:root {
  color-scheme: dark;

  --void: #101318;
  --panel: #181c22;
  --panel-raised: #1f242c;
  --readout-bg: #0b0d10;

  --bezel: #2c323c;
  --bezel-hi: rgba(255, 255, 255, 0.06);
  --bezel-lo: rgba(0, 0, 0, 0.6);

  --ink: #eae6da;
  --ink-dim: #9aa3ad;
  --ink-faint: #616a75;

  --ok: #3ddc76;
  --ok-glow: rgba(61, 220, 118, 0.55);
  --ok-dim: #1d6b3c;

  --bad: #ff5c5c;
  --bad-glow: rgba(255, 92, 92, 0.5);
  --bad-dim: #7a2626;

  --warn: #ffaa00;
  --warn-glow: rgba(255, 170, 0, 0.6);
  --warn-dim: #7a5310;

  --font-display: "Noto Sans Georgian", "Noto Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --radius: 3px;
}

* { box-sizing: border-box; }

html, body { background: var(--void); }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.5;
  position: relative;
  background:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(255, 170, 0, 0.07), transparent 60%),
    var(--void);
}

/* ---------------------------------------------------------------- */
/* rack frame: fixed side rails with mounting holes, wide viewports   */
/* ---------------------------------------------------------------- */

body::before, body::after {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  width: 28px;
  z-index: 5;
  pointer-events: none;
  display: none;
  background:
    radial-gradient(circle 3.5px at 14px 22px, #05060d 0 60%, transparent 62%) 0 0/28px 44px repeat-y,
    linear-gradient(90deg, #0a0b0d, #181c21 45%, #0a0b0d);
  box-shadow: inset 0 0 0 1px var(--bezel);
}

body::before { left: 0; }
body::after { right: 0; }

@media (min-width: 900px) {
  body { padding-left: 28px; padding-right: 28px; }
  body::before, body::after { display: block; }
}

/* hazard stripe: signature graphic device, used once at page open */

.hazard-strip {
  height: 7px;
  background: repeating-linear-gradient(135deg, var(--warn) 0 12px, #0a0b0d 12px 24px);
}

a { color: var(--warn); }

::selection { background: var(--warn-dim); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--warn);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------------------------------------------------------------- */
/* rack shell                                                        */
/* ---------------------------------------------------------------- */

.rack-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background:
    repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 3px),
    linear-gradient(165deg, var(--panel-raised) 0%, var(--panel) 55%, #14171c 100%);
  border-bottom: 1px solid var(--bezel);
  box-shadow: inset 0 -1px 0 var(--bezel-lo), inset 0 1px 0 var(--bezel-hi);
  flex-wrap: wrap;
}

.nameplate {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.65), 0 -1px 0 rgba(255, 255, 255, 0.05);
}

.rack-nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.rack-nav a {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid var(--bezel);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: inset 0 1px 0 var(--bezel-hi);
  transition: border-color 150ms ease, color 150ms ease;
}

.rack-nav a:hover { color: var(--ink); border-color: var(--ink-faint); }

.rack-nav a[aria-current="page"] {
  color: var(--void);
  background: var(--warn);
  border-color: var(--warn);
}

.rack-body {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 18px 72px;
}

/* ---------------------------------------------------------------- */
/* hero status                                                        */
/* ---------------------------------------------------------------- */

.hero-status {
  position: relative;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 26px 28px 30px;
  margin-bottom: 22px;
  background:
    repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 3px),
    linear-gradient(165deg, #1c2027 0%, var(--panel) 50%, #14171c 100%);
  border: 1px solid var(--bezel);
  border-radius: var(--radius);
  box-shadow:
    inset 0 1px 0 var(--bezel-hi),
    inset 0 -1px 0 var(--bezel-lo),
    0 1px 0 rgba(0, 0, 0, 0.5),
    0 12px 26px -18px rgba(0, 0, 0, 0.75);
  overflow: hidden;
  flex-wrap: wrap;
}

.hero-status::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: repeating-linear-gradient(135deg, var(--warn) 0 10px, #0a0b0d 10px 20px);
  opacity: 0.85;
}

.lamp-big {
  position: relative;
  width: 58px;
  height: 58px;
  flex: none;
  border-radius: 50%;
  background: var(--readout-bg);
  border: 3px solid var(--bezel);
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.7);
}

