:root {
  --bg: #12151a;
  --fg: #e8e6e1;
  --muted: #9a968c;
  --panel: #1c2129;
  --accent: #c4a35a;
  --mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
  --sans: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, #2a3340 0%, transparent 55%),
    var(--bg);
  color: var(--fg);
  font-family: var(--sans);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

header h1 {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

#canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #0a0c0f;
  border: 1px solid #2e3642;
}

.controls {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  background: var(--panel);
  border: 1px solid #2e3642;
  display: grid;
  gap: 1rem;
}

.row {
  display: grid;
  gap: 1rem;
}

@media (min-width: 560px) {
  .row {
    grid-template-columns: 1fr 1fr;
    align-items: end;
  }
}

label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

select,
input[type="file"] {
  font: inherit;
  font-size: 1rem;
  text-transform: none;
  letter-spacing: 0;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid #3a4452;
  padding: 0.55rem 0.7rem;
  max-width: 100%;
}

input[type="file"] {
  font-size: 0.85rem;
  cursor: pointer;
}

input[type="file"]::file-selector-button {
  font: inherit;
  font-size: 0.85rem;
  margin-right: 0.75rem;
  padding: 0.25rem 0.55rem;
  color: var(--fg);
  background: #2a3340;
  border: 1px solid #3a4452;
  cursor: pointer;
}

.meta {
  display: grid;
  gap: 0.45rem;
  font-size: 0.9rem;
}

.k {
  color: var(--muted);
  display: inline-block;
  min-width: 3.5rem;
}

code {
  font-family: var(--mono);
  font-size: 0.78rem;
  word-break: break-all;
  color: var(--accent);
}

#status {
  color: var(--fg);
}