/* OpenUI — design system from the ZelAI frontend.
   Inter, monochrome, hairline borders, pill controls, no heavy shadows.
   Purple appears only where it reads as "model / agent" identity, mirroring
   how the marketing page uses it for model chips. */

:root {
  color-scheme: light;
  --text: #17181a;
  --muted: #8a8f97;
  --muted-2: #a7abb2;
  --faint: #b3b7bd;
  --border: #ececee;
  --border-2: #e2e2e5;
  --bg: #ffffff;
  --dark: #101112;
  --chip: #f1f1f4;
  --chip-hover: #f4f4f6;
  --raised: #fafafb;
  /* the single accent, used sparingly */
  --accent: #7a68e8;
  --accent-soft: #eee9fd;
  --ok: #1a9c6b;
  --bad: #d4544f;
  --warn: #9a7b18;

  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --r-sm: 11px;
  --r: 14px;
  --r-lg: 20px;
  --pill: 999px;
  --shadow: 0 12px 34px rgba(18, 22, 60, 0.09), 0 2px 8px rgba(18, 22, 60, 0.05);
  --shadow-sm: 0 1px 2px rgba(18, 22, 60, 0.05);
}

[data-theme="dark"] {
  color-scheme: dark;
  --text: #f0f1f3;
  --muted: #9aa0a8;
  --muted-2: #868c94;
  --faint: #6b7178;
  --border: #26272b;
  --border-2: #303236;
  --bg: #0e0f10;
  --dark: #f2f3f5;
  --chip: #1b1c1f;
  --chip-hover: #212227;
  --raised: #141517;
  --accent: #a294ff;
  --accent-soft: #221f3a;
  --ok: #3fbe8f;
  --bad: #f08a86;
  --warn: #d9b64a;
  --shadow: 0 12px 34px rgba(0, 0, 0, 0.5);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-soft); color: var(--text); }

button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; border-radius: 6px; }
[hidden] { display: none !important; }

/* ─── Login ─────────────────────────────────────────────────────────── */

.gate { display: grid; place-items: center; min-height: 100dvh; padding: 24px; }

.gate-card {
  width: min(400px, 100%);
  padding: 34px 32px 30px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg);
  box-shadow: var(--shadow);
  text-align: center;
}

.gate-llama { width: 44px; height: 44px; color: var(--text); margin: 0 auto; }

.gate h1 { margin: 16px 0 0; font-size: 23px; font-weight: 800; letter-spacing: -0.02em; }
.gate p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }

.gate-form { display: grid; gap: 9px; margin-top: 22px; }

.gate-form input {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  background: var(--chip);
  font-size: 14.5px;
  transition: box-shadow 0.15s, border-color 0.15s, background 0.15s;
}
.gate-form input::placeholder { color: var(--muted-2); }
.gate-form input:focus {
  outline: none;
  background: var(--bg);
  border-color: var(--text);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.gate-btn {
  padding: 13px 24px;
  border-radius: var(--pill);
  color: var(--bg);
  background: var(--dark);
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.15s ease, opacity 0.15s;
}
.gate-btn:hover:not(:disabled) { transform: scale(0.985); }
.gate-btn:disabled { opacity: 0.6; cursor: wait; }

.gate-hint {
  margin-top: 20px !important;
  padding-top: 15px;
  border-top: 1px solid var(--border);
  font-size: 12.5px !important;
  line-height: 1.6;
}
.gate-hint code { font-family: var(--mono); font-size: 11.5px; color: var(--muted); }

.gate-err {
  margin: 14px 0 0;
  padding: 10px 13px;
  border-radius: var(--r-sm);
  background: #fdeceb;
  color: var(--bad);
  font-size: 13px;
  font-weight: 600;
  text-align: left;
}
[data-theme="dark"] .gate-err { background: #2a1614; }
.gate-err[data-kind="ok"] { background: #e9f7f0; color: var(--ok); }
[data-theme="dark"] .gate-err[data-kind="ok"] { background: #10231a; }

