:root {
  --bg: #0d1117;
  --bg-2: #161b22;
  --bg-3: #1f242c;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --primary: #2f81f7;
  --primary-hover: #4493f8;
  --danger: #f85149;
  --success: #3fb950;
  --warning: #d29922;
  --user-msg: #1c2530;
  --assistant-msg: #161b22;
  --code-bg: #0d1117;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  --radius: 6px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
}

button { font-family: inherit; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.grow { flex: 1; }
.right { justify-content: flex-end; }
[hidden] { display: none !important; }

/* Layout principal: header + 3 colunas */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  height: 50px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
}
.brand .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.badge {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--muted);
}
.badge.local { color: var(--warning); border-color: var(--warning); }
.badge.remote { color: var(--primary); border-color: var(--primary); }

.auth {
  display: flex;
  gap: 6px;
  flex: 1;
  max-width: 600px;
}
.auth input {
  flex: 1;
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 12px;
}

.health {
  font-size: 12px;
  color: var(--muted);
}
.health #codexVersion { color: var(--text); font-family: var(--mono); }

.layout {
  display: grid;
  grid-template-columns: 240px 1fr 360px;
  height: calc(100vh - 50px);
}

/* Sidebar */
.sidebar {
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  padding: 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.session-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.session-list li {
  padding: 8px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13px;
  border: 1px solid transparent;
}
.session-list li:hover {
  background: var(--bg-3);
}
.session-list li.active {
  background: var(--bg-3);
  border-color: var(--primary);
}
.session-list .session-title {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}
.session-list .session-meta {
  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
  font-family: var(--mono);
}

/* Chat principal */
.chat {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  flex-wrap: wrap;
}
.chat-header .header-main {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 160px;
}
.chat-header .title {
  font-weight: 600;
  font-size: 14px;
}
.chat-header .meta {
  font-size: 11px;
  color: var(--muted);
  font-family: var(--mono);
}
.chat-header .actions { margin-left: auto; }
.header-controls {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
}
.hctrl {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 12px;
}
.hctrl input, .hctrl select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  font-family: var(--mono);
  font-size: 12px;
  min-width: 140px;
}
.hctrl input:focus, .hctrl select:focus {
  outline: none;
  border-color: var(--primary);
}
.save-status {
  align-self: center;
  min-width: 60px;
  transition: opacity 0.3s;
}
.save-status.flash { color: var(--success); }
.save-status.err { color: var(--danger); }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted);
  font-size: 13px;
}

.msg {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  max-width: 90%;
  position: relative;
}
.msg.user {
  background: var(--user-msg);
  align-self: flex-end;
  border-color: #2c4860;
}
.msg.assistant {
  background: var(--assistant-msg);
  align-self: flex-start;
}
.msg.streaming {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(47, 129, 247, 0.2);
}
.msg.err {
  border-color: var(--danger);
  box-shadow: 0 0 0 1px rgba(248, 81, 73, 0.15);
}
.msg.err .role { color: var(--danger); }

.msg .role {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 600;
}
.msg.user .role { color: #58a6ff; }
.msg.assistant .role { color: var(--success); }

.msg .content {
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: 14px;
}
.msg .content code {
  background: var(--code-bg);
  border-radius: 3px;
  padding: 1px 6px;
  font-family: var(--mono);
  font-size: 12.5px;
  border: 1px solid var(--border);
}
.msg .content pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  overflow-x: auto;
  font-size: 12.5px;
}
.msg .images {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.msg .images img {
  max-width: 120px;
  max-height: 120px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.msg .artifacts {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.msg .artifact {
  color: var(--primary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  text-decoration: none;
  font-size: 12px;
  background: var(--bg-3);
}
.msg .artifact:hover {
  border-color: var(--primary);
}

/* Composer */
.composer {
  border-top: 1px solid var(--border);
  background: var(--bg-2);
  padding: 12px 16px;
}
.dropzone {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  transition: border-color 0.15s;
}
.dropzone.dragover {
  border-color: var(--primary);
  background: rgba(47, 129, 247, 0.06);
}
.composer textarea {
  width: 100%;
  background: transparent;
  color: var(--text);
  border: none;
  resize: none;
  outline: none;
  font-family: inherit;
  font-size: 14px;
  padding: 6px;
}
.composer textarea:disabled { color: var(--muted); }
.image-tray {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 6px 0;
}
.image-tray:empty { display: none; }
.image-tray .thumb {
  position: relative;
  width: 64px;
  height: 64px;
  border-radius: 4px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: #000;
}
.image-tray .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.image-tray .thumb .remove {
  position: absolute;
  top: 2px; right: 2px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: rgba(0,0,0,0.7);
  color: white;
  border: none;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
}
.composer-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 6px;
}

/* Eventos */
.events {
  background: var(--bg-2);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.events-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}
.events-header .small { margin-left: auto; }
.events pre {
  margin: 0;
  padding: 12px;
  overflow: auto;
  flex: 1;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
}
.events pre .ev {
  display: block;
  padding: 4px 6px;
  border-radius: 3px;
  margin-bottom: 2px;
}
.events pre .ev.thread { color: #79c0ff; }
.events pre .ev.turn { color: #d2a8ff; }
.events pre .ev.cmd { color: #f0883e; }
.events pre .ev.msg { color: #3fb950; background: rgba(63, 185, 80, 0.06); }
.events pre .ev.reasoning { color: #a371f7; }
.events pre .ev.synth { color: var(--primary); font-weight: 600; }
.events pre .ev.err { color: var(--danger); }

/* Botoes */
.btn {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 14px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: background 0.1s, border-color 0.1s;
}
.btn:hover:not(:disabled) { background: #2a313c; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}
.btn.primary:hover:not(:disabled) { background: var(--primary-hover); border-color: var(--primary-hover); }
.btn.danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
}
.btn.danger:hover:not(:disabled) { background: rgba(248, 81, 73, 0.1); }
.btn.ghost { background: transparent; border-color: var(--border); }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.block { width: 100%; }

/* Modal */
dialog {
  background: var(--bg-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0;
  min-width: 480px;
  box-shadow: var(--shadow);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }
dialog form {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
dialog h3 { margin: 0 0 4px; font-size: 16px; }
dialog label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
}
dialog label.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
}
dialog input[type="text"], dialog select {
  background: var(--bg-3);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-family: inherit;
  font-size: 13px;
}
dialog .row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}
dialog .row.right {
  justify-content: flex-end;
  margin-top: 6px;
}

/* Status: rodando */
.running-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 12px;
  margin-left: 8px;
}
.running-indicator::before {
  content: "";
  width: 8px;
  height: 8px;
  border: 2px solid var(--primary);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast erros */
.toast {
  position: fixed;
  top: 60px;
  right: 16px;
  background: var(--bg-2);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  box-shadow: var(--shadow);
  z-index: 100;
  max-width: 380px;
  animation: slideIn 0.2s;
}
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } }