:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c232d;
  --ink: #e6edf3;
  --muted: #8b949e;
  --accent: #2f81f7;
  --accent-2: #d8643a;
  --ok: #3fb950;
  --warn: #d29922;
  --line: #2a3038;
}
* { box-sizing: border-box; }
/* The [hidden] attribute must win over components that set display (e.g. the
   overlay's display:flex), otherwise hiding them silently does nothing. */
[hidden] { display: none !important; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--ink); }

.topbar {
  display: flex; align-items: center; gap: 22px; padding: 12px 22px;
  border-bottom: 1px solid var(--line); background: var(--panel); position: sticky; top: 0; z-index: 500;
}
.brand { font-weight: 800; color: var(--ink); text-decoration: none; font-size: 18px; }
.steps { list-style: none; display: flex; gap: 8px; margin: 0; padding: 0; }
.steps li {
  font-size: 14px; color: var(--muted); padding: 6px 14px; border-radius: 999px; cursor: pointer;
  border: 1px solid transparent; white-space: nowrap;
}
.steps li:hover { color: var(--ink); }
.steps li.active { color: var(--ink); background: var(--panel-2); border-color: var(--line); font-weight: 600; }
.steps li.done { color: var(--ok); }

.step { animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.wrap { max-width: 1080px; margin: 0 auto; padding: 22px; }

/* --- Step 1: map + settings --- */
.searchbar { display: flex; gap: 10px; margin-bottom: 12px; }
.searchbar input { flex: 1; padding: 13px 16px; font-size: 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel-2); color: var(--ink); }
.searchbar button, .step-actions button, .downloads button {
  padding: 13px 20px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel-2);
  color: var(--ink); cursor: pointer; font-size: 15px;
}
.searchbar button:hover { border-color: var(--accent); }
.map-big { height: 56vh; min-height: 360px; border-radius: 14px; overflow: hidden; border: 1px solid var(--line); }
.hint { font-size: 13px; color: var(--muted); margin: 10px 2px; }
.inline-msg { margin-left: 8px; }
.inline-msg.err { color: var(--accent-2); }
.inline-msg.ok { color: var(--ok); }

.settings-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 28px; margin: 18px 0; }
.settings-grid label { display: block; font-size: 13px; color: var(--muted); }
input[type=range] { width: 100%; accent-color: var(--accent); margin-top: 6px; }
.settings-grid input[type=text], .settings-grid input[type=file], .settings-grid select {
  width: 100%; margin-top: 6px; padding: 10px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--ink); font-size: 14px;
}
.check { display: flex; align-items: center; gap: 8px; color: var(--ink); font-size: 14px; }
.field .lbl { font-size: 13px; color: var(--muted); display: block; }
.field.span2 { grid-column: 1 / -1; }
.fixed-val { font-size: 16px; font-weight: 600; color: var(--ink); margin: 7px 0 2px; }
.fixed-val .muted { font-weight: 400; font-size: 13px; color: var(--muted); }
.presets { display: flex; gap: 10px; margin: 8px 0 2px; }
.presets button {
  flex: 1; padding: 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--ink); cursor: pointer; font-size: 15px;
}
.presets button:hover { border-color: var(--accent); }
.presets button.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; }
.help { display: block; font-size: 12px; color: var(--muted); margin-top: 3px; line-height: 1.4; }
.side .help { margin-top: 2px; margin-bottom: 4px; }

.step-actions { display: flex; align-items: center; gap: 14px; margin-top: 18px; }
.step-actions.col { flex-direction: column; align-items: stretch; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; }
button.primary:hover { filter: brightness(1.08); }
button:disabled { opacity: .5; cursor: not-allowed; }
.status { font-size: 14px; color: var(--muted); }
.status.err { color: var(--accent-2); }
.status.ok { color: var(--ok); }

/* --- Steps 2 & 3: preview layout --- */
.preview-layout { display: grid; grid-template-columns: 1fr 340px; gap: 0; height: calc(100vh - 57px); }
.viewer-shell { position: relative; }
.viewer { width: 100%; height: 100%;
  background:
    radial-gradient(120% 90% at 50% 18%, #243244 0%, #131a23 55%, #0b0e12 100%);
}
.viewer canvas { display: block; }
/* Big centered loading overlay — shows while generating, hides when done. */
.overlay.big {
  position: absolute; inset: 0; display: flex; flex-direction: column; gap: 18px;
  align-items: center; justify-content: center; pointer-events: none;
  background: rgba(10,13,18,.35);
}
.overlay .spinner {
  width: 64px; height: 64px; border: 5px solid rgba(255,255,255,.15);
  border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite;
}
.overlay .ov-text { font-size: 20px; color: var(--ink); letter-spacing: .3px; }
@keyframes spin { to { transform: rotate(360deg); } }
.side { border-left: 1px solid var(--line); background: var(--panel); padding: 18px; overflow-y: auto; }
.side h3 { margin: 0 0 14px; font-size: 16px; }
.side label { display: block; font-size: 13px; color: var(--muted); margin: 14px 0 4px; }
.report { font-size: 13px; color: var(--muted); }
.report .grid { display: grid; grid-template-columns: 1fr auto; gap: 6px 14px; margin-bottom: 8px; }
.report b { color: var(--ink); }
.report .w { color: var(--warn); margin-top: 6px; }
.downloads { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.dl { padding: 11px 16px; border-radius: 9px; border: 1px solid var(--line); text-decoration: none; color: var(--ink); font-size: 14px; }
.dl:hover { border-color: var(--accent); }

@media (max-width: 860px) {
  .settings-grid { grid-template-columns: 1fr; }
  .preview-layout { grid-template-columns: 1fr; height: auto; }
  .viewer-shell { height: 60vh; }
  .steps li { padding: 6px 10px; font-size: 12px; }
}