.message-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.4fr);
  gap: 28px;
  max-width: 1120px;
  margin: 0 auto 60px;
  padding: 0 20px;
}
.message-compose,
.message-card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}
.message-compose {
  align-self: start;
  position: sticky;
  top: 110px;
}
.message-compose textarea {
  width: 100%;
  resize: vertical;
  min-height: 140px;
  font: inherit;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
}
.message-compose label {
  display: block;
  margin: 20px 0 8px;
}
.message-compose p,
.message-card time {
  color: var(--muted);
  font-size: 13px;
}
.message-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 12px 0;
}
.message-card {
  margin: 0 0 16px;
}
.message-card p {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.8;
}
.message-card strong {
  color: var(--gold);
  overflow-wrap: anywhere;
}
.message-card .button {
  font-size: 12px;
  padding: 6px 12px;
}
.message-layout button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
@media (max-width: 760px) {
  .message-layout {
    grid-template-columns: 1fr;
    padding: 0 14px;
  }
  .message-compose {
    position: static;
  }
  .message-compose,
  .message-card {
    padding: 18px;
  }
}
.message-layout .button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  padding: 10px 16px;
  font: inherit;
  cursor: pointer;
}
.message-layout .button.primary {
  background: #d4b563;
  color: #26352d;
  border-color: #bda04e;
}
.message-layout .button:hover:not(:disabled) {
  border-color: var(--gold);
}
@media (min-width: 761px) {
  body > header {
    gap: 24px;
  }
  body > header nav {
    flex-wrap: nowrap;
    gap: 18px;
    min-width: 0;
    overflow-x: auto;
  }
  body > header nav a {
    white-space: nowrap;
    flex-shrink: 0;
  }
  body > header > .status {
    flex-shrink: 0;
  }
}

/* ===== 留言板 v2 ===== */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[data-page="messages"] .message-layout { grid-template-columns: 340px minmax(0, 1fr); gap: 24px; max-width: 1120px; padding: 0; }
@media (max-width: 1160px) { [data-page="messages"] .message-layout { margin-inline: 20px; } }
.message-compose { top: 16px; padding: 20px; }
.message-compose-head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.message-compose-head h2 { margin: 0; font-size: 20px; }
.message-compose-head p { margin: 2px 0 0; }
.message-compose-head .message-avatar { width: 40px; height: 40px; font-size: 18px; font-weight: 800; }
.message-compose textarea { min-height: 150px; line-height: 1.7; }
.message-compose textarea:focus { outline: 2px solid #d8b967; outline-offset: 1px; }
.message-hint { margin: 4px 0 0; font-size: 12px !important; }
.message-guest { display: grid; gap: 10px; padding: 14px; border: 1px dashed var(--line); border-radius: 12px; background: var(--bg); }
.message-guest[hidden], #message-editor[hidden] { display: none; }
.message-guest p { margin: 0; }
#message-feedback:empty { display: none; }
.message-feed-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 4px; }
.message-feed-head .message-topics { margin: 0; }
.message-day { display: flex; align-items: center; gap: 10px; margin: 18px 0 10px; font-size: 13px; color: var(--muted); font-weight: 700; }
.message-day::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.message-day:first-child { margin-top: 8px; }
.message-card { position: relative; margin: 0 0 10px; padding: 14px 18px 14px 20px; border-left: 4px solid var(--line); }
.message-card.message-topic-card-0 { border-left-color: #3f74c9; }
.message-card.message-topic-card-1 { border-left-color: #4f9a4a; }
.message-card.message-topic-card-2 { border-left-color: #b8923e; }
.message-card.message-topic-card-3 { border-left-color: #b8352d; }
.message-card.message-topic-card-4 { border-left-color: #9a8fb8; }
.message-card.is-mine { background: color-mix(in srgb, #d8b967 10%, var(--panel)); }
.message-card-head { display: flex; align-items: center; gap: 10px; }
.message-card-head time { margin-left: auto; white-space: nowrap; color: var(--muted); font-size: 12px; }
.message-card p { margin: 8px 0 0 40px; line-height: 1.75; }
.message-author .message-avatar { width: 30px; height: 30px; flex: 0 0 30px; }
.message-author img.message-avatar { border-radius: 8px; border: 1px solid var(--class-color, var(--line)); object-fit: cover; box-shadow: none; }
.message-author.class-themed strong { color: color-mix(in srgb, var(--class-color) 55%, #14291f); }
:root[data-theme="dark"] .message-author.class-themed strong { color: color-mix(in srgb, var(--class-color) 75%, white); }
.message-mine { padding: 0 6px; border-radius: 999px; background: #d8b967; color: #26352d; font-size: 11px; font-weight: 700; }
.message-topic-2 { background: #b8923e22; color: #8a6a1d; }
.message-topic-4 { background: #9a8fb822; color: #6e6494; }
main .message-card .message-delete { min-height: 0; padding: 2px 8px; border: 0; background: transparent; box-shadow: none; color: var(--muted); font-size: 12px; text-decoration: underline; }
main .message-card .message-delete:hover { color: #b8352d; }
.message-empty { padding: 28px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 12px; }
@media (max-width: 760px) {
  [data-page="messages"] .message-layout { grid-template-columns: 1fr; margin-inline: 14px; }
  .message-feed-head { flex-wrap: wrap; }
  .message-card p { margin-left: 0; }
}
@media (max-width: 760px) {
  .message-feed-head { flex-wrap: nowrap; }
  .message-feed-head .message-topics { flex-wrap: nowrap; overflow-x: auto; min-width: 0; padding-bottom: 4px; }
  .message-feed-head .message-topics button { flex: 0 0 auto; }
}