/* ============================================================================
   VPS Telemetry Console
   Zero-radius military instrumentation aesthetic.
   Two themes driven entirely by CSS custom properties:
     - NIGHT (default) : hull black + phosphor glow
     - DAY             : bridge daylight, dark inks, no glow
   ========================================================================= */

:root,
html[data-theme="dark"] {
  --bg: #0c0e10;
  --surface: #111416;
  --surface-low: #1a1c1e;
  --surface-mid: #1e2022;
  --surface-high: #282a2c;
  --surface-highest: #333537;
  --track: #16181a;

  --text: #e2e2e5;
  --text-dim: #c9cbb4;
  --muted: #8f9184;
  --outline: #4b4a3a;
  --line: #26261f;

  /* Single hue: neon yellow. Severity reads as luminance + fill, never a second hue. */
  --neon: #eaff00;
  --neon-ink: #14170a;

  --ok: #eaff00;   /* nominal   — full neon       */
  --cy: #c2cd00;   /* secondary — slightly dimmed */
  --amb: #9aa500;  /* warning   — dimmed further  */
  --err: #f4ff5c;  /* critical  — hottest core    */

  --glow-ok: 0 0 6px rgba(234, 255, 0, 0.45);
  --glow-cy: 0 0 6px rgba(194, 205, 0, 0.40);
  --glow-amb: 0 0 6px rgba(154, 165, 0, 0.45);

  /* Chart series hues — distinct per trace so CPU / MEM / NET RX read at a glance.
     Severity tokens above stay single-hue; only the history chart gets per-series color. */
  --chart-cpu: #eaff00;
  --chart-mem: #00e5ff;
  --chart-net: #ff5c8a;
  --glow-mem: 0 0 6px rgba(0, 229, 255, 0.45);
  --glow-net: 0 0 6px rgba(255, 92, 138, 0.45);

  /* Fill/ink pair for solid blocks — bars, chips, markers. Day keeps these at true neon
     even though its text accents darken, so the highlights still read as neon on paper. */
  --fill-ok: #eaff00;
  --fill-cy: #c2cd00;
  --fill-amb: #9aa500;
  --fill-err: #f4ff5c;
  --fill-ink: #14170a;

  color-scheme: dark;
}

html[data-theme="light"] {
  --bg: #f4f5f1;
  --surface: #ffffff;
  --surface-low: #ffffff;
  --surface-mid: #f5f6f2;
  --surface-high: #ebede7;
  --surface-highest: #c4c7bd;   /* strong borders — Day is high-contrast, not washed out */
  --track: #e9ebe4;

  --text: #1a1b17;
  --text-dim: #43453d;
  --muted: #70726a;
  --outline: #adafa5;
  --line: #e4e6e0;

  /* Neon is unreadable as ink on paper, so text accents are the same hue darkened —
     which means green-leading (G >= R), the way neon #eaff00 is. Orange-leading dark
     yellows (R > G) are what read as brown. Fills keep the true neon. */
  --neon: #eaff00;
  --neon-ink: #14170a;

  --ok: #5c6800;
  --cy: #4d5810;
  --amb: #6d7800;
  --err: #5c6800;

  --glow-ok: none;
  --glow-cy: none;
  --glow-amb: none;

  /* Chart series hues — darkened inks for the Day bridge, same hues as Night. */
  --chart-cpu: #5c6800;
  --chart-mem: #007a8a;
  --chart-net: #a8005c;
  --glow-mem: none;
  --glow-net: none;

  --fill-ok: #eaff00;
  --fill-cy: #d4e200;
  --fill-amb: #bcc800;
  --fill-err: #eaff00;
  --fill-ink: #14170a;

  /* `only` opts the Day theme out of browser force-dark, which otherwise inverts it
     into a muddy olive on a dark-OS machine instead of showing the real palette. */
  color-scheme: only light;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}

.mono { font-variant-numeric: tabular-nums; }
.ok { color: var(--ok); } .cy { color: var(--cy); } .amb { color: var(--amb); }
.err { color: var(--err); } .dim { color: var(--muted); }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--surface-highest); }

/* ------------------------------------------------------------------ top bar */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 40;
  height: 3.5rem;
  display: flex; align-items: center; justify-content: space-between;
  gap: .75rem; padding: 0 .75rem;
  background: var(--surface);
  border-bottom: 1px solid var(--surface-highest);
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: .5rem; flex-wrap: wrap; }

.badge {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .25rem .5rem;
  background: var(--surface-low);
  border: 1px solid var(--surface-highest);
}
.badge .label { font-size: 9px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.badge .glyph { font-size: 12px; color: var(--muted); }
.badge.ok .label { color: var(--ok); }
.badge .dot {
  width: 8px; height: 8px; background: var(--fill-ok); box-shadow: var(--glow-ok);
}
.badge.stale { border-color: var(--amb); }
.badge.stale .label { color: var(--amb); }
.badge.stale .dot { background: var(--fill-amb); box-shadow: var(--glow-amb); }