/* ─── Shell ─────────────────────────────────────────────────────────── */

.app { display: grid; grid-template-columns: 268px minmax(0, 1fr); height: 100dvh; }

.sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--border);
  background: var(--bg);
}

.sidebar-header {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 8px;
}

.logo {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--text);
}
.logo svg { color: var(--text); flex-shrink: 0; }

.sidebar-search { padding: 6px 16px 12px; }
.sidebar-search input {
  width: 100%;
  padding: 9px 13px;
  border: 1px solid var(--border-2);
  border-radius: var(--pill);
  background: var(--chip);
  font-size: 13.5px;
  transition: box-shadow 0.15s, background 0.15s;
}
.sidebar-search input::placeholder { color: var(--muted-2); }
.sidebar-search input:focus {
  outline: none;
  background: var(--bg);
  box-shadow: 0 0 0 2px var(--border-2);
}

.conv-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 0 10px 10px;
  display: grid;
  gap: 1px;
  align-content: start;
}

.conv-item {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 9px 8px 9px 13px;
  border-radius: var(--r);
  cursor: pointer;
  transition: background 0.15s;
}
.conv-item:hover { background: var(--chip-hover); }
.conv-item.active { background: var(--chip); }
.conv-item.active .conv-item-title { font-weight: 600; }
.conv-item-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  font-size: 13.5px;
  color: var(--text);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.conv-item-delete {
  display: grid;
  place-items: center;
  padding: 5px;
  border-radius: 50%;
  color: var(--muted);
  opacity: 0;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
}
.conv-item:hover .conv-item-delete { opacity: 1; }
.conv-item-delete:hover { color: var(--bad); background: var(--bg); }

.sidebar-empty { padding: 12px 16px 18px; color: var(--faint); font-size: 12.5px; line-height: 1.6; }

.sidebar-footer {
  display: flex;
  gap: 2px;
  padding: 9px 12px;
  border-top: 1px solid var(--border);
}

.btn-icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
}
.btn-icon:hover { background: var(--chip-hover); color: var(--text); }
.btn-icon.on { background: var(--chip); color: var(--text); }

/* ─── Chat ──────────────────────────────────────────────────────────── */

.chat-main { display: flex; flex-direction: column; min-width: 0; min-height: 0; }

.chat-header {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
}

.chat-header-info { display: flex; flex: 1; gap: 10px; align-items: center; min-width: 0; }

.chat-title {
  overflow: hidden;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.select {
  max-width: 215px;
  padding: 7px 12px;
  border: 1px solid var(--border-2);
  border-radius: var(--pill);
  background: var(--chip);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
  transition: background 0.15s;
}
.select:hover { background: var(--chip-hover); }

.badge {
  padding: 5px 12px;
  border-radius: var(--pill);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* Update notice. Amber so it reads as "attend to this", never as a system
   error — the signature was valid, this is just a newer build existing. */
.update-banner {
  display: flex;
  gap: 11px;
  align-items: center;
  margin: 12px 18px 0;
  padding: 10px 12px;
  border: 1px solid #f0dcae;
  border-radius: var(--r);
  background: #fdf7e7;
  color: var(--warn);
  font-size: 13px;
}
[data-theme="dark"] .update-banner { border-color: #44371a; background: #241f10; }
.update-banner > svg { width: 16px; height: 16px; flex-shrink: 0; }
.update-text { flex: 1; min-width: 0; }
.update-text b { display: block; color: var(--text); font-size: 13.5px; font-weight: 700; }
.update-text span { display: block; margin-top: 2px; color: var(--muted); font-size: 12.5px; }
.update-banner .btn { padding: 8px 16px; font-size: 13px; white-space: nowrap; }
.update-banner.unsupported { border-color: #f3c4c0; background: #fdeceb; color: var(--bad); }
[data-theme="dark"] .update-banner.unsupported { border-color: #3d1e1b; background: #2a1614; }
.update-banner.unsupported .update-text b { color: var(--bad); }

.messages { flex: 1; min-height: 0; overflow-y: auto; padding: 28px 22px 8px; scroll-behavior: smooth; }

.empty-state { max-width: 520px; margin: 9vh auto 0; text-align: center; }
.empty-icon { width: 46px; height: 46px; margin: 0 auto; color: var(--text); }
.empty-state h2 { margin: 15px 0 0; font-size: 22px; font-weight: 800; letter-spacing: -0.02em; }
.empty-state p { margin: 7px 0 0; color: var(--muted-2); font-size: 14px; line-height: 1.6; }
.empty-chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 22px; }

.chip {
  padding: 7px 14px;
  border: 1px solid var(--border-2);
  border-radius: var(--pill);
  background: var(--bg);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
}
.chip:hover { background: var(--chip-hover); border-color: var(--faint); }

.message { max-width: 780px; margin: 0 auto 24px; }

/* Display-only status: errors, "stopped at the step limit". Not a bubble, and
   never sent to the model. */
.note-line {
  padding: 9px 12px;
  border-radius: var(--r-sm);
  background: var(--chip);
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.note-line.error { background: #fdeceb; color: var(--bad); }
[data-theme="dark"] .note-line.error { background: #2a1614; }
.message.from-agent .message-content { background: var(--bg); }
.message.from-user { display: flex; justify-content: flex-end; }
.message.from-user .message-content { background: var(--chip); max-width: 82%; }

.message-content {
  padding: 15px 18px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--bg);
  font-size: 14.5px;
  line-height: 1.68;
  overflow-wrap: anywhere;
}
.message-content > :first-child { margin-top: 0; }
.message-content > :last-child { margin-bottom: 0; }
.message-content p { margin: 0 0 12px; }
.message-content h1, .message-content h2, .message-content h3 {
  margin: 22px 0 10px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.015em;
}
.message-content ul, .message-content ol { margin: 0 0 12px; padding-left: 21px; }
.message-content li { margin: 5px 0; }
.message-content a { color: var(--accent); font-weight: 500; text-underline-offset: 2px; }
.message-content strong { font-weight: 700; }
.message-content em { font-style: italic; }

.message-content code {
  padding: 2px 5px;
  border-radius: 6px;
  background: var(--chip);
  font-family: var(--mono);
  font-size: 0.85em;
}
.message-content pre {
  overflow-x: auto;
  margin: 13px 0;
  padding: 15px 17px;
  border-radius: var(--r);
  background: var(--dark);
  color: #d6d9dd;
}
.message-content pre code { padding: 0; background: none; color: inherit; font-size: 12.5px; line-height: 1.7; white-space: pre; }

.typing { display: inline-flex; gap: 4px; padding: 5px 0; }
.typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--faint);
  animation: pulse 1.2s ease-in-out infinite;
}
.typing span:nth-child(2) { animation-delay: 0.16s; }
.typing span:nth-child(3) { animation-delay: 0.32s; }
@keyframes pulse { 0%, 60%, 100% { opacity: 0.25; } 30% { opacity: 1; } }

/* ─── Tool activity ─────────────────────────────────────────────────── */

.tool-list { display: grid; gap: 6px; }

.tool {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 11px;
  align-items: center;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--raised);
  font-family: var(--mono);
  font-size: 12px;
}
.tool-name { color: var(--accent); font-weight: 600; }
.tool.mutates .tool-name { color: var(--warn); }
.tool-args { overflow: hidden; color: var(--muted); text-overflow: ellipsis; white-space: nowrap; }
.tool-status { font-family: var(--font); font-size: 10.5px; font-weight: 700; letter-spacing: 0.05em; color: var(--faint); text-transform: uppercase; }
.tool[data-status="ok"] .tool-status { color: var(--ok); }
.tool[data-status="error"] { background: #fdeceb; border-color: #f6d9d7; }
.tool[data-status="error"] .tool-status { color: var(--bad); }
.tool[data-status="denied"] { background: #fdf7e7; border-color: #f2e6c4; }
.tool[data-status="denied"] .tool-status { color: var(--warn); }
[data-theme="dark"] .tool[data-status="error"] { background: #2a1614; border-color: #3d1e1b; }
[data-theme="dark"] .tool[data-status="denied"] { background: #241f10; border-color: #38301a; }

