:root {
  --bg: #171415;
  --panel: rgba(24, 21, 22, 0.82);
  --paper: #f1ece7;
  --muted: rgba(241, 236, 231, 0.64);
  --faint: rgba(241, 236, 231, 0.34);
  --line: rgba(241, 236, 231, 0.14);
  --line-strong: rgba(241, 236, 231, 0.28);
  --oxide: #8f220e;
  --oxide-2: #b43a19;
  --amber: #ffb454;
  --cyan: #5af0ff;
  --green: #6ee7b7;
  --font-sans: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body {
  color: var(--paper);
  font-family: var(--font-sans);
  background:
    linear-gradient(rgba(241, 236, 231, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(241, 236, 231, 0.024) 1px, transparent 1px),
    radial-gradient(900px 640px at 48% -16%, rgba(143, 34, 14, 0.24), transparent 66%),
    linear-gradient(180deg, #2a2526 0%, #211d1f 48%, var(--bg) 100%);
  background-size: 36px 36px, 36px 36px, auto, auto;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.45; }

.app-shell { min-height: 100vh; padding: 28px; }
.topbar,
.layout { max-width: 1480px; margin: 0 auto; }
.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand-mark {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(241, 236, 231, 0.04);
}
.brand-mark::before {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid var(--oxide-2);
  transform: rotate(45deg);
}

.kicker,
.micro,
.field-label,
.step-k,
.path {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand h1 {
  margin: 4px 0 0;
  font-size: clamp(30px, 5vw, 64px);
  line-height: 0.96;
  letter-spacing: 0;
}

.actions,
.output-actions { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; }
.btn {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  color: var(--paper);
  background: rgba(241, 236, 231, 0.045);
  transition: transform 180ms var(--ease), background 180ms var(--ease), border-color 180ms var(--ease);
}
.btn:hover { transform: translateY(-1px); border-color: rgba(241, 236, 231, 0.36); }
.btn.primary { background: var(--oxide); border-color: rgba(180, 58, 25, 0.82); }
.btn.primary:hover { background: var(--oxide-2); }

.layout {
  display: grid;
  grid-template-columns: minmax(570px, 1.15fr) minmax(390px, 0.85fr);
  gap: 18px;
}

.stage,
.panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.24);
}

.stage {
  min-height: calc(100vh - 116px);
  display: grid;
  grid-template-rows: auto 1fr auto;
  overflow: hidden;
}

.stage-head {
  padding: 24px;
  border-bottom: 1px solid rgba(241, 236, 231, 0.08);
}
.stage-head h2 {
  margin: 8px 0 0;
  max-width: 790px;
  font-size: clamp(38px, 5.5vw, 72px);
  line-height: 0.92;
  letter-spacing: 0;
}
.stage-head p {
  margin: 12px 0 0;
  color: var(--muted);
  max-width: 720px;
  font-size: 15px;
  line-height: 1.45;
}

.field {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  min-height: 560px;
  background:
    linear-gradient(rgba(241, 236, 231, 0.023) 1px, transparent 1px),
    linear-gradient(90deg, rgba(241, 236, 231, 0.023) 1px, transparent 1px);
  background-size: 34px 34px;
}
.field::before {
  content: "";
  position: absolute;
  width: min(102vw, 900px);
  aspect-ratio: 1;
  top: 18px;
  border: 1px solid rgba(241, 236, 231, 0.055);
  border-radius: 50%;
  transform: translateY(18%);
}

.trace {
  width: min(100%, 980px);
  height: min(100%, 690px);
  min-height: 520px;
  overflow: visible;
  touch-action: none;
  user-select: none;
}

.instrument { cursor: default; }
.orbit { transition: transform 680ms var(--ease); }
.ring,
.spoke {
  fill: none;
  stroke: rgba(241, 236, 231, 0.082);
  stroke-width: 1;
}
.spoke { stroke: rgba(241, 236, 231, 0.055); }
.reveal-ring { stroke: rgba(241, 236, 231, 0.13); }

