:root {
  --bg: #10120e;
  --ink: #f4f1e6;
  --muted: #b7b29f;
  --line: rgba(244, 241, 230, 0.12);
  --card: #1a1d14;
  --mark: #dff25a;
  --mark-ink: #17190d;
  --ok: #9be7a0;
  --bad: #ff8a62;
  --note: #f0c36a;
  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --sans: "Segoe UI", "Avenir Next", "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(900px 420px at 100% -10%, rgba(223, 242, 90, 0.09), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.45;
}
button, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -0.02em; }
h1 { margin: 0; font-size: clamp(2rem, 4.2vw, 2.9rem); line-height: 1.02; max-width: 18ch; }
h2 { margin: 0; font-size: 1.2rem; }
h3 { margin: 0; font-size: 1rem; }
p { margin: 0; }

.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: var(--mark);
  color: var(--mark-ink);
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 2;
}
.skip:focus { top: 12px; }

.top, .wrap, .foot { width: min(1120px, calc(100% - 32px)); margin-inline: auto; }
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 0 4px;
}
.brand { display: flex; gap: 12px; align-items: center; }
.mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--mark);
  color: var(--mark-ink);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.25rem;
}
.name { font-family: var(--serif); font-size: 1.15rem; }
.sub, .local, .hint, .card-head p, .foot, .placeholder { color: var(--muted); }
.sub, .local { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.02em; }
.wrap { padding-bottom: 48px; }

.hero { padding: 8px 0 8px; }
.lede { margin-top: 8px; max-width: 62ch; color: var(--muted); font-size: 1.02rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 10px; }

.principles, .work { display: grid; gap: 12px; }
.principles { grid-template-columns: 1fr 1fr; }
.principles article, .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.principles article { padding: 12px 12px 13px; }
.principles h2 { font-size: 1.02rem; margin-top: 4px; }
.principles p:last-child { margin-top: 4px; color: var(--muted); font-size: 0.88rem; }
.n { font-family: var(--mono); color: var(--mark); font-size: 0.75rem; letter-spacing: 0.08em; }

.samples {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 12px 0 10px;
}
.samples-label { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); margin-right: 4px; }

button, .choice {
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  padding: 8px 12px;
  min-height: 40px;
}
button.primary, button.primary:hover {
  background: var(--mark);
  color: var(--mark-ink);
  border-color: var(--mark);
  font-weight: 650;
}
button.ghost { color: var(--muted); }
button:hover { border-color: rgba(244, 241, 230, 0.35); }
:focus-visible { outline: 2px solid var(--mark); outline-offset: 2px; }

.work { margin-bottom: 12px; }
.card { padding: 16px; }
.card-head, .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.card-head { margin-bottom: 10px; align-items: baseline; }
.card-head p { font-size: 0.9rem; }
.row { margin: 14px 0 8px; }
.row.tight { margin: 0; flex-wrap: wrap; justify-content: flex-end; }
.row.tight button { min-height: 36px; }

textarea {
  width: 100%;
  min-height: 88px;
  resize: vertical;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0c0e0a;
  padding: 12px;
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.45;
}
textarea::placeholder { color: #6f6c60; }

.stack { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; min-height: 48px; }
.placeholder { font-size: 0.92rem; }
.questions { margin: 0; padding-left: 1.1rem; }
.questions li { margin: 4px 0; }

.brief {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  background: #0c0e0a;
  border-radius: 12px;
  border: 1px solid var(--line);
  padding: 12px;
  min-height: 88px;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--ink);
}

.score { font-family: var(--mono); font-variant-numeric: tabular-nums; }
#score-num { font-family: var(--serif); font-size: 1.8rem; line-height: 1; color: var(--ink); }
.score[data-state="ok"] #score-num { color: var(--ok); }
.score[data-state="bad"] #score-num { color: var(--bad); }

.finding {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 10px;
  align-items: start;
  padding: 8px 12px;
  border-radius: 12px;
  background: #12140e;
  border: 1px solid var(--line);
}
.finding.warn { border-color: rgba(255, 138, 98, 0.5); }
.finding.note { border-color: rgba(240, 195, 106, 0.4); }
.finding p { font-size: 0.92rem; }
.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding-top: 3px;
}
.finding.warn .tag { color: var(--bad); }
.finding.note .tag { color: var(--note); }

.plan, .drill { margin-top: 12px; }
.verdict { margin-top: 10px; font-size: 0.95rem; }
.verdict[data-state="ok"] { color: var(--ok); }
.verdict[data-state="bad"] { color: var(--bad); }
.verdict[data-state="empty"] { color: var(--muted); }

.drill fieldset {
  margin: 0 0 14px;
  padding: 12px 0 4px;
  border: 0;
  border-top: 1px solid var(--line);
}
.drill legend { padding: 10px 0; font-family: var(--serif); font-size: 1.05rem; }
.choice {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  border-radius: 12px;
  padding: 10px 12px;
  margin: 6px 0;
  min-height: 44px;
}
.choice:has(input:checked) {
  border-color: rgba(223, 242, 90, 0.7);
  background: rgba(223, 242, 90, 0.08);
}
fieldset[data-state="ok"] .choice:has(input:checked) { border-color: var(--ok); }
fieldset[data-state="bad"] .choice:has(input:checked) { border-color: var(--bad); }
.choice input { margin-top: 4px; accent-color: var(--mark); }
.why { margin: 6px 0 0; color: var(--muted); font-size: 0.92rem; }

.foot { padding: 8px 0 36px; font-size: 0.85rem; }
.foot a { color: var(--ink); }
.path { font-family: var(--mono); font-size: 0.78rem; }

@media (min-width: 900px) {
  .principles { grid-template-columns: repeat(4, 1fr); }
  .work { grid-template-columns: 1fr 1fr; align-items: start; }
  textarea { font-size: 13.5px; }
}
@media (min-width: 1200px) {
  .principles p:last-child { white-space: nowrap; }
}

#diff { min-height: 76px; }

@media (max-width: 720px) {
  .top, .wrap, .foot { width: min(1120px, calc(100% - 24px)); }
  h1 { max-width: none; }
  .sub { display: none; }
  .card-head { flex-wrap: wrap; }
  .finding { grid-template-columns: 1fr; gap: 4px; }
  .top { align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}