:root {
  --bg: #0e1117;
  --panel: #161b26;
  --panel2: #1d2433;
  --border: #2a3244;
  --text: #e6e9f0;
  --muted: #8b93a7;
  --accent: #4f8cff;
  --good: #34d399;
  --bad: #f87171;
  --gold: #fbbf24;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
}

a { color: var(--accent); text-decoration: none; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(14, 17, 23, .92);
  backdrop-filter: blur(4px);
  z-index: 5;
}
.brand { font-weight: 800; font-size: 20px; letter-spacing: .5px; color: var(--text); }
.brand .logo { color: var(--accent); }
.topbar nav a { margin-left: 18px; color: var(--muted); font-size: 14px; }
.topbar nav a:hover { color: var(--text); }

main { max-width: 920px; margin: 0 auto; padding: 32px 20px 48px; }

.hero { text-align: center; padding: 24px 8px 12px; }
.hero h1 { font-size: 34px; line-height: 1.2; margin: 0 0 12px; }
.hero .sub { color: var(--muted); font-size: 17px; max-width: 760px; margin: 0 auto; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin: 24px 0;
}
.card.narrow { max-width: 640px; margin: 32px auto; }

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  background: var(--panel2);
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 14px;
}
.tab.active { color: #fff; background: var(--accent); border-color: var(--accent); }

label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 6px; }
input[type="text"], input[type="email"], select, textarea {
  width: 100%;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 15px;
  margin-bottom: 4px;
}
textarea { font-family: inherit; }
button[type="submit"], .copy-btn {
  margin-top: 16px;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 10px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
button[type="submit"]:hover, .copy-btn:hover { filter: brightness(1.1); }

.hint { color: var(--muted); font-size: 13px; margin-top: 8px; }
.error {
  background: rgba(248, 113, 113, .12);
  border: 1px solid var(--bad);
  color: var(--bad);
  border-radius: 10px;
  padding: 10px 14px;
  margin: 0 0 16px;
  font-size: 14px;
}

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.grid.small { grid-template-columns: repeat(3, 1fr); }
.checks { margin: 14px 0; }
.checks label { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 14px; }

.hidden { display: none; }

section h2 { margin: 8px 0 16px; font-size: 24px; }
section h3 { margin: 20px 0 8px; font-size: 17px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.mini {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.mini h3 { margin: 0 0 6px; font-size: 15px; }
.mini p { color: var(--muted); font-size: 13px; margin: 0; }

.pricing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.plan {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.plan.featured { border-color: var(--accent); }
.plan .price { font-size: 26px; font-weight: 800; margin: 8px 0; color: var(--gold); }
.plan p { color: var(--muted); font-size: 13px; margin: 4px 0; }

.score-big { font-size: 72px; font-weight: 900; color: var(--accent); line-height: 1; }
.score-big span { font-size: 24px; color: var(--muted); font-weight: 500; }
.meta-line { color: var(--muted); font-size: 14px; margin: 6px 0 16px; }

.fixes li { margin: 8px 0; }

table.sections { width: 100%; border-collapse: collapse; }
.sections td { padding: 6px 8px; }
.sections .label { width: 180px; font-size: 14px; }
.sections .bar { width: auto; }
.bar-fill { height: 12px; background: var(--accent); border-radius: 6px; min-width: 2px; }
.sections .pts { width: 70px; text-align: right; color: var(--muted); font-size: 13px; }

details.checks { border: 1px solid var(--border); border-radius: 10px; margin: 10px 0; padding: 8px 14px; }
details.checks summary { cursor: pointer; font-weight: 600; font-size: 14px; }
details.checks ul { list-style: none; padding: 0; margin: 8px 0 4px; }
details.checks li { display: flex; align-items: baseline; gap: 8px; padding: 5px 0; font-size: 14px; flex-wrap: wrap; }
details.checks li .detail { color: var(--muted); font-size: 13px; }
details.checks li .pts { margin-left: auto; color: var(--muted); font-size: 12px; }
.chip { font-weight: 800; }
li.ok .chip { color: var(--good); }
li.bad .chip { color: var(--bad); }
li.bad strong { color: var(--bad); }

.rewrite-block { margin: 18px 0; }
.rewrite-block h3 { display: flex; align-items: baseline; gap: 10px; }
.limit { color: var(--muted); font-size: 12px; font-weight: 400; }
.copy, pre.copy {
  background: var(--panel2);
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 15px;
  margin: 8px 0;
  white-space: pre-wrap;
  word-break: break-word;
}
pre.copy { font-family: inherit; line-height: 1.6; }
.note { background: rgba(79, 140, 255, .08); border: 1px solid rgba(79, 140, 255, .4); border-radius: 10px; padding: 10px 14px; font-size: 13px; margin: 10px 0; }
.copy-btn { margin-top: 0; padding: 7px 14px; font-size: 13px; }

.delta .delta-scores { display: flex; align-items: center; gap: 20px; margin: 16px 0; }
.delta .big { font-size: 56px; font-weight: 900; display: flex; flex-direction: column; line-height: 1; }
.delta .big span { font-size: 14px; color: var(--muted); font-weight: 500; }
.delta .before { color: var(--bad); }
.delta .after { color: var(--good); }
.delta .arrow { font-size: 34px; color: var(--muted); }
.delta .changes { color: var(--muted); font-size: 14px; }
.preview-rewrite .copy { background: rgba(52, 211, 153, .06); }

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 28px 20px 40px;
  border-top: 1px solid var(--border);
}

@media (max-width: 720px) {
  .cards, .pricing { grid-template-columns: 1fr 1fr; }
  .grid, .grid.small { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .score-big { font-size: 54px; }
}