/* ============================================
   Back to top button
   ============================================ */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  color: var(--color-ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 90;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.back-to-top:hover { background: var(--color-accent); color: #fff; transform: translateY(-2px); }
.back-to-top[hidden] { display: none; }

/* スマホでは底タブバーの上にせり上げる */
@media (max-width: 1024px) {
  .back-to-top { bottom: calc(70px + env(safe-area-inset-bottom)); right: 16px; }
}

/* ============================================
   Search modal
   ============================================ */
.search-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 250;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh var(--pad-mobile) 40px;
  animation: searchFade .25s ease;
}
.search-modal[hidden] { display: none; }
@keyframes searchFade { from { opacity: 0; } to { opacity: 1; } }

.search-modal-form {
  width: 100%;
  max-width: 600px;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  padding: 40px 36px;
  display: grid;
  gap: 18px;
  animation: searchUp .3s cubic-bezier(0.2,0.7,0.2,1);
}
@keyframes searchUp { from { transform: translateY(-12px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.search-modal-form .cover-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--color-muted);
  text-transform: uppercase;
}
.search-modal-input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  border-radius: 0;
}
.search-modal-input:focus { outline: 0; border-color: var(--color-accent); }
.search-modal-close {
  position: absolute;
  top: 18px; right: 18px;
  width: 40px; height: 40px;
  border: 1px solid var(--color-line);
  background: var(--color-bg);
  color: var(--color-ink);
  font-size: 22px;
  cursor: pointer;
  border-radius: 50%;
}

/* ============================================
   Contact form
   ============================================ */
.contact-form { display: grid; gap: 22px; margin-top: 32px; }
.contact-form__group { display: grid; gap: 8px; }
.contact-form__group label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--color-muted);
  text-transform: uppercase;
}
.contact-form__group .req,
.contact-form__group .opt {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  font-size: 9px;
  letter-spacing: 0.15em;
  border: 1px solid var(--color-line);
}
.contact-form__group .req { color: var(--color-accent); border-color: var(--color-accent); }
.contact-form__group input[type=text],
.contact-form__group input[type=email],
.contact-form__group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-ink);
}
.contact-form__group input:focus,
.contact-form__group textarea:focus { outline: 0; border-color: var(--color-accent); }
.contact-form__group textarea { min-height: 180px; resize: vertical; }
.contact-form__check {
  display: flex;
  gap: 10px;
  align-items: center;
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: 0;
  color: var(--color-ink);
  text-transform: none;
}
.contact-form__check a { color: var(--color-accent); text-decoration: underline; text-underline-offset: 3px; }
.contact-form__submit-wrap { margin-top: 8px; text-align: center; }
.contact-form__submit-wrap button { cursor: pointer; }

.contact-notice {
  margin: 24px 0;
  padding: 16px 20px;
  border: 1px solid var(--color-line);
  border-left-width: 3px;
  font-size: 14px;
}
.contact-notice--success { border-left-color: var(--color-accent); background: var(--color-paper); }
.contact-notice--error   { border-left-color: #c0392b; }