33;
  --panel-2: #1a2740;
  --border: #253253;
  --border-soft: #1c2841;
  --text: #eaeff7;
  --muted: #8b98b8;
  --muted-2: #6b7a9c;
  --accent: #38bdf8;
  --accent-2: #7dd3fc;
  --accent-ink: #062334;
  --danger: #f87171;
  --ok: #4ade80;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,.4);
  --shadow-glow: 0 0 0 3px rgba(56,189,248,.16);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}
* { box-sizing: border-box; }
html { color-scheme: dark; font-size: 17.5px; }
body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  background-image:
    radial-gradient(60% 50% at 100% 0%, rgba(56,189,248,.10), transparent 65%),
    radial-gradient(45% 40% at 0% 100%, rgba(125,211,252,.05), transparent 65%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'tnum' 1;
  scrollbar-color: var(--border) transparent;
  scrollbar-width: thin;
}
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--muted-2); }

#topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10,15,28,.82);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  box-shadow: var(--shadow-sm);
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.85rem;
  border-bottom: 1px solid var(--border-soft);
}
header h1 {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0;
  color: var(--text);
}
header h1 .tm, .card h2 .tm {
  font-size: .78em;
  font-weight: 500;
  color: var(--muted);
  margin-left: .12em;
}
nav {
  display: flex;
  gap: .3rem;
  padding: .6rem 1.6rem;
  border-bottom: 1px solid var(--border-soft);
}
nav button {
  position: relative;
  background: none;
  border: none;
  color: var(--muted);
  padding: .55rem 1.15rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 500;
  transition: background .15s ease, color .15s ease;
}
nav button:hover { color: var(--text); background: rgba(255,255,255,.04); }
nav button.active { color: var(--text); background: rgba(56,189,248,.14); font-weight: 600; }
nav button.active::after {
  content: '';
  position: absolute;
  left: .9rem;
  right: .9rem;
  bottom: -.56rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.user-menu { position: relative; }
.user-menu-trigger {
  display: flex;
  align-items: center;
  gap: .6rem;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .35rem .55rem .35rem .9rem;
  transition: background .15s ease, border-color .15s ease;
}
.user-menu-trigger:hover { background: var(--panel-2); border-color: var(--muted-2); opacity: 1; }
.user-menu-trigger .badge { pointer-events: none; }
.burger { display: inline-flex; flex-direction: column; justify-content: center; gap: 3px; padding: .25rem; }
.burger span { width: 15px; height: 2px; border-radius: 1px; background: var(--muted); transition: background .15s ease; }
.user-menu-trigger:hover .burger span { background: var(--text); }
.user-menu-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  min-width: 200px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: .45rem;
  display: flex;
  flex-direction: column;
  gap: .15rem;
  z-index: 20;
  opacity: 0;
  transform: translateY(-6px) scale(.98);
  pointer-events: none;
  transition: opacity .15s ease, transform .15s ease;
}
.user-menu-dropdown.open { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.user-menu-dropdown .menu-item {
  background: transparent;
  border: none;
  text-align: left;
  padding: .65rem .8rem;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .95rem;
  font-weight: 500;
  width: 100%;
}
.user-menu-dropdown .menu-item:hover { background: var(--panel-2); opacity: 1; }

main { padding: 2.1rem 1.85rem; max-width: 1220px; margin: 0 auto; width: 100%; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.6rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-header h2 {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
}
.page-header-actions {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: wrap;
}

.table-card {
  background: var(--panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.table-card table { margin-top: 0; }

table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
thead { background: linear-gradient(180deg, var(--panel-2), rgba(26,39,64,.7)); }
th, td { text-align: left; padding: .95rem 1.15rem; border-bottom: 1px solid var(--border-soft); font-size: .95rem; }
th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background .12s ease; }
tbody tr:hover { background: rgba(255,255,255,.025); }

input, button, select {
  font-family: inherit;
  font-size: .95rem;
  padding: .65rem .9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
}
input::placeholder { color: var(--muted-2); }
input { accent-color: var(--accent); }
input:focus, button:focus-visible, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--shadow-glow);
}
input[type="checkbox"] { width: 18px; height: 18px; padding: 0; cursor: pointer; }

button {
  cursor: pointer;
  font-weight: 600;
  letter-spacing: .01em;
  transition: background .15s ease, border-color .15s ease, opacity .15s ease, transform .1s ease, box-shadow .15s ease;
}
button:hover { opacity: .94; transform: translateY(-1px); }
button:active { transform: translateY(0); }
button:disabled { opacity: .45; cursor: not-allowed; transform: none; }

button.primary {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: var(--accent-ink);
  border: none;
  box-shadow: 0 4px 14px rgba(56,189,248,.28);
}
button.primary:hover { box-shadow: 0 6px 18px rgba(56,189,248,.4); opacity: 1; }

button.secondary { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); font-weight: 500; }
button.secondary:hover { background: var(--panel); border-color: var(--muted-2); opacity: 1; }

button.danger { background: transparent; border: 1px solid transparent; color: var(--danger); padding: .45rem .65rem; font-weight: 500; }
button.danger:hover { background: rgba(248,113,113,.12); border-color: rgba(248,113,113,.25); opacity: 1; transform: none; }

