:root {
  --bg: #f6f1eb;
  --panel: #ffffff;
  --fg: #3b332c;
  --sub: #7d7166;
  --line: #e6ddd2;
  --accent: #a07d5c;
  --accent-fg: #ffffff;
  --radius: 14px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Hiragino Sans", sans-serif;
  line-height: 1.75;
  font-size: 16px;
}
a { color: var(--accent); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

.site-header { padding: 14px 0; }
.brand { font-family: "Zen Maru Gothic", sans-serif; font-weight: 700; font-size: 20px; color: var(--fg); text-decoration: none; }
.brand .tag { font-size: 12px; color: var(--sub); font-weight: 500; }

.hero { text-align: center; padding: 16px 0 24px; }
.hero h1 { font-family: "Zen Maru Gothic", sans-serif; font-size: clamp(24px, 5vw, 36px); line-height: 1.45; margin: 0 0 12px; }
.lead { color: var(--sub); margin: 0; }

.tool { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .tool { grid-template-columns: 1fr 1fr; align-items: start; } }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; min-width: 0; }
.panel-title { font-size: 18px; margin: 0 0 16px; font-family: "Zen Maru Gothic", sans-serif; }

.field { display: block; border: 0; padding: 0; margin: 0 0 18px; min-width: 0; }
.field > span, .field > legend { display: block; font-weight: 700; font-size: 14px; margin-bottom: 6px; padding: 0; }
.sub { display: block; font-size: 12px; color: var(--sub); }
input[type="text"], input[type="email"], select, textarea {
  width: 100%;
  font: inherit;
  font-size: 16px; /* iOSのズーム防止 */
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--fg);
}
textarea { resize: vertical; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.checks { display: flex; flex-wrap: wrap; gap: 8px 16px; }
.checks.col { flex-direction: column; gap: 8px; }
.checks label, .consent { display: flex; gap: 8px; align-items: flex-start; font-size: 15px; }
.checks input, .consent input { margin-top: 6px; accent-color: var(--accent); }
.hint { font-size: 12px; color: var(--sub); margin: 6px 0 0; }
.center { text-align: center; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.seg-btn { font: inherit; font-size: 14px; border: 0; background: #fff; color: var(--fg); padding: 8px 14px; cursor: pointer; }
.seg-btn.is-on { background: var(--accent); color: var(--accent-fg); }
.themes { display: flex; gap: 8px; }
.swatch { width: 32px; height: 32px; border-radius: 50%; border: 2px solid; cursor: pointer; padding: 0; }
.swatch.is-on { outline: 3px solid var(--fg); outline-offset: 2px; }

.preview { background: #efe8df; border-radius: 10px; padding: 12px; display: flex; justify-content: center; }
.preview img { display: block; max-width: 100%; max-height: 70vh; height: auto; border-radius: 6px; box-shadow: 0 4px 16px rgba(0,0,0,.08); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.btn { font: inherit; font-weight: 700; padding: 12px 18px; border-radius: 999px; border: 1px solid var(--accent); background: #fff; color: var(--accent); cursor: pointer; flex: 1 1 auto; }
.btn.primary { background: var(--accent); color: var(--accent-fg); }
.btn:focus-visible, .seg-btn:focus-visible, .swatch:focus-visible { outline: 3px solid #3b332c; outline-offset: 2px; }
.toast { min-height: 1.5em; font-size: 14px; color: var(--accent); margin: 8px 0 0; }

.text-out { margin-top: 8px; }
.text-out summary { cursor: pointer; font-size: 14px; color: var(--sub); }
.text-out pre { white-space: pre-wrap; word-break: break-word; font-family: inherit; font-size: 14px; background: #faf7f3; padding: 12px; border-radius: 8px; }

.survey { margin-top: 16px; border-color: var(--accent); }
.thanks { font-weight: 700; }

.content { max-width: 760px; margin: 40px auto; }
.content h2 { font-family: "Zen Maru Gothic", sans-serif; font-size: 22px; margin-top: 36px; }
.content details { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px 16px; margin-bottom: 8px; }
.content summary { cursor: pointer; font-weight: 700; }
.note { font-size: 13px; color: var(--sub); }

.site-footer { border-top: 1px solid var(--line); padding: 24px 0 40px; font-size: 13px; color: var(--sub); text-align: center; }
.site-footer nav { display: flex; gap: 16px; justify-content: center; margin-bottom: 8px; }

.doc { max-width: 760px; margin: 0 auto 60px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.doc h1 { font-size: 24px; }
.doc h2 { font-size: 18px; margin-top: 28px; }