:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  --chat-bg: #ffffff;
  --text-main: #1f2937;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --door-width: 50%;
  --transition-speed: 1.1s;

  --surface: #ffffff;
  --surface-2: #f3f4f6;
  --surface-3: #fafafa;
  --page-surface: #eef2f6;
  --card-bg: rgba(255, 255, 255, 0.92);
  --login-card-bg: rgba(255, 255, 255, 0.95);
  --confirm-card-bg: rgba(255, 255, 255, 0.96);
  --emoji-panel-bg: rgba(255, 255, 255, 0.98);
  --btn-bg: #ffffff;
  --btn-border: #d1d5db;
  --input-border: #d1d5db;
}

:root[data-theme="dark"] {
  --bg-gradient: linear-gradient(135deg, #0b1220 0%, #141a2a 100%);
  --chat-bg: #0f1625;
  --text-main: #e5e7eb;
  --text-secondary: #9ca3af;
  --border: rgba(148, 163, 184, 0.18);

  --surface: #0f1625;
  --surface-2: #0b1220;
  --surface-3: #0b1220;
  --page-surface: #0b1220;
  --card-bg: rgba(15, 22, 37, 0.92);
  --login-card-bg: rgba(15, 22, 37, 0.95);
  --confirm-card-bg: rgba(15, 22, 37, 0.96);
  --emoji-panel-bg: rgba(15, 22, 37, 0.98);
  --btn-bg: rgba(15, 22, 37, 0.92);
  --btn-border: rgba(148, 163, 184, 0.28);
  --input-border: rgba(148, 163, 184, 0.28);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

.srOnly {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-gradient);
  color: var(--text-main);
}

:root {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

/* === Scene === */
.scene-container {
  position: relative;
  width: 100%;
  height: 100%;
  perspective: 1500px;
  overflow: hidden;
}

/* === Chat behind doors === */
.chat-room {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1;
  background: var(--page-surface);
  filter: blur(6px);
  transition: filter var(--transition-speed) ease;
}

.chat-room.active {
  filter: blur(0);
}

.chat-interface {
  width: 92%;
  max-width: 1100px;
  height: 88%;
  background: var(--chat-bg);
  border-radius: 20px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: scale(0.95);
  transition:
    opacity 1s ease 0.4s,
    transform 1s ease 0.4s;
}

.chat-room.active .chat-interface {
  opacity: 1;
  transform: scale(1);
}

/* === Topbar === */
.topbar {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-weight: 800;
  color: var(--text-main);
}

.me {
  color: var(--text-secondary);
  font-size: 12px;
}

.topbarRight {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menuBtn {
  display: inline-grid;
}

.menuDropdown {
  position: absolute;
  top: 58px;
  right: 12px;
  z-index: 60;
  width: min(360px, calc(100% - 24px));
}

.menuDropdown[hidden] {
  display: none !important;
}

.menuDropdownCard {
  max-height: calc(88vh - 70px);
  overflow: auto;
  padding: 12px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}

.menuDropdownHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.menuDropdownTitle {
  font-weight: 900;
  color: var(--text-main);
}

/* === Layout === */
.layout {
  flex: 1;
  display: flex;
  min-height: 0;
}

.sidebar {
  width: 280px;
  background: var(--surface-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 12px;
  overflow: auto;
}

.fold {
  padding: 0;
}

.foldSummary {
  list-style: none;
  cursor: pointer;
  padding: 12px;
  font-size: 13px;
  font-weight: 800;
  color: var(--text-main);
  user-select: none;
}

.foldSummary::-webkit-details-marker {
  display: none;
}

.foldBody {
  padding: 0 12px 12px;
}

.fold[open] .foldSummary {
  border-bottom: 1px solid var(--border);
}

.chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: var(--surface);
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
}

.admin {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.adminHeader {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  font-size: 12px;
  color: var(--text-secondary);
  padding: 6px 2px;
}

.adminHeader > div {
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.adminRow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
}

.adminRow > * {
  min-width: 0;
}

.adminRowName {
  font-weight: 800;
  color: var(--text-main);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.userNameAdmin {
  color: #e74c3c;
}

.userNameVerified {
  color: #8b5cf6;
}

.userNameMember {
  color: #3b82f6;
}

.adminRowName.userNameAdmin,
.onlineName.userNameAdmin {
  color: #e74c3c;
}

.adminRowName.userNameVerified,
.onlineName.userNameVerified {
  color: #8b5cf6;
}

