/* ───────────────────────────────────────────────────────────────────
   Penumbra — design tokens
   Palette is intentionally narrow: a near-black canvas, three saturated
   accents (one per zone class), and one warm warning. Anything else
   risks looking like a generic "neon dark" template.
─────────────────────────────────────────────────────────────────── */
:root {
  --bg-0: #07080b;            /* page background */
  --bg-1: #0d0f14;            /* card surface */
  --bg-2: #14171f;            /* nested surface / hovered */
  --bg-3: #1a1e29;            /* recessed input */

  --line-1: rgba(255,255,255,0.06);
  --line-2: rgba(255,255,255,0.10);
  --line-3: rgba(255,255,255,0.18);

  --fg-0: #e8eaf0;
  --fg-1: #a8aebd;
  --fg-2: #6b7282;
  --fg-3: #3e4452;

  /* zone class accents */
  --hard:  #ff5d6c;   /* must-not-enter */
  --soft:  #ffb547;   /* slow / penalize */
  --trust: #5ce1c4;   /* explicitly allowed */
  --agent: #82a4ff;   /* the agent itself */
  --sensor:#9f7aea;   /* sensor / perception */

  --ok:    #5ce1c4;
  --warn:  #ffb547;
  --crit:  #ff5d6c;
  --info:  #82a4ff;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI Variable",
               "Segoe UI", Roboto, Inter, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono",
               Menlo, Consolas, monospace;

  --rail-w: 304px;
  --rail-w-r: 320px;
  --topbar-h: 52px;

  --r-1: 6px;
  --r-2: 10px;
  --r-3: 14px;

  --shadow-1: 0 1px 0 rgba(255,255,255,0.04) inset,
              0 0 0 1px rgba(255,255,255,0.04),
              0 8px 24px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  height: 100%;
  background: var(--bg-0);
  color: var(--fg-0);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}

body {
  /* Subtle radial vignette so the viewport never looks pure black. */
  background:
    radial-gradient(120% 80% at 50% -20%, rgba(95,113,255,0.08), transparent 60%),
    radial-gradient(80% 60% at 50% 110%, rgba(124,58,237,0.05), transparent 60%),
    var(--bg-0);
}

button { font: inherit; color: inherit; }
a { color: var(--fg-1); text-decoration: none; }
a:hover { color: var(--fg-0); }

/* ───────────── Top bar ───────────── */

.topbar {
  height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--line-1);
  background: linear-gradient(to bottom, rgba(255,255,255,0.02), transparent);
}

.topbar__brand { display: flex; align-items: center; gap: 10px; }
.topbar__logo  { width: 22px; height: 22px; color: var(--trust); }
.topbar__name  { font-weight: 600; letter-spacing: 0.02em; }
.topbar__tag   {
  color: var(--fg-2); font-size: 12px; padding-left: 12px;
  border-left: 1px solid var(--line-2); margin-left: 4px;
}

.topbar__meta { display: flex; align-items: center; gap: 12px; }
.topbar__link {
  font-size: 12px; padding: 4px 10px; border: 1px solid var(--line-2);
  border-radius: var(--r-1);
}
.topbar__link:hover { border-color: var(--line-3); background: var(--bg-2); }

/* status pill */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  font-size: 12px; color: var(--fg-1);
}
.pill__dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--fg-3);
  box-shadow: 0 0 0 0 currentColor;
}
.pill--ok    .pill__dot { background: var(--ok);   animation: pulse 2.4s infinite; color: var(--ok); }
.pill--warn  .pill__dot { background: var(--warn); animation: pulse 1.6s infinite; color: var(--warn); }
.pill--crit  .pill__dot { background: var(--crit); animation: pulse 0.9s infinite; color: var(--crit); }

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 currentColor; }
  70%  { box-shadow: 0 0 0 6px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.kbd {
  font-family: var(--font-mono);
  font-size: 11px; color: var(--fg-2);
  padding: 3px 8px;
  border: 1px solid var(--line-1);
  border-radius: var(--r-1);
  background: var(--bg-1);
}

/* ───────────── App grid ───────────── */

.app {
  height: calc(100% - var(--topbar-h));
  display: grid;
  grid-template-columns: var(--rail-w) 1fr var(--rail-w-r);
  gap: 1px;
  background: var(--line-1); /* the gap acts as dividers */
}

.rail {
  background: var(--bg-0);
  padding: 12px;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--line-3) transparent;
}

