:root {
  --bg: #070a0f;
  --bg-grad-top: #0d141d;
  --panel: #111821;
  --panel-elev: #16202c;
  --panel-input: #0a1018;

  --line: #1f3142;
  --line-bright: #2d4a66;

  --cyan: #5fb8e8;
  --cyan-bright: #8ed1f4;
  --cyan-dim: #2b6c95;
  --cyan-glow: rgba(95, 184, 232, 0.22);
  --cyan-glow-strong: rgba(95, 184, 232, 0.38);

  --amber: #ffa84a;
  --amber-dim: #b8742a;
  --amber-glow: rgba(255, 168, 74, 0.18);

  --green-pip: #57c785;
  --green-pip-dim: #2a6b46;
  --green-glow: rgba(87, 199, 133, 0.16);

  --text: #d8e3ec;
  --text-dim: #6c8398;
  --text-fade: #4d6478;

  --error: #ff5d5d;
  --error-glow: rgba(255, 93, 93, 0.18);

  --font-chrome: "Roboto Condensed", "Arial Narrow", "Helvetica Neue Condensed",
                 "Liberation Sans Narrow", -apple-system, BlinkMacSystemFont,
                 "Segoe UI", sans-serif;
  --font-readout: "JetBrains Mono", "SF Mono", "Consolas",
                  "Liberation Mono", ui-monospace, monospace;

  --track: 0.14em;
  --track-tight: 0.06em;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-chrome);
  font-size: 14px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

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

.terminal {
  position: relative;
  min-height: 100vh;
  padding: 1.25rem clamp(1rem, 3vw, 2rem) 2rem;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, var(--bg-grad-top) 0%, transparent 70%),
    linear-gradient(180deg, var(--bg) 0%, #050709 100%);
  overflow: hidden;
}

/* faint scanline overlay — sits above content, blocks no clicks */
.terminal::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 2px,
    rgba(255, 255, 255, 0.014) 2px,
    rgba(255, 255, 255, 0.014) 3px
  );
  z-index: 1000;
  mix-blend-mode: screen;
}

/* corner ambient glow */
.terminal::after {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 40%;
  background: radial-gradient(ellipse, var(--cyan-glow) 0%, transparent 60%);
  pointer-events: none;
  opacity: 0.5;
  z-index: 0;
}

.shell {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
}

/* ---------- top bar ---------- */

.top-bar {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding: 0.5rem 0.5rem 0.75rem;
  margin: 0 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.top-bar::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-bright), transparent);
  box-shadow: 0 0 8px var(--cyan-glow-strong);
}

.top-bar h1 {
  margin: 0;
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: var(--track);
  text-transform: uppercase;
  color: var(--cyan-bright);
  text-shadow: 0 0 12px var(--cyan-glow-strong);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.top-bar h1::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green-pip);
  box-shadow: 0 0 8px var(--green-pip), 0 0 2px #fff inset;
  flex-shrink: 0;
}

.top-bar h1::after {
  content: 'SUPPLY COMPUTER';
  font-size: 0.7rem;
  letter-spacing: var(--track);
  color: var(--text-dim);
  margin-left: 0.75rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--line);
  text-shadow: none;
}

/* ---------- site nav (outbound, no dead ends) ---------- */

.site-nav {
  margin-left: auto;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: var(--track);
  text-transform: uppercase;
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--line);
  transition: all 120ms ease;
}

.site-nav a:hover {
  color: var(--cyan-bright);
  border-color: var(--cyan-dim);
  background: rgba(95, 184, 232, 0.06);
  box-shadow: 0 0 8px var(--cyan-glow);
}

/* ---------- panels ---------- */

.panels {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel {
  position: relative;
  background:
    linear-gradient(180deg, rgba(95, 184, 232, 0.03) 0%, transparent 12%),
    var(--panel);
  border: 1px solid var(--line);
  padding: 1rem 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

/* top accent bar — thin cyan stripe across each panel */
.panel::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-dim), var(--cyan) 30%, var(--cyan-bright) 50%, var(--cyan) 70%, var(--cyan-dim));
  box-shadow: 0 0 8px var(--cyan-glow);
}

/* corner bracket bottom-right */
.panel::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: 14px;
  height: 14px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  opacity: 0.7;
  pointer-events: none;
}

.panel h2 {
  margin: 0 0 0.25rem;
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: var(--track);
  text-transform: uppercase;
  color: var(--cyan-bright);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}

.panel h2::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--cyan);
  box-shadow: 0 0 6px var(--cyan-glow-strong);
  flex-shrink: 0;
  transform: rotate(45deg);
}

