/* ============================================================
   MSE3D · 认证 UI 样式（弹窗 / Toast / 顶栏登录态 / 用户菜单）
   复用站点 CSS 变量：--cyan / --blue / --card-bg / --text-main ...
   自动适配 .light-theme
   ============================================================ */

/* ========== Toast 提示 ========== */
.mse3d-toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translate(-50%, 30px);
  z-index: 100000;
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: min(92vw, 460px);
  padding: 13px 18px;
  background: rgba(10, 16, 30, 0.96);
  border: 1px solid rgba(0, 245, 212, 0.4);
  border-radius: 10px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 245, 212, 0.15);
  backdrop-filter: blur(14px);
  color: var(--text-main, #e0fbfc);
  font-size: 14px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
  opacity: 0;
  pointer-events: auto;
  transition: opacity 0.3s, transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.mse3d-toast.show { opacity: 1; transform: translate(-50%, 0); }
.light-theme .mse3d-toast {
  background: rgba(255, 255, 255, 0.97);
  border-color: rgba(13, 148, 136, 0.4);
  color: var(--text-main, #1a1a2e);
}
.mse3d-toast-success { border-color: rgba(34, 197, 94, 0.5); }
.mse3d-toast-success .mse3d-toast-msg::before { content: "✅ "; }
.mse3d-toast-msg { flex: 1; min-width: 0; }
.mse3d-toast-btn {
  flex-shrink: 0;
  padding: 7px 16px;
  background: var(--cyan, #00f5d4);
  color: #02050a;
  border: none;
  border-radius: 6px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s;
}
.mse3d-toast-btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0, 245, 212, 0.5); }

/* ========== 遮罩 + 弹窗 ========== */
.mse3d-auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 100001;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(2, 5, 10, 0.78);
  backdrop-filter: blur(8px);
  animation: mse3dFadeIn 0.25s ease;
}
@keyframes mse3dFadeIn { from { opacity: 0; } to { opacity: 1; } }

.mse3d-auth-modal {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: 92vh;
  overflow-y: auto;
  padding: 28px 26px 24px;
  background: rgba(10, 16, 30, 0.98);
  border: 1px solid rgba(0, 245, 212, 0.35);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7), 0 0 40px rgba(0, 245, 212, 0.12);
  color: var(--text-main, #e0fbfc);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  animation: mse3dModalIn 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
@keyframes mse3dModalIn { from { opacity: 0; transform: translateY(20px) scale(0.97); } to { opacity: 1; transform: none; } }
.light-theme .mse3d-auth-modal {
  background: rgba(255, 255, 255, 0.99);
  border-color: rgba(13, 148, 136, 0.35);
  color: var(--text-main, #1a1a2e);
}

.mse3d-auth-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(139, 155, 180, 0.3);
  border-radius: 8px;
  color: var(--text-muted, #8b9bb4);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s;
}
.mse3d-auth-close:hover { border-color: var(--cyan, #00f5d4); color: var(--cyan, #00f5d4); }

/* ========== Tab 切换 ========== */
.mse3d-auth-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  padding: 4px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 10px;
}
.light-theme .mse3d-auth-tabs { background: rgba(0, 0, 0, 0.05); }
.mse3d-auth-tab {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  border-radius: 7px;
  color: var(--text-muted, #8b9bb4);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
}
.mse3d-auth-tab.active {
  background: linear-gradient(135deg, var(--cyan, #00f5d4), var(--blue, #00b4d8));
  color: #02050a;
  box-shadow: 0 2px 12px rgba(0, 245, 212, 0.4);
}

/* ========== 表单 ========== */
.mse3d-auth-form { display: flex; flex-direction: column; gap: 13px; }
.mse3d-auth-form.hidden { display: none; }

.mse3d-auth-hint {
  margin: 0 0 6px;
  padding: 9px 12px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--cyan, #00f5d4);
  background: rgba(0, 245, 212, 0.07);
  border-left: 3px solid var(--cyan, #00f5d4);
  border-radius: 0 6px 6px 0;
}
.light-theme .mse3d-auth-hint { color: var(--cyan, #0d9488); background: rgba(13, 148, 136, 0.08); }

.mse3d-auth-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 13px;
}

.mse3d-auth-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12.5px;
  color: var(--text-muted, #8b9bb4);
  font-weight: 500;
}
.mse3d-auth-form label.req > span:first-child::before,
.mse3d-auth-form label.req::before { content: "* "; color: #ff5470; font-weight: 700; }
/* label.req 用伪元素加星号会插到文本前；但 label 直接含文字节点，改用更稳的方式 */
.mse3d-auth-form label.req::before { content: "*"; color: #ff5470; margin-right: 3px; font-weight: 700; }

.mse3d-auth-form input[type="text"],
.mse3d-auth-form input[type="email"],
.mse3d-auth-form input[type="password"],
.mse3d-auth-form select {
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(139, 155, 180, 0.3);
  border-radius: 8px;
  color: var(--text-main, #e0fbfc);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.light-theme .mse3d-auth-form input,
.light-theme .mse3d-auth-form select {
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-main, #1a1a2e);
}
.mse3d-auth-form input:focus,
.mse3d-auth-form select:focus {
  outline: none;
  border-color: var(--cyan, #00f5d4);
  box-shadow: 0 0 0 3px rgba(0, 245, 212, 0.18);
}
.mse3d-auth-form select { cursor: pointer; }