.rail::-webkit-scrollbar { width: 8px; }
.rail::-webkit-scrollbar-thumb { background: var(--line-3); border-radius: 4px; }

/* ───────────── Card ───────────── */

.card {
  background: var(--bg-1);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}
.card--grow { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.card--grow .card__body { flex: 1; overflow-y: auto; }

.card__header {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line-1);
  background: linear-gradient(to bottom, rgba(255,255,255,0.025), transparent);
}
.card__title {
  margin: 0; font-size: 12px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--fg-0);
}
.card__hint  {
  font-size: 11px; color: var(--fg-2);
  font-family: var(--font-mono);
}
.card__body  { padding: 12px; }

/* ───────────── Scenario grid ───────────── */

.scenario-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.scenario {
  text-align: left;
  padding: 10px;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  cursor: pointer;
  transition: border-color 120ms, background 120ms, transform 120ms;
}
.scenario:hover { border-color: var(--line-3); background: var(--bg-3); }
.scenario[data-active="true"] {
  border-color: var(--trust);
  background: linear-gradient(to bottom, rgba(92,225,196,0.08), transparent),
              var(--bg-2);
  box-shadow: 0 0 0 1px var(--trust) inset;
}
.scenario__name { font-weight: 600; font-size: 12px; }
.scenario__sub  { font-size: 10.5px; color: var(--fg-2); margin-top: 2px; }

/* ───────────── Tools (zone painters) ───────────── */

.tool-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
  margin-bottom: 12px;
}
.tool {
  display: flex; flex-direction: column; align-items: flex-start; gap: 2px;
  padding: 8px 10px;
  background: var(--bg-2);
  border: 1px solid var(--line-1);
  border-radius: var(--r-2);
  cursor: pointer;
  text-align: left;
  transition: border-color 120ms, background 120ms;
}
.tool:hover { border-color: var(--line-3); }
.tool[data-active="true"] {
  border-color: currentColor;
  box-shadow: 0 0 0 1px currentColor inset;
}
.tool[data-tool="paint-hard"]  { color: var(--hard); }
.tool[data-tool="paint-soft"]  { color: var(--soft); }
.tool[data-tool="paint-trust"] { color: var(--trust); }
.tool--ghost   { color: var(--fg-1); grid-column: 1 / -1; }
.tool__swatch  { width: 10px; height: 10px; border-radius: 2px; background: currentColor; }
.tool__swatch--hard  { background: var(--hard); }
.tool__swatch--soft  { background: var(--soft); }
.tool__swatch--trust { background: var(--trust); }
.tool__label { font-size: 12px; font-weight: 600; color: var(--fg-0); }
.tool__sub   { font-size: 10.5px; color: var(--fg-2); }

.zone-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 4px;
  max-height: 180px; overflow-y: auto;
}
.zone-list__empty { color: var(--fg-2); font-size: 11.5px; padding: 6px 0; }
.zone-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px; border-radius: var(--r-1);
  background: var(--bg-2);
  font-size: 11.5px;
}
.zone-item__swatch { width: 8px; height: 8px; border-radius: 2px; }
.zone-item__name   { flex: 1; color: var(--fg-1); font-family: var(--font-mono); }
.zone-item__del    {
  background: none; border: none; color: var(--fg-3); cursor: pointer; font-size: 14px;
}
.zone-item__del:hover { color: var(--crit); }

/* ───────────── Toggles ───────────── */

.toggle {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 4px;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
}
.toggle input { accent-color: var(--trust); }
.toggle:hover { color: var(--fg-0); }

/* Generic button */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 12px;
  background: var(--bg-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-1);
  color: var(--fg-0);
  font-size: 12px; cursor: pointer;
  transition: background 120ms, border-color 120ms;
}
.btn:hover { background: var(--bg-3); border-color: var(--line-3); }
.btn--ghost { background: transparent; }

/* ───────────── Viewport ───────────── */

.viewport {
  position: relative;
  background: #03040a;
  overflow: hidden;
}
.viewport canvas { display: block; width: 100%; height: 100%; }

.hud {
  position: absolute;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-1);
}
.hud--bottom-left  { left: 12px; bottom: 12px; }
.hud--bottom-right { right: 12px; bottom: 12px; display: flex; gap: 6px; pointer-events: auto; }
.hud__row { display: flex; gap: 8px; padding: 1px 0; }
.hud__k   { color: var(--fg-3); width: 56px; }
.hud__v   { color: var(--fg-0); }

