:root {
  --bg: #0a0f0d;
  --panel: #111917;
  --panel-alt: #182320;
  --border: #28362f;
  --text: #e9efe9;
  --text-dim: #84998c;
  --signal: #ffb020;
  --signal-soft: rgba(255, 176, 32, 0.14);
  --signal-cool: #31d0c4;
  --good: #35d48c;
  --warn: #ffb020;
  --bad: #ff5d6c;
  --radius: 10px;

  --font-display: "Rajdhani", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

/* !important is deliberate: several components set their own unconditional
   `display` (e.g. .station), and since those rules are equal specificity to
   .hidden, source order alone would let them win and silently defeat
   JS-driven hiding. */
.hidden { display: none !important; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-wrap: anywhere;
}

code, .mono { font-family: var(--font-mono); }

h1, h2, h3, .rail-brand-mark, .rail-station-label, .step-title, .stat-value, .telemetry-value {
  font-family: var(--font-display);
  letter-spacing: 0.02em;
}

/* ---------- shell layout ---------- */

.shell { display: flex; min-height: 100vh; }

.rail {
  width: 200px;
  flex: none;
  background: linear-gradient(180deg, #0d1412, #0a0f0d);
  border-right: 1px solid var(--border);
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.rail-brand { padding: 0 8px 20px; border-bottom: 1px solid var(--border); margin-bottom: 10px; }
.rail-brand-mark { display: block; font-size: 17px; font-weight: 700; color: var(--signal); letter-spacing: 0.08em; }
.rail-brand-sub { display: block; font-size: 11px; color: var(--text-dim); margin-top: 2px; }

.rail-station {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
  text-align: left;
}
.rail-station-label { font-size: 14.5px; font-weight: 600; color: var(--text-dim); }
.rail-station-hint { font-size: 11px; color: var(--text-dim); opacity: 0.7; }
.rail-station:hover { background: var(--panel-alt); }
.rail-station.active { background: var(--signal-soft); border-color: rgba(255, 176, 32, 0.35); }
.rail-station.active .rail-station-label { color: var(--signal); }

.main { flex: 1; min-width: 0; padding: 0 28px 32px; }

.telemetry {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 16px 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
.telemetry-reading { display: flex; flex-direction: column; }
.telemetry-value { font-size: 22px; font-weight: 700; color: var(--signal-cool); line-height: 1; }
.telemetry-label { font-size: 10.5px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 3px; }
.telemetry-control { margin-left: auto; flex-direction: row; align-items: center; gap: 8px; }
.telemetry-control input { width: 70px; }

.station { display: block; }

/* ---------- buttons & forms ---------- */

.btn {
  background: var(--signal);
  color: #1a1204;
  border: none;
  border-radius: 7px;
  padding: 8px 16px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
}
.btn:hover { filter: brightness(1.08); }
.btn-small { padding: 6px 12px; font-size: 12px; }
.btn-ghost { background: transparent; color: var(--text-dim); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); border-color: var(--text-dim); }
.btn-danger { background: var(--bad); color: #2a0508; }
.btn-good { background: var(--good); color: #06281a; }

.inline-form { margin-bottom: 16px; padding: 14px; background: var(--panel-alt); border-radius: var(--radius); border: 1px solid var(--border); }
.form-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; align-items: center; }
.form-row:last-child { margin-bottom: 0; }

input, select, textarea {
  background: #0e1513;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 7px 10px;
  font-size: 13px;
  font-family: var(--font-body);
  flex: 1;
  min-width: 120px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--signal-cool); outline-offset: 1px; }
textarea { width: 100%; font-family: var(--font-mono); resize: vertical; }

.toolbar { margin-bottom: 12px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.search-input { width: 100%; }

.gen-count-label { display: flex; align-items: center; gap: 8px; color: var(--text-dim); font-size: 13px; flex: none; }
.gen-count-label input { width: 80px; flex: none; }
.hint { color: var(--text-dim); font-size: 12px; margin: 4px 0 0; }

.multiplier-inline { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); }
.multiplier-inline input { width: 70px; flex: none; }

