:root {
  --bg: #0b1020;
  --panel: #121a33;
  --text: #e8ecff;
  --muted: #aab3dd;
  --accent: #6aa6ff;
  --danger: #ff6a6a;
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  background: var(--bg);
  color: var(--text);
}

.app {
  min-height: 100vh;
  padding: 16px;
}

.header {
  max-width: 1200px;
  margin: 0 auto 14px auto;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.logo {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
}

.title {
  font-weight: 700;
  font-size: 18px;
}

.subtitle {
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}

.main {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 14px;
}

@media (max-width: 900px) {
  .main {
    grid-template-columns: 1fr;
  }
}

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

.panel-title {
  font-weight: 700;
  margin-bottom: 10px;
}

.chat-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.messages {
  height: 62vh;
  overflow: auto;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.msg {
  margin: 10px 0;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.msg .role {
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.msg.user {
  border-color: rgba(106, 166, 255, 0.35);
  background: rgba(106, 166, 255, 0.06);
}

.msg.assistant {
  border-color: rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.03);
}

.composer {
  margin-top: 10px;
  display: flex;
  gap: 10px;
}

.input {
  flex: 1;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  outline: none;
}

.button {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(106, 166, 255, 0.5);
  background: rgba(106, 166, 255, 0.14);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
}

.hint {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.hint code {
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.workspace-actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 10px;
}

.files {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px;
  height: 28vh;
  overflow: auto;
  background: rgba(255, 255, 255, 0.02);
}

.file-item {
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  color: var(--muted);
  user-select: none;
}

.file-item:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
}

.file-view {
  margin-top: 10px;
}

.file-view-title {
  font-weight: 700;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 6px;
}

.file-content {
  width: 100%;
  height: 26vh;
  resize: none;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.12);
  color: var(--text);
  outline: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 12px;
}

.error {
  border-color: rgba(255, 106, 106, 0.35);
  background: rgba(255, 106, 106, 0.08);
}

.download-link {
  display: block;
  margin-top: 10px;
  color: #007bff;
  text-decoration: none;
  font-weight: bold;
}

.download-link:hover {
  text-decoration: underline;
}