.steps { margin-top: 8px; color: var(--faint); font-size: 11.5px; }

/* ─── Agent trace (ported from the shadcn ai-agent-response pattern) ──── */

  50% { opacity: 0.95; transform: scale(1.1); }
}
  100% { background-position: -200% 0; }
}
@keyframes agent-fade {
  from { opacity: 0; transform: translateY(2px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes agent-spin { to { transform: rotate(360deg); } }

/* The collapsible "Working… / Worked for Ns" trigger */
.trace-head {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 2px;
  border-radius: 6px;
  font-size: 13.5px;
  color: var(--muted);
  transition: color 0.15s;
  text-align: left;
}
.trace-head:hover { color: var(--text); }
.trace-head .caret {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  opacity: 0.4;
  transition: transform 0.25s;
}
.trace-head[aria-expanded="true"] .caret { transform: rotate(180deg); }

/* Vertical timeline channel holding the tool rows */
/* Whole-block toggle: Working while tools run, Complete once settled. The caret
   points down when the work is visible and up when it is folded away. */
.trace-toggle {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  padding: 3px 6px 3px 2px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 600;
  transition: color 0.15s, background 0.15s;
}
.trace-toggle:hover { color: var(--text); background: var(--chip-hover); }
.trace-toggle-label { color: inherit; }
.trace-toggle .caret { width: 12px; height: 12px; opacity: 0.55; transition: transform 0.22s; }
/* Caret direction carries the state, so read it as: the arrow points the way
   the click will take you. Up means "show me the work"; down means "fold it
   away". Inverted caret states are the classic way to make a disclosure feel
   broken, so it is pinned here rather than left to the icon's default. */
.trace-toggle[aria-expanded="true"] .caret { transform: rotate(180deg); }
.trace-toggle-icon { display: grid; place-items: center; width: 14px; height: 14px; color: var(--muted); }
.trace-toggle-icon svg { width: 12px; height: 12px; }
.trace-toggle-icon[data-kind="ok"] { color: var(--ok); }
.trace-toggle-icon[data-kind="fail"] { color: var(--bad); }
.trace-toggle-icon[data-kind="busy"] { color: var(--accent); }

.trace-collapse {
  display: grid;
  transition: grid-template-rows 0.28s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.28s;
  grid-template-rows: 0fr;
  opacity: 0;
}
.trace-collapse.open { grid-template-rows: 1fr; opacity: 1; }
.trace-collapse > div { overflow: hidden; min-height: 0; }

.trace-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin: 0 0 0 8px;
  padding: 2px 0 2px 11px;
  border-left: 1px solid var(--border);
}
.trace { margin: 0 0 14px; }

.trace-row { animation: agent-fade 260ms cubic-bezier(0.23, 1, 0.32, 1) both; }

.trace-btn {
  display: flex;
  gap: 8px;
  align-items: center;
  width: 100%;
  min-height: 28px;
  padding: 3px 6px;
  border-radius: 6px;
  font-size: 12px;
  text-align: left;
  transition: background 0.15s;
}
.trace-btn.has-detail:hover { background: var(--chip-hover); }
.trace-btn:disabled { cursor: default; }

