:root {
  --bg: #0d1117;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #2f81f7;
  --good: #3fb950;
  --warn: #d29922;
  --bad: #f85149;
  --card: #161b22;
  --border: #30363d;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
  line-height: 1.55;
  font-size: 16px;
  padding: 32px 16px;
  max-width: 720px;
  margin: 0 auto;
}

header { text-align: center; margin-bottom: 32px; }
header h1 { font-size: 36px; letter-spacing: -0.02em; }
.tagline { color: var(--muted); margin-top: 6px; font-size: 18px; }

main > section { margin-bottom: 36px; }

textarea {
  width: 100%;
  min-height: 200px;
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 14px;
  resize: vertical;
}
textarea:focus { outline: 2px solid var(--accent); border-color: transparent; }

.controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
}

button {
  background: var(--accent);
  color: white;
  border: 0;
  padding: 10px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.1); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.quota { color: var(--muted); font-size: 13px; }

#results {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
}

.score-card {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 16px;
}
.score-num {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--accent);
}
.score-label { font-size: 24px; color: var(--muted); }

.metrics { display: flex; gap: 18px; margin-bottom: 24px; color: var(--muted); font-size: 13px; }

#results h2 { font-size: 14px; text-transform: uppercase; color: var(--muted); margin: 20px 0 8px; letter-spacing: 0.04em; }

.finding-list { list-style: none; }
.finding-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.finding-list li:last-child { border-bottom: 0; }
.finding-list .name { color: var(--bad); font-weight: 600; }
.finding-list.good .name { color: var(--good); }
.finding-list .fix { color: var(--muted); font-size: 14px; margin-top: 4px; }

.rewrite {
  background: #010409;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--fg);
}

.lock-tag {
  display: inline-block;
  font-size: 11px;
  background: var(--warn);
  color: #000;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  text-transform: uppercase;
}

.share-row { margin-top: 18px; display: flex; gap: 8px; align-items: center; }
.share-row input { flex: 1; background: var(--card); color: var(--fg); border: 1px solid var(--border); padding: 8px 10px; border-radius: 4px; font-family: ui-monospace, monospace; font-size: 13px; }

.upgrade-card {
  background: linear-gradient(135deg, rgba(47,129,247,0.08), rgba(47,129,247,0.02));
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 24px;
}
.upgrade-card ul { margin: 12px 0 18px 20px; }
.upgrade-card li { margin: 6px 0; }
.upgrade-card .alt-pay { color: var(--muted); font-size: 13px; margin-top: 12px; }
.upgrade-card code { font-family: ui-monospace, monospace; background: var(--card); padding: 2px 6px; border-radius: 4px; }

#why p { margin: 8px 0; color: var(--muted); }

#faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  margin: 8px 0;
}
#faq summary { cursor: pointer; font-weight: 600; }
#faq details[open] summary { margin-bottom: 8px; }
#faq p { color: var(--muted); font-size: 14px; }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 36px;
}
footer a { color: var(--muted); }

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