* { margin: 0; padding: 0; box-sizing: border-box; }

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;600&display=swap');

:root {
  --bg: #1e1e1e;
  --bg-lighter: #252526;
  --bg-light: #2d2d2d;
  --border: #3e3e3e;
  --fg: #d4d4d4;
  --fg-dim: #808080;
  --green: #6a9955;
  --cyan: #569cd6;
  --yellow: #dcdcaa;
  --orange: #ce9178;
  --red: #f44747;
  --blue: #569cd6;
  --purple: #c586c0;
  --accent: #0078d4;
}

body {
  font-family: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  background: var(--bg);
  color: var(--fg);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 13px;
}

/* ── Global Sidebar ── */
#globalSidebar {
  width: 160px;
  height: 100vh;
  max-height: 700px;
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  border-right: none;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex-shrink: 0;
}

#globalSidebar .sidebar-title {
  padding: 8px 10px;
  color: var(--fg-dim);
  font-size: 11px;
  border-bottom: 1px solid var(--border);
}

#globalSidebar .online-count {
  padding: 6px 10px;
  color: var(--fg-dim);
  font-size: 11px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

#app {
  width: 100%;
  max-width: 560px;
  height: 100vh;
  max-height: 700px;
  background: var(--bg);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Login ── */
#login {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 12px;
  padding: 20px;
}

#login h2 {
  color: var(--cyan);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
}

#login .robot-icon {
  margin-bottom: -4px;
}

#login .ascii-art {
  color: var(--green);
  font-size: 11px;
  line-height: 1.2;
  white-space: pre;
  margin-bottom: 8px;
}

#login .prompt-line {
  color: var(--fg-dim);
  font-size: 12px;
  max-width: 280px;
  width: 100%;
  text-align: left;
}

#login input {
  padding: 8px 12px;
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: inherit;
  font-size: 13px;
  width: 100%;
  max-width: 280px;
  outline: none;
}

#login input:focus {
  border-color: var(--accent);
}

#login input::placeholder {
  color: var(--fg-dim);
}

#login button {
  padding: 8px 24px;
  background: var(--accent);
  color: #fff;
  border: none;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  width: 100%;
  max-width: 280px;
  letter-spacing: 1px;
}

#login button:hover {
  background: #1a8cff;
}

.error {
  color: var(--red);
  font-size: 12px;
  min-height: 18px;
}

/* ── Chat ── */
#chat {
  display: flex;
  flex-direction: column;
  height: 100%;
}

#chatBody {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.user-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  color: var(--fg);
}

.user-item .user-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
}

.user-item .user-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-item.me .user-name {
  color: var(--cyan);
  font-weight: 600;
}

#header {
  padding: 8px 12px;
  background: var(--bg-lighter);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
}

#currentUser {
  color: var(--cyan);
}

#onlineCount {
  color: var(--fg-dim);
  font-size: 11px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 3px;
}

#onlineCount:hover {
  color: var(--fg);
  background: var(--bg-light);
}

/* ── Online Dropdown ── */
.dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: fixed;
  min-width: 140px;
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  z-index: 100;
  max-height: 200px;
  overflow-y: auto;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

.dropdown-menu.open {
  display: block;
}

#status {
  color: var(--green);
  font-size: 11px;
}

#messages {
  flex: 1;
  min-width: 0;
  overflow-y: auto;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

#messages::-webkit-scrollbar {
  width: 6px;
}

#messages::-webkit-scrollbar-thumb {
  background: var(--border);
}

.msg {
  font-size: 13px;
  line-height: 1.6;
  word-break: break-word;
  padding: 1px 0;
}

.msg .prompt {
  color: var(--fg-dim);
  margin-right: 4px;
}

.msg .name {
  font-weight: 600;
}

.msg.mine .name {
  color: var(--green);
}

.msg.other .name {
  color: var(--cyan);
}

.msg .content {
  color: var(--fg);
}

.msg .time {
  color: var(--fg-dim);
  font-size: 11px;
  margin-left: 8px;
}

.msg .cursor {
  display: inline-block;
  width: 7px;
  height: 14px;
  background: var(--fg);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* System messages */
.msg.system {
  color: var(--fg-dim);
  font-style: italic;
  padding-left: 12px;
  border-left: 2px solid var(--border);
}

/* ── Input bar ── */
#inputBar {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  background: var(--bg-lighter);
  gap: 0;
}