.adminRowName.userNameMember,
.onlineName.userNameMember {
  color: #3b82f6;
}

.adminRowActions {
  justify-self: end;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.iconBtn {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border-radius: 10px;
}

.iconBtn svg {
  width: 18px;
  height: 18px;
  display: block;
}

.iconBtnDanger {
  border-color: rgba(231, 76, 60, 0.35);
  color: #e74c3c;
}

.iconBtnDanger:hover {
  background: rgba(231, 76, 60, 0.08);
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-3);
  font-size: 12px;
  color: var(--text-secondary);
  max-width: 84px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.onlineList {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.onlineItem {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
}

.onlineDot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.14);
  flex: 0 0 auto;
}

.onlineName {
  font-weight: 900;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  color: var(--text-main);
}

.onlineMeTag {
  margin-left: auto;
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--text-secondary);
}

.adminRow .btn {
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 12px;
}

.cardTitle {
  font-size: 13px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

.row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hint {
  font-size: 12px;
  color: var(--text-secondary);
}

.hint.ok {
  color: #10b981;
}

.hint.bad {
  color: #e74c3c;
}

.link {
  font-size: 12px;
  color: var(--primary-color);
  text-decoration: none;
}

button.link {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--input-border);
  border-radius: 12px;
  outline: none;
  background: var(--surface);
  color: var(--text-main);
}

.input:focus {
  border-color: var(--primary-color);
}

.btn {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  cursor: pointer;
  font-weight: 600;
  color: var(--text-main);
}

.btnPrimary {
  border-color: transparent;
  background: var(--primary-color);
  color: #fff;
}

.btnPrimary:hover {
  background: var(--primary-hover);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* === Chat area === */
.chatHeader {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.chatTitle {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-main);
}

.chatSubtitle {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.messages {
  flex: 1;
  padding: 16px 18px;
  overflow: auto;
  background: var(--surface-3);
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
}

.msgRow {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  max-width: 80%;
}

.msgRow.left {
  justify-content: flex-start;
}

.msgRow.right {
  justify-content: flex-end;
  align-self: flex-end;
}

.bubble {
  padding: 10px 16px;
  border-radius: 12px;
  font-size: 14px;
  line-height: 1.4;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-main);
  word-wrap: break-word;
}

.bubble.me {
  background: var(--primary-color);
  border-color: transparent;
  color: #fff;
}

.meta {
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.chatName {
  font-weight: 900;
  color: var(--text-main);
}

.chatMetaSep {
  color: var(--text-secondary);
}

.chatTime {
  color: var(--text-secondary);
}

.bubble.me .meta,
.bubble.me .chatMetaSep,
.bubble.me .chatTime {
  color: rgba(255, 255, 255, 0.78);
}

.bubble.me .chatName {
  color: rgba(255, 255, 255, 0.96);
}

.bubble img {
  width: 200px;
  height: 200px;
  max-width: 100%;
  border-radius: 12px;
  display: block;
  object-fit: cover;
  cursor: zoom-in;
}

.composer {
  padding: 16px 18px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.composerRow {
  display: flex;
  gap: 10px;
  align-items: center;
}

.msgInputWrap {
  flex: 1;
  min-width: 0;
  position: relative;
}

.inlineThumb {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--border);
  background: var(--surface);
}

.msgInputWrap.hasThumb .input {
  padding-left: 54px;
}

.toolBtn {
  width: 40px;
  height: 40px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border-radius: 12px;
}

.toolBtn svg {
  width: 18px;
  height: 18px;
  display: block;
}

.toolBtn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

.composerAttach {
  display: flex;
  gap: 10px;
  align-items: center;
}

.attachChip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
}

.attachThumb {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.attachMeta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.attachName {
  font-size: 12px;
  font-weight: 800;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
}

.attachHint {
  font-size: 12px;
  color: var(--text-secondary);
}

.emojiPanel {
  position: absolute;
  left: 18px;
  bottom: 74px;
  z-index: 20;
  width: min(360px, calc(100% - 36px));
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--emoji-panel-bg);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.18);
  padding: 10px;
}

.emojiPanel[hidden] {
  display: none !important;
}

.emojiGrid {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
}

.emojiBtn {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  display: inline-grid;
  place-items: center;
  font-size: 18px;
  line-height: 1;
}