.hud__btn {
  background: rgba(13,15,20,0.78);
  border: 1px solid var(--line-2);
  color: var(--fg-1);
  font-family: var(--font-mono); font-size: 11px;
  padding: 6px 10px; border-radius: var(--r-1);
  cursor: pointer;
  backdrop-filter: blur(8px);
}
.hud__btn:hover { color: var(--fg-0); border-color: var(--line-3); }
.hud__btn[data-active="true"] { color: var(--trust); border-color: var(--trust); }

/* ───────────── Alert stack (violations) ───────────── */

.alert-stack {
  position: absolute; top: 12px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 6px;
  pointer-events: none;
}
.alert {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px;
  border-radius: var(--r-2);
  background: rgba(255,93,108,0.18);
  border: 1px solid rgba(255,93,108,0.55);
  color: #ffeaee;
  font-size: 12px;
  font-family: var(--font-mono);
  backdrop-filter: blur(8px);
  animation: slide-in 220ms cubic-bezier(.2,.8,.2,1);
}
.alert--warn { background: rgba(255,181,71,0.18); border-color: rgba(255,181,71,0.55); color: #fff1d6; }
.alert--info { background: rgba(130,164,255,0.18); border-color: rgba(130,164,255,0.55); color: #e1eaff; }
.alert__dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor; flex-shrink: 0;
}

@keyframes slide-in {
  from { transform: translateY(-8px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

/* ───────────── Telemetry ───────────── */

.stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px 12px;
}
.stat {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 6px 8px;
  background: var(--bg-2);
  border-radius: var(--r-1);
  font-family: var(--font-mono);
}
.stat__k { color: var(--fg-2); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; }
.stat__v { color: var(--fg-0); font-size: 13px; font-variant-numeric: tabular-nums; }

/* Spoof meter */
.meter {
  height: 8px; border-radius: 999px;
  background: var(--bg-3);
  overflow: hidden;
  position: relative;
}
.meter__fill {
  height: 100%; width: 0%;
  background: linear-gradient(to right, var(--ok), var(--warn) 60%, var(--crit) 90%);
  transition: width 240ms cubic-bezier(.2,.8,.2,1);
}
.meter__caption {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px; color: var(--fg-1);
}

/* Decision feed */
.feed { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.feed__empty { color: var(--fg-2); font-size: 11.5px; padding: 6px 0; }
.feed__row {
  display: flex; align-items: baseline; gap: 8px;
  padding: 4px 8px;
  background: var(--bg-2);
  border-radius: var(--r-1);
  font-family: var(--font-mono);
  font-size: 11px;
}
.feed__t   { color: var(--fg-3); }
.feed__zone { color: var(--fg-1); }
.feed__verdict { font-weight: 600; }
.feed__verdict--ok    { color: var(--ok); }
.feed__verdict--warn  { color: var(--warn); }
.feed__verdict--violation { color: var(--crit); }

/* Audit chain */
.audit { display: flex; flex-direction: column; gap: 4px; }
.audit__row { display: flex; justify-content: space-between; gap: 8px; font-family: var(--font-mono); font-size: 11px; }
.audit__k { color: var(--fg-2); }
.audit__v { color: var(--fg-0); font-variant-numeric: tabular-nums; }
.audit__hash { font-size: 10.5px; color: var(--fg-1); }

/* ───────────── Boot screen ───────────── */

.boot {
  position: fixed; inset: 0;
  background: var(--bg-0);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  transition: opacity 320ms ease, visibility 320ms;
}
.boot.is-hidden { opacity: 0; pointer-events: none; visibility: hidden; }
.boot__inner {
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  color: var(--trust);
}
.boot__logo svg { animation: spin 6s linear infinite; }
@keyframes spin { from { transform: rotate(0); } to { transform: rotate(360deg); } }
.boot__text { font-weight: 600; letter-spacing: 0.32em; font-size: 14px; color: var(--fg-0); }
.boot__sub  { font-family: var(--font-mono); font-size: 11px; color: var(--fg-2); }

/* ───────────── Responsive (down to 1280×720) ───────────── */

@media (max-width: 1380px) {
  :root { --rail-w: 268px; --rail-w-r: 288px; }
  .stats { grid-template-columns: 1fr; }
}