.topbar-stat { display: flex; align-items: center; gap: .35rem; font-size: 10px; letter-spacing: .06em; }
.topbar-stat .k { color: var(--muted); }
.topbar-stat .v { color: var(--text); font-variant-numeric: tabular-nums; }
.topbar-stat .sep { color: var(--outline); }

.theme-switch { display: inline-flex; border: 1px solid var(--outline); }
.theme-switch button {
  font: inherit; font-size: 9px; font-weight: 700; letter-spacing: .12em;
  padding: .3rem .55rem; cursor: pointer;
  background: transparent; color: var(--muted);
  border: 0; border-right: 1px solid var(--outline);
}
.theme-switch button:last-child { border-right: 0; }
.theme-switch button.active { background: var(--neon); color: var(--neon-ink); }
.theme-switch button:hover:not(.active) { color: var(--text); background: var(--surface-high); }

/* ---------------------------------------------------------------------- main */
main {
  padding: 4.5rem .75rem 3.5rem;
}

/* ----------------------------------------------------------------- empty state */
.empty { display: flex; justify-content: center; padding: 2rem 0 1rem; }
.empty[hidden] { display: none; }
.empty-box {
  max-width: 720px; width: 100%;
  border: 1px dashed var(--outline);
  background: var(--surface);
  padding: 1.25rem;
}
.empty-title { color: var(--amb); font-weight: 700; letter-spacing: .14em; font-size: 13px; }
.empty-sub { color: var(--text-dim); margin-top: .5rem; font-size: 11px; }
.empty-cmd {
  margin: .75rem 0 0; padding: .6rem .75rem;
  background: var(--surface-low); border: 1px solid var(--surface-highest);
  color: var(--ok); font-size: 11px; overflow-x: auto;
}

/* -------------------------------------------------------------------- banner */
.banner {
  background: var(--surface);
  border: 1px solid var(--surface-highest);
  padding: .6rem .6rem .5rem;
  margin-bottom: .5rem;
}
.banner-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .6rem; }
.banner-id { display: flex; align-items: center; gap: .6rem; }
.square { width: 12px; height: 12px; background: var(--fill-ok); box-shadow: var(--glow-ok); flex: none; }
.banner-title { font-size: 14px; font-weight: 700; letter-spacing: .06em; color: var(--ok); }
.banner-title .tag {
  font-size: 9px; padding: 0 .3rem; margin-left: .35rem;
  background: var(--surface-high); color: var(--ok);
}
.banner-sub { font-size: 10px; color: var(--text-dim); letter-spacing: .04em; }
.banner-chips { display: flex; flex-wrap: wrap; gap: .35rem; }
.chip {
  display: inline-flex; align-items: center; gap: .35rem;
  padding: .25rem .5rem; background: var(--surface-low);
  border: 1px solid var(--surface-highest);
  font-size: 9px; letter-spacing: .08em; text-transform: uppercase;
}
.chip .k { color: var(--muted); }
.banner-load {
  display: flex; flex-wrap: wrap; align-items: center; gap: .6rem;
  margin-top: .5rem; padding-top: .4rem;
  border-top: 1px solid var(--surface-high);
  color: var(--text-dim); font-size: 10px; letter-spacing: .04em;
}
.banner-load .sep { color: var(--outline); }
.banner-load strong { color: var(--ok); }

/* ---------------------------------------------------------------- quadrants */
.quad-grid {
  display: grid; gap: .25rem; margin-bottom: .5rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.panel {
  background: var(--surface);
  border: 1px solid var(--surface-highest);
  padding: .55rem;
  position: relative;
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between; gap: .5rem;
  border-bottom: 1px solid var(--surface-high);
  padding-bottom: .3rem; margin-bottom: .4rem;
}
.panel-title {
  display: flex; align-items: center; gap: .4rem;
  font-size: 10px; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text);
}
.panel-meta { font-size: 9px; color: var(--muted); letter-spacing: .08em; white-space: nowrap; }
.dot { width: 8px; height: 8px; flex: none; background: var(--fill-ok); }
.dot.cy { background: var(--fill-cy); box-shadow: var(--glow-cy); }
.dot.amb { background: var(--fill-amb); box-shadow: var(--glow-amb); }