.line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.line.committed {
  stroke: rgba(241, 236, 231, 0.58);
  stroke-width: 3.1;
}
.line.live {
  stroke: var(--oxide-2);
  stroke-width: 3.6;
  stroke-dasharray: 8 8;
}
.closed {
  fill: rgba(180, 58, 25, 0.15);
  stroke: var(--paper);
  stroke-width: 2.7;
}

.port {
  fill: #171415;
  stroke: rgba(241, 236, 231, 0.36);
  stroke-width: 1.4;
}
.port.active {
  fill: var(--oxide-2);
  stroke: var(--paper);
}
.port-label {
  fill: rgba(241, 236, 231, 0.58);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
}
.reveal-label { font-size: 8px; letter-spacing: 0.1em; }

.option-port {
  cursor: pointer;
  outline: none;
}
.option-port:focus .option-glyph,
.option-port:hover .option-glyph {
  stroke: var(--paper);
  stroke-width: 2.2;
  transform: scale(1.07);
}
.option-glyph {
  fill: color-mix(in srgb, var(--option-color), transparent 22%);
  stroke: rgba(241, 236, 231, 0.52);
  stroke-width: 1.45;
  filter: url(#soft-shadow);
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 180ms var(--ease), stroke 180ms var(--ease), fill 180ms var(--ease);
}
.option-glyph.predicted {
  stroke: var(--amber);
  stroke-width: 2.2;
  filter: drop-shadow(0 0 18px color-mix(in srgb, var(--option-color), transparent 50%));
}
.other-port { stroke-dasharray: 2 3; }
.bubble-num {
  fill: #171415;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  pointer-events: none;
}
.bubble-label {
  fill: rgba(241, 236, 231, 0.73);
  font-family: var(--font-mono);
  font-size: 8.2px;
  letter-spacing: 0.08em;
  pointer-events: none;
}

.handle {
  cursor: grab;
  outline: none;
}
.handle:active { cursor: grabbing; }
.handle-halo {
  fill: rgba(180, 58, 25, 0.16);
  stroke: rgba(255, 180, 84, 0.32);
  stroke-width: 1.2;
  stroke-dasharray: 3 5;
  animation: breathe 1.8s var(--ease) infinite;
}
.origin {
  fill: var(--paper);
  stroke: var(--oxide-2);
  stroke-width: 3;
}
@keyframes breathe {
  0%, 100% { opacity: 0.6; transform: scale(0.92); transform-origin: center; }
  50% { opacity: 1; transform: scale(1.08); transform-origin: center; }
}

.shape-name {
  position: absolute;
  left: 24px;
  bottom: 22px;
  display: grid;
  gap: 4px;
  pointer-events: none;
}
.shape-name strong {
  font-size: clamp(30px, 4vw, 50px);
  line-height: 0.96;
}

