:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #5d6878;
  --border: #dde2e8;
  --accent: #0b6e4f;
  --accent-text: #ffffff;
  --user-bg: #0b6e4f;
  --user-text: #ffffff;
  --bot-bg: #ffffff;
  --danger: #b42318;
  --radius: 14px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161c;
    --surface: #1b2129;
    --text: #e7ebf0;
    --muted: #9aa5b4;
    --border: #2c343f;
    --accent: #3fb68b;
    --accent-text: #0d1a14;
    --user-bg: #2a7d5f;
    --user-text: #ffffff;
    --bot-bg: #1b2129;
    --danger: #f97066;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.shell {
  max-width: 760px;
  min-height: 100vh;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
  font-size: 14px;
}
h1 { font-size: 17px; margin: 0; }
.sub { margin: 0; color: var(--muted); font-size: 13px; }

.top-actions { display: flex; gap: 4px; }
.link-btn {
  background: none;
  border: 0;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  padding: 6px 8px;
  cursor: pointer;
  border-radius: 8px;
}
.link-btn:hover { color: var(--text); background: var(--surface); }

main { flex: 1; display: flex; flex-direction: column; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.login h2 { margin: 0 0 4px; font-size: 18px; }
.login p { margin: 0 0 14px; color: var(--muted); }
.login form { display: flex; gap: 8px; flex-wrap: wrap; }
.login input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
.msg { min-height: 1.5em; margin: 12px 0 0 !important; color: var(--danger) !important; }
.msg a { color: var(--accent); }

button.primary {
  padding: 12px 18px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button.primary:disabled { opacity: .55; cursor: default; }

.chat { flex: 1; display: flex; flex-direction: column; gap: 10px; }
.messages { flex: 1; display: flex; flex-direction: column; gap: 10px; }

.bubble {
  max-width: 92%;
  padding: 12px 14px;
  border-radius: var(--radius);
  overflow-wrap: anywhere;
}
.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: 0 0 8px; padding-left: 20px; }
.bubble a { color: var(--accent); }
.bubble.user {
  align-self: flex-end;
  background: var(--user-bg);
  color: var(--user-text);
  border-bottom-right-radius: 4px;
  white-space: pre-wrap;
}
.bubble.bot {
  align-self: flex-start;
  background: var(--bot-bg);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.bubble.error { border-color: var(--danger); color: var(--danger); }
.bubble.typing { color: var(--muted); font-style: italic; }

.sources {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}
.sources ul { margin: 4px 0 0; padding-left: 18px; }

.suggestions p { margin: 0 0 8px; color: var(--muted); font-size: 14px; }
.suggestions { display: flex; flex-wrap: wrap; gap: 8px; }
.suggestions p { flex-basis: 100%; }
.chip {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  text-align: left;
}
.chip:hover { border-color: var(--accent); }

.composer { display: flex; gap: 8px; align-items: flex-end; }
.composer textarea {
  flex: 1;
  min-width: 0;
  resize: vertical;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
}
.danilo {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.disclaimer { font-size: 12px; color: var(--muted); }
.disclaimer p { margin: 0 0 4px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

[hidden] { display: none !important; }