:root {
  --ink: #1d1d1b;
  --muted: #6b6b66;
  --line: #e4e2dc;
  --bg: #f6f5f1;
  --card: #ffffff;
  --accent: #2f4a3a;
  --accent-ink: #ffffff;
  --user: #e9efe9;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; }
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; letter-spacing: 0.12em; font-size: 15px; }
.brand span { font-weight: 400; letter-spacing: 0; color: var(--muted); margin-left: 6px; }
.who { font-size: 14px; color: var(--muted); display: flex; gap: 12px; align-items: center; }
button.link { background: none; border: 0; color: var(--accent); cursor: pointer; font: inherit; padding: 0; text-decoration: underline; }

.card {
  max-width: 440px; margin: 12vh auto 0; background: var(--card); border: 1px solid var(--line);
  border-radius: 10px; padding: 32px;
}
.card h1 { margin: 0 0 8px; font-size: 22px; }
.card p { color: var(--muted); line-height: 1.5; }
.button {
  display: inline-block; margin-top: 12px; background: var(--accent); color: var(--accent-ink);
  padding: 10px 18px; border-radius: 6px; text-decoration: none; font-weight: 600;
}

#chat { flex: 1; display: flex; flex-direction: column; width: 100%; max-width: 820px; margin: 0 auto; padding: 0 16px; }
#log { flex: 1; padding: 24px 0; display: flex; flex-direction: column; gap: 14px; }
.intro p { color: var(--muted); line-height: 1.5; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chip {
  background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 7px 14px;
  font: inherit; font-size: 14px; cursor: pointer; color: var(--ink);
}
.chip:hover { border-color: var(--accent); }

.msg { padding: 12px 16px; border-radius: 10px; line-height: 1.5; max-width: 92%; font-size: 15px; }
.msg p { margin: 0 0 8px; }
.msg p:last-child { margin-bottom: 0; }
.msg ul { margin: 4px 0 8px; padding-left: 20px; }
.msg h3 { font-size: 15px; margin: 8px 0 4px; }
.msg code { background: #f0efe9; padding: 1px 4px; border-radius: 3px; font-size: 13px; }
.msg.user { align-self: flex-end; background: var(--user); }
.msg.assistant { align-self: flex-start; background: var(--card); border: 1px solid var(--line); }
.msg.pending { color: var(--muted); }
.msg.error { border-color: #c9a39b; }

form#ask {
  position: sticky; bottom: 0; display: flex; gap: 8px; padding: 12px 0;
  background: var(--bg);
}
textarea {
  flex: 1; resize: none; font: inherit; font-size: 15px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--card);
}
textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
#send {
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px;
  padding: 0 20px; font: inherit; font-weight: 600; cursor: pointer;
}
#send:disabled { opacity: 0.5; cursor: wait; }
.foot { color: var(--muted); font-size: 12px; text-align: center; margin: 0 0 12px; }
body.plain main.card { margin-top: 16vh; }
.signin-form { display: flex; flex-direction: column; gap: 12px; margin-top: 16px; }
.signin-form label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }
.signin-form input {
  font: inherit; font-size: 15px; padding: 9px 11px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink);
}
.signin-form button { border: 0; cursor: pointer; font: inherit; font-weight: 600; align-self: flex-start; }
.error-text { color: #9a3b2e; margin: 0; font-size: 14px; }
[hidden] { display: none !important; }

.tip { font-size: 13px; margin-top: 16px; }
@media (min-width: 821px) { .tip { display: none; } }

/* Phone */
header { padding-top: max(14px, env(safe-area-inset-top)); }
form#ask { padding-bottom: max(12px, env(safe-area-inset-bottom)); }
textarea, .signin-form input { font-size: 16px; } /* stops iOS zooming in on focus */
@media (max-width: 600px) {
  header { padding-left: 16px; padding-right: 16px; }
  .card { margin: 8vh 16px 0; padding: 24px; }
  #chat { padding: 0 12px; }
  #log { padding: 16px 0; }
  .msg { max-width: 100%; font-size: 15px; }
  .chip { font-size: 14px; text-align: left; }
  .foot { font-size: 11px; }
}

