:root {
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --border: #d2d2d7;
  --green: #248a3d;
  --amber: #b25000;
  --radius: 18px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink); background: var(--bg); line-height: 1.5;
}
.nav { border-bottom: 1px solid #e8e8ed; }
.nav-inner {
  max-width: 980px; margin: 0 auto; padding: 14px 22px;
  display: flex; align-items: center; justify-content: space-between;
}
.wordmark { font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.nav-contact { color: var(--ink-2); text-decoration: none; font-size: 14px; }
.nav-contact:hover { color: var(--ink); }

.hero { max-width: 760px; margin: 0 auto; padding: 84px 22px 40px; text-align: center; }
.hero h1 { font-size: clamp(32px, 6vw, 52px); font-weight: 700; letter-spacing: -0.025em; line-height: 1.08; }
.lede { margin: 18px auto 40px; font-size: clamp(16px, 2.6vw, 19px); color: var(--ink-2); max-width: 560px; }

.dropzone {
  border: 2px dashed var(--border); border-radius: 24px; background: var(--bg-soft);
  padding: 48px 24px; cursor: pointer; transition: border-color .15s ease, background .15s ease;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: #f0f7ff; }
.dropzone:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.dz-icon { font-size: 26px; color: var(--accent); margin-bottom: 10px; }
.dz-title { font-size: 19px; font-weight: 600; }
.dz-sub { margin-top: 6px; color: var(--ink-2); font-size: 15px; }
.dz-link { color: var(--accent); text-decoration: underline; }
.dz-note { margin-top: 14px; font-size: 13px; color: var(--ink-2); }

main { max-width: 980px; margin: 0 auto; padding: 0 22px; }
.section { padding: 56px 0 8px; }
.section h2 { font-size: clamp(24px, 4vw, 32px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 22px; }
.cards3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--bg-soft); border-radius: var(--radius); padding: 26px 22px; }
.card h3 { font-size: 17px; margin: 12px 0 8px; }
.card p { color: var(--ink-2); font-size: 15px; }
.step {
  width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 600; font-size: 15px;
}
.fixlist { list-style: none; columns: 2; column-gap: 32px; }
.fixlist li { font-size: 15px; color: var(--ink); padding: 7px 0 7px 24px; position: relative; break-inside: avoid; }
.fixlist li::before { content: "\2713"; position: absolute; left: 0; color: var(--green); font-weight: 700; }
.fineprint { margin-top: 18px; color: var(--ink-2); font-size: 14px; max-width: 640px; }
.privacy p, .contact p { color: var(--ink-2); font-size: 16px; max-width: 640px; }
.contact a { color: var(--accent); text-decoration: none; }
.contact a:hover { text-decoration: underline; }
.footer { border-top: 1px solid #e8e8ed; margin-top: 72px; padding: 26px 22px; text-align: center; color: var(--ink-2); font-size: 13px; }

.results { padding: 24px 0 8px; }
.res-card { border: 1px solid var(--border); border-radius: 24px; padding: 30px 26px; }
.res-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; }
.res-head h2 { font-size: clamp(22px, 4vw, 28px); letter-spacing: -0.02em; }
.res-file { color: var(--ink-2); font-size: 14px; word-break: break-all; }
.stats { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 6px; }
.stat { background: var(--bg-soft); border-radius: 999px; padding: 7px 14px; font-size: 14px; color: var(--ink); }
.stat b { font-weight: 600; }
.issue-group { margin-top: 24px; }
.issue-group h3 { font-size: 16px; margin-bottom: 10px; }
.issue-group h3.fixed { color: var(--green); }
.issue-group h3.open { color: var(--amber); }
.issue { display: flex; gap: 10px; padding: 10px 0; border-top: 1px solid #eeeef2; font-size: 15px; }
.issue .n { color: var(--ink-2); min-width: 44px; font-variant-numeric: tabular-nums; }
.issue .rows { color: var(--ink-2); font-size: 13px; margin-top: 2px; }
.preview-wrap { margin-top: 26px; overflow-x: auto; border: 1px solid #eeeef2; border-radius: 14px; }
.preview-wrap table { border-collapse: collapse; font-size: 12.5px; white-space: nowrap; }
.preview-wrap th, .preview-wrap td { border-bottom: 1px solid #eeeef2; padding: 7px 12px; text-align: left; max-width: 240px; overflow: hidden; text-overflow: ellipsis; }
.preview-wrap th { background: var(--bg-soft); font-weight: 600; position: sticky; top: 0; }
.preview-note { color: var(--ink-2); font-size: 13px; margin-top: 8px; }
.res-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; align-items: center; }
.btn-primary {
  display: inline-block; background: var(--accent); color: #fff; border: none; border-radius: 999px;
  padding: 14px 28px; font-size: 16px; font-weight: 600; cursor: pointer; text-decoration: none;
  font-family: inherit;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: none; border: none; color: var(--accent); font-size: 15px; cursor: pointer; font-family: inherit; }
.btn-ghost:hover { text-decoration: underline; }
.res-error { color: var(--amber); font-size: 15px; margin-top: 14px; }
.spinner { display: inline-block; width: 18px; height: 18px; border: 2.5px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; vertical-align: -4px; margin-right: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 720px) {
  .cards3 { grid-template-columns: 1fr; }
  .fixlist { columns: 1; }
  .hero { padding-top: 56px; }
  .res-card { padding: 22px 18px; }
}