#inputBar .prompt-symbol {
  color: var(--green);
  margin-right: 8px;
  font-weight: 600;
  white-space: nowrap;
}

#msgInput {
  flex: 1;
  padding: 6px 0;
  background: transparent;
  border: none;
  color: var(--fg);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  caret-color: var(--fg);
}

#msgInput::placeholder {
  color: var(--fg-dim);
}

#inputBar button {
  padding: 4px 12px;
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
  letter-spacing: 1px;
  text-transform: uppercase;
}

#inputBar button:hover {
  color: var(--fg);
  border-color: var(--fg-dim);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
}

/* ── Room List ── */
#roomList {
  display: flex;
  flex-direction: column;
  height: 100%;
}

#roomHeader {
  padding: 8px 12px;
  background: var(--bg-lighter);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
}

#roomHeader .room-title {
  color: var(--fg-dim);
  flex: 1;
}

#roomUser {
  color: var(--cyan);
}

#logoutBtn {
  padding: 2px 8px;
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
}

#logoutBtn:hover {
  color: var(--red);
  border-color: var(--red);
}

#roomItems {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.room-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  cursor: pointer;
  transition: background 0.1s;
}

.room-item:hover {
  background: var(--bg-light);
}

.room-item .room-name {
  color: var(--yellow);
  font-weight: 600;
}

.room-item .room-name::before {
  content: '# ';
  color: var(--fg-dim);
}

.room-item .room-info {
  color: var(--fg-dim);
  font-size: 11px;
}

.room-actions {
  display: none;
  gap: 4px;
}

.room-item:hover .room-actions {
  display: flex;
}

.room-actions button {
  padding: 2px 8px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 10px;
  cursor: pointer;
  letter-spacing: 1px;
}

.btn-clear:hover {
  color: var(--yellow);
  border-color: var(--yellow);
}

.btn-delete:hover {
  color: var(--red);
  border-color: var(--red);
}

.room-empty {
  color: var(--fg-dim);
  padding: 16px;
  font-style: italic;
}

#createRoom {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-lighter);
}

#createRoom .create-label {
  color: var(--fg-dim);
  font-size: 12px;
  margin-bottom: 8px;
}

#createRoom .create-row {
  display: flex;
  gap: 6px;
}

#createRoom input {
  flex: 1;
  padding: 6px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: inherit;
  font-size: 12px;
  outline: none;
}

#createRoom input:focus {
  border-color: var(--accent);
}

#createRoom input::placeholder {
  color: var(--fg-dim);
}

#createRoom button {
  padding: 6px 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
}

#createRoom button:hover {
  background: #1a8cff;
}

/* ── Chat header extras ── */
#chatRoomName {
  color: var(--yellow);
  font-size: 12px;
}

#chatRoomName::before {
  content: '# ';
  color: var(--fg-dim);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

#leaveBtn {
  padding: 2px 8px;
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
}

#leaveBtn:hover {
  color: var(--fg);
  border-color: var(--fg-dim);
}

/* ── Terminal Dialog ── */
.term-dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.term-dialog {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  min-width: 280px;
  max-width: 360px;
  padding: 16px;
}

.term-dialog-header {
  color: var(--green);
  font-size: 12px;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.term-dialog-msg {
  color: var(--fg);
  font-size: 13px;
  margin-bottom: 16px;
  line-height: 1.5;
  word-break: break-word;
}

.term-dialog-input {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  margin-bottom: 16px;
}

.term-dialog-input:focus {
  border-color: var(--accent);
}

.term-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.term-btn {
  padding: 6px 16px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  letter-spacing: 1px;
}

.term-btn-ok:hover {
  color: var(--green);
  border-color: var(--green);
}

.term-btn-cancel:hover {
  color: var(--red);
  border-color: var(--red);
}

/* ── Mobile ── */
@media (max-width: 500px) {
  body {
    align-items: flex-start;
    height: 100dvh;
  }

  #app {
    max-height: 100dvh;
    height: 100dvh;
    border: none;
  }

  #login .ascii-art {
    font-size: 7px;
    line-height: 1.1;
  }

  #login input,
  #login button {
    max-width: 100%;
  }

  #login .prompt-line {
    max-width: 100%;
  }

  #createRoom .create-row {
    flex-wrap: wrap;
  }

  #createRoom input {
    min-width: 0;
  }

  #inputBar {
    padding-bottom: max(8px, env(safe-area-inset-bottom));
  }

  #globalSidebar {
    display: none !important;
  }
}