.big-row { display: flex; align-items: flex-start; justify-content: space-between; gap: .5rem; margin-bottom: .4rem; }
.big-value { font-size: 30px; font-weight: 700; line-height: 1.05; letter-spacing: -.02em; color: var(--text); }
.big-value.ok { color: var(--ok); text-shadow: var(--glow-ok); }
.big-value.cy { color: var(--cy); text-shadow: var(--glow-cy); }
.big-value.amb { color: var(--amb); text-shadow: var(--glow-amb); }
.big-value.err { color: var(--err); }
.big-unit { font-size: 13px; font-weight: 600; }
.big-label { font-size: 9px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.right-note { text-align: right; font-size: 10px; color: var(--text); }
.state {
  font-size: 9px; font-weight: 700; letter-spacing: .1em; padding: .15rem .35rem;
  background: var(--fill-ok); color: var(--fill-ink);
}
.state.warn { background: var(--fill-amb); color: var(--fill-ink); }
.state.crit { background: var(--fill-err); color: var(--fill-ink); }

/* per-core matrix */
.cores { display: flex; flex-direction: column; gap: .2rem; margin-bottom: .4rem; }
.core-row { display: flex; align-items: center; justify-content: space-between; gap: .5rem; font-size: 10px; color: var(--text-dim); }
.core-track { flex: 1; height: 6px; background: var(--track); overflow: hidden; }
.core-fill { height: 100%; background: var(--fill-ok); }
.core-fill.cy { background: var(--fill-cy); }
.core-fill.amb { background: var(--fill-amb); }
.core-fill.err { background: var(--fill-err); }

.mini { background: var(--surface-low); border: 1px solid var(--surface-highest); padding: .25rem; }
.mini svg { display: block; width: 100%; height: 44px; }

/* stacked capacity bar */
.stack { display: flex; height: 12px; background: var(--track); overflow: hidden; gap: 1px; margin-bottom: .3rem; }
.stack .seg { height: 100%; }
.stack .seg.free { background: var(--surface-high); }
.scale { display: flex; justify-content: space-between; font-size: 9px; color: var(--muted); margin-bottom: .35rem; }

/* key/value rows */
.kv { display: flex; flex-direction: column; gap: .12rem; font-size: 10px; color: var(--text-dim); }
.kv .row { display: flex; justify-content: space-between; gap: .5rem; }
.kv .row .k { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.kv .row .v { color: var(--text); text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.kv .row .v.ok { color: var(--ok); } .kv .row .v.cy { color: var(--cy); } .kv .row .v.amb { color: var(--amb); }
.kv-foot {
  display: flex; justify-content: space-between; gap: .5rem;
  margin-top: .35rem; padding-top: .3rem;
  border-top: 1px solid var(--surface-high);
  font-size: 9px; color: var(--muted); letter-spacing: .06em; text-transform: uppercase;
}
.kv-foot b { color: var(--text); font-weight: 600; }

/* rx/tx split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: .35rem; background: var(--surface-low); border: 1px solid var(--surface-highest); padding: .35rem; margin-bottom: .3rem; }
.split > div { display: flex; flex-direction: column; gap: .1rem; }
.split .brd { border-left: 1px solid var(--surface-high); padding-left: .35rem; }
.split-val { font-size: 14px; font-weight: 700; }
.split-sub { font-size: 9px; color: var(--muted); }

/* ------------------------------------------------------------------- history */
.history { margin-bottom: .5rem; }
.range-switch { display: inline-flex; border: 1px solid var(--outline); }
.range-switch button {
  font: inherit; font-size: 9px; font-weight: 700; letter-spacing: .1em;
  padding: .2rem .5rem; cursor: pointer; background: transparent; color: var(--muted);
  border: 0; border-right: 1px solid var(--outline);
}
.range-switch button:last-child { border-right: 0; }
.range-switch button.active { background: var(--neon); color: var(--neon-ink); }
.range-switch button:hover:not(.active) { color: var(--text); background: var(--surface-high); }
.legend { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; font-size: 9px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: .35rem; }
.legend .sw { display: inline-block; width: 14px; height: 2px; margin-right: .3rem; vertical-align: middle; background: var(--chart-cpu); }
.legend .sw.sw-mem { background: var(--chart-mem); }
.legend .sw.sw-net { background: var(--chart-net); }
.legend-note { margin-left: auto; color: var(--muted); }
.chart { position: relative; }
.chart svg { display: block; width: 100%; height: 220px; }

