:root {
  --bg: #0a0f0a;
  --bg-elev: #101813;
  --panel: #121e17;
  --border: #1f3a2f;
  --text: #e0e0e0;
  --text-dim: #8ca69b;
  --agent-text: #00ff88;
  --accent: #00f5c4;
  --error: #ff6b6b;
  --shadow: 0 14px 50px rgba(0, 0, 0, 0.55);
  --radius: 14px;

  --architect: #ffd700;
  --coder: #00ff88;
  --fast: #00bfff;
  --gemini: #ff6b6b;
  --claude: #c084fc;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  background:
    radial-gradient(circle at 20% 15%, rgba(0, 245, 196, 0.14), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(0, 255, 136, 0.1), transparent 32%),
    linear-gradient(160deg, #060a07 0%, #0a0f0a 58%, #09120d 100%);
  color: var(--text);
}

body {
  padding: 20px;
}

.app-shell {
  width: min(1100px, 100%);
  height: calc(100vh - 40px);
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 12px;
  background: linear-gradient(180deg, rgba(16, 24, 19, 0.95), rgba(10, 15, 10, 0.95));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px 0 18px;
}

.brand {
  font-size: 1.05rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.room-chip {
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.8rem;
}

.agent-strip {
  display: flex;
  gap: 8px;
  padding: 0 18px 0 18px;
  flex-wrap: wrap;
}

.agent-pill {
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
  color: var(--text);
  border-radius: 999px;
  font-size: 0.78rem;
  padding: 5px 10px;
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease;
}

.agent-pill:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.agent-pill[data-agent="architect"] {
  color: var(--architect);
}

.agent-pill[data-agent="coder"] {
  color: var(--coder);
}

.agent-pill[data-agent="fast"] {
  color: var(--fast);
}

.agent-pill[data-agent="gemini"] {
  color: var(--gemini);
}

.agent-pill[data-agent="claude"] {
  color: var(--claude);
}

.messages {
  margin: 0 12px;
  border: 1px solid var(--border);
  background: rgba(5, 10, 7, 0.88);
  border-radius: calc(var(--radius) - 4px);
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.message {
  border: 1px solid #1b3128;
  background: rgba(17, 29, 22, 0.88);
  border-radius: 10px;
  padding: 10px 11px;
}

.message.user {
  border-left: 3px solid var(--text-dim);
}

.message.agent {
  border-left: 3px solid var(--agent-text);
}

.message.system {
  border-left: 3px solid var(--accent);
  color: var(--accent);
}

.message.error {
  border-left: 3px solid var(--error);
}

.message-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 0.8rem;
}

.sender {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.sender.agent-architect {
  color: var(--architect);
}

.sender.agent-coder {
  color: var(--coder);
}

.sender.agent-fast {
  color: var(--fast);
}

.sender.agent-gemini {
  color: var(--gemini);
}

.sender.agent-claude {
  color: var(--claude);
}

.timestamp {
  color: var(--text-dim);
}

.message-body {
  color: var(--text);
  line-height: 1.45;
  word-break: break-word;
}

.message-body pre {
  background: #09120d;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  overflow-x: auto;
}

.message-body code {
  font-family: "JetBrains Mono", "Fira Code", monospace;
}

.thinking {
  color: var(--accent);
  font-size: 0.82rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.dots {
  display: inline-flex;
  gap: 4px;
}

.dots span {
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: var(--accent);
  animation: pulse 1s infinite ease-in-out;
}

.dots span:nth-child(2) {
  animation-delay: 0.18s;
}

.dots span:nth-child(3) {
  animation-delay: 0.36s;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(0.7);
    opacity: 0.5;
  }
  50% {
    transform: scale(1);
    opacity: 1;
  }
}

.composer {
  border-top: 1px solid var(--border);
  background: rgba(8, 14, 10, 0.95);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.composer-tools {
  display: flex;
  gap: 8px;
  justify-content: space-between;
  align-items: center;
}

.tool-btn {
  border: 1px solid var(--border);
  background: rgba(16, 24, 19, 0.9);
  color: var(--text);
  border-radius: 8px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.8rem;
  padding: 7px 10px;
  cursor: pointer;
}

.tool-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tool-btn.danger:hover {
  border-color: var(--error);
  color: var(--error);
}

.composer-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  position: relative;
}

.input-wrap {
  position: relative;
}

#messageInput {
  width: 100%;
  min-height: 76px;
  max-height: 200px;
  resize: vertical;
  background: #0a120d;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.94rem;
  line-height: 1.4;
}

#messageInput:focus {
  outline: 1px solid var(--accent);
  border-color: var(--accent);
}

#sendButton {
  border: 1px solid var(--accent);
  background: linear-gradient(180deg, rgba(0, 245, 196, 0.22), rgba(0, 245, 196, 0.08));
  color: var(--accent);
  border-radius: 10px;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 0 16px;
  cursor: pointer;
  min-width: 90px;
}

#sendButton:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.mention-menu {
  position: absolute;
  left: 0;
  bottom: calc(100% + 8px);
  width: min(280px, 100%);
  background: #101813;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 6px;
  display: none;
  flex-direction: column;
  gap: 3px;
  box-shadow: 0 16px 28px rgba(0, 0, 0, 0.45);
  z-index: 4;
}

.mention-menu.visible {
  display: flex;
}

.mention-option {
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  border-radius: 7px;
  text-align: left;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  padding: 6px 8px;
  cursor: pointer;
}

.mention-option:hover,
.mention-option.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 245, 196, 0.08);
}

@media (max-width: 800px) {
  body {
    padding: 0;
  }

  .app-shell {
    width: 100%;
    height: 100vh;
    border-radius: 0;
    border: none;
  }

  .topbar {
    padding-top: 12px;
  }

  .messages {
    margin: 0 8px;
    padding: 10px;
  }

  .composer-row {
    grid-template-columns: 1fr;
  }

  .composer-tools {
    flex-wrap: wrap;
  }

  .tool-btn {
    flex: 1;
    min-width: 150px;
  }

  #sendButton {
    min-height: 44px;
  }
}