:root {
  --paper: #EDEAE2;
  --paper-raised: #F6F4EE;
  --ink: #21251F;
  --ink-soft: #565B4F;
  --accent: #2E6E5E;
  --accent-soft: #DEEAE4;
  --line: #C7C0AF;
  --danger: #A3402F;
  --font-display: "Source Serif 4", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.5;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.masthead h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 2.1rem;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.lede {
  color: var(--ink-soft);
  margin: 0 0 28px;
  max-width: 60ch;
}

.panel {
  border-top: 1px solid var(--line);
  padding: 22px 0 26px;
}

.panel h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0 0 14px;
}

.row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: flex-start;
  margin-bottom: 10px;
}

.row.align-end { align-items: flex-end; }

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--ink-soft);
  flex: 1 1 220px;
}

.opt { font-weight: 400; color: var(--ink-soft); font-size: 0.8em; }

label.narrow { flex: 0 0 140px; }

input, textarea, select {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 9px 10px;
}

input:focus, textarea:focus, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

textarea { width: 100%; resize: vertical; font-family: var(--font-body); }

button {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 3px;
  padding: 9px 16px;
  cursor: pointer;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--accent);
  transition: background 120ms ease;
}

button.primary {
  background: var(--accent);
  color: var(--paper-raised);
}

button.primary:hover { background: #275c4e; }
button.ghost:hover { background: var(--accent-soft); }

button.danger {
  border-color: var(--danger);
  color: var(--danger);
  padding: 4px 10px;
  font-size: 0.8rem;
}
button.danger:hover { background: #f1ded9; }

.status {
  font-size: 0.85rem;
  color: var(--ink-soft);
  align-self: center;
}

.hint {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin: 10px 0 0;
}

.hint code {
  font-family: var(--font-mono);
  background: var(--paper-raised);
  padding: 1px 5px;
  border-radius: 2px;
}

.stat-strip {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.stat-strip .figure {
  font-family: var(--font-display);
  font-size: 1.6rem;
  display: block;
}

.ledger { display: flex; flex-direction: column; }

.ledger.compact .entry { padding: 8px 0; }

.model-add { margin-top: 6px; }

.provider-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 1px 6px;
  margin-left: 8px;
}

.entry {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  align-items: flex-start;
}

.entry:first-child { border-top: none; }

.entry .meta {
  flex: 0 0 130px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.entry .lang-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 2px;
  padding: 1px 6px;
  font-size: 0.75rem;
}

.entry .content {
  flex: 1;
  font-size: 0.92rem;
  white-space: pre-wrap;
}

.entry .content .topic {
  display: block;
  font-weight: 600;
  margin-bottom: 4px;
}

@media (max-width: 520px) {
  .entry { flex-direction: column; }
  .entry .meta { flex-direction: row; gap: 8px; flex: none; }
}