/* Dark, high contrast, and resizable. The type is deliberately larger than a
 * typical marketing page: this is a tool, read closely, sometimes by someone
 * who needs it big. Every size is in rem so browser zoom and a user font size
 * both work properly. */
:root {
  --bg: #101319;
  --panel: #1a1f2b;
  --line: #333c4f;
  --ink: #f2f5fa;
  --dim: #b9c3d6;
  --accent: #4fa3ff;
  --warn: #ffb300;
  --bad: #ff8f8f;
  --ok: #7ee787;
}
* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.55;
}
header, main, footer { max-width: 62rem; margin: 0 auto; padding: 0 1.2rem; }
header { padding-top: 2.5rem; }
h1 { font-size: 2.4rem; margin: 0; letter-spacing: -0.02em; }
h2 { font-size: 1.35rem; margin: 2rem 0 .4rem; overflow-wrap: anywhere; }
.tagline { font-size: 1.2rem; margin: .3rem 0 .2rem; }
.sub { color: var(--dim); margin: .2rem 0 1rem; }
.hint { color: var(--dim); font-size: .95rem; }
.warn { color: var(--warn); }
code { background: var(--panel); padding: .1rem .35rem; border-radius: 4px; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, select:focus-visible,
#drop:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

/* -- drop target -- */
#drop {
  border: 2px dashed var(--line);
  border-radius: 12px;
  background: var(--panel);
  padding: 3rem 1.5rem;
  text-align: center;
  margin: 1.5rem 0;
  cursor: pointer;
  transition: border-color .12s, background .12s;
}
#drop.over { border-color: var(--accent); background: #1f2939; }
#drop .big { font-size: 1.5rem; margin: 0 0 .4rem; }
#boot { margin: 1rem 0 0; }
#boot.ready { color: var(--ok); }

/* -- controls -- */
button, select {
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
  background: #232a38;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .45rem .8rem;
  cursor: pointer;
}
button:hover, select:hover { background: #2c3547; }
button.primary { background: #1d4e82; border-color: var(--accent); }
button.primary:hover { background: #245d99; }
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-items: center;
  margin: 1rem 0 .5rem;
}
.controls label { color: var(--dim); font-size: .95rem; }
#structure { max-width: min(100%, 30rem); }

/* -- output -- */
#view-wrap {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg);
}
#view { width: 100%; height: min(78vh, 46rem); border: 0; display: block; }
pre {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  font-size: .95rem;
  line-height: 1.45;
}
details { margin: 1rem 0; }
summary { cursor: pointer; color: var(--accent); padding: .3rem 0; }

#error {
  border: 1px solid var(--bad);
  border-left-width: 5px;
  border-radius: 8px;
  padding: .2rem 1.1rem 1rem;
  margin: 1.5rem 0;
  background: #241a1d;
}
#error h2 { color: var(--bad); }
#busy { color: var(--dim); margin: 1.5rem 0; }

footer {
  border-top: 1px solid var(--line);
  margin-top: 3.5rem;
  padding-top: 1.2rem;
  padding-bottom: 3rem;
  font-size: .95rem;
}

@media (max-width: 34rem) {
  html { font-size: 16px; }
  h1 { font-size: 2rem; }
  #drop { padding: 2rem 1rem; }
}

/* The MCDDD hand-off report, sized like the 3D view. */
#handoff-wrap {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  margin-bottom: 1rem;
}
#handoff-report { width: 100%; height: min(70vh, 40rem); border: 0; display: block; }
#handoff { border-left: 4px solid var(--accent); padding-left: 1rem; }