.row { display: flex; gap: .6rem; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; }
.toolbar { margin-bottom: 1rem; }
.search-input { flex: 1; max-width: 420px; }

.pagination { justify-content: center; margin-top: 1.1rem; }
.pagination span { color: var(--muted); font-size: .85rem; }

.badge { padding: .25rem .65rem; border-radius: 999px; font-size: .78rem; font-weight: 600; letter-spacing: .03em; border: 1px solid transparent; }
.badge.ok { background: rgba(74,222,128,.12); color: var(--ok); border-color: rgba(74,222,128,.25); }
.badge.off { background: rgba(139,153,183,.12); color: var(--muted); border-color: rgba(139,153,183,.2); }
.badge.danger { background: rgba(248,113,113,.12); color: var(--danger); border-color: rgba(248,113,113,.25); }

.page-shell { min-height: 100vh; display: flex; flex-direction: column; }
.center { flex: 1; display: flex; align-items: center; justify-content: center; padding: 2rem 1rem; }
.card {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 2.75rem 2.5rem 2.4rem;
  width: 390px;
  max-width: 100%;
  box-shadow: var(--shadow-md);
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.card h2 { margin-top: 0; font-size: 1.3rem; font-weight: 800; letter-spacing: -.01em; }
.card label { display: block; margin: 1rem 0 .4rem; font-size: .82rem; font-weight: 500; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.card input { width: 100%; }
.error { color: var(--danger); font-size: .9rem; margin-top: .75rem; min-height: 1em; }

dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 2rem;
  min-width: 360px;
  box-shadow: var(--shadow-md);
}
dialog[open] { animation: dialogPop .16s cubic-bezier(.2,.9,.3,1.1); }
@keyframes dialogPop {
  from { opacity: 0; transform: scale(.96) translateY(4px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
dialog h3 { margin: 0 0 1.2rem; font-size: 1.2rem; font-weight: 700; }
dialog::backdrop { background: rgba(4,8,16,.7); backdrop-filter: blur(3px); -webkit-backdrop-filter: blur(3px); }
.dialog-msg { min-height: 1.1em; font-size: .9rem; margin-top: .65rem; color: var(--ok); }
.dialog-msg.error { color: var(--danger); }

.settings-form .row { justify-content: space-between; max-width: 660px; }
.settings-form label { flex: 1; color: var(--text); font-size: .95rem; }
.settings-form input { flex: 1; }

.app-footer {
  margin-top: 2.5rem;
  padding: 1.5rem 1.85rem 2rem;
  text-align: center;
  border-top: 1px solid var(--border-soft);
}
.app-footer p { margin: 0; color: var(--muted-2); font-size: .82rem; letter-spacing: .01em; }
.app-footer .tm { font-size: .85em; }

/* ---- Mobile responsiveness ---- */
@media (max-width: 640px) {
  html { font-size: 16.5px; }
  main { padding: 1.1rem .9rem; }
  header { padding: .85rem 1rem; }
  header h1 { font-size: 1.1rem; }
  nav {
    padding: .45rem .6rem;
    gap: .15rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  nav::-webkit-scrollbar { display: none; }
  nav button { padding: .55rem .85rem; font-size: .88rem; white-space: nowrap; flex: 0 0 auto; }
  .page-header { flex-direction: column; align-items: flex-start; gap: .7rem; margin-bottom: 1.2rem; }
  .page-header-actions { width: 100%; }
  .page-header-actions button { flex: 1; }
  .row { gap: .5rem; }
  .toolbar .search-input { max-width: none; width: 100%; }
  .table-card { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius-sm); }
  table { min-width: 600px; }
  th, td { padding: .7rem .8rem; font-size: .9rem; }
  /* 16px inputs prevent iOS Safari from auto-zooming on focus */
  input, button, select { font-size: 16px; }
  nav button, .badge, th { font-size: .85rem; }
  .card { padding: 2.1rem 1.4rem 1.85rem; width: 100%; }
  dialog { min-width: unset; width: calc(100vw - 2rem); padding: 1.6rem; box-sizing: border-box; }
  .settings-form .row { flex-direction: column; align-items: stretch; max-width: none; }
  .user-menu-dropdown { min-width: 180px; }
  .app-footer { padding: 1.25rem 1rem 1.5rem; }
  body { background-attachment: scroll; }
}