:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --line: #e2e5ea;
  --text: #1c1f24;
  --muted: #66707d;
  --accent: #2f8f4e;
  --accent-text: #ffffff;
  --danger: #c0392b;
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181d;
    --panel: #1f2229;
    --line: #2e323b;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --accent: #3ba55c;
    --danger: #e0645f;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.5; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); }
.spacer { flex: 1; }

header { background: var(--panel); border-bottom: 1px solid var(--line); }
.head { display: flex; align-items: center; gap: 12px; height: 60px; }
.brand { font-weight: bold; font-size: 18px; color: var(--text); text-decoration: none; }
.tagline { color: var(--muted); font-size: 14px; }

.btn { display: inline-block; padding: 8px 18px; border-radius: 6px; text-decoration: none; background: var(--line); color: var(--text); white-space: nowrap; }
.btn.primary { background: var(--accent); color: var(--accent-text); }
.btn.disabled { opacity: .5; }

.toolbar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 24px; }
.toolbar h1 { margin: 0; font-size: 22px; flex: 1; }
input[type=search] { padding: 8px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); color: var(--text); font: inherit; width: 100%; max-width: 320px; }
.hint { color: var(--muted); font-size: 14px; }

.rooms { display: grid; gap: 12px; margin: 16px 0; }
.room { display: flex; gap: 16px; align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 16px; }
.room-main { flex: 1; min-width: 0; }
.room h2 { margin: 0 0 4px; font-size: 17px; overflow-wrap: anywhere; }
.meta { color: var(--muted); font-size: 13px; overflow-wrap: anywhere; }
.desc { margin: 8px 0 0; font-size: 14px; overflow-wrap: anywhere; }
.room-side { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.count { color: var(--muted); font-size: 14px; }
.back { display: inline-block; margin: 24px 0 12px; color: var(--muted); }

footer { font-size: 12px; padding: 32px 16px; }

@media (max-width: 560px) {
  .tagline { display: none; }
  .room { flex-direction: column; align-items: stretch; }
  .room-side { flex-direction: row; justify-content: space-between; align-items: center; }
}

/* ---------- 帳號 ---------- */
button.btn { border: 0; font: inherit; cursor: pointer; }
button.btn:disabled { opacity: .5; cursor: default; }
.btn.small { padding: 4px 12px; font-size: 14px; }
.btn.danger { background: var(--danger); color: #fff; }
.small { font-size: 13px; }
a { color: var(--accent); }
.notice { margin-top: 16px; padding: 10px 14px; border-radius: 6px; background: var(--panel); border: 1px solid var(--danger); color: var(--danger); }

.auth-area { position: relative; }
.dropdown { position: relative; }
.menu { position: absolute; right: 0; top: calc(100% + 6px); background: var(--panel); border: 1px solid var(--line); border-radius: 8px; min-width: 200px; padding: 6px; z-index: 10; box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.menu-item { display: block; width: 100%; text-align: left; padding: 8px 10px; border: 0; background: none; color: var(--text); font: inherit; text-decoration: none; border-radius: 6px; cursor: pointer; white-space: nowrap; }
.menu-item:hover { background: var(--line); }
.me-btn { display: flex; align-items: center; gap: 8px; border: 0; background: none; color: var(--text); font: inherit; cursor: pointer; padding: 4px; }
.me-name { max-width: 10em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.avatar { display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; object-fit: cover; color: #fff; font-weight: bold; flex: none; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 20px; margin: 16px 0; }
.card h1, .card h2 { margin-top: 0; }
.card.narrow { max-width: 440px; margin: 40px auto; }
.card label { display: block; margin: 12px 0; }
.card label input:not([type=checkbox]):not([type=file]), .card textarea { display: block; width: 100%; margin-top: 4px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); font: inherit; }
.card label.check { display: flex; align-items: center; gap: 8px; }
.card label.btn { display: inline-block; margin: 0; cursor: pointer; }
.avatar-row { display: flex; align-items: center; gap: 16px; }
.plain-list { list-style: none; padding: 0; margin: 0; }
.plain-list li { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }
.danger-zone { border-color: var(--danger); }

