:root {
  /* JJCW brand: sage #C4CEC2 · sky #A4DBE8 · brand blue #007CB7 (light backgrounds) */
  --bg: #eef3f5;          /* light cool wash behind the card */
  --card: #ffffff;
  --tan: #a4dbe8;         /* sky — hero color in the header */
  --tan-ring: #c4cec2;    /* sage — borders / connective tissue */
  --ink: #233038;         /* cool charcoal text */
  --muted: #6b7c84;
  --simon: #eaf6fb;       /* light sky tint — Simon's bubble */
  --user: #007cb7;        /* brand blue — the prominent action color */
  --user-dark: #00689a;   /* hover/active for brand blue */
  --user-ink: #ffffff;
  --shadow: 0 10px 40px rgba(0, 70, 105, 0.13);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
}

.app {
  width: 100%;
  max-width: 560px;
  height: min(88vh, 760px);
  background: var(--card);
  border-radius: 20px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── top bar with Simon ───────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: linear-gradient(180deg, var(--tan) 0%, #cfeef6 100%);
  border-bottom: 1px solid var(--tan-ring);
}
.avatar {
  width: 77px; height: 77px;   /* 20% larger than the original 64px */
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--user);
  background: var(--tan);
  flex: 0 0 auto;
  box-shadow: 0 2px 8px rgba(60,50,30,0.15);
  transition: transform 0.18s ease;
}
.avatar.speaking { transform: scale(1.04); }
.avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.avatar-fallback {
  width: 100%; height: 100%;
  display: none; align-items: center; justify-content: center;
  font-size: 32px;
}
.titles h1 { margin: 0; font-size: 22px; letter-spacing: 0.2px; color: var(--user); }
.subtitle { margin: 2px 0 0; font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #9bbf9b; display: inline-block;
}
.status-dot.thinking { background: #e0a85e; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

/* ── messages ─────────────────────────────────────────── */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.msg { display: flex; }
.msg.user { justify-content: flex-end; }
.col { display: flex; flex-direction: column; align-items: flex-start; max-width: 80%; }
.msg.user .col { align-items: flex-end; }
.bubble {
  max-width: 100%;
  padding: 11px 15px;
  border-radius: 16px;
  line-height: 1.45;
  font-size: 15px;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg.simon .bubble {
  background: var(--simon);
  border: 1px solid var(--tan-ring);
  border-bottom-left-radius: 4px;
}
.msg.user .bubble {
  background: var(--user);
  color: var(--user-ink);
  border-bottom-right-radius: 4px;
}
/* rendered markdown inside Simon's bubbles */
.bubble p { margin: 0 0 8px; }
.bubble > p:last-child, .bubble > ul:last-child, .bubble > ol:last-child { margin-bottom: 0; }
.bubble ul, .bubble ol { margin: 4px 0 8px; padding-left: 22px; }
.bubble li { margin: 3px 0; }
.bubble li::marker { color: var(--muted); }
.bubble h4 { margin: 10px 0 4px; font-size: 15px; font-weight: 700; }
.bubble strong { font-weight: 700; }
.bubble code {
  background: rgba(0, 124, 183, 0.09);
  padding: 1px 5px; border-radius: 5px;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 0.88em;
}
.bubble pre {
  background: rgba(0, 124, 183, 0.07);
  padding: 9px 11px; border-radius: 8px; overflow-x: auto; margin: 6px 0;
}
.bubble pre code { background: none; padding: 0; font-size: 0.85em; }

/* feedback under Simon's answers — buttons → full-width note panel → sent (note kept) */
.feedback { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: -4px 2px 2px; }
.fb-q { font-size: 12px; color: var(--muted); }
.fb-btn {
  border: 1px solid var(--tan-ring); background: #fff; cursor: pointer;
  border-radius: 8px; padding: 3px 10px; font-size: 14px; line-height: 1.4;
  transition: background 0.15s, border-color 0.15s;
}
.fb-btn:hover { background: var(--tan); }

/* note panel — fills the width, clearly distinct from chat bubbles */
.feedback.fb-open {
  display: block; box-sizing: border-box; width: 100%;
  background: #f1f8fb; border: 1px solid var(--tan-ring);
  border-left: 4px solid var(--user); border-radius: 10px; padding: 12px 14px;
}
.fb-label { display: block; font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.fb-label span { font-weight: 400; color: var(--muted); }
.fb-note {
  width: 100%; box-sizing: border-box; resize: vertical; font: inherit; font-size: 14px;
  padding: 8px 10px; border: 1px solid var(--tan-ring); border-radius: 8px; outline: none;
}
.fb-note:focus { border-color: var(--user); }
.fb-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 8px; }
.fb-cancel { background: #fff; }
.fb-send { background: var(--user); color: #fff; border-color: var(--user); font-weight: 600; }
.fb-send:hover { background: var(--user-dark); }