.trace-icon {
  display: grid;
  place-items: center;
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  color: var(--muted);
}
.trace-icon svg { width: 13px; height: 13px; }
svg.i { width: 13px; height: 13px; flex-shrink: 0; }
.trace-icon.spin::after {
  content: "";
  width: 11px;
  height: 11px;
  border: 1.5px solid var(--border-2);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: agent-spin 700ms linear infinite;
}
.trace-icon[data-kind="read"] { color: var(--muted); }
.trace-icon[data-kind="edit"] { color: var(--warn); }
.trace-icon[data-kind="command"] { color: var(--accent); }
.trace-icon[data-kind="search"] { color: #3b82f6; }
.trace-icon[data-kind="ok"] { color: var(--ok); }
.trace-icon[data-kind="fail"] { color: var(--bad); }
.trace-icon[data-kind="plan"] { color: var(--accent); }
.trace-icon[data-kind="memory"] { color: var(--accent); }

.trace-label { font-weight: 600; color: var(--text); white-space: nowrap; }
.trace-chip {
  display: inline-flex;
  align-items: center;
  max-width: 65%;
  min-width: 0;
  height: 20px;
  padding: 0 6px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--chip);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.trace-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.trace-btn:hover .trace-chip { border-color: var(--border-2); color: var(--text); }
.trace-timing { margin-left: auto; padding-left: 8px; font-family: var(--mono); font-size: 10.5px; color: var(--faint); font-variant-numeric: tabular-nums; }

.trace-detail {
  display: grid;
  transition: grid-template-rows 0.28s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.28s;
  grid-template-rows: 1fr;
  opacity: 1;
}
.trace-detail.collapsed { grid-template-rows: 0fr; opacity: 0; }
.trace-detail > div { overflow: hidden; min-height: 0; }
.trace-detail .inner { margin: 1px 0 5px 23px; display: flex; flex-direction: column; gap: 6px; }
.trace-foot { margin: 4px 0 6px 23px; color: var(--faint); font-size: 11.5px; }

.copy-btn {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--muted);
  font-size: 10.5px;
  transition: color 0.15s, background 0.15s;
}
.copy-btn:hover { color: var(--text); background: var(--chip-hover); }
.copy-btn svg { width: 11px; height: 11px; }

/* Terminal card */
.term {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 11.5px;
}
.term-head {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px;
  border-bottom: 1px solid var(--border);
  background: var(--chip);
  font-size: 11px;
}
.term-head .left { display: flex; gap: 7px; align-items: center; min-width: 0; }
.term-head .left svg { width: 13px; height: 13px; flex-shrink: 0; color: var(--accent); }
.term-head .prompt-sign { color: var(--faint); font-weight: 700; }
.term-head .cmd { overflow: hidden; color: var(--text); font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.term-head .right { display: flex; gap: 8px; align-items: center; flex-shrink: 0; }
.term-ms { color: var(--faint); font-variant-numeric: tabular-nums; }
.term-badge { padding: 1px 6px; border-radius: 5px; font-size: 10px; font-weight: 700; font-variant-numeric: tabular-nums; }
.term-badge.ok { background: #e9f7f0; color: var(--ok); }
.term-badge.fail { background: #fdeceb; color: var(--bad); }
.term-badge.run { background: var(--accent-soft); color: var(--accent); }
[data-theme="dark"] .term-badge.ok { background: #10231a; }
[data-theme="dark"] .term-badge.fail { background: #2a1614; }
.term-out {
  overflow-x: auto;
  max-height: 340px;
  overflow-y: auto;
  padding: 9px 11px;
  background: var(--raised);
  font-size: 11px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}
.term-out .l-pass { color: var(--ok); }
.term-out .l-fail { color: var(--bad); }
.term-out .l-warn { color: var(--warn); }

