/* Shelf LIFF — 静かなオーセンティックバーの設計魂を視覚化 */
:root {
  --bg: #1a1814;
  --bg-card: #25221d;
  --fg: #e8e3d8;
  --fg-muted: #9a9486;
  --accent: #c9a96e;
  --error: #d97757;
  --border: #3a342d;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: "Noto Serif JP", "Yu Mincho", "ヒラギノ明朝 ProN", serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

.hdr {
  padding: 28px 24px 18px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.hdr h1 {
  font-family: "Playfair Display", "Noto Serif JP", serif;
  font-size: 30px;
  font-weight: 400;
  letter-spacing: 0.16em;
  margin: 0 0 4px;
}
.hdr .tag {
  color: var(--fg-muted);
  font-size: 12px;
  margin: 0;
  letter-spacing: 0.04em;
}

.screen { display: none; max-width: 520px; margin: 0 auto; padding: 24px; }
.screen.active { display: block; }
.screen h2 {
  font-size: 17px;
  font-weight: 500;
  margin: 0 0 14px;
  letter-spacing: 0.06em;
  color: var(--fg);
}
.lead { font-size: 14px; line-height: 1.7; color: var(--fg); margin: 0 0 12px; }
.caption { font-size: 12.5px; color: var(--fg-muted); margin: 8px 0 16px; line-height: 1.6; }
.center { text-align: center; padding: 32px 0; }
.muted { color: var(--fg-muted); }
.error { color: var(--error); font-size: 13px; min-height: 1em; margin: 8px 0; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  margin: 12px 0;
}

.terms-body {
  max-height: 60vh;
  overflow-y: auto;
  font-size: 13.5px;
  line-height: 1.7;
}
.terms-body h3 {
  font-size: 14px;
  font-weight: 500;
  margin: 16px 0 8px;
  color: var(--accent);
}
.terms-body p { margin: 6px 0; }
.terms-body strong { color: var(--accent); font-weight: 500; }
.terms-body a { color: var(--accent); }

.btn {
  display: block;
  width: 100%;
  padding: 14px 20px;
  margin-top: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 15px;
  letter-spacing: 0.06em;
  cursor: pointer;
  background: var(--bg-card);
  color: var(--fg);
  transition: opacity 0.15s ease;
}
.btn.primary {
  background: var(--accent);
  color: #1a1814;
  border-color: var(--accent);
  font-weight: 500;
}
.btn.ghost { background: transparent; color: var(--fg-muted); }
.btn:active { opacity: 0.7; }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 本棚編集 */
.book-list { list-style: none; padding: 0; margin: 0 0 16px; }
.book-row {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  margin-bottom: 8px;
}
.book-row .row { display: flex; gap: 8px; align-items: center; margin-bottom: 6px; }
.book-row .row label { color: var(--fg-muted); font-size: 11.5px; min-width: 50px; letter-spacing: 0.05em; }
.book-row input {
  background: transparent;
  border: 0;
  border-bottom: 1px solid transparent;
  color: var(--fg);
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  padding: 4px 0;
}
.book-row input:focus {
  outline: none;
  border-bottom-color: var(--accent);
}
.book-row .meta { display: flex; justify-content: space-between; align-items: center; margin-top: 4px; }
.book-row .confidence { font-size: 11px; color: var(--fg-muted); }
.book-row .confidence.low { color: var(--error); }
.book-row .del {
  background: none;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
}

/* Stripe Elements 上書き */
#card-element { padding: 6px 0; }
.StripeElement--invalid { border-color: var(--error); }