/* 使用须知勾选区 */
.mse3d-auth-tos {
  margin-top: 2px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(139, 155, 180, 0.2);
  border-radius: 8px;
}
.light-theme .mse3d-auth-tos { background: rgba(0, 0, 0, 0.03); }
.mse3d-auth-tos-check {
  display: flex !important;
  flex-direction: row !important;
  align-items: flex-start;
  gap: 9px;
  cursor: pointer;
  font-size: 12.5px !important;
  line-height: 1.5;
  color: var(--text-muted, #8b9bb4) !important;
}
.mse3d-auth-tos-check::before { content: none !important; }
.mse3d-auth-tos-check input[type="checkbox"] {
  flex-shrink: 0;
  width: 17px;
  height: 17px;
  margin-top: 1px;
  accent-color: var(--cyan, #00f5d4);
  cursor: pointer;
}
.mse3d-auth-tos-check span { flex: 1; }
.mse3d-auth-tos-check a { color: var(--cyan, #00f5d4); text-decoration: underline; cursor: pointer; }
.mse3d-auth-tos-check a:hover { text-shadow: 0 0 8px rgba(0, 245, 212, 0.5); }

.mse3d-auth-submit {
  margin-top: 4px;
  padding: 12px;
  background: linear-gradient(135deg, var(--cyan, #00f5d4), var(--blue, #00b4d8));
  color: #02050a;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
}
.mse3d-auth-submit:hover:not(:disabled) { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0, 245, 212, 0.45); }
.mse3d-auth-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.mse3d-auth-error {
  display: none;
  margin-top: 14px;
  padding: 10px 14px;
  font-size: 13px;
  color: #ff5470;
  background: rgba(255, 0, 87, 0.1);
  border: 1px solid rgba(255, 0, 87, 0.35);
  border-radius: 8px;
  line-height: 1.45;
}

/* ========== 顶栏登录导航 #mse3d-auth-nav ========== */
/* 未登录：登录/注册按钮 */
.mse3d-auth-nav-btn {
  padding: 5px 15px;
  background: var(--btn-return-bg, rgba(10, 12, 16, 0.85));
  border: 1px solid var(--btn-return-border, rgba(139, 155, 180, 0.3));
  color: var(--btn-return-text, #8b9bb4);
  border-radius: 4px;
  font-size: 12px;
  font-family: var(--font-mono, "Courier New", monospace);
  cursor: pointer;
  transition: all 0.3s;
}
.mse3d-auth-nav-btn:hover {
  color: var(--btn-return-hover-text, #02050a);
  background: var(--cyan, #00f5d4);
  border-color: var(--cyan, #00f5d4);
  box-shadow: 0 0 15px rgba(0, 245, 212, 0.6);
}
.mse3d-auth-nav-btn.primary {
  background: linear-gradient(135deg, var(--cyan, #00f5d4), var(--blue, #00b4d8));
  color: #02050a;
  border-color: transparent;
  font-weight: 700;
}
.mse3d-auth-nav-btn.primary:hover { transform: translateY(-1px); }

/* 已登录：用户头像 chip + 下拉菜单 */
#mse3d-auth-nav { position: relative; display: flex; align-items: center; }
#mse3d-auth-nav.logged-in .mse3d-user-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px 4px 4px;
  background: var(--btn-return-bg, rgba(10, 12, 16, 0.85));
  border: 1px solid var(--card-border, rgba(0, 180, 216, 0.15));
  border-radius: 18px;
  cursor: pointer;
  transition: all 0.25s;
}
#mse3d-auth-nav.logged-in .mse3d-user-chip:hover { border-color: var(--cyan, #00f5d4); box-shadow: 0 0 12px rgba(0, 245, 212, 0.4); }
.mse3d-user-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: linear-gradient(135deg, var(--cyan, #00f5d4), var(--blue, #00b4d8));
  color: #02050a;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
}
.mse3d-user-name {
  color: var(--text-main, #e0fbfc);
  font-size: 13px;
  font-weight: 500;
  max-width: 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mse3d-user-caret { color: var(--text-muted, #8b9bb4); font-size: 10px; }

.mse3d-user-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 200px;
  background: rgba(10, 16, 30, 0.98);
  border: 1px solid var(--card-border, rgba(0, 180, 216, 0.2));
  border-radius: 10px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(12px);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 10000;
}
.light-theme .mse3d-user-menu { background: rgba(255, 255, 255, 0.99); }
.mse3d-user-menu.open { opacity: 1; transform: none; pointer-events: auto; }
.mse3d-user-menu-item {
  display: block;
  width: 100%;
  padding: 11px 14px;
  background: transparent;
  border: none;
  color: var(--text-main, #e0fbfc);
  font-size: 13px;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}
.mse3d-user-menu-item:hover { background: rgba(0, 245, 212, 0.1); }
.mse3d-user-menu-info {
  cursor: default;
  border-bottom: 1px solid rgba(139, 155, 180, 0.15);
  line-height: 1.5;
  font-size: 12.5px;
  color: var(--text-muted, #8b9bb4);
}
.mse3d-user-menu-info:hover { background: transparent; }
.mse3d-user-menu-info small { color: var(--text-muted, #8b9bb4); opacity: 0.8; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .mse3d-auth-modal { padding: 22px 18px 20px; max-width: 100%; }
  .mse3d-auth-row { grid-template-columns: 1fr; gap: 10px; }
  .mse3d-auth-tab { font-size: 14px; padding: 9px; }
  #mse3d-auth-nav.logged-in .mse3d-user-name { max-width: 70px; }
  .mse3d-toast { bottom: 78px; font-size: 13px; }
}