:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --accent: #0f766e;
  --accent-hover: #0d9488;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --ok: #047857;
  --ok-bg: #ecfdf5;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}
a { color: var(--accent); }
.wrap { max-width: 720px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
header.hero { margin-bottom: 1rem; }
h1 {
  font-size: clamp(1.45rem, 4.5vw, 1.85rem);
  line-height: 1.25;
  margin: 0 0 .5rem;
  letter-spacing: -0.02em;
}
.subhead {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 1rem;
}
.trust {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem .75rem;
  margin: .75rem 0 0;
  padding: 0;
  list-style: none;
  font-size: .85rem;
  color: var(--muted);
}
.trust li::before {
  content: "•";
  margin-right: .4rem;
  color: var(--accent);
}
.trust li:first-child::before { content: none; margin: 0; }
.tool {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  margin: 0 0 1.75rem;
}
.dropzone {
  border: 2px dashed #cbd5e1;
  border-radius: 10px;
  padding: 1.5rem 1rem;
  text-align: center;
  background: #fafbfc;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: #f0fdfa;
}
.dropzone p { margin: .35rem 0; color: var(--muted); font-size: .95rem; }
.dropzone .hint { font-size: .8rem; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  border: none;
  border-radius: 8px;
  padding: .65rem 1.1rem;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: .55; cursor: not-allowed; }
.btn-ghost {
  background: transparent;
  color: var(--muted);
  font-weight: 500;
  font-size: .9rem;
  padding: .4rem .2rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.status {
  margin-top: .85rem;
  font-size: .9rem;
  min-height: 1.25rem;
}
.status.busy { color: var(--muted); }
.status.ok { color: var(--ok); background: var(--ok-bg); padding: .6rem .75rem; border-radius: 8px; }
.status.err { color: var(--danger); background: var(--danger-bg); padding: .6rem .75rem; border-radius: 8px; }
.result {
  display: none;
  margin-top: .9rem;
  padding-top: .9rem;
  border-top: 1px solid var(--border);
}
.result.show { display: block; }
.result .actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem 1rem; }
.meta { font-size: .85rem; color: var(--muted); margin: 0 0 .75rem; }
section { margin: 1.75rem 0; }
h2 {
  font-size: 1.15rem;
  margin: 0 0 .65rem;
  letter-spacing: -0.01em;
}
section p, section li { color: #374151; font-size: .95rem; }
ol.steps { padding-left: 1.2rem; margin: .5rem 0 0; }
ol.steps li { margin: .35rem 0; }
.two-col {
  display: grid;
  gap: .75rem;
}
@media (min-width: 560px) {
  .two-col { grid-template-columns: 1fr 1fr; }
}
.card-note {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .85rem 1rem;
}
.card-note h3 { margin: 0 0 .4rem; font-size: .95rem; }
.card-note ul { margin: 0; padding-left: 1.1rem; }
.card-note li { margin: .25rem 0; font-size: .9rem; }
details.faq {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .7rem .9rem;
  margin: .5rem 0;
}
details.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: .95rem;
}
details.faq p { margin: .55rem 0 0; font-size: .9rem; }
footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: .8rem;
  color: var(--muted);
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

.unlock-badge {
  margin: 0 0 .75rem;
  padding: .55rem .75rem;
  border-radius: 8px;
  background: var(--ok-bg);
  color: var(--ok);
  font-size: .9rem;
  font-weight: 600;
}