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

:root {
  --bg: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-input: #0f3460;
  --text: #e0e0e0;
  --text-muted: #888;
  --accent: #e94560;
  --accent2: #0f3460;
  --border: #2a2a4a;
  --nick: #53a8b6;
  --timestamp: #666;
  --tab-active: #e94560;
  --tab-bg: #16213e;
  --tab-hover: #1a1a3e;
  --topic-bg: #121a30;
  --unread-bg: #e94560;
  --warn: #f0ad4e;
}

html, body, #root {
  height: 100%;
  font-family: 'Courier New', Courier, monospace;
  font-size: 14px;
  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);
  border: none;
  color: white;
  border-radius: 4px;
  cursor: pointer;
}

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

.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: center;
}

.tab {
  padding: 8px 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  color: var(--text-muted);
  user-select: none;
  position: relative;
}

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

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

.tab .close-btn {
  margin-left: 8px;
  color: var(--text-muted);
  font-size: 12px;
}

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

.tab .unread-badge {
  display: inline-block;
  background: var(--unread-bg);
  color: white;
  font-size: 10px;
  font-weight: bold;
  padding: 1px 5px;
  border-radius: 8px;
  margin-left: 6px;
  min-width: 16px;
  text-align: center;
}

/* Connection status */
.connection-status {
  padding: 4px 12px;
  background: var(--warn);
  color: #1a1a2e;
  font-size: 12px;
  font-weight: bold;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Topic bar */
.topic-bar {
  padding: 6px 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;
}

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

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

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
}

.message {
  padding: 2px 0;
  line-height: 1.4;
  word-wrap: break-word;
}

.message .timestamp {
  color: var(--timestamp);
  font-size: 12px;
  margin-right: 8px;
}

.message .nick {
  color: var(--nick);
  font-weight: bold;
  margin-right: 8px;
}

.message .nick::before { content: '<'; }
.message .nick::after { content: '>'; }

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

.message.system .nick {
  color: var(--text-muted);
}

.message.system .nick::before,
.message.system .nick::after { content: ''; }

/* Input */
.input-bar {
  display: flex;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
}

.input-bar input {
  flex: 1;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 14px;
  background: var(--bg-input);
  border: none;
  color: var(--text);
  outline: none;
}

.input-bar button {
  padding: 10px 16px;
  font-family: inherit;
  background: var(--accent);
  border: none;
  color: white;
  cursor: pointer;
}

/* User list */
.user-list {
  width: 160px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 8px;
  flex-shrink: 0;
}

.user-list h3 {
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.user-list .user {
  padding: 3px 4px;
  color: var(--nick);
  font-size: 13px;
  cursor: pointer;
}

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

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

/* Channel join dialog */
.join-dialog {
  padding: 12px;
  display: flex;
  gap: 8px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  margin-left: auto;
}

.join-dialog input {
  padding: 6px 10px;
  font-family: inherit;
  font-size: 13px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 3px;
  width: 200px;
}

.join-dialog button {
  padding: 6px 14px;
  font-family: inherit;
  font-size: 13px;
  background: var(--accent2);
  border: none;
  color: var(--text);
  border-radius: 3px;
  cursor: pointer;
}

/* Responsive */
@media (max-width: 600px) {
  .user-list { display: none; }
  .tab { padding: 6px 10px; font-size: 13px; }
}