/* =======================================================================
   右上角用户菜单 + 关于弹窗
   index.php（画板列表）、board.php（画板页）和所有副页面
   （account.php / hims-db.php…）共用这一份，UI 只维护一处。
   依赖 :root 变量（--accent / --text / --sub / --line / --panel-glass …），
   这些变量在 auth.css 与 style.css 里都定义过，两边引入都能用。
   ======================================================================= */
/* ================= 右上角用户菜单 ================= */
/* index.php 和 board.php 共用，样式跟站点其它浮层保持同一套玻璃质感 */

.um-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 12px;
  padding: 4px 10px 4px 5px;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: background 0.16s, border-color 0.16s;
}

.um-trigger:hover {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--panel-border);
}

.um-trigger.um-open {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(22, 119, 255, 0.28);
}

.um-face-wrap {
  display: block;
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
}

.um-face {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: linear-gradient(135deg, #4b86ff, #2455e6);
}

.um-face-txt {
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

.um-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.um-caret {
  display: grid;
  place-items: center;
  color: var(--muted);
  transition: transform 0.16s;
}

.um-trigger.um-open .um-caret { transform: rotate(180deg); }

.um-menu {
  position: fixed;
  z-index: 2000;
  min-width: 224px;
  padding: 6px;
  border-radius: 14px;
  background: var(--panel-glass);
  border: 1px solid var(--panel-border);
  box-shadow: 0 18px 48px rgba(25, 55, 100, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  opacity: 0;
  transform: translateY(-6px) scale(0.98);
  transition: opacity 0.14s, transform 0.14s;
  transition-timing-function: cubic-bezier(0.22, 0.61, 0.36, 1);
}

.um-menu.in {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.um-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px 11px;
}

.um-head-av {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
}

.um-head-txt { min-width: 0; }

.um-head-txt b {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.um-head-txt small {
  display: block;
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.um-sep {
  height: 1px;
  background: var(--line-2);
  margin: 4px 6px;
}

.um-body { display: flex; flex-direction: column; gap: 1px; }

.um-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border: none;
  background: transparent;
  border-radius: 9px;
  font-size: 13.5px;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: background 0.12s, color 0.12s;
}

.um-item svg { flex: 0 0 auto; color: var(--sub); }
.um-item span { flex: 1; min-width: 0; }
.um-item em {
  font-style: normal;
  font-size: 11px;
  color: var(--muted);
  flex: 0 0 auto;
}

.um-item:hover { background: rgba(22, 119, 255, 0.1); }
.um-item:hover svg { color: var(--accent); }

.um-item.danger { color: #d93b32; }
.um-item.danger svg { color: #d93b32; }
.um-item.danger:hover { background: rgba(217, 59, 50, 0.1); }

/* ---------------- 「关于」弹窗 ---------------- */

.um-overlay {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(18, 32, 56, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.18s;
}

.um-overlay.in { opacity: 1; }

.um-modal {
  position: relative;
  width: min(520px, 100%);
  max-height: 86vh;
  overflow: auto;
  padding: 26px 26px 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 26px 70px rgba(18, 40, 76, 0.28);
  transform: translateY(12px) scale(0.98);
  transition: transform 0.2s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.um-overlay.in .um-modal { transform: translateY(0) scale(1); }

.um-x {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 30px;
  height: 30px;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-size: 21px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}

.um-x:hover { background: rgba(0, 0, 0, 0.06); color: var(--text); }

.um-about-top {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-2);
}

.um-logo { flex: 0 0 44px; }

.um-about-top h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
}

.um-about-top p {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--sub);
  line-height: 1.6;
}

.um-about-sec { padding: 16px 0 0; }

.um-about-sec > b {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.um-feat {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px 18px;
}

.um-feat li {
  position: relative;
  padding-left: 15px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.um-feat li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.um-dev {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: #fafbfc;
}

.um-dev-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  font-size: 13.5px;
}

.um-dev-row + .um-dev-row { border-top: 1px solid var(--line-2); }

.um-dev-row span {
  flex: 0 0 52px;
  color: var(--muted);
  font-size: 12.5px;
}

.um-dev-row b { font-weight: 600; color: var(--text); }

.um-dev-row a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.um-dev-row a:hover { text-decoration: underline; }

.um-about-foot {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line-2);
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}

/* 用户菜单的响应式必须放在这一批样式之后，否则会被上面的通用规则盖掉 */
@media (max-width: 768px) {
  .um-trigger { margin-left: 0; padding: 3px; }
  .um-name { max-width: 64px; }
}

@media (max-width: 560px) {
  .um-feat { grid-template-columns: 1fr; }
  .um-modal { padding: 22px 18px 16px; }
  .um-name { max-width: 76px; }
}

@media (max-width: 420px) {
  .um-name { display: none; }
  .um-trigger { padding: 4px; }
}