/* after sending — distinct confirmation card that keeps what they wrote */
.feedback.fb-sent {
  display: block; box-sizing: border-box; width: 100%;
  background: #eef6ee; border: 1px solid #cfe3cf; border-left: 4px solid #6fae6f;
  border-radius: 10px; padding: 10px 13px;
}
.fb-msg { font-size: 13px; color: var(--ink); }
.fb-you { font-weight: 600; }
.fb-err { color: #b3261e; margin-top: 6px; }

/* provenance footer under Simon's answers — honest grounding, subtle */
.provenance { font-size: 11px; color: var(--muted); margin: 4px 2px 0; font-style: italic; }
.provenance a { color: var(--user); text-decoration: none; }
.provenance a:hover { text-decoration: underline; }

.bubble .cursor { display: inline-block; width: 7px; background: var(--muted); animation: blink 1s steps(2) infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0; } }

/* ── composer ─────────────────────────────────────────── */
.composer {
  display: flex;
  gap: 10px;
  padding: 14px;
  border-top: 1px solid var(--tan-ring);
  background: #f1f7f9;
}
#input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--tan-ring);
  border-radius: 24px;
  font-size: 15px;
  outline: none;
  background: #fff;
}
#input:focus { border-color: var(--user); }
#send {
  padding: 0 22px;
  border: none;
  border-radius: 24px;
  background: var(--user);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
#send:hover:not(:disabled) { background: var(--user-dark); }
#send:disabled { opacity: 0.5; cursor: default; }

/* ── account / sign-out (topbar) ──────────────────────── */
.account { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.account[hidden] { display: none; }
.acct-email {
  font-size: 12px; color: var(--ink); opacity: 0.85; max-width: 190px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.acct-out {
  background: #fff; border: 1px solid var(--tan-ring); border-radius: 8px;
  padding: 4px 10px; font-size: 12px; color: var(--ink); cursor: pointer;
}
.acct-out:hover { background: var(--tan); }

/* ── sign-in overlay ──────────────────────────────────── */
.signin {
  position: fixed; inset: 0; z-index: 100; padding: 20px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--tan) 0%, #cfeef6 100%);
}
.signin[hidden] { display: none; }
.signin-card {
  background: #fff; border-radius: 16px; box-shadow: 0 12px 44px rgba(0, 0, 0, 0.16);
  padding: 30px 30px 26px; width: 100%; max-width: 430px; text-align: center;
}
.signin-logo {
  width: 84px; height: 84px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--user); margin-bottom: 12px;
}
.signin-card h2 { margin: 0 0 2px; color: var(--user); font-size: 22px; }
.signin-tag { color: var(--ink); font-size: 14px; font-weight: 600; margin: 0 0 16px; }
.signin-intro { color: var(--ink); font-size: 14px; line-height: 1.5; margin: 0 0 10px; text-align: left; }
.signin-examples {
  text-align: left; margin: 0 0 14px; padding-left: 18px; color: var(--user-dark);
  font-size: 13.5px; line-height: 1.7; font-style: italic;
}
.signin-examples li { margin: 0; }
.signin-cta { color: var(--ink); font-size: 14px; margin: 4px 0 16px; text-align: left; }
#gbtn { display: flex; justify-content: center; }
.devsignin { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--tan-ring); }
.devsignin[hidden] { display: none; }
.dev-hint { font-size: 12px; color: var(--muted); margin: 0 0 8px; }
.devsignin input {
  width: 100%; box-sizing: border-box; padding: 9px 11px; font: inherit; font-size: 14px;
  border: 1px solid var(--tan-ring); border-radius: 8px; margin-bottom: 8px; outline: none;
}
.devsignin input:focus { border-color: var(--user); }
.devsignin button {
  background: var(--user); color: #fff; border: none; border-radius: 8px;
  padding: 8px 16px; font: inherit; font-weight: 600; cursor: pointer;
}
.devsignin button:hover { background: var(--user-dark); }
.signin-error { color: #b3261e; font-size: 13px; min-height: 1em; margin: 14px 0 0; }