/* Diff card */
.diff { display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--border); border-radius: var(--r-sm); background: var(--bg); font-family: var(--mono); font-size: 11.5px; }
.diff-head { display: flex; gap: 8px; align-items: center; justify-content: space-between; padding: 5px 8px; border-bottom: 1px solid var(--border); background: var(--chip); font-size: 11px; }
.diff-head .f { overflow: hidden; color: var(--text); font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.diff-body { overflow: auto; max-height: 380px; padding: 4px 0; }
.diff-row { display: grid; grid-template-columns: 30px 30px 18px minmax(0, 1fr); align-items: stretch; line-height: 19px; }
.diff-row.add { background: rgba(26, 156, 107, 0.1); }
.diff-row.del { background: rgba(212, 84, 79, 0.1); }
.diff-row.add::before { content: ""; background: var(--ok); }
.diff-row.del::before { content: ""; background: repeating-linear-gradient(45deg, #ef4444 0, #ef4444 1.5px, transparent 1.5px, transparent 3px); }
.diff-row.add::before, .diff-row.del::before { grid-column: 1; margin: 0; }
.diff-row .n { padding-right: 6px; text-align: right; font-size: 10.5px; color: var(--faint); font-variant-numeric: tabular-nums; }
.diff-row.add .n.cur, .diff-row.del .n.old { color: inherit; font-weight: 600; }
.diff-row .m { text-align: center; font-weight: 700; }
.diff-row.add .m, .diff-row.add .n.cur { color: var(--ok); }
.diff-row.del .m, .diff-row.del .n.old { color: var(--bad); }
.diff-row .c { padding: 0 8px 0 3px; white-space: pre; }
.diff-row.add .c { color: var(--text); font-weight: 500; }
.diff-row.del .c { color: var(--text); text-decoration: line-through; opacity: 0.8; }
.diff-row.ctx .c { color: var(--muted); }
[data-theme="dark"] .diff-row.add { background: rgba(26, 156, 107, 0.16); }
[data-theme="dark"] .diff-row.del { background: rgba(212, 84, 79, 0.16); }

/* Generic detail lines */
.trace-lines { display: flex; flex-direction: column; gap: 3px; padding: 7px 9px; border-radius: var(--r-sm); background: var(--chip); font-family: var(--mono); font-size: 11px; line-height: 1.5; }
.trace-lines div { color: var(--muted); white-space: pre-wrap; word-break: break-word; }
.trace-lines div.ok { color: var(--ok); }
.trace-lines div.fail { color: var(--bad); }
.trace-lines div.mono-ctx { color: var(--muted); }

/* Todo panel inside the trace */
.plan { display: flex; flex-direction: column; gap: 2px; padding: 8px 10px; border-radius: var(--r-sm); background: var(--chip); font-size: 11.5px; }
.plan .row-i { display: flex; gap: 7px; align-items: baseline; color: var(--muted); }
.plan .row-i.done { color: var(--faint); text-decoration: line-through; }
.plan .row-i.now { color: var(--text); font-weight: 600; }
.plan .row-i .m { font-family: var(--mono); font-size: 10.5px; flex-shrink: 0; }
.plan .row-i.done .m { color: var(--ok); }
.plan .row-i.now .m { color: var(--accent); }

/* ─── Composer ──────────────────────────────────────────────────────── */

/* ─── Composer (ported from the shadcn prompt-composer pattern) ──────── */

.input-bar { padding: 10px 18px 14px; }

.composer {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  border: 1px solid var(--border-2);
  border-radius: var(--r-lg);
  background: var(--bg);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.composer:focus-within { border-color: var(--text); box-shadow: 0 0 0 3px var(--accent-soft); }

/* Attachment chips */
.attach-list { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 12px 0; }
.attach {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  padding: 4px 5px 4px 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--chip);
}
.attach .nm { max-width: 140px; overflow: hidden; font-size: 11.5px; font-weight: 500; color: var(--text); text-overflow: ellipsis; white-space: nowrap; }
.attach .sz { font-family: var(--mono); font-size: 10px; color: var(--faint); font-variant-numeric: tabular-nums; }
.attach .rm { display: grid; place-items: center; padding: 3px; border-radius: 4px; color: var(--muted); transition: color 0.15s, background 0.15s; }
.attach .rm:hover { color: var(--bad); background: var(--bg); }
.attach .rm svg { width: 11px; height: 11px; }