.lead {
  color: var(--text-dim);
  font-size: 0.82rem;
  letter-spacing: var(--track-tight);
  margin: 0;
  line-height: 1.5;
}

/* ---------- labels & inputs ---------- */

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: var(--track-tight);
  text-transform: uppercase;
}

input[type="number"],
select {
  background: var(--panel-input);
  color: var(--cyan-bright);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0.45rem 0.55rem;
  font-family: var(--font-readout);
  font-size: 0.85rem;
  letter-spacing: var(--track-tight);
  outline: none;
  min-width: 200px;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

select {
  font-family: var(--font-chrome);
  text-transform: uppercase;
  letter-spacing: var(--track-tight);
  font-size: 0.82rem;
  cursor: pointer;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--cyan) 50%),
                    linear-gradient(135deg, var(--cyan) 50%, transparent 50%);
  background-position: calc(100% - 14px) 50%, calc(100% - 9px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
  padding-right: 1.6rem;
}

input:focus, select:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan-glow), 0 0 12px var(--cyan-glow);
}

/* ---------- controls row ---------- */

.controls {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: flex-end;
}

/* ---------- headline stats ---------- */

.headline {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.stat {
  flex: 1;
  min-width: 150px;
  border-left: 2px solid var(--cyan-dim);
  padding: 0.1rem 0 0.1rem 0.7rem;
}

.stat .n {
  font-family: var(--font-readout);
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--cyan-bright);
  text-shadow: 0 0 12px var(--cyan-glow);
  line-height: 1.1;
}

.stat .l {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: var(--track);
  margin-top: 0.2rem;
}

/* ---------- table ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

th, td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--line);
}

th {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: var(--track);
  font-weight: 500;
}

td {
  font-family: var(--font-readout);
  letter-spacing: var(--track-tight);
}

td.num, th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.plots {
  font-weight: 600;
  color: var(--cyan-bright);
  text-shadow: 0 0 6px var(--cyan-glow);
}

.dim { color: var(--text-fade); }

/* ---------- tags ---------- */

.tag {
  font-family: var(--font-chrome);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: var(--track-tight);
  padding: 0.12rem 0.5rem;
  border: 1px solid transparent;
  white-space: nowrap;
}

.tag.limit {
  background: var(--amber-glow);
  border-color: var(--amber-dim);
  color: var(--amber);
}

.tag.ok {
  background: var(--green-glow);
  border-color: var(--green-pip-dim);
  color: var(--green-pip);
}

/* ---------- note ---------- */

.note {
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: var(--track-tight);
  line-height: 1.5;
  margin-top: 0.4rem;
  padding-left: 0.65rem;
  position: relative;
}

.note::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 1px;
  background: var(--cyan-dim);
}

.note b { color: var(--cyan-bright); font-weight: 600; }

.warn { color: var(--amber); }
.warn b { color: var(--amber); }

/* ---------- reference (collapsible) ---------- */

details.ref {
  position: relative;
  background:
    linear-gradient(180deg, rgba(95, 184, 232, 0.03) 0%, transparent 12%),
    var(--panel);
  border: 1px solid var(--line);
}

details.ref::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-dim), var(--cyan) 30%, var(--cyan-bright) 50%, var(--cyan) 70%, var(--cyan-dim));
  box-shadow: 0 0 8px var(--cyan-glow);
}

details.ref summary {
  cursor: pointer;
  padding: 0.85rem 1rem;
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--track);
  color: var(--cyan-bright);
  list-style: none;
  user-select: none;
}

details.ref summary::-webkit-details-marker { display: none; }
details.ref summary::before { content: '▸ '; color: var(--cyan); }
details.ref[open] summary::before { content: '▾ '; }

details.ref .body {
  padding: 0 1rem 1.1rem;
  overflow-x: auto;
}

details.ref h3 {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: var(--track);
  margin: 1.1rem 0 0.3rem;
  font-weight: 500;
}

details.ref table { font-size: 0.8rem; }
details.ref td, details.ref th { padding: 0.4rem 0.55rem; white-space: nowrap; }

/* ---------- footer ---------- */

footer {
  color: var(--text-fade);
  font-size: 0.74rem;
  letter-spacing: var(--track-tight);
  line-height: 1.6;
  margin-top: 1rem;
  padding: 0.75rem 0.5rem;
  border-top: 1px solid var(--line);
}

footer code {
  font-family: var(--font-readout);
  color: var(--cyan);
}

/* ---------- responsive ---------- */

@media (max-width: 600px) {
  .top-bar h1::after { display: none; }
  .controls { flex-direction: column; align-items: stretch; }
  input[type="number"], select { min-width: 0; width: 100%; }
}