.lamp-big::before {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  transition: background 200ms ease, box-shadow 200ms ease;
}

.lamp-big-ok::before {
  background: radial-gradient(circle at 34% 28%, #eafff0 0%, var(--ok) 45%, var(--ok-dim) 100%);
  box-shadow: 0 0 26px 6px var(--ok-glow);
}

.lamp-big-bad::before {
  background: radial-gradient(circle at 34% 28%, #ffecec 0%, var(--bad) 45%, var(--bad-dim) 100%);
  box-shadow: 0 0 26px 6px var(--bad-glow);
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 200px;
}

.hero-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.hero-status-text {
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  transition: color 200ms ease, text-shadow 200ms ease;
}

.hero-status-text.is-ok { color: var(--ok); text-shadow: 0 0 18px var(--ok-glow); }
.hero-status-text.is-bad { color: var(--bad); text-shadow: 0 0 18px var(--bad-glow); }

.hero-port { font-size: 13px; color: var(--ink-dim); }

.hero-settings {
  margin-left: auto;
  display: flex;
  align-items: flex-end;
  gap: 14px;
  flex-wrap: wrap;
}

.digit-display {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--warn);
  background: var(--readout-bg);
  border: 1px solid var(--bezel);
  border-radius: var(--radius);
  padding: 4px 16px;
  min-width: 110px;
  text-align: center;
  text-shadow: 0 0 14px var(--warn-glow);
  box-shadow: inset 0 2px 6px var(--bezel-lo);
}

/* ---------------------------------------------------------------- */
/* flash messages                                                     */
/* ---------------------------------------------------------------- */

.flashes { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }

.flash {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--bezel);
  border-radius: var(--radius);
  font-size: 13px;
  background: var(--panel);
}

.flash::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.flash-success { color: var(--ok); }
.flash-success::before { background: var(--ok); box-shadow: 0 0 6px var(--ok-glow); }
.flash-error { color: var(--bad); }
.flash-error::before { background: var(--bad); box-shadow: 0 0 6px var(--bad-glow); }

/* ---------------------------------------------------------------- */
/* panel modules                                                      */
/* ---------------------------------------------------------------- */

.panel {
  background:
    repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.015) 0px, rgba(255, 255, 255, 0.015) 1px, transparent 1px, transparent 3px),
    linear-gradient(165deg, #1c2027 0%, var(--panel) 50%, #14171c 100%);
  border: 1px solid var(--bezel);
  border-radius: var(--radius);
  box-shadow:
    inset 0 1px 0 var(--bezel-hi),
    inset 0 -1px 0 var(--bezel-lo),
    0 1px 0 rgba(0, 0, 0, 0.5),
    0 12px 26px -18px rgba(0, 0, 0, 0.75);
  margin-bottom: 22px;
  overflow: hidden;
}

.panel-plate {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 18px;
  background:
    repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 3px),
    linear-gradient(180deg, var(--panel-raised), var(--panel));
  border-bottom: 1px solid var(--bezel);
  flex-wrap: wrap;
}

.panel-plate h2 {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink);
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.65), 0 -1px 0 rgba(255, 255, 255, 0.05);
}

.panel-body { padding: 16px 18px 18px; }

.muted { color: var(--ink-dim); font-size: 12.5px; }

/* live activity lamp, pulses once per poll tick */

.live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-faint);
  flex: none;
  transition: background 80ms linear, box-shadow 80ms linear;
}

.live-dot.tick {
  background: var(--warn);
  box-shadow: 0 0 6px var(--warn-glow);
}

/* status lamp (serial connection) */

.status-lamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-lamp::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-faint);
  box-shadow: inset 0 0 0 1px var(--bezel-lo);
}

.status-lamp.lamp-ok { color: var(--ok); }
.status-lamp.lamp-ok::before {
  background: radial-gradient(circle at 34% 30%, #d4ffe4 0%, var(--ok) 42%, var(--ok-dim) 100%);
  box-shadow: 0 0 8px var(--ok-glow);
}

.status-lamp.lamp-bad { color: var(--bad); }
.status-lamp.lamp-bad::before {
  background: radial-gradient(circle at 34% 30%, #ffe0e0 0%, var(--bad) 42%, var(--bad-dim) 100%);
  box-shadow: 0 0 8px var(--bad-glow);
}