.stage-foot {
  padding: 16px 24px 20px;
  border-top: 1px solid rgba(241, 236, 231, 0.08);
}
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.step {
  min-width: 0;
  text-align: left;
  border: 1px solid rgba(241, 236, 231, 0.12);
  border-radius: 8px;
  background: rgba(241, 236, 231, 0.025);
  color: var(--paper);
  padding: 10px;
}
.step[data-state="done"] {
  border-color: rgba(180, 58, 25, 0.58);
  background: rgba(143, 34, 14, 0.14);
}
.step[data-state="active"] { border-color: rgba(241, 236, 231, 0.32); }
.step-v {
  margin-top: 4px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.side {
  display: grid;
  gap: 18px;
  align-content: start;
}
.panel { padding: 20px; }
.selection-card {
  width: 100%;
  color: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(241, 236, 231, 0.035);
  padding: 14px;
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 12px;
  align-items: center;
  margin-top: 16px;
}
.choice-index {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}
.choice-title { display: block; font-weight: 700; font-size: 16px; }
.choice-desc { display: block; margin-top: 4px; color: var(--muted); font-size: 13px; line-height: 1.35; }
.predictive-note {
  margin-top: 12px;
  border: 1px solid rgba(255, 180, 84, 0.22);
  border-radius: 8px;
  padding: 10px 11px;
  color: rgba(241, 236, 231, 0.74);
  background: rgba(255, 180, 84, 0.045);
  font-size: 13px;
  line-height: 1.4;
}
.choice-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}
.choice-chip {
  border: 1px solid rgba(241, 236, 231, 0.12);
  border-radius: 8px;
  background: rgba(241, 236, 231, 0.025);
  color: var(--muted);
  padding: 8px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 8px;
  text-align: left;
}
.choice-chip[aria-pressed="true"] {
  color: var(--paper);
  border-color: color-mix(in srgb, var(--option-color), transparent 32%);
  background: color-mix(in srgb, var(--option-color), transparent 88%);
}
.choice-chip.is-predicted {
  border-color: color-mix(in srgb, var(--option-color), transparent 42%);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--option-color), transparent 88%), rgba(241, 236, 231, 0.025));
}
.choice-chip.is-other { border-style: dashed; }
.choice-mark {
  width: 18px;
  height: 18px;
  display: block;
  background: var(--option-color);
}
.shape-circle { border-radius: 50%; }
.shape-square { border-radius: 4px; }
.shape-triangle { clip-path: polygon(50% 3%, 97% 96%, 3% 96%); }
.shape-diamond { clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); }
.shape-hex { clip-path: polygon(25% 4%, 75% 4%, 100% 50%, 75% 96%, 25% 96%, 0 50%); }
.shape-pentagon { clip-path: polygon(50% 0, 98% 38%, 80% 100%, 20% 100%, 2% 38%); }

.summary {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(241, 236, 231, 0.08);
  color: var(--muted);
  line-height: 1.5;
}
.bars { display: grid; gap: 8px; margin-top: 12px; }
.bar {
  display: grid;
  grid-template-columns: 94px 1fr 36px;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
}
.track {
  height: 5px;
  border-radius: 999px;
  background: rgba(241, 236, 231, 0.09);
  overflow: hidden;
}
.fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--oxide-2), var(--amber));
}

.manual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.row { display: grid; gap: 6px; }
.input,
.textarea,
.select {
  width: 100%;
  border: 1px solid rgba(241, 236, 231, 0.13);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.18);
  color: var(--paper);
  min-height: 38px;
  padding: 9px 10px;
  outline: none;
}
.textarea { min-height: 72px; resize: vertical; line-height: 1.4; }
.other-box {
  display: grid;
  gap: 6px;
  margin-top: 12px;
}
.agent-box {
  margin-top: 12px;
  border: 1px solid rgba(241, 236, 231, 0.12);
  border-radius: 8px;
  padding: 12px;
  background: rgba(241, 236, 231, 0.025);
}
.agent-box p { margin: 8px 0 12px; color: var(--muted); line-height: 1.45; }
.preview {
  max-height: 260px;
  overflow: auto;
  margin: 10px 0 0;
  border: 1px solid rgba(241, 236, 231, 0.1);
  border-radius: 8px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.22);
  color: rgba(241, 236, 231, 0.78);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.45;
  white-space: pre-wrap;
}
.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(23, 20, 21, 0.96);
  padding: 11px 14px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}

@media (max-width: 1120px) {
  .layout { grid-template-columns: 1fr; }
  .stage { min-height: 720px; }
}

@media (max-width: 720px) {
  .app-shell { padding: 14px; }
  .topbar { align-items: stretch; flex-direction: column; }
  .actions { justify-content: flex-start; }
  .steps,
  .manual-grid { grid-template-columns: 1fr 1fr; }
  .stage-head h2 { font-size: clamp(34px, 13vw, 58px); }
  .field { min-height: 470px; }
  .trace { min-height: 430px; }
  .bar { grid-template-columns: 84px 1fr 34px; }
}