.composer textarea {
  width: 100%;
  max-height: 132px;
  padding: 12px 14px 0;
  border: 0;
  background: none;
  font-size: 13.5px;
  line-height: 1.6;
  resize: none;
  outline: none;
}
.composer textarea::placeholder { color: var(--muted-2); }

.composer-bar { display: flex; gap: 8px; align-items: center; justify-content: space-between; padding: 8px 9px 9px 9px; }
.composer-bar .left { display: flex; gap: 4px; align-items: center; min-width: 0; }
.composer-bar .right { display: flex; gap: 10px; align-items: center; flex-shrink: 0; }

.icon-btn {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 8px;
  color: var(--muted);
  transition: color 0.15s, background 0.15s, transform 0.12s;
}
.icon-btn:hover { color: var(--text); background: var(--chip-hover); }
.icon-btn:active { transform: scale(0.94); }
.icon-btn svg { width: 14px; height: 14px; }

/* Model picker trigger */
.model-trigger {
  display: inline-flex;
  gap: 5px;
  align-items: center;
  min-width: 0;
  max-width: 190px;
  padding: 5px 8px;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  transition: color 0.15s, background 0.15s;
}
.model-trigger:hover { color: var(--text); background: var(--chip-hover); }
.model-trigger .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.model-trigger svg { width: 12px; height: 12px; flex-shrink: 0; transition: transform 0.2s; }
.model-trigger[aria-expanded="true"] svg { transform: rotate(180deg); }

.model-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  z-index: 20;
  width: 240px;
  max-height: 280px;
  overflow-y: auto;
  margin: 0;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--bg);
  box-shadow: var(--shadow);
  list-style: none;
}
.model-menu li button {
  display: flex;
  gap: 8px;
  align-items: center;
  width: 100%;
  padding: 7px 8px;
  border-radius: 8px;
  text-align: left;
  transition: background 0.15s;
}
.model-menu li button:hover { background: var(--chip-hover); }
.model-menu .t { min-width: 0; flex: 1; }
.model-menu .t b { display: block; font-size: 12.5px; font-weight: 600; color: var(--text); }
.model-menu .t small { display: block; font-size: 11px; color: var(--faint); }
.model-menu .tick { width: 14px; height: 14px; flex-shrink: 0; color: var(--text); }

.count { font-family: var(--mono); font-size: 10.5px; color: var(--faint); font-variant-numeric: tabular-nums; }
.count.near { color: var(--warn); }

/* Send / stop toggle */
.send-toggle {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  color: var(--bg);
  background: var(--dark);
  transition: transform 0.16s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.16s;
}
.send-toggle:hover:not(:disabled) { transform: scale(1.06); }
.send-toggle:active { transform: scale(0.92); }
.send-toggle:disabled { opacity: 0.3; cursor: not-allowed; }
.send-toggle .glyph { position: relative; display: grid; place-items: center; width: 14px; height: 14px; }
.send-toggle .glyph svg {
  position: absolute;
  width: 14px;
  height: 14px;
  transition: opacity 0.2s cubic-bezier(0.23, 1, 0.32, 1), filter 0.2s;
}
.send-toggle .glyph .ic-send { opacity: 1; filter: none; }
.send-toggle .glyph .ic-stop { opacity: 0; filter: blur(2px); }
.send-toggle.generating .glyph .ic-send { opacity: 0; filter: blur(2px); }
.send-toggle.generating .glyph .ic-stop { opacity: 1; filter: none; }

.hint { max-width: 780px; margin: 9px auto 0; color: var(--faint); font-size: 11.5px; text-align: center; }

/* ─── Modals ────────────────────────────────────────────────────────── */

.modal { position: fixed; inset: 0; display: none; place-items: center; padding: 20px; background: rgba(16, 17, 18, 0.4); z-index: 50; }
.modal.open { display: grid; }