/* small dot lamps used inline in tables */

.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 7px;
  vertical-align: middle;
  background: var(--ink-faint);
}

.dot-ok {
  background: radial-gradient(circle at 34% 30%, #d4ffe4 0%, var(--ok) 42%, var(--ok-dim) 100%);
  box-shadow: 0 0 6px var(--ok-glow);
}
.dot-bad {
  background: radial-gradient(circle at 34% 30%, #ffe0e0 0%, var(--bad) 42%, var(--bad-dim) 100%);
  box-shadow: 0 0 6px var(--bad-glow);
}
.dot-muted { background: var(--ink-faint); }

/* readout: inset digital display for numeric/data values */

.readout {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--warn);
  background: var(--readout-bg);
  border: 1px solid var(--bezel);
  border-radius: 2px;
  padding: 2px 7px;
  box-shadow: inset 0 1px 3px var(--bezel-lo);
}

table.ticker .readout { box-shadow: none; }

/* ---------------------------------------------------------------- */
/* tables -> relay bank / ticker                                     */
/* ---------------------------------------------------------------- */

.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }

th {
  text-align: left;
  padding: 8px 10px;
  color: var(--ink-faint);
  font-weight: 600;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--bezel);
}

td {
  text-align: left;
  padding: 10px;
  border-bottom: 1px solid var(--bezel);
  color: var(--ink);
  vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(255, 255, 255, 0.02); }

table.ticker td { font-family: var(--font-mono); font-size: 12.5px; }
table.ticker .readout { color: var(--ink-dim); background: transparent; border: none; padding: 0; }

.scanlines {
  position: relative;
  background: var(--readout-bg);
  margin: 0 -18px -18px;
  padding: 14px 18px 16px;
}

.scanlines::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.025) 0px, rgba(255, 255, 255, 0.025) 1px, transparent 1px, transparent 3px);
}

.scanlines > * { position: relative; }
.scanlines table.ticker td { border-bottom-color: rgba(255, 255, 255, 0.05); }
.scanlines .dot { box-shadow: none; }
.scanlines .dot-ok { box-shadow: 0 0 8px var(--ok-glow); }
.scanlines .dot-bad { box-shadow: 0 0 8px var(--bad-glow); }

.cell-name { font-weight: 600; }

.actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.actions form { display: inline; }

/* ---------------------------------------------------------------- */
/* remote-card grid: relay slots, not table rows                     */
/* ---------------------------------------------------------------- */

.remote-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.remote-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  background:
    repeating-linear-gradient(115deg, rgba(255, 255, 255, 0.015) 0px, rgba(255, 255, 255, 0.015) 1px, transparent 1px, transparent 3px),
    linear-gradient(165deg, #1c2027 0%, var(--panel) 55%, #14171c 100%);
  border: 1px solid var(--bezel);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 var(--bezel-hi), 0 1px 0 rgba(0, 0, 0, 0.5), 0 8px 18px -14px rgba(0, 0, 0, 0.7);
  transition: opacity 200ms ease;
}

.remote-card.is-disabled { opacity: 0.6; }

.remote-card .rc-name {
  font-weight: 700;
  font-size: 14px;
  color: var(--ink);
}

.remote-card .rc-code-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.remote-card .rc-meta {
  font-size: 10.5px;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
}

.remote-card .rc-switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--bezel);
}

.remote-card .rc-switch-row .rc-switch-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.remote-card .rc-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

/* ---------------------------------------------------------------- */
/* buttons -> panel keys                                             */
/* ---------------------------------------------------------------- */

button, .key {
  font-family: var(--font-display);
  border: 1px solid var(--bezel);
  background: var(--panel-raised);
  color: var(--ink);
  padding: 7px 13px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  box-shadow: inset 0 1px 0 var(--bezel-hi);
  transition: border-color 150ms ease, transform 80ms ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

button:hover, .key:hover { border-color: var(--ink-faint); }
button:active, .key:active { transform: translateY(1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

a.key.link {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
  color: var(--ink-dim);
  padding: 7px 8px;
}
a.key.link:hover { color: var(--ink); }

button.danger { color: var(--bad); border-color: var(--bad-dim); }
button.danger:hover { border-color: var(--bad); background: rgba(255, 92, 92, 0.06); }

button.primary {
  background: var(--warn);
  border-color: var(--warn);
  color: #16130a;
}
button.primary:hover { background: #ffbe45; border-color: #ffbe45; }

