:root {
  --bg: #fafaf9;
  --fg: #1c1917;
  --muted: #78716c;
  --line: #e7e5e4;
  --user: #1c1917;
  --user-fg: #fafaf9;
  --bot: #ffffff;
  --accent: #2563eb;
  --error: #b91c1c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111110;
    --fg: #e7e5e4;
    --muted: #a8a29e;
    --line: #292524;
    --user: #e7e5e4;
    --user-fg: #111110;
    --bot: #1c1b1a;
    --accent: #60a5fa;
    --error: #f87171;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }
body { height: 100dvh; }

body {
  display: flex;
  flex-direction: column;
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

h1 { flex: 1; min-width: 0; margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }

select, textarea, button { font: inherit; color: inherit; }

select {
  max-width: 50%;
  padding: 6px 8px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
}

button {
  padding: 8px 14px;
  border: 0;
  border-radius: 6px;
  background: var(--user);
  color: var(--user-fg);
  cursor: pointer;
}
button.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); padding: 6px 10px; }
button:hover { opacity: 0.85; }

main {
  flex: 1;
  overflow-y: auto;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.empty { margin: auto; color: var(--muted); }

.msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 12px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.msg.user { align-self: flex-end; background: var(--user); color: var(--user-fg); border-bottom-right-radius: 4px; }
.msg.assistant { align-self: flex-start; background: var(--bot); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.error { align-self: center; color: var(--error); font-size: 13px; }
.msg.pending .content:empty::after { content: "…"; color: var(--muted); }

.msg details { margin-bottom: 6px; color: var(--muted); font-size: 13px; }
.msg summary { cursor: pointer; user-select: none; }
.msg details .thinking { margin-top: 4px; padding-left: 10px; border-left: 2px solid var(--line); }

.msg .meta { margin-top: 6px; color: var(--muted); font-size: 12px; }

form {
  display: flex;
  gap: 8px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--line);
}

textarea {
  flex: 1;
  resize: none;
  max-height: 200px;
  padding: 9px 12px;
  background: var(--bot);
  border: 1px solid var(--line);
  border-radius: 8px;
  outline: none;
}
textarea:focus { border-color: var(--accent); }

/* ---- Decision mode (models like clef) ---------------------------------- */
[hidden] { display: none !important; }
.decision-mode .chat-only { display: none; }
body.decision-mode { max-width: 1200px; }

input { font: inherit; color: inherit; }
.muted { color: var(--muted); }

/* Fills the space between header and bottom; only the inner panes scroll. */
#decision {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
  border-top: 0;
}

.d-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.d-inputs, .d-results {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
}
.d-results { border-top: 1px solid var(--line); }

/* Wide screens: inputs | results side by side, each scrolling on its own. */
@media (min-width: 900px) {
  .d-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); overflow: hidden; }
  .d-inputs, .d-results { min-height: 0; overflow-y: auto; }
  .d-results { border-top: 0; border-left: 1px solid var(--line); }
}

.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field > span { font-weight: 600; font-size: 13px; }
.field small { font-weight: 400; color: var(--muted); }
.field small::before { content: "· "; }

#decision input:not([type="file"]),
#decision select,
#decision textarea {
  width: 100%;
  min-width: 0;
  max-width: none;
  max-height: none;
  flex: none;
  padding: 7px 10px;
  background: var(--bot);
  border: 1px solid var(--line);
  border-radius: 6px;
  outline: none;
}
#decision textarea { resize: vertical; field-sizing: content; min-height: 4.2em; max-height: 40vh; }
#decision input:focus, #decision select:focus, #decision textarea:focus { border-color: var(--accent); }
#decision input:invalid:not(:placeholder-shown) { border-color: var(--error); }
#images { max-width: 100%; font-size: 13px; color: var(--muted); }

#questions { display: flex; flex-direction: column; gap: 10px; }
.question {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.question .row { display: flex; gap: 6px; align-items: stretch; }
#decision .question .q-name { flex: 1 1 auto; width: auto; font-weight: 600; }
#decision .question .q-type { flex: 0 0 auto; width: auto; }
.question .q-remove { flex: 0 0 auto; padding: 0 10px; }
#decision .question .q-criteria { font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }
#add-question { align-self: flex-start; }

/* Bottom bar, mirrors the chat composer. */
#decision .actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--line);
}
#decide { min-width: 96px; }
#decide-status { font-size: 13px; font-variant-numeric: tabular-nums; }

#answers { display: flex; flex-direction: column; gap: 10px; }
#answers .empty { margin: 24px auto; }
#answers .error { margin: 0; color: var(--error); font-size: 13px; overflow-wrap: anywhere; }
.answer {
  padding: 10px 14px;
  background: var(--bot);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.answer .head { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; }
.answer .name { overflow-wrap: anywhere; }
.answer .verdict { font-weight: 600; color: var(--accent); white-space: nowrap; }
.answer .instr { font-size: 13px; margin: 2px 0 8px; }
.answer .meta, #answers > .meta { margin-top: 6px; color: var(--muted); font-size: 12px; }

.bars { display: flex; flex-direction: column; gap: 4px; }
.bar { display: grid; grid-template-columns: minmax(64px, 35%) 1fr 48px; align-items: center; gap: 8px; font-size: 13px; }
.bar .label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar .track { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; }
.bar .fill { display: block; height: 100%; background: var(--muted); }
.bar.win .fill { background: var(--accent); }
.bar.win .label { font-weight: 600; }
.bar .pct { text-align: right; font-variant-numeric: tabular-nums; color: var(--muted); }

@media (max-width: 520px) {
  header select { max-width: 60%; }
}