:root {
  --ink: #0d0f0f;
  --panel: #141817;
  --panel-raised: #191e1c;
  --line: #343c38;
  --muted: #8f9994;
  --paper: #e8e4d8;
  --amber: #ffb000;
  --amber-dim: #6b4b09;
  --red: #ff4d3d;
  --mint: #9effc7;
  --mono: "SFMono-Regular", "Roboto Mono", monospace;
  --display: "Avenir Next Condensed", "DIN Condensed", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--paper);
  background:
    radial-gradient(circle at 77% 8%, rgba(255, 176, 0, 0.09), transparent 27rem),
    linear-gradient(145deg, #111413, var(--ink) 54%);
  font-family: var(--mono);
}

.grain {
  position: fixed;
  z-index: -1;
  inset: 0;
  opacity: 0.08;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.8'/%3E%3C/svg%3E");
}

.masthead,
main {
  width: min(1500px, calc(100% - 48px));
  margin-inline: auto;
}

.masthead {
  display: flex;
  align-items: end;
  justify-content: space-between;
  min-height: 260px;
  padding: 52px 0 34px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
label span,
.status-card span {
  color: var(--amber);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

h1 {
  max-width: 850px;
  margin: 12px 0 0;
  color: var(--paper);
  font-family: var(--display);
  font-size: clamp(56px, 8vw, 118px);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.78;
  text-transform: uppercase;
}

h1 span {
  color: transparent;
  -webkit-text-stroke: 1px var(--amber);
}

.system-clock {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 7px;
  text-align: right;
}

.system-clock strong {
  display: block;
  font-size: 24px;
  letter-spacing: 0.08em;
}

.system-clock small {
  color: var(--muted);
  font-size: 9px;
}

.pulse {
  width: 9px;
  height: 9px;
  background: var(--mint);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(158, 255, 199, 0.5);
  animation: pulse 2s infinite;
}

main {
  padding: 28px 0 80px;
}

.control-strip {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 2fr auto;
  gap: 12px;
  align-items: end;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
}

label span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  color: var(--paper);
  background: #0f1211;
  border: 1px solid var(--line);
  border-radius: 0;
  font: inherit;
}

input,
select {
  height: 42px;
  padding: 0 12px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 1px solid var(--amber);
  border-color: var(--amber);
}

.button {
  min-height: 42px;
  padding: 0 17px;
  color: var(--paper);
  background: #242a27;
  border: 1px solid #404a45;
  font: 700 11px var(--mono);
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: 160ms ease;
}

.button:hover {
  color: var(--ink);
  background: var(--paper);
  transform: translateY(-2px);
}

.button.primary {
  color: var(--ink);
  background: var(--amber);
  border-color: var(--amber);
}

.button.danger {
  color: white;
  background: var(--red);
  border-color: var(--red);
}

.button.ghost {
  background: transparent;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 18px 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.status-card {
  min-height: 136px;
  padding: 22px;
  background: rgba(20, 24, 23, 0.8);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.status-card strong {
  display: block;
  margin: 18px 0 7px;
  font-family: var(--display);
  font-size: 30px;
  letter-spacing: -0.03em;
}

.status-card small {
  color: var(--muted);
}

.status-card.critical {
  background:
    repeating-linear-gradient(-45deg, transparent, transparent 10px, rgba(255, 77, 61, 0.04) 10px, rgba(255, 77, 61, 0.04) 20px),
    var(--panel);
}

.status-card.critical span,
.status-card.critical strong {
  color: var(--red);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(320px, 0.7fr);
  gap: 18px;
}

.editor-panel,
.rail-panel,
.output-panel {
  background: var(--panel);
  border: 1px solid var(--line);
}

.editor-panel {
  padding: 24px;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.panel-heading > div {
  display: flex;
  align-items: center;
  gap: 12px;
}

.panel-heading.compact {
  padding: 18px 18px 12px;
  margin: 0;
  border-bottom: 1px solid var(--line);
}

.section-number {
  color: var(--amber);
  font-size: 12px;
}

h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 22px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.text-button {
  padding: 0;
  color: var(--amber);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--amber-dim);
  font: 700 10px var(--mono);
  letter-spacing: 0.08em;
  cursor: pointer;
}

.text-button.warning {
  color: var(--red);
  border-color: var(--red);
}

textarea {
  min-height: 590px;
  resize: vertical;
  padding: 18px;
  color: #cfe9d9;
  font-size: 12px;
  line-height: 1.65;
  tab-size: 2;
}

.action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.rail {
  display: grid;
  gap: 18px;
  align-content: start;
}

.stack {
  max-height: 355px;
  overflow: auto;
}

.stack.empty {
  padding: 24px 18px;
  color: var(--muted);
}

.stack-item {
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
}

.stack-item strong,
.stack-item small {
  display: block;
}

.stack-item strong {
  font-size: 11px;
}

.stack-item small {
  margin-top: 7px;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.5;
}

.stack-item.selected {
  box-shadow: inset 3px 0 var(--amber);
  background: var(--panel-raised);
}

.output-panel {
  margin-top: 18px;
}

pre {
  min-height: 160px;
  max-height: 460px;
  overflow: auto;
  margin: 0;
  padding: 20px;
  color: var(--mint);
  background: #0a0c0b;
  font: 11px/1.65 var(--mono);
  white-space: pre-wrap;
}

@keyframes pulse {
  70% { box-shadow: 0 0 0 9px rgba(158, 255, 199, 0); }
  100% { box-shadow: 0 0 0 0 rgba(158, 255, 199, 0); }
}

@media (max-width: 980px) {
  .masthead {
    min-height: 210px;
  }

  .system-clock {
    display: none;
  }

  .control-strip {
    grid-template-columns: 1fr 1fr;
  }

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

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

@media (max-width: 600px) {
  .masthead,
  main {
    width: min(100% - 24px, 1500px);
  }

  .control-strip,
  .status-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 54px;
  }
}