:root {
  color-scheme: light dark;
  --bg: #f4f4f5;
  --card: #ffffff;
  --text: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --accent: #6d28d9;
  --good: #15803d;
  --warn: #b45309;
  --bad: #b91c1c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #18181b;
    --card: #27272a;
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --border: #3f3f46;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden {
  display: none !important;
}
.center {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
}
.muted {
  color: var(--muted);
}
.error {
  color: var(--bad);
}
.spacer {
  flex: 1;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  margin: 0.75rem;
}

#login-form {
  width: min(420px, 90vw);
}
#login-form label {
  display: block;
  margin: 0.6rem 0;
}

input,
button,
select {
  font: inherit;
  padding: 0.45rem 0.7rem;
  border-radius: 7px;
  border: 1px solid var(--border);
}

input {
  width: 100%;
  background: var(--card);
  color: var(--text);
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

button.secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

header {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.6rem 0.75rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

header button {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

#toolbar {
  display: flex;
  gap: 0.5rem;
  padding: 0.6rem 0.75rem 0;
  flex-wrap: wrap;
  align-items: center;
}
#toolbar input {
  width: 220px;
}

main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  align-items: start;
}

#messages {
  max-height: 55vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}
.msg {
  padding: 0.5rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  white-space: pre-wrap;
}
.msg.user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  max-width: 85%;
}
.msg.bot {
  align-self: flex-start;
  max-width: 95%;
}
.msg.progress {
  border-style: dashed;
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.55;
  }
}
#toolbar select {
  max-width: 320px;
}
#chat-form {
  display: flex;
  gap: 0.5rem;
}

.score {
  font-size: 2rem;
  font-weight: 700;
}
.score.good {
  color: var(--good);
}
.score.warn {
  color: var(--warn);
}
.score.bad {
  color: var(--bad);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th,
td {
  text-align: left;
  padding: 0.35rem;
  border-bottom: 1px solid var(--border);
}
.sev-error {
  color: var(--bad);
  font-weight: 700;
}
.sev-warning {
  color: var(--warn);
}
.sev-info {
  color: var(--muted);
}

.fix {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem;
  margin: 0.5rem 0;
}
.fix .diff {
  font-family: monospace;
  font-size: 0.85rem;
}
.fix .old {
  color: var(--bad);
  text-decoration: line-through;
}
.fix .new {
  color: var(--good);
}
button.linklike {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  padding: 0.15rem 0;
  text-align: left;
  white-space: normal;
}
footer.card {
  font-size: 0.9rem;
}

@media print {
  header,
  #toolbar,
  #ai-banner,
  #chat-panel,
  #list-panel,
  footer.card,
  button {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  main {
    display: block;
  }
  #report-panel {
    display: block !important;
    border: none;
    margin: 0;
  }
  .card {
    border: none;
    margin: 0;
  }
  .fix {
    break-inside: avoid;
  }
}