/* ============================================================
   Chat page — WeChat + Email booking
   ============================================================ */

.back { margin: 0 0 24px; font-size: 13px; }
.back a { color: var(--muted); border-bottom: 1px solid var(--hairline); padding-bottom: 1px; }
.back a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.chat-header {
  padding-bottom: 32px;
}
.chat-header .name {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.1;
  margin: 0 0 14px;
}
.chat-header .bio {
  font-size: 15px;
  line-height: 1.7;
  color: #232323;
  margin: 0;
  max-width: 640px;
}

.chat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding: 32px 0 0;
}

.chat-card {
  min-width: 0;
}
.chat-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.005em;
  margin: 0 0 8px;
  color: var(--fg);
}
.chat-desc {
  font-size: 13.5px;
  color: var(--muted);
  margin: 0 0 20px;
  line-height: 1.6;
}

/* ---------- WeChat block ---------- */
.wechat-block {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--card-bg);
}
.qr {
  position: relative;
  width: 180px;
  aspect-ratio: 4 / 5;
  flex-shrink: 0;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg);
}
.qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.qr-fallback {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: repeating-linear-gradient(
    45deg,
    #f8f8f8 0 6px,
    #f0f0f0 6px 12px
  );
}
.wechat-meta {
  min-width: 0;
  flex: 1;
}
.wechat-meta .label {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 4px;
}
.wechat-meta .value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--fg);
  margin: 0 0 12px;
  word-break: break-all;
}
.copy-btn {
  font-family: var(--font-sans);
  font-size: 12px;
  padding: 4px 12px;
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  color: var(--fg);
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
}
.copy-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- Booking form ---------- */
.book-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
}
.book-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.book-form label.full { grid-column: 1 / -1; }
.book-form input,
.book-form select,
.book-form textarea {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 8px 10px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  text-transform: none;
  letter-spacing: normal;
}
.book-form textarea { resize: vertical; }
.book-form input:focus,
.book-form select:focus,
.book-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 98, 208, 0.12);
}

.submit-btn {
  grid-column: 1 / -1;
  justify-self: start;
  font-family: var(--font-sans);
  font-size: 14px;
  padding: 9px 20px;
  background: var(--fg);
  color: #fff;
  border: 1px solid var(--fg);
  border-radius: 999px;
  cursor: pointer;
  margin-top: 4px;
  transition: background .15s, color .15s, border-color .15s;
}
.submit-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
}
.form-note {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--faint);
  margin: 0;
}

/* ---------- Mail preview ---------- */
.mail-preview {
  grid-column: 1 / -1;
  margin-top: 8px;
  padding: 18px 20px;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--card-bg);
}
.mail-preview .preview-label {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 12px;
}
.mail-preview .preview-row {
  display: flex;
  gap: 10px;
  font-size: 13px;
  padding: 4px 0;
  border-bottom: 1px dashed var(--hairline);
  align-items: baseline;
}
.mail-preview .preview-key {
  font-family: var(--font-sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  min-width: 60px;
}
.mail-preview code {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--fg);
  background: none;
  padding: 0;
  word-break: break-all;
}
.preview-body {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 12px 14px;
  margin: 12px 0 14px;
  white-space: pre-wrap;
  overflow-x: auto;
}
.preview-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.preview-mailto {
  font-size: 13px;
  color: var(--accent);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 1px;
}
.preview-mailto:hover {
  border-bottom-color: var(--accent);
}

@media (max-width: 720px) {
  .chat-header .name { font-size: 34px; }
  .chat-grid { grid-template-columns: 1fr; gap: 32px; }
  .wechat-block { flex-direction: column; align-items: flex-start; }
  .qr { width: 200px; }
  .book-form { grid-template-columns: 1fr; }
}