:root {
  color-scheme: dark;
  --bg: #071018;
  --surface: #0c1823;
  --surface-raised: #102230;
  --line: rgba(165, 214, 232, 0.16);
  --line-strong: rgba(165, 214, 232, 0.29);
  --text: #eef8fb;
  --muted: #91aab5;
  --cyan: #59c7ff;
  --mint: #7df9c5;
  --amber: #f5c86c;
  --danger: #ff8f8f;
  --radius: 18px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 18% -10%, rgba(48, 139, 173, 0.20), transparent 34rem),
    linear-gradient(150deg, #071018 0%, #09131d 48%, #060d14 100%);
}

button,
input,
select {
  font: inherit;
}

.masthead,
footer {
  width: min(1420px, calc(100% - 48px));
  margin: 0 auto;
}

.masthead {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #061019;
  background: var(--mint);
  border-radius: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-weight: 900;
  box-shadow: 0 0 30px rgba(125, 249, 197, 0.20);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  letter-spacing: 0.16em;
  font-size: 0.88rem;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.76rem;
}

.runtime-state {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 0.82rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 14px currentColor;
}

.status-dot[data-state="ready"] {
  background: var(--mint);
}

.status-dot[data-state="working"] {
  background: var(--cyan);
  animation: pulse 1s ease-in-out infinite;
}

.status-dot[data-state="error"] {
  background: var(--danger);
}

.workspace {
  width: min(1420px, calc(100% - 48px));
  min-height: calc(100vh - 168px);
  margin: 0 auto;
  padding: 54px 0 44px;
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(560px, 1.28fr);
  gap: clamp(32px, 6vw, 92px);
  align-items: start;
}

.control-panel {
  padding-top: 12px;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--mint);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 12ch;
  margin-bottom: 20px;
  font-size: clamp(2.5rem, 5vw, 4.8rem);
  font-weight: 560;
  letter-spacing: -0.055em;
  line-height: 0.99;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(1.4rem, 2vw, 2rem);
  font-weight: 560;
  letter-spacing: -0.035em;
}

.lede {
  max-width: 56ch;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

form {
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  gap: 18px;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.field-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

label,
.field-heading output {
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.035em;
}

.field-heading output {
  color: var(--mint);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--mint);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  margin-top: -7px;
  color: #607b87;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.64rem;
}

select {
  min-height: 46px;
  padding: 0 42px 0 14px;
  color: var(--text);
  background: var(--surface-raised);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
}

button {
  grid-column: 1 / -1;
  min-height: 54px;
  margin-top: 5px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #061019;
  background: var(--mint);
  border: 0;
  border-radius: 11px;
  cursor: pointer;
  font-weight: 750;
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(125, 249, 197, 0.18);
}

button:focus-visible,
select:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

button:disabled {
  cursor: wait;
  opacity: 0.46;
}

.capabilities {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.capability-label {
  color: var(--muted);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

#capability-list {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}

.capability {
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.65rem;
}

.capability.enabled {
  color: var(--mint);
  border-color: rgba(125, 249, 197, 0.27);
  background: rgba(125, 249, 197, 0.06);
}

.result-panel {
  overflow: hidden;
  background: rgba(12, 24, 35, 0.84);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(14px);
}

.result-heading {
  padding: 24px 26px 21px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.result-heading .eyebrow {
  margin-bottom: 7px;
}

.run-index {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
}

.mesh-frame {
  position: relative;
  min-height: 410px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.012) 1px, transparent 1px),
    #09131c;
  background-size: 24px 24px;
}

#mesh-canvas {
  width: 100%;
  height: 410px;
  display: block;
}

.equation {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 10px 12px;
  color: var(--text);
  background: rgba(7, 16, 24, 0.78);
  border: 1px solid var(--line);
  border-radius: 9px;
  font-family: ui-serif, Georgia, serif;
  text-align: center;
}

.equation span,
.equation small {
  display: block;
}

.equation small {
  margin-top: 3px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.57rem;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metrics article {
  min-width: 0;
  padding: 18px;
  border-right: 1px solid var(--line);
}

.metrics article:last-child {
  border-right: 0;
}

.metrics span,
.metrics strong {
  display: block;
}

.metrics span {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.metrics strong {
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(0.92rem, 1.4vw, 1.15rem);
  text-overflow: ellipsis;
}

.console-panel {
  padding: 16px 24px 20px;
}

.console-panel summary {
  color: var(--muted);
  cursor: pointer;
  font-size: 0.75rem;
}

.console-panel pre {
  max-height: 150px;
  overflow: auto;
  margin: 14px 0 0;
  color: #a9c7d2;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.68rem;
  line-height: 1.6;
  white-space: pre-wrap;
}

footer {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #67808b;
  border-top: 1px solid var(--line);
  font-size: 0.7rem;
}

@keyframes pulse {
  0%, 100% { opacity: 0.55; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.2); }
}

@media (max-width: 960px) {
  .workspace {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  h1 {
    max-width: 15ch;
  }
}

@media (max-width: 620px) {
  .masthead,
  .workspace,
  footer {
    width: min(100% - 28px, 1420px);
  }

  .masthead {
    min-height: 78px;
  }

  .runtime-state {
    max-width: 145px;
    justify-content: flex-end;
    text-align: right;
  }

  .workspace {
    padding-top: 32px;
  }

  h1 {
    font-size: clamp(2.35rem, 13vw, 3.4rem);
  }

  form,
  .metrics {
    grid-template-columns: 1fr 1fr;
  }

  .metrics article:nth-child(2) {
    border-right: 0;
  }

  .metrics article:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .mesh-frame,
  #mesh-canvas {
    min-height: 320px;
    height: 320px;
  }

  footer {
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}