/* Axis text. The chart is drawn at 1:1 pixel scale (viewBox == element size) so
   these are never stretched; font-family has to be set explicitly because SVG text
   does not inherit it the way HTML does. */
.chart svg text {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
  font-variant-numeric: tabular-nums;
}
.chart .ax { fill: var(--text-dim); }
.chart .ax-net { fill: var(--chart-net); }
.chart .ax-cap { fill: var(--muted); font-size: 9px; letter-spacing: .12em; }
.chart-cursor {
  position: absolute; top: 0; bottom: 0; width: 1px;
  background: var(--muted); opacity: .55; pointer-events: none;
}
.chart-dot {
  position: absolute; width: 7px; height: 7px; border-radius: 50%;
  transform: translate(-50%, -50%); pointer-events: none;
  border: 1px solid var(--bg);
}
.chart-dot.dot-cpu { background: var(--chart-cpu); box-shadow: var(--glow-ok); }
.chart-dot.dot-mem { background: var(--chart-mem); box-shadow: var(--glow-mem); }
.chart-dot.dot-net { background: var(--chart-net); box-shadow: var(--glow-net); }
.chart-cursor[hidden], .chart-dot[hidden], .chart-tip[hidden] { display: none; }
.chart-tip {
  position: absolute; z-index: 6; pointer-events: none;
  background: var(--surface-low); border: 1px solid var(--outline);
  padding: .35rem .5rem; font-size: 10px; line-height: 1.55;
  color: var(--text); white-space: nowrap;
}
.chart-tip .tip-ts { color: var(--muted); margin-bottom: .15rem; letter-spacing: .06em; }
.chart-tip .tip-row { display: flex; align-items: center; gap: .35rem; }
.chart-tip .tip-row b { margin-left: auto; padding-left: .75rem; color: var(--text); }
.chart-tip .sw { display: inline-block; width: 10px; height: 2px; background: var(--chart-cpu); }
.chart-tip .sw.sw-mem { background: var(--chart-mem); }
.chart-tip .sw.sw-net { background: var(--chart-net); }

/* ------------------------------------------------------------------- lower */
.lower { display: grid; grid-template-columns: 8fr 4fr; gap: .5rem; }
.side { display: flex; flex-direction: column; gap: .5rem; }
.scan-files { margin-top: .45rem; padding-top: .45rem; border-top: 1px solid var(--surface-high); }

.table-wrap { overflow-x: auto; }
.proc-table { width: 100%; border-collapse: collapse; font-size: 11px; font-variant-numeric: tabular-nums; }
.proc-table thead th {
  background: var(--surface-high); color: var(--muted);
  font-size: 9px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  text-align: left; padding: .3rem .4rem; border-bottom: 1px solid var(--surface-highest);
}
.proc-table th.right, .proc-table td.right { text-align: right; }
.proc-table tbody tr { border-bottom: 1px solid var(--line); }
.proc-table tbody tr:nth-child(even) { background: color-mix(in srgb, var(--surface-low) 55%, transparent); }
.proc-table tbody tr:hover { background: var(--surface-high); }
.proc-table td { padding: .35rem .4rem; }
.proc-table .pid { color: var(--ok); font-weight: 700; }
.proc-table .name { color: var(--text); font-weight: 600; }
.proc-table .bar-cell { width: 40%; }
.bar-inline { display: inline-flex; width: 100%; height: 6px; background: var(--track); }
.bar-inline i { display: block; height: 100%; background: var(--fill-ok); }
.bar-inline i.cy { background: var(--fill-cy); }

/* ring buffer */
.ring { margin-top: .5rem; padding-top: .4rem; border-top: 1px solid var(--surface-high); }
.ring-head { display: flex; align-items: center; justify-content: space-between; font-size: 9px; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: .3rem; }
.pulse { color: var(--ok); animation: pulse 1.8s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .25; } }
.ring-body {
  background: var(--surface-low); border: 1px solid var(--surface-highest);
  padding: .35rem; height: 8.5rem; overflow: hidden;
  display: flex; flex-direction: column; gap: .18rem;
  font-size: 10px; color: var(--text-dim);
}
.ring-body .line { display: flex; gap: .5rem; white-space: nowrap; }
.ring-body .ts { color: var(--muted); }
.ring-body .flag { font-weight: 700; }
.ring-body .flag.nom { color: var(--ok); } .ring-body .flag.wrn { color: var(--amb); }
.ring-body .flag.sec { color: var(--cy); }

/* -------------------------------------------------------------- bottom bars */
.bottombar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem;
  margin-top: .5rem; padding-top: .4rem;
  border-top: 1px solid var(--surface-highest);
  color: var(--muted); font-size: 9px; letter-spacing: .08em; text-transform: uppercase;
}
.bottombar .mono { text-transform: none; }
.bottombar > div:last-child { display: flex; gap: .75rem; }

footer {
  position: fixed; inset: auto 0 0 0; z-index: 40; height: 2.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: .5rem;
  padding: 0 .75rem;
  background: var(--surface); border-top: 1px solid var(--surface-highest);
  color: var(--muted); font-size: 9px; letter-spacing: .08em; text-transform: uppercase;
}
footer > div { display: flex; align-items: center; gap: .75rem; }
footer .dim { text-transform: uppercase; }

/* ------------------------------------------------------------- responsive */
@media (max-width: 1200px) {
  .quad-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lower { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .quad-grid { grid-template-columns: 1fr; }
  .topbar-stat { display: none; }
  .chart svg { height: 160px; }
}