:root { --bg:#f6f6f4; --panel:#fff; --ink:#1d1d1b; --muted:#6b6b66; --line:#e3e2dd; --accent:#2f5d50; --accent-soft:#e6efeb;
  --warn:#9a5b00; --warn-soft:#fbf1e1; --bad:#a3322a; --good:#2e6b3a; --dark:#1f2a26; }
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif; color: var(--ink); background: var(--bg); display: flex; flex-direction: column; }
code, pre, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }
pre { white-space: pre-wrap; word-break: break-word; background: #f3f3ef; padding: 8px 10px; border-radius: 6px; margin: 6px 0; max-height: 320px; overflow: auto; }
.muted { color: var(--muted); }
.btn { display: inline-block; padding: 7px 13px; border-radius: 6px; border: 1px solid var(--line); background: #fff; color: var(--ink); font: inherit; font-weight: 550; cursor: pointer; text-decoration: none; line-height: 1.2; white-space: nowrap; }
.btn:hover:not(:disabled) { background: #f2f2ee; }
.btn:disabled { opacity: .5; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover:not(:disabled) { background: #264c41; }
.btn.danger { color: var(--bad); border-color: #efc9c4; }
.btn.ghost { border-color: transparent; background: transparent; color: #cfdcd7; }
.btn.small { padding: 4px 9px; font-size: 13px; }

/* top bar */
.top { display: flex; align-items: center; gap: 8px; padding: 8px 14px; background: var(--dark); color: #fff; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 16px; margin-right: 6px; }
.brand span { color: #9cc5b5; font-weight: 500; }
.top select { font: inherit; padding: 6px 8px; border-radius: 6px; border: 1px solid #3c4d47; background: #2a3833; color: #fff; max-width: 340px; }
.spacer { flex: 1; }
.status { font-size: 13px; padding: 3px 10px; border-radius: 99px; }
.status.idle { background: #2c3b36; color: #cfdcd7; }
.status.busy { background: #f0c36a; color: #3b2a00; animation: pulse 1.6s infinite; }
@keyframes pulse { 50% { opacity: .65; } }

/* layout */
.split { flex: 1; display: grid; grid-template-columns: minmax(360px, 42%) 1fr; min-height: 0; }
.chat { display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--line); background: #fafaf8; }
.log { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 8px; }
.composer { display: flex; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--line); background: #fff; }
.composer textarea { flex: 1; font: inherit; padding: 8px 10px; border: 1px solid #d3d2cc; border-radius: 6px; resize: vertical; min-height: 44px; }
.composer textarea:focus, input:focus { outline: 2px solid #a9cbbd; border-color: var(--accent); }

.msg { max-width: 94%; padding: 9px 12px; border-radius: 12px; overflow-x: auto; }
.msg p { margin: 0 0 6px; } .msg p:last-child { margin: 0; }
.msg h4 { margin: 8px 0 4px; font-size: 14px; }
.msg ul, .msg ol { margin: 4px 0 6px; padding-left: 20px; }
.msg table { border-collapse: collapse; font-size: 13px; margin: 6px 0; }
.msg th, .msg td { border: 1px solid var(--line); padding: 3px 7px; text-align: left; }
.msg code { background: #f0f0ec; padding: 0 4px; border-radius: 4px; }
.msg.user { align-self: flex-end; background: var(--accent); color: #fff; border-bottom-right-radius: 3px; white-space: normal; }
.msg.user small { display: block; opacity: .7; font-size: 11px; margin-top: 2px; text-align: right; }
.msg.claude { align-self: flex-start; background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 3px; }
.msg.live::after { content: "▍"; color: var(--accent); animation: pulse 1s infinite; }
.tool { align-self: stretch; font-size: 12.5px; color: #3f3f3a; padding: 3px 8px 3px 10px; border-left: 3px solid #d3d2cc; }
.tool-verb { font-weight: 600; }
.tool-what { font-family: ui-monospace, Menlo, monospace; font-size: 12px; color: var(--muted); word-break: break-all; }
.tool-state { margin-left: 6px; color: var(--muted); }
.tool-state.good { color: var(--good); } .tool-state.bad { color: var(--bad); font-weight: 600; }
.tool details summary { cursor: pointer; color: var(--muted); font-size: 12px; }
.todos { margin: 4px 0; padding-left: 18px; }
.todo-completed { text-decoration: line-through; color: var(--muted); }
.todo-in_progress { font-weight: 600; }
.note { align-self: center; font-size: 12px; color: var(--muted); background: #eeeeea; padding: 2px 10px; border-radius: 99px; }
.note.warn { background: var(--warn-soft); color: var(--warn); }
.note.good { background: #e7f3e9; color: var(--good); }
.note.faint { background: none; }
.note.mono { align-self: stretch; border-radius: 6px; white-space: pre-wrap; }
.empty { margin: auto; text-align: center; color: var(--muted); max-width: 380px; }

/* preview */
.preview { display: flex; flex-direction: column; min-height: 0; }
.preview-bar { display: flex; gap: 6px; align-items: center; padding: 6px 10px; border-bottom: 1px solid var(--line); background: #fff; }
.preview-bar input { flex: 1; font: 13px ui-monospace, Menlo, monospace; padding: 5px 8px; border: 1px solid #d3d2cc; border-radius: 6px; }
.pill { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--warn); background: var(--warn-soft); padding: 3px 8px; border-radius: 99px; }
#frame { flex: 1; width: 100%; border: 0; background: #fff; }

/* dialogs */
dialog { border: 1px solid var(--line); border-radius: 10px; padding: 20px 22px; max-width: 560px; width: calc(100% - 32px); }
dialog::backdrop { background: rgba(20, 28, 25, .45); }
dialog h2 { margin: 0 0 8px; font-size: 18px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 14px; }
.checkpoints { max-height: 50vh; overflow-y: auto; }
.cp { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); }

/* login */
.login-page { align-items: center; justify-content: center; padding: 16px; }
.login-card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 24px; width: 100%; max-width: 380px; }
.login-card .brand { color: var(--ink); font-size: 20px; margin-bottom: 8px; }
.login-card .brand span { color: var(--accent); }
.login-card label { display: block; font-weight: 600; font-size: 13px; margin: 12px 0 0; }
.login-card input { display: block; width: 100%; margin-top: 4px; font: inherit; padding: 8px 10px; border: 1px solid #d3d2cc; border-radius: 6px; }
.login-card button { width: 100%; margin-top: 16px; }
.login-card h2 { font-size: 16px; margin: 8px 0; }
.login-card #qr { display: block; margin: 10px auto; border: 1px solid var(--line); border-radius: 8px; }
.steps { padding-left: 18px; margin: 6px 0; color: var(--muted); font-size: 13px; }
.error { margin-top: 12px; padding: 8px 10px; border-radius: 6px; background: #fbe9e7; color: var(--bad); font-size: 13px; }

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; grid-template-rows: 58% 42%; }
  .chat { border-right: 0; border-bottom: 1px solid var(--line); }
  .top select { max-width: 160px; }
  #undo, #new-thread { display: none; }
}