.modal-card {
  display: flex;
  flex-direction: column;
  width: min(660px, 100%);
  max-height: 86dvh;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--bg);
  box-shadow: var(--shadow);
}

.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.modal-head h3 { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: -0.02em; }
.modal-body { display: grid; gap: 10px; padding: 22px 24px 26px; overflow-y: auto; }

.label { margin: 10px 0 0; font-size: 11px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }

.field, .area, .select-field {
  width: 100%;
  padding: 10px 13px;
  border: 1px solid var(--border-2);
  border-radius: var(--r);
  background: var(--chip);
  font-size: 13.5px;
  transition: box-shadow 0.15s, background 0.15s;
}
.field::placeholder, .area::placeholder { color: var(--muted-2); }
.field:focus, .area:focus, .select-field:focus {
  outline: none;
  background: var(--bg);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.area { min-height: 100px; font-family: var(--mono); font-size: 12px; line-height: 1.65; resize: vertical; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.btn {
  padding: 11px 20px;
  border-radius: var(--pill);
  color: var(--bg);
  background: var(--dark);
  font-size: 13.5px;
  font-weight: 600;
  transition: transform 0.15s, background 0.15s;
}
.btn:hover:not(:disabled) { transform: scale(0.985); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn.ghost { color: var(--text); background: var(--bg); box-shadow: inset 0 0 0 1px var(--border-2); }
.btn.ghost:hover { background: var(--chip-hover); }
.btn.accent { background: var(--accent); }
.btn.danger { color: var(--bad); background: #fdeceb; }
[data-theme="dark"] .btn.danger { background: #2a1614; }

.theme-row { display: flex; gap: 8px; }
.theme-row .btn { flex: 1; }
.theme-row .btn.active { color: var(--accent); background: var(--accent-soft); box-shadow: none; }

.tool-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.tool-toggle {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  padding: 8px 14px;
  border: 1px solid var(--border-2);
  border-radius: var(--pill);
  background: var(--bg);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.tool-toggle:hover { background: var(--chip-hover); }
.tool-toggle input { accent-color: var(--accent); width: 13px; height: 13px; }
.tool-toggle:has(input:checked) { background: var(--accent-soft); border-color: transparent; color: var(--accent); }

.plugin-row {
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--raised);
}
.plugin-row b { display: block; font-size: 13.5px; font-weight: 700; }
.plugin-row small { display: block; margin-top: 3px; color: var(--muted); font-size: 12.5px; line-height: 1.5; }
.plugin-hooks { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.plugin-hooks span { padding: 3px 9px; border-radius: 7px; background: var(--chip); font-family: var(--mono); font-size: 10.5px; color: var(--muted); }

.note { padding: 12px 14px; border-radius: var(--r); background: var(--accent-soft); color: var(--accent); font-size: 12.5px; line-height: 1.6; }
.note.error { background: #fdeceb; color: var(--bad); }
[data-theme="dark"] .note.error { background: #2a1614; }
.mono-small { color: var(--muted); font-size: 12.5px; line-height: 1.6; overflow-wrap: anywhere; }

.hamburger { display: none; }
.scrim { display: none; }

/* ─── Responsive ────────────────────────────────────────────────────── */

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    z-index: 40;
    inset: 0 auto 0 0;
    width: min(288px, 85vw);
    background: var(--bg);
    box-shadow: var(--shadow);
    transform: translateX(-102%);
    transition: transform 0.2s ease;
  }
  .sidebar.open { transform: none; }
  .scrim { position: fixed; z-index: 30; inset: 0; background: rgba(16, 17, 18, 0.4); }
  .scrim.open { display: block; }
  .hamburger { display: grid; }
  .row { grid-template-columns: 1fr; }
  .select { max-width: 132px; }
  .hint { display: none; }
}

@media (max-width: 520px) {
  .messages { padding: 20px 13px 6px; }
  .input-bar { padding: 8px 11px 12px; }
  .badge { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .messages { scroll-behavior: auto; }
}