.emojiBtn:hover {
  background: var(--surface-2);
  border-color: var(--border);
}

/* === Doors === */
.doors-container {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  pointer-events: none;
}

.door {
  width: var(--door-width);
  height: 100%;
  position: relative;
  transition: transform var(--transition-speed) cubic-bezier(0.645, 0.045, 0.355, 1);
  transform-style: preserve-3d;
  pointer-events: none;
  box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.5);
}

.door.left {
  transform-origin: left;
  background: linear-gradient(90deg, #1a252f 0%, #34495e 100%);
  border-right: 2px solid #1a252f;
}

.door.right {
  transform-origin: right;
  background: linear-gradient(-90deg, #1a252f 0%, #34495e 100%);
  border-left: 2px solid #1a252f;
}

.doors-container.open .door.left {
  transform: rotateY(-110deg);
}

.doors-container.open .door.right {
  transform: rotateY(110deg);
}

.door::after {
  content: "";
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 20px;
  right: 20px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  pointer-events: none;
}

.door-handle {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 60px;
  background: #f1c40f;
  border-radius: 6px;
  box-shadow: 0 0 10px rgba(241, 196, 15, 0.5);
  transform: translateY(-50%);
}

.door.left .door-handle {
  right: 30px;
}

.door.right .door-handle {
  left: 30px;
}

/* === Login card === */
.login-wrapper {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: none;
}

.login-card {
  background: var(--login-card-bg);
  padding: 34px;
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  width: min(360px, 92vw);
  text-align: center;
  pointer-events: auto;
  transition: all 0.8s ease;
  backdrop-filter: blur(10px);
}

.login-card h1 {
  margin-bottom: 8px;
  color: var(--text-main);
  font-size: 1.5rem;
}

.login-card p {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 0.9rem;
}

.gateTabs {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.gatePanel {
  text-align: left;
  margin-top: 10px;
}

.gateModalCard {
  width: min(400px, 92vw) !important;
}

.gateModalHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.input-group {
  margin-bottom: 14px;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-main);
  font-size: 0.85rem;
  font-weight: 700;
}

.input-group input {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--input-border);
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
  background: var(--surface);
  color: var(--text-main);
}

.input-group input:focus {
  border-color: var(--primary-color);
}

.login-btn {
  width: 100%;
  padding: 12px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  margin-top: 6px;
}

.login-btn:hover {
  background: var(--primary-hover);
}

.login-btn:active {
  transform: scale(0.98);
}

.error-msg {
  color: #e74c3c;
  font-size: 0.85rem;
  min-height: 1.1rem;
  margin: 6px 0 4px;
  opacity: 0;
  transition: opacity 0.25s;
}

.error-msg.show {
  opacity: 1;
}

.login-wrapper.fade-out .login-card {
  opacity: 0;
  transform: scale(0.96) translateY(-10px);
}

.imgViewer {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: grid;
  place-items: center;
  padding: 20px;
}

.imgViewer[hidden] {
  display: none !important;
}

.imgViewerBackdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
}

.imgViewerImg {
  position: relative;
  max-width: min(92vw, 980px);
  max-height: 88vh;
  border-radius: 14px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
  background: var(--surface);
}

.imgViewerClose {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  cursor: pointer;
  backdrop-filter: blur(8px);
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 1000;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(17, 24, 39, 0.92);
  color: #fff;
  font-size: 12px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  max-width: min(92vw, 520px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toast.ok {
  background: rgba(16, 185, 129, 0.95);
}

.toast.bad {
  background: rgba(231, 76, 60, 0.95);
}

/* Confirm */
.confirm {
  position: fixed;
  inset: 0;
  z-index: 1001;
  display: grid;
  place-items: center;
  padding: 18px;
}

.confirm[hidden] {
  display: none !important;
}

.confirm::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
}

.confirmCard {
  position: relative;
  width: min(520px, 92vw);
  border-radius: 16px;
  background: var(--confirm-card-bg);
  border: 1px solid var(--border);
  padding: 14px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

.confirmTitle {
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 8px;
}

.confirmMsg {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.4;
  margin-bottom: 12px;
  white-space: pre-wrap;
}

@media (max-width: 900px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    display: none;
  }
  .msgRow {
    max-width: 90%;
  }
}

@media (max-width: 420px) {
  .adminHeader {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
  }
  .adminRow {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
  }
  .adminRowActions .btn {
    padding: 8px 8px;
  }
}