:root {
  color-scheme: light;
  --ground: #f6f5f1;
  --white: #ffffff;
  --ink: #1a1d23;
  --ink-soft: #454b55;
  --ink-faint: #6b717b;
  --accent: #0f5f5c;
  --accent-dark: #0a4744;
  --accent-pale: #e3ece9;
  --line: #d9d3c7;
  --warn-bg: #fff4df;
  --warn-line: #e8c77f;
  --warn-ink: #6b4200;
  --sans: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic UI', 'Yu Gothic', Meiryo, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0; font-family: var(--sans); font-size: 16px; line-height: 1.8;
  color: var(--ink); background: var(--ground); overflow-wrap: anywhere;
}
h1, h2, h3 { margin: 0; line-height: 1.45; }
p { margin: 0 0 0.8em; }
p:last-child { margin-bottom: 0; }
ul { margin: 0; padding: 0; }
li { list-style: none; }
a { color: var(--accent); }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .wrap { padding: 0 28px; } }

.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--accent); color: #fff; padding: 10px 16px; z-index: 200; }
.skip-link:focus { left: 12px; top: 12px; }

/* 常時表示のデモ表示 */
.demo-banner {
  position: sticky; top: 0; z-index: 50;
  background: var(--warn-bg); border-bottom: 2px solid var(--warn-line); color: var(--warn-ink);
  padding: 8px 16px; text-align: center; font-size: 0.86rem; line-height: 1.6;
}
.demo-banner p { margin: 0; }
.demo-banner strong { font-size: 0.95rem; }

/* Header */
.app-header { background: var(--white); border-bottom: 1px solid var(--line); padding: 28px 0 24px; }
.app-owner { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; color: var(--accent); margin-bottom: 6px; }
.app-header h1 { font-size: clamp(1.4rem, 5.4vw, 2rem); margin-bottom: 10px; }
.h1-sub { display: inline-block; font-size: 0.7em; color: var(--ink-faint); font-weight: 700; }
.app-lead { color: var(--ink-soft); max-width: 44em; }
.scope { display: grid; gap: 10px; margin-top: 18px; }
@media (min-width: 640px) { .scope { grid-template-columns: 1fr 1fr; } }
.scope-col { border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; background: var(--accent-pale); }
.scope-col-no { background: #f3f1ec; }
.scope-title { font-weight: 700; font-size: 0.9rem; margin-bottom: 4px; }
.scope li { position: relative; padding-left: 1.1em; font-size: 0.9rem; }
.scope li::before { content: "・"; position: absolute; left: 0; }

/* Steps */
main { padding-top: 8px; padding-bottom: 32px; }
.noscript { background: var(--warn-bg); border: 1px solid var(--warn-line); padding: 12px; border-radius: 6px; margin-top: 16px; }
.step { margin-top: 28px; }
.step-num { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; color: var(--accent); margin-bottom: 2px; }
.step h2 { font-size: 1.3rem; margin-bottom: 14px; }
.step h2:focus { outline: none; }
.step h2:focus-visible { outline: 3px solid var(--accent); }
.tag-sample {
  display: inline-block; margin-left: 8px; vertical-align: middle;
  font-size: 0.72rem; font-weight: 700; color: var(--warn-ink);
  background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 4px; padding: 0 8px;
}

.picker { border: 0; padding: 0; margin: 0 0 16px; display: grid; gap: 14px; }
@media (min-width: 720px) { .picker { grid-template-columns: 1fr 1fr; } }
.picker-shop { font-size: 0.85rem; font-weight: 700; color: var(--ink-soft); margin-bottom: 6px; }
.pick {
  display: flex; align-items: center; gap: 10px;
  min-height: 48px; padding: 10px 14px; margin-bottom: 8px;
  background: var(--white); border: 2px solid var(--line); border-radius: 8px;
  cursor: pointer; font-weight: 700; font-size: 0.95rem;
}
.pick input { width: 20px; height: 20px; flex-shrink: 0; accent-color: var(--accent); margin: 0; }
.pick:has(input:checked) { border-color: var(--accent); background: var(--accent-pale); }
.pick:has(input:focus-visible) { outline: 3px solid var(--accent); outline-offset: 2px; }

