:root {
  --bg: #fbfaf8;
  --panel: #ffffff;
  --ink: #171614;
  --muted: #6c6862;
  --line: #e2ded7;
  --accent: #7a3b2e;
  --code-bg: #f4f2ee;
  --user: #2f5d8a;
  --assistant: #7a3b2e;
  --system: #6c6862;
  --tool: #3f6b4a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131311;
    --panel: #1b1b19;
    --ink: #eae7e1;
    --muted: #9a958d;
    --line: #2e2d2a;
    --accent: #d99479;
    --code-bg: #21201d;
    --user: #8ab4e0;
    --assistant: #d99479;
    --system: #9a958d;
    --tool: #8dc39c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 ui-sans-serif, -apple-system, "Segoe UI", Inter, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 54rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 5rem;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }

/* ---------- chrome ---------- */

.topbar {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  max-width: 54rem;
  margin: 0 auto;
}
.wordmark {
  font: 600 15px/1 ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  letter-spacing: -.02em;
  color: var(--ink);
  text-decoration: none;
}
.tagline { color: var(--muted); font-size: 13px; }
.whoami { margin-left: auto; color: var(--muted); font-size: 12px;
  font-family: ui-monospace, Menlo, monospace; }

/* Kept in the layout (so .select() works) but out of sight. */
.offscreen { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

/* ---------- forms ---------- */

.row { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.row.actions { margin-top: .75rem; }

input[type=text], input[type=password], textarea {
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .5rem .65rem;
}
input[type=text] { flex: 1 1 16rem; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

textarea {
  width: 100%;
  min-height: 22rem;
  margin-top: .5rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.55;
  resize: vertical;
}

button, .btn {
  display: inline-block;
  font: 500 14px/1 inherit;
  padding: .6rem 1rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: var(--bg);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
button:hover, .btn:hover { filter: brightness(1.08); }
.btn.ghost, button.ghost {
  background: transparent;
  color: var(--accent);
  border-color: var(--line);
}

.restrict { margin-top: .9rem; }
.restrict input { width: 100%; }
.restrict .hint { margin: .35rem 0 0; }

.lock { color: var(--accent); }
.trace-head .actions { margin-top: .9rem; }

.hint, .meta { color: var(--muted); font-size: 13px; }
.warn { color: var(--muted); font-size: 14px; max-width: 42rem; }

/* ---------- docs ---------- */

.docs { margin-top: 3rem; border-top: 1px solid var(--line); padding-top: 1.5rem; }
.docs h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 600; }
.docs em { color: var(--accent); font-style: normal; }
.docs p { font-size: 13.5px; color: var(--muted); }
pre, code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 12.5px;
}
.docs pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .85rem 1rem;
  overflow-x: auto;
}

/* ---------- created ---------- */

.created h1 { font-size: 1.35rem; margin: 1rem 0 1rem; letter-spacing: -.01em; }
#share-url { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }

/* ---------- trace ---------- */

.trace-head { border-bottom: 1px solid var(--line); padding-bottom: 1rem; margin-bottom: 1.5rem; }
.trace-head h1 { font-size: 1.35rem; margin: 0 0 .35rem; letter-spacing: -.01em; }
.trace-head .meta { margin: 0; }

.kv { display: grid; grid-template-columns: auto 1fr; gap: .15rem 1rem; margin: .75rem 0 0; font-size: 13px; }
.kv dt { color: var(--muted); font-family: ui-monospace, Menlo, monospace; }
.kv dd { margin: 0; }

.msg { display: grid; grid-template-columns: 6.5rem 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.msg-role {
  font: 600 11px/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--muted);
  padding-top: .15rem;
}
.role-user .msg-role { color: var(--user); }
.role-assistant .msg-role { color: var(--assistant); }
.role-tool .msg-role { color: var(--tool); }
.msg-name { display: block; text-transform: none; letter-spacing: 0; font-weight: 400; opacity: .75; }
.msg-body { min-width: 0; }

.block + .block { margin-top: .7rem; }
.block.text { white-space: pre-wrap; overflow-wrap: anywhere; }
.block.note { color: var(--muted); font-size: 13px; font-style: italic; }

.block.thinking { color: var(--muted); font-size: 14px; }
.block.thinking summary { cursor: pointer; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.block.thinking div { white-space: pre-wrap; margin-top: .4rem; padding-left: .75rem; border-left: 2px solid var(--line); }

.block.tool { border-left: 2px solid var(--tool); padding-left: .75rem; }
.block.tool-error { border-left-color: #b4553f; }
.tool-head { font: 600 12px/1.5 ui-monospace, Menlo, monospace; color: var(--tool); }
.tool-error .tool-head { color: #b4553f; }

pre.block, pre.doc, .block.tool pre {
  background: var(--code-bg);
  border-radius: 5px;
  padding: .6rem .75rem;
  margin: .35rem 0 0;
  /* Tool output is mostly long unbroken lines; wrapping beats a horizontal
     scrollbar per block. Indentation survives via pre-wrap. */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 30rem;
  overflow-y: auto;
}
pre.doc { white-space: pre-wrap; overflow-wrap: anywhere; max-height: none; padding: 1rem; }

@media (max-width: 34rem) {
  .msg { grid-template-columns: 1fr; gap: .35rem; }
}