:root {
  color-scheme: dark;
  --bg: #111312;
  --surface: #181d1b;
  --surface-2: #202723;
  --line: #33413a;
  --text: #f2f5f0;
  --muted: #aab5ad;
  --green: #75d19f;
  --gold: #e2bd6d;
  --rose: #e18a8f;
  --blue: #90b9ee;
  --shadow: rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

.layout {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

h1, h2, p { margin: 0; }
h1 { font-size: 34px; line-height: 1.1; font-weight: 720; }
h2 { font-size: 16px; line-height: 1.25; font-weight: 680; }
.muted { color: var(--muted); margin-top: 7px; line-height: 1.45; }

.session-pill {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 10px;
  color: var(--gold);
  font-size: 13px;
  white-space: nowrap;
}

.auth-panel,
.workspace,
.results {
  margin-top: 20px;
}

.auth-panel {
  min-height: 108px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 14px 36px var(--shadow);
}

.message {
  min-height: 20px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.message.error { color: var(--rose); }
.message.warn { color: var(--gold); }

.button-row,
.form-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

button,
.button-link {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 12px;
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

button.primary {
  border-color: transparent;
  background: var(--green);
  color: #0d2117;
  font-weight: 700;
}

button:hover,
.button-link:hover { filter: brightness(1.08); }
button:disabled { opacity: 0.55; cursor: default; filter: none; }

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 18px;
}

.question-form,
.status-panel,
.final-answer,
.tab-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.question-form {
  padding: 18px;
}

label {
  display: block;
  margin-bottom: 10px;
  font-weight: 680;
}

textarea {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px;
  background: #0d100f;
  color: var(--text);
  font: inherit;
  line-height: 1.5;
}

.form-actions { margin-top: 12px; }

.status-panel {
  padding: 18px;
}

.steps {
  margin: 14px 0 0;
  padding-left: 22px;
  color: var(--muted);
  line-height: 1.8;
}

.steps li.active { color: var(--green); }
.steps li.done { color: var(--blue); }

.models {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.models span,
.rank-card {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 9px;
  color: var(--muted);
  font-size: 12px;
}

.models span.disabled {
  opacity: 0.48;
  text-decoration: line-through;
}

.model-note {
  font-size: 12px;
}

.result-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 12px;
}

.final-answer {
  padding: 20px;
  white-space: pre-wrap;
  line-height: 1.58;
}

.rank-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.rank-card strong {
  display: block;
  color: var(--text);
  font-size: 14px;
  margin-bottom: 4px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-top: 18px;
  flex-wrap: wrap;
}

.tab.active {
  background: var(--gold);
  color: #211805;
  border-color: transparent;
  font-weight: 700;
}

.tab-panel {
  margin-top: 10px;
  padding: 16px;
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.answer-item {
  border-left: 3px solid var(--blue);
  padding-left: 12px;
}

.answer-item.error { border-left-color: var(--rose); }

.answer-item h3 {
  margin: 0 0 8px;
  font-size: 14px;
}

.answer-item pre,
.raw pre {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  line-height: 1.5;
  color: var(--muted);
  font: 13px ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

@media (max-width: 820px) {
  .layout { width: min(100% - 24px, 1180px); padding-top: 22px; }
  .topbar,
  .auth-panel,
  .result-head { display: block; }
  .session-pill,
  .button-row { margin-top: 14px; }
  .workspace,
  .rank-strip,
  .answer-grid { grid-template-columns: 1fr; }
  h1 { font-size: 28px; }
}