:root {
  --ink: #0a0a0a;
  --paper: #ffffff;
  --mute: #6b6b6b;
  --line: #d4d4d4;
  --wash: #f4f4f2;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
}
* { box-sizing: border-box; }
body { margin: 0; }
button, textarea, input { font: inherit; color: inherit; }

.shell { max-width: 980px; margin: 0 auto; padding: 0 20px 80px; }
.top { display: flex; justify-content: space-between; align-items: center; padding: 22px 0 14px; border-bottom: 4px solid var(--ink); }
.brand { font-weight: 900; letter-spacing: -0.02em; font-size: 22px; text-transform: uppercase; }
.brand small { display: block; font-size: 11px; font-weight: 700; letter-spacing: .3em; color: var(--mute); }
.nav { display: flex; gap: 6px; align-items: center; }
.nav button { background: none; border: 0; padding: 8px 12px; font-weight: 600; cursor: pointer; border-bottom: 3px solid transparent; }
.nav button.on { border-color: var(--ink); }
.who { color: var(--mute); font-size: 14px; margin-left: 10px; }

h1 { font-size: 40px; letter-spacing: -0.03em; margin: 30px 0 6px; font-weight: 900; text-transform: uppercase; }
h2 { font-size: 13px; letter-spacing: .28em; text-transform: uppercase; margin: 32px 0 12px; font-weight: 700; }
p.lead { color: var(--mute); margin: 0 0 22px; }

.btn { background: var(--ink); color: var(--paper); border: 2px solid var(--ink); padding: 11px 20px; font-weight: 700; cursor: pointer; border-radius: 4px; }
.btn.ghost { background: var(--paper); color: var(--ink); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.card { border: 2px solid var(--ink); border-radius: 6px; padding: 20px; margin-bottom: 16px; }
.card.soft { border-color: var(--line); background: var(--wash); }
.card h3 { margin: 0 0 4px; font-size: 22px; letter-spacing: -0.01em; }
.tag { display: inline-block; border: 2px solid var(--ink); border-radius: 999px; padding: 2px 11px; font-size: 12px; font-weight: 700; margin: 0 6px 6px 0; }
.tag.fill { background: var(--ink); color: var(--paper); }

.chat { background: var(--wash); border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.bubble { background: var(--paper); border: 1px solid var(--line); border-radius: 4px 14px 14px 14px; padding: 14px 16px; white-space: pre-wrap; line-height: 1.5; max-width: 760px; }
.bubble .from { font-size: 11px; letter-spacing: .22em; font-weight: 700; text-transform: uppercase; color: var(--mute); display: block; margin-bottom: 6px; }
.compose textarea { width: 100%; min-height: 200px; border: 2px solid var(--ink); border-radius: 6px; padding: 14px; resize: vertical; line-height: 1.5; background: var(--paper); }
.compose .meta { color: var(--mute); font-size: 13px; }

.score { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.big { font-size: 76px; font-weight: 900; letter-spacing: -0.04em; line-height: 1; }
.verdict { font-size: 13px; letter-spacing: .25em; font-weight: 800; text-transform: uppercase; padding: 6px 12px; border: 2px solid var(--ink); }
.verdict.pass { background: var(--ink); color: var(--paper); }

.bars .bar { display: grid; grid-template-columns: 150px 1fr 40px; gap: 12px; align-items: center; margin: 9px 0; font-size: 14px; }
.bars .track { height: 12px; background: var(--wash); border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.bars .fill { height: 100%; background: var(--ink); }
.bars .name { text-transform: capitalize; font-weight: 600; }

.err { border-left: 5px solid var(--ink); padding: 8px 14px; margin: 10px 0; background: var(--wash); }
.err .q { font-style: italic; color: var(--mute); }
.err .fix { font-weight: 600; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.two pre { margin: 0; white-space: pre-wrap; font: inherit; line-height: 1.5; }
.notice { border: 2px solid var(--ink); padding: 12px 14px; margin: 14px 0; font-weight: 600; }
.notice.bad { background: var(--ink); color: var(--paper); }

table.grid { width: 100%; border-collapse: collapse; font-size: 14px; }
table.grid th { text-align: left; font-size: 12px; letter-spacing: .2em; text-transform: uppercase; border-bottom: 2px solid var(--ink); padding: 8px 6px; }
table.grid td { border-bottom: 1px solid var(--line); padding: 9px 6px; vertical-align: top; }

.login { max-width: 420px; margin: 90px auto 0; }
.login input { width: 100%; padding: 13px; border: 2px solid var(--ink); border-radius: 4px; margin: 14px 0; font-size: 17px; }

@media (max-width: 720px) {
  .two { grid-template-columns: 1fr; }
  .bars .bar { grid-template-columns: 110px 1fr 36px; }
  h1 { font-size: 30px; }
  .top { flex-direction: column; align-items: flex-start; gap: 10px; }
}