.bulk-details { margin: 16px 0; color: var(--text-dim); font-size: 12.5px; }
.bulk-details summary { cursor: pointer; font-size: 14px; color: var(--text); font-family: var(--font-display); font-weight: 600; }
.bulk-details > *:not(summary) { margin-top: 12px; }

/* ---------- panels / columns / tables ---------- */

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 20px; }
.panel-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; }
.panel-header h2 { margin: 0; font-size: 18px; }
.header-actions { display: flex; gap: 8px; }

.columns { display: grid; grid-template-columns: 380px 1fr; gap: 20px; align-items: start; }
.columns > .panel { min-width: 0; }
@media (max-width: 900px) { .columns { grid-template-columns: 1fr; } }

table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th { text-align: left; color: var(--text-dim); font-weight: 600; padding: 8px 6px; border-bottom: 1px solid var(--border); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.04em; }
.data-table td { padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: middle; font-family: var(--font-mono); font-size: 12.5px; }
.data-table tr:hover { background: rgba(255, 255, 255, 0.02); }
.data-table tr.selected { background: var(--signal-soft); }
.data-table tr { cursor: default; }
.data-table tr[data-tenant] { cursor: pointer; }

.pager { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; font-size: 12.5px; color: var(--text-dim); }
.pager .pager-btns { display: flex; gap: 6px; }

.empty-state { color: var(--text-dim); font-size: 13px; padding: 24px 0; text-align: center; }

/* ---------- stats / connection / labels ---------- */

.section-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 20px 0 8px;
}
.section-label:first-child { margin-top: 0; }

.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 8px; }
.stats-row .mini-stat { background: var(--panel-alt); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; text-align: center; }
.stats-row .mini-stat .v { font-family: var(--font-mono); font-size: 17px; font-weight: 600; color: var(--signal-cool); }
.stats-row .mini-stat .l { font-size: 10.5px; color: var(--text-dim); margin-top: 2px; text-transform: uppercase; letter-spacing: 0.04em; }

.connection-info { background: var(--panel-alt); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; margin-bottom: 8px; }
.connection-info-row { display: flex; align-items: center; gap: 8px; margin-top: 8px; min-width: 0; }
.connection-info-row:first-child { margin-top: 0; }
.connection-info-key { font-size: 12px; color: var(--text-dim); width: 130px; flex: none; }
.connection-info-row code { background: #0e1513; border: 1px solid var(--border); border-radius: 5px; padding: 4px 9px; font-size: 12.5px; flex: 1; min-width: 0; overflow-x: auto; white-space: nowrap; }
.connection-info-row button { flex: none; }
.connection-info .hint code { background: transparent; border: none; padding: 0; }

.app-tabs { display: flex; gap: 4px; margin-top: 18px; border-bottom: 1px solid var(--border); }
.app-tabs-sub { margin-top: 0; margin-bottom: 4px; }
.app-tab { background: transparent; border: none; border-bottom: 2px solid transparent; color: var(--text-dim); padding: 8px 14px; font-family: var(--font-display); font-weight: 600; font-size: 13.5px; cursor: pointer; }
.app-tab:hover { color: var(--text); }
.app-tab.active { color: var(--signal); border-bottom-color: var(--signal); }
.app-tabs-sub .app-tab { font-size: 12.5px; padding: 6px 12px; }

.app-panel-body { margin-bottom: 8px; }

.fault-panel { margin: 8px 0; }
.fault-panel .data-table { margin-bottom: 12px; }
.fault-panel .inline-form { margin-bottom: 0; }

.activity-feed { list-style: none; margin: 0; padding: 0; max-height: 260px; overflow-y: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel-alt); }
.activity-feed li { padding: 7px 12px; border-bottom: 1px solid var(--border); font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); }
.activity-feed li:last-child { border-bottom: none; }
.activity-feed .t { color: var(--text); }
.activity-feed .norm { color: var(--signal-cool); font-weight: 600; }
.activity-feed .asset-type { color: var(--text-dim); text-transform: uppercase; font-size: 11px; }

