:root {
  --gold: #CC9900;
  --gold-bright: #F8C119;
  --gold-mid: #E4A500;
  --charcoal: #1B2227;
  --text: #333333;
  --muted: #6b7378;
  --bg: #F5F5F5;
  --panel: #FFFFFF;
  --line: #e2e4e6;
  --error: #b3261e;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8eaeb;
    --muted: #9aa3a8;
    --bg: #12171a;
    --panel: #1B2227;
    --line: #2c353b;
    --error: #ff8a80;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 Roboto, Arial, sans-serif;
  display: flex;
  flex-direction: column;
}
[hidden] { display: none !important; }

.bar {
  background: var(--charcoal);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  gap: 12px;
  border-bottom: 3px solid var(--gold);
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 16px; }
.brand b { font-weight: 700; margin-right: 6px; }
.who { display: flex; align-items: center; gap: 8px; font-size: 13px; }
#who-name { opacity: .85; margin-right: 4px; }

button, .button {
  font: inherit;
  border: 0;
  border-radius: 6px;
  padding: 9px 16px;
  background: var(--gold-mid);
  color: #1B2227;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:hover, .button:hover { background: var(--gold-bright); }
button:disabled { opacity: .5; cursor: default; }
button.ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.35); padding: 5px 10px; }
button.ghost:hover { border-color: var(--gold-bright); color: var(--gold-bright); background: transparent; }

.signin { max-width: 560px; margin: 12vh auto 0; padding: 0 16px; }
.signin h1 { font-weight: 700; color: var(--gold); line-height: 1.25; }

.chat {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 16px;
}
.log { flex: 1; overflow-y: auto; padding: 20px 0 8px; }
.intro h2 { font-weight: 700; margin: 8vh 0 14px; }
.examples { display: flex; flex-wrap: wrap; gap: 8px; }
.example {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--line);
  font-weight: 400;
  text-align: left;
}
.example:hover { border-color: var(--gold); background: var(--panel); }

.msg { margin: 14px 0; }
.msg.user {
  margin-left: auto;
  max-width: 80%;
  width: fit-content;
  background: var(--charcoal);
  color: #fff;
  padding: 9px 14px;
  border-radius: 12px 12px 2px 12px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.msg.bot {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  padding: 10px 16px;
  border-radius: 4px 12px 12px 12px;
  overflow-x: auto;
}
.msg.bot p { margin: .4em 0; }
.msg.bot table { border-collapse: collapse; margin: .5em 0; font-size: 14px; }
.msg.bot th, .msg.bot td { border-bottom: 1px solid var(--line); padding: 5px 10px; text-align: left; }
.msg.bot th { font-weight: 700; }
.msg.bot code { background: var(--bg); padding: 1px 4px; border-radius: 3px; font-size: 13px; }
.msg.bot pre { background: var(--bg); padding: 10px; border-radius: 6px; overflow-x: auto; }
.msg.bot h3, .msg.bot h4 { margin: .6em 0 .3em; }
.msg.error { color: var(--error); border-left-color: var(--error); }

.steps { font-size: 13px; color: var(--muted); margin: 0 0 6px; padding: 0; list-style: none; }
.steps li { margin: 2px 0; overflow-wrap: anywhere; }
.steps li::before { content: "\25B8  "; color: var(--gold); }
.steps li.fail::before { color: var(--error); }
.steps .args { opacity: .8; }
.thinking { color: var(--muted); font-size: 13px; }
.thinking::after { content: " ."; animation: dots 1.2s steps(3, end) infinite; }
@keyframes dots { 33% { content: " .."; } 66% { content: " ..."; } }

.ask { display: flex; gap: 8px; padding: 10px 0 4px; }
.ask textarea {
  flex: 1;
  resize: none;
  font: inherit;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  max-height: 160px;
}
.ask textarea:focus { outline: 2px solid var(--gold); outline-offset: -1px; }
.foot { font-size: 12px; color: var(--muted); margin: 2px 0 12px; }

@media (max-width: 560px) {
  .brand span { font-size: 14px; }
  #who-name { display: none; }
  .msg.user { max-width: 92%; }
}