/* relay paddle switch for enable/disable */

.switch {
  position: relative;
  width: 44px;
  height: 22px;
  padding: 0;
  border-radius: 3px;
  background: var(--readout-bg);
  border: 1px solid var(--bezel);
  box-shadow: inset 0 2px 4px var(--bezel-lo);
}

.switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 16px;
  border-radius: 2px;
  background: linear-gradient(180deg, #7b8290, #565d68);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px var(--bezel-lo);
  transition: transform 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.switch[aria-pressed="true"]::after {
  transform: translateX(22px);
  background: linear-gradient(180deg, #6bf0a0, var(--ok-dim));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3), 0 0 7px var(--ok-glow);
}

.switch:hover { border-color: var(--ink-faint); }

/* ---------------------------------------------------------------- */
/* forms                                                              */
/* ---------------------------------------------------------------- */

.form, .inline-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 380px;
}

.inline-form { flex-direction: row; align-items: flex-end; flex-wrap: wrap; max-width: none; gap: 12px; }

.field { display: flex; flex-direction: column; gap: 6px; }

label {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

input[type="text"], input[type="number"] {
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 9px 11px;
  border: 1px solid var(--bezel);
  border-radius: var(--radius);
  background: var(--readout-bg);
  color: var(--warn);
  box-shadow: inset 0 1px 3px var(--bezel-lo);
}

input[type="text"] { color: var(--ink); }

input::placeholder { color: var(--ink-faint); }

input:focus { border-color: var(--warn); }

.inline-form input[type="number"] { width: 110px; }

.form button, .inline-form button { align-self: flex-start; }

/* ---------------------------------------------------------------- */
/* empty state                                                        */
/* ---------------------------------------------------------------- */

.empty-slot {
  border: 1px dashed var(--bezel);
  border-radius: var(--radius);
  padding: 22px 18px;
  text-align: center;
  color: var(--ink-dim);
  font-size: 13px;
}

.empty-slot a { font-weight: 600; }

.empty-row td {
  text-align: center;
  color: var(--ink-faint);
  font-style: normal;
  padding: 20px 10px;
}

/* ---------------------------------------------------------------- */
/* signal feed rows (remote_form)                                    */
/* ---------------------------------------------------------------- */

.signal-row { cursor: pointer; }
.signal-row:hover td { background: rgba(255, 176, 32, 0.05); }
.signal-row.picked td { background: rgba(255, 176, 32, 0.1); color: var(--warn); }

@keyframes rowIn {
  from { opacity: 0; transform: translateY(-2px); }
  to { opacity: 1; transform: translateY(0); }
}

#signal-table tbody tr, #log-table tbody tr { animation: rowIn 200ms ease-out both; }

/* ---------------------------------------------------------------- */
/* responsive: stack tables at narrow widths                          */
/* ---------------------------------------------------------------- */

@media (max-width: 640px) {
  .rack-header { padding: 12px 16px; }
  .rack-body { padding: 20px 12px 60px; }
  .panel-plate { padding: 11px 14px; }
  .panel-body { padding: 14px; }
  .scanlines { margin: 0 -14px -14px; padding: 12px 14px 14px; }

  .hero-status { padding: 20px 18px 24px; gap: 16px; }
  .hero-settings { margin-left: 0; width: 100%; }
  .lamp-big { width: 46px; height: 46px; }

  .remote-grid { grid-template-columns: 1fr; }

  table.stack thead { display: none; }
  table.stack, table.stack tbody, table.stack tr, table.stack td { display: block; width: 100%; }
  table.stack tr {
    border: 1px solid var(--bezel);
    border-radius: var(--radius);
    margin-bottom: 10px;
    padding: 4px 0;
  }
  table.stack td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--bezel);
    padding: 8px 12px;
  }
  table.stack td:last-child { border-bottom: none; }
  table.stack td::before {
    content: attr(data-label);
    color: var(--ink-faint);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    flex: none;
  }
  table.stack td.actions { justify-content: flex-end; }
  table.stack td.actions::before { display: none; }

  table.stack .empty-row td { display: block; text-align: center; border: none; }
}