/* "Not right?" feedback */
.fb { align-self: flex-start; margin-top: -8px; font-size: 13px; max-width: 92%; width: 100%; }
.fb .link { color: var(--muted); font-size: 13px; }
.fb-form { display: flex; gap: 8px; margin-top: 6px; }
.fb-form textarea { font-size: 14px; }
.fb-form button { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px; padding: 0 16px; font: inherit; font-weight: 600; cursor: pointer; }
.fb-done { color: var(--muted); margin: 0; }

/* Review page */
body.review header a { color: var(--accent); }
.rv-wrap { max-width: 900px; margin: 0 auto; padding: 16px; width: 100%; }
.rv-wrap h2 { font-size: 17px; margin: 24px 0 8px; }
.rv { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; margin-bottom: 8px; }
.rv.flag { border-color: #c9a39b; border-left: 4px solid #b5533f; }
.rv.err { border-left: 4px solid #999; }
.rv p { margin: 0 0 4px; }
.rv-meta { color: var(--muted); font-size: 13px; }
.rv-comment { font-weight: 600; }
.rv-q { font-size: 15px; }
.rv details summary { color: var(--muted); font-size: 13px; cursor: pointer; }
.rv pre { white-space: pre-wrap; font: inherit; font-size: 14px; margin: 6px 0 0; }

/* Walkthrough video page */
.watch { max-width: 820px; width: 100%; margin: 0 auto; padding: 20px 16px 32px; }
.watch h1 { font-size: 22px; margin: 0 0 6px; }
.watch p { color: var(--muted); line-height: 1.5; margin: 0 0 14px; }
.watch video { width: 100%; border-radius: 10px; background: #000; display: block; margin-bottom: 16px; }
.watch .tip { display: block; margin-top: 14px; }

/* "Add to my home screen" / "Install on this computer" */
.install-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  margin-top: 16px; padding: 12px 16px; background: var(--card); border: 1px solid var(--line);
  border-left: 4px solid var(--accent); border-radius: 10px;
}
.install-bar p { margin: 0; font-size: 15px; }
.install-actions { display: flex; align-items: center; gap: 14px; }
.install-actions .link { color: var(--muted); font-size: 14px; }
.install-btn {
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px;
  padding: 10px 16px; font: inherit; font-weight: 600; font-size: 15px; cursor: pointer;
}
.install-top { font-size: 14px; }
.install-guide {
  position: fixed; inset: 0; z-index: 10; display: flex; align-items: flex-end; justify-content: center;
  background: rgba(29, 29, 27, 0.45); padding: 16px;
}
.ig-card {
  width: 100%; max-width: 440px; background: var(--card); border-radius: 14px; padding: 22px 22px 18px;
  margin-bottom: max(8px, env(safe-area-inset-bottom));
}
.ig-card h2 { margin: 0 0 10px; font-size: 19px; }
.ig-card ol { margin: 0 0 16px; padding-left: 22px; line-height: 1.55; font-size: 15px; }
.ig-card li { margin-bottom: 8px; }
.ig-card .install-btn { width: 100%; }
.ig-icon { display: inline-block; border: 1px solid var(--line); border-radius: 4px; padding: 0 5px; font-size: 13px; }
@media (min-width: 601px) { .install-guide { align-items: center; } }
@media (max-width: 600px) { .install-top { display: none; } .install-bar { margin-top: 12px; } }
.install-foot { font-size: 13px; }
@media (min-width: 601px) { .install-foot { display: none; } }

/* Drafted note under an answer: check, edit, post to Monday */
.note-card { margin: 4px 0 12px; padding: 12px 14px; border: 1px solid #c9d6ce; border-left: 4px solid #2f4a3a; border-radius: 10px; background: #fff; }
.note-head { margin: 0 0 8px; font-weight: 600; font-size: 0.92rem; color: #2f4a3a; }
.note-text { width: 100%; box-sizing: border-box; font: inherit; font-size: 0.95rem; padding: 8px 10px; border: 1px solid #d6d5d1; border-radius: 8px; resize: vertical; }
.note-for { margin: 6px 0 0; font-size: 0.88rem; color: #555; }
.note-actions { display: flex; gap: 14px; align-items: center; margin-top: 10px; }
.note-msg { margin: 8px 0 0; font-size: 0.88rem; color: #8a3b2e; }
.note-done { margin: 0; font-size: 0.92rem; color: #2f4a3a; }
.note-done a { margin-left: 4px; }