.source, .result-grid { display: grid; gap: 14px; margin-bottom: 16px; }
@media (min-width: 820px) { .source, .result-grid { grid-template-columns: 1fr 1fr; align-items: start; } }
.panel { background: var(--white); border: 1px solid var(--line); border-radius: 8px; padding: 16px; }
@media (min-width: 768px) { .panel { padding: 20px; } }
.panel-title { font-size: 1rem; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.fake { font-size: 0.72rem; font-weight: 700; color: var(--warn-ink); background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 4px; padding: 0 6px; }
.shop-name { font-weight: 700; margin-bottom: 6px; }
.shop-info > div { display: grid; gap: 0 10px; padding: 6px 0; border-top: 1px solid var(--line); font-size: 0.88rem; }
.shop-info dt { font-weight: 700; color: var(--ink-faint); }
.shop-info dd { margin: 0; }
@media (min-width: 480px) { .shop-info > div { grid-template-columns: 8.5em 1fr; } }
.panel-note { margin-top: 10px; font-size: 0.8rem; color: var(--ink-faint); }
.mail-meta { font-size: 0.82rem; color: var(--ink-faint); margin-bottom: 8px; }
.mail-body {
  margin: 0; padding: 14px 16px; border-left: 4px solid var(--accent);
  background: var(--ground); border-radius: 4px; white-space: pre-line; font-size: 0.95rem;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 10px 22px; border-radius: 6px;
  font: inherit; font-weight: 700; cursor: pointer; border: 2px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-outline { background: var(--white); color: var(--accent); border-color: var(--accent); }
.btn-outline:hover { background: var(--accent-pale); }
#showResult { width: 100%; }
@media (min-width: 600px) { #showResult { width: auto; } }
.btn-note { margin-top: 8px; font-size: 0.82rem; color: var(--ink-faint); }

.bullets li { position: relative; padding-left: 1.2em; margin-bottom: 6px; }
.bullets li::before { content: ""; position: absolute; left: 0.15em; top: 0.72em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.panel-check { border-color: var(--warn-line); }
.checks { border: 0; padding: 0; margin: 0; }
.check { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; border-top: 1px solid var(--line); cursor: pointer; font-size: 0.93rem; }
.check:first-child { border-top: none; padding-top: 0; }
.check input { width: 20px; height: 20px; margin: 3px 0 0; flex-shrink: 0; accent-color: var(--accent); }
.check-count { margin-top: 8px; font-size: 0.85rem; font-weight: 700; color: var(--ink-soft); }
.caution {
  background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn-ink);
  border-radius: 6px; padding: 10px 14px; font-size: 0.9rem; font-weight: 700;
}

.draft-label { display: block; font-weight: 700; margin-bottom: 6px; }
textarea {
  width: 100%; min-height: 20em; resize: vertical;
  font: inherit; font-size: 0.95rem; line-height: 1.8;
  padding: 12px 14px; border: 2px solid var(--line); border-radius: 8px; background: var(--white); color: var(--ink);
}
textarea:focus-visible { border-color: var(--accent); outline: 3px solid var(--accent-pale); }
.char-count { text-align: right; font-size: 0.8rem; color: var(--ink-faint); margin: 4px 0 10px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.actions .btn { flex: 1 1 200px; }
@media (min-width: 600px) { .actions .btn { flex: 0 0 auto; } }
.status { min-height: 1.8em; margin-top: 10px; font-weight: 700; color: var(--accent-dark); }
.draft-note { font-size: 0.82rem; color: var(--ink-faint); }

.about { margin-top: 36px; background: var(--white); border: 1px solid var(--line); border-radius: 8px; padding: 20px; }
.about h2 { font-size: 1.15rem; margin-bottom: 10px; }
.about p { color: var(--ink-soft); font-size: 0.95rem; }
.about-link { margin-top: 12px; font-weight: 700; }

.app-footer { border-top: 1px solid var(--line); background: var(--white); padding: 20px 0; font-size: 0.82rem; color: var(--ink-faint); }