:root {
  --bg: #f4f1eb;
  --ink: #1c1a17;
  --muted: #5c574f;
  --line: #d9d2c6;
  --paper: #fffcf7;
  --accent: #2f4f4a;
  --accent-ink: #f4f1eb;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.45 "Segoe UI", system-ui, sans-serif;
}

header,
main {
  width: min(720px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  padding: 28px 0 12px;
}

.kicker {
  margin: 0 0 6px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--muted);
}

h1,
h2 {
  margin: 0 0 8px;
  font-weight: 620;
  letter-spacing: -0.02em;
}

.lede {
  margin: 0;
  color: var(--muted);
}

.viewer-wrap {
  margin-top: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  overflow: hidden;
}

model-viewer {
  display: block;
  width: 100%;
  height: min(62vh, 520px);
  background: #ece7de;
}

.hint {
  margin: 0;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.actions {
  display: flex;
  gap: 10px;
  margin: 16px 0 28px;
}

.btn {
  appearance: none;
  border: 0;
  cursor: pointer;
  padding: 12px 16px;
  font: inherit;
  text-decoration: none;
}

.btn-primary,
.btn-ar {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.preview {
  padding-bottom: 40px;
}

.preview img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  background: var(--paper);
}