.profile-head { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.profile-names { flex: 1; min-width: 0; }
.profile-names h1 { margin: 0; font-size: 24px; overflow-wrap: anywhere; }
.badges { display: flex; gap: 6px; margin-top: 6px; flex-wrap: wrap; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 10px; background: var(--accent); color: var(--accent-text); }
.bio { white-space: pre-wrap; overflow-wrap: anywhere; }

.footer-links { display: flex; gap: 16px; margin-bottom: 8px; flex-wrap: wrap; }
.footer-links a { color: var(--muted); }
.legal { max-width: 760px; }
.legal h1 { margin-top: 32px; }
.legal h2 { margin-top: 28px; font-size: 18px; }

@media (max-width: 560px) {
  .me-name { display: none; }
  #download { padding: 8px 12px; }
}

/* ---------- 好友、訊息 ---------- */
.head-link { color: var(--text); text-decoration: none; font-size: 14px; position: relative; white-space: nowrap; }
.auth-area { display: flex; align-items: center; gap: 14px; }
.badge-count { display: inline-block; min-width: 18px; padding: 0 5px; margin-left: 4px; border-radius: 9px; background: var(--danger); color: #fff; font-size: 11px; line-height: 18px; text-align: center; }
.presence { font-size: 13px; }
.presence::before { content: ''; display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; vertical-align: middle; background: var(--muted); }
.presence.online::before { background: #3ba55c; }
.presence.playing::before { background: #e0a030; }
.presence.offline { color: var(--muted); }
.counts { margin: 12px 0 4px; font-size: 14px; }
.profile-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.subtabs { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 8px; }
.subtabs button { background: none; border: 0; border-bottom: 2px solid transparent; color: var(--muted); font: inherit; padding: 8px 12px; cursor: pointer; }
.subtabs button.on { color: var(--text); border-bottom-color: var(--accent); }
.user-row .spacer { text-align: right; }
.user-link { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; min-width: 0; }
.user-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#user-search { max-width: none; }

.dm { display: grid; grid-template-columns: 280px 1fr; gap: 16px; margin-top: 24px; height: calc(100vh - 180px); min-height: 420px; }
.dm-list, .dm-thread { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 12px; overflow: hidden; display: flex; flex-direction: column; }
.dm-list h1 { font-size: 20px; margin: 4px 0 8px; }
.conv-list { overflow-y: auto; }
.conv { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 6px; cursor: pointer; border-bottom: 0 !important; justify-content: flex-start !important; }
.conv:hover, .conv.on { background: var(--line); }
.conv-text { flex: 1; min-width: 0; }
.conv-last { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.thread-head { display: flex; align-items: center; gap: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); min-height: 40px; }
.thread-msgs { flex: 1; overflow-y: auto; padding: 12px 4px; display: flex; flex-direction: column; gap: 8px; }
.msg { max-width: 75%; align-self: flex-start; }
.msg.mine { align-self: flex-end; text-align: right; }
.msg-body { display: inline-block; text-align: left; padding: 8px 12px; border-radius: 12px; background: var(--line); white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.mine .msg-body { background: var(--accent); color: var(--accent-text); }
.thread-form { display: flex; gap: 8px; padding-top: 8px; border-top: 1px solid var(--line); }
.thread-form textarea { flex: 1; resize: none; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); font: inherit; }
.dm-back { display: none; }

@media (max-width: 560px) {
  .head-link { font-size: 13px; }
  .auth-area { gap: 10px; }
  .dm { grid-template-columns: 1fr; height: calc(100vh - 150px); }
  .dm .dm-thread { display: none; }
  .dm.thread-open .dm-list { display: none; }
  .dm.thread-open .dm-thread { display: flex; }
  .dm-back { display: inline-block; }
  .user-row { flex-wrap: wrap; }
}