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

:root {
  --bg: #0a0e14;
  --bg-secondary: #0d1117;
  --bg-input: #161b22;
  --bg-highlight: #1a2030;
  --text: #c9d1d9;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --border: #21262d;
  --nick: #79c0ff;
  --timestamp: #484f58;
  --tab-active: #58a6ff;
  --tab-bg: #0d1117;
  --tab-hover: #161b22;
  --topic-bg: #0d1117;
  --unread-bg: #da3633;
  --warn: #d29922;
  --op-color: #f0883e;
  --voice-color: #3fb950;
  --action-color: #bc8cff;
  --system-color: #484f58;
}

html,
body,
#root {
  height: 100%;
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Courier New',
    Courier, monospace;
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
}

/* Login screen */
.login-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 16px;
}

.login-screen h1 {
  color: var(--accent);
  font-size: 2em;
}

.login-screen input {
  padding: 10px 16px;
  font-size: 16px;
  font-family: inherit;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 4px;
  width: 280px;
}

.login-screen button {
  padding: 10px 24px;
  font-size: 16px;
  font-family: inherit;
  background: var(--accent-dim);
  border: none;
  color: white;
  border-radius: 4px;
  cursor: pointer;
}

.login-screen button:hover {
  background: var(--accent);
}

.login-screen .error {
  color: var(--unread-bg);
}

.login-screen .motd {
  color: var(--text-muted);
  max-width: 400px;
  text-align: center;
  white-space: pre-wrap;
}

/* Main layout */
.app {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Tab bar */
.tab-bar {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  flex-shrink: 0;
  align-items: stretch;
  min-height: 32px;
}

.tab-bar::-webkit-scrollbar {
  height: 2px;
}

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

.tab {
  display: flex;
  align-items: center;
  padding: 6px 12px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  color: var(--text-muted);
  user-select: none;
  font-size: 12px;
  gap: 6px;
  transition:
    background 0.1s,
    color 0.1s;
}

.tab:hover {
  background: var(--tab-hover);
  color: var(--text);
}

.tab.active {
  color: var(--text);
  border-bottom-color: var(--tab-active);
  background: var(--bg-highlight);
}

.tab.server {
  font-weight: bold;
}

.tab .tab-name {
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab .close-btn {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1;
  flex-shrink: 0;
}

.tab .close-btn:hover {
  color: var(--unread-bg);
}

.tab .unread-badge {
  display: inline-block;
  background: var(--unread-bg);
  color: white;
  font-size: 10px;
  font-weight: bold;
  padding: 0 5px;
  border-radius: 8px;
  min-width: 16px;
  text-align: center;
  line-height: 16px;
  flex-shrink: 0;
}

/* Connection status */
.connection-status {
  display: flex;
  align-items: center;
  padding: 0 12px;
  background: var(--warn);
  color: var(--bg);
  font-size: 11px;
  font-weight: bold;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Topic bar */
.topic-bar {
  padding: 4px 12px;
  background: var(--topic-bg);
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 0;
}

.topic-bar .topic-label {
  color: var(--accent);
  font-weight: bold;
}

/* Content area */
.content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Messages */
.messages-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
}

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

.messages::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.message {
  padding: 1px 12px;
  line-height: 1.5;
  word-wrap: break-word;
}

.message:hover {
  background: var(--bg-highlight);
}

.message .timestamp {
  color: var(--timestamp);
  font-size: 11px;
  margin-right: 6px;
}

.message .nick {
  font-weight: bold;
  margin-right: 6px;
}

.message .nick::before {
  content: '<';
  color: var(--text-muted);
}

.message .nick::after {
  content: '>';
  color: var(--text-muted);
}

.message.system {
  color: var(--system-color);
  font-style: italic;
}

.message.system .timestamp {
  color: var(--timestamp);
}

.message.system .content::before {
  content: '*** ';
}

.message.action {
  color: var(--action-color);
}

.message.action .timestamp {
  color: var(--timestamp);
}

.message.action .action-nick {
  font-weight: bold;
}

/* Input bar — full width at bottom */
.input-bar {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.input-bar .input-nick {
  padding: 0 8px 0 12px;
  color: var(--accent);
  font-weight: bold;
  white-space: nowrap;
  flex-shrink: 0;
  font-size: 13px;
}

.input-bar .input-nick::after {
  content: '>';
  color: var(--text-muted);
  margin-left: 1px;
}

.input-bar input {
  flex: 1;
  padding: 8px 8px;
  font-family: inherit;
  font-size: 13px;
  background: transparent;
  border: none;
  color: var(--text);
  outline: none;
}

.input-bar input::placeholder {
  color: var(--text-muted);
}

/* User list */
.user-list {
  width: 170px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.user-list-header {
  padding: 6px 10px;
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  font-weight: bold;
  flex-shrink: 0;
}

.user-list-entries {
  overflow-y: auto;
  flex: 1;
  padding: 4px 0;
}

.user-list-entries::-webkit-scrollbar {
  width: 4px;
}

.user-list-entries::-webkit-scrollbar-thumb {
  background: var(--border);
}

.user-list .user {
  padding: 2px 10px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
}

.user-list .user:hover {
  background: var(--tab-hover);
}

.user-list .user.op {
  color: var(--op-color);
}

.user-list .user.voice {
  color: var(--voice-color);
}

/* Server tab messages */
.server-messages {
  color: var(--text-muted);
  padding: 8px 12px;
  white-space: pre-wrap;
  overflow-y: auto;
  flex: 1;
}

.server-messages .message {
  padding: 1px 0;
}

.server-messages .message:hover {
  background: var(--bg-highlight);
}

/* Responsive */
@media (max-width: 600px) {
  .user-list {
    display: none;
  }

  .tab {
    padding: 5px 8px;
    font-size: 11px;
  }

  .input-bar .input-nick {
    padding-left: 8px;
    font-size: 12px;
  }

  .input-bar input {
    font-size: 12px;
  }
}