/* ---------- signal bars (signature element) ---------- */

.signal-bars { display: inline-flex; align-items: flex-end; gap: 2px; height: 14px; }
.signal-bars .bar { width: 3px; background: var(--border); border-radius: 1px; }
.signal-bars .bar:nth-child(1) { height: 40%; }
.signal-bars .bar:nth-child(2) { height: 65%; }
.signal-bars .bar:nth-child(3) { height: 85%; }
.signal-bars .bar:nth-child(4) { height: 100%; }
.signal-bars.lit-1 .bar:nth-child(1) { background: var(--signal-cool); }
.signal-bars.lit-2 .bar:nth-child(1), .signal-bars.lit-2 .bar:nth-child(2) { background: var(--signal-cool); }
.signal-bars.lit-3 .bar:nth-child(1), .signal-bars.lit-3 .bar:nth-child(2), .signal-bars.lit-3 .bar:nth-child(3) { background: var(--signal-cool); }
.signal-bars.lit-4 .bar { background: var(--signal-cool); }
.signal-bars.down .bar { background: var(--bad); }

.signal-row { display: flex; align-items: center; gap: 8px; }
.signal-count { font-family: var(--font-mono); font-size: 12px; color: var(--text-dim); }

/* ---------- infra cards (Connection page) ---------- */

.infra-row { display: flex; gap: 14px; }
.infra-card { flex: 1; background: var(--panel-alt); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.infra-card .name { font-family: var(--font-display); font-weight: 600; font-size: 14px; margin-bottom: 8px; }
.infra-card .pill { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; padding: 4px 10px; border-radius: 20px; background: rgba(53, 212, 140, 0.14); color: var(--good); }
.infra-card .pill.down { background: rgba(255, 93, 108, 0.14); color: var(--bad); }
.infra-card .pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

/* ---------- onboarding wizard ---------- */

.stepper { display: flex; gap: 6px; margin-bottom: 24px; }
.stepper-item { flex: 1; padding: 10px 4px; border-bottom: 3px solid var(--border); }
.stepper-item .n { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); }
.stepper-item .l { font-family: var(--font-display); font-weight: 600; font-size: 13.5px; color: var(--text-dim); margin-top: 2px; }
.stepper-item.active { border-bottom-color: var(--signal); }
.stepper-item.active .l { color: var(--signal); }
.stepper-item.done { border-bottom-color: var(--signal-cool); }
.stepper-item.done .l { color: var(--text); }

.step-title { margin: 0 0 4px; font-size: 21px; }
.step-hint { color: var(--text-dim); font-size: 13px; margin: 0 0 16px; max-width: 640px; }

.wizard-nav { display: flex; justify-content: space-between; margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border); }

.choice-cards { display: flex; gap: 12px; flex-wrap: wrap; }
.choice-card {
  background: var(--panel-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  min-width: 180px;
  cursor: pointer;
  text-align: left;
}
.choice-card .name { font-family: var(--font-display); font-weight: 700; font-size: 16px; }
.choice-card .desc { font-size: 12px; color: var(--text-dim); margin-top: 4px; }
.choice-card.selected { border-color: var(--signal); background: var(--signal-soft); }
.choice-card.selected .name { color: var(--signal); }

.review-grid { display: grid; gap: 10px; margin-bottom: 20px; max-width: 640px; }
.review-row { display: flex; justify-content: space-between; padding: 10px 14px; background: var(--panel-alt); border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.review-row .k { color: var(--text-dim); }
.review-row .v { font-family: var(--font-mono); }

#createResult { margin-top: 16px; padding: 12px 14px; border-radius: 8px; background: var(--panel-alt); border: 1px solid var(--border); font-size: 13px; }

/* ---------- toast ---------- */

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--panel-alt);
  border: 1px solid var(--signal-cool);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}
.toast.error { border-color: var(--bad); }

/* ---------- login page ---------- */

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  width: 100%;
  max-width: 340px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.login-brand { text-align: center; margin-bottom: 24px; }
.login-brand .rail-brand-mark { font-size: 20px; }
.login-brand .rail-brand-sub { display: block; margin-top: 4px; }
.login-field input { width: 100%; }
.login-submit { width: 100%; margin-top: 4px; }
.login-error { color: var(--bad); text-align: center; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}