:root {
  --background: #f8fafc;
  --surface: #ffffff;
  --surface-subtle: #f1f5f9;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #1e293b;
  --muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;
  --success: #15803d;
  --success-soft: #f0fdf4;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --radius: 6px;
  --shadow: 0 1px 3px rgb(15 23 42 / 8%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { color-scheme: light; }
body { margin: 0; background: var(--background); color: var(--text); font-size: 15px; line-height: 1.55; }
button, input, select { font: inherit; }
button, select, input[type="checkbox"], .drop { cursor: pointer; }

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.header-inner, main, footer { width: min(100% - 64px, 1080px); margin-inline: auto; }
.header-inner { min-height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { color: var(--text); font-size: 18px; font-weight: 700; text-decoration: none; letter-spacing: -.02em; }
.local-pill { margin: 0; padding: 4px 10px; border: 1px solid #bbf7d0; border-radius: 999px; background: var(--success-soft); color: var(--success); font-size: 12px; font-weight: 600; }

main { padding-block: 32px 48px; }
.hero { margin-bottom: 24px; }
.eyebrow { margin: 0 0 4px; color: var(--primary); font-size: 12px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.hero h1 { margin: 0; font-size: clamp(2rem, 5vw, 3rem); line-height: 1.1; letter-spacing: -.035em; }
.hero > p:last-child { max-width: 680px; margin: 12px 0 0; color: var(--muted); }

.tools { display: flex; gap: 4px; margin-bottom: 16px; padding: 4px; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-subtle); }
.tools button { min-height: 40px; padding: 8px 14px; border: 1px solid transparent; border-radius: 4px; background: transparent; color: var(--muted); font-size: 14px; font-weight: 600; white-space: nowrap; }
.tools button:hover { color: var(--text); }
.tools button.active { border-color: var(--border); background: var(--surface); color: var(--primary); box-shadow: var(--shadow); }

.panel, .result { display: none; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.panel.active { display: block; }
.panel-head { display: flex; align-items: start; justify-content: space-between; gap: 24px; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.panel-head div { display: flex; align-items: center; gap: 10px; }
.panel-head span { color: var(--muted); font: 600 12px ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.panel h2, .result h2 { margin: 0; font-size: 18px; line-height: 1.35; }
.panel-head p { max-width: 430px; margin: 1px 0 0; color: var(--muted); font-size: 13px; }

form { display: grid; gap: 20px; padding: 24px; }
fieldset { min-width: 0; margin: 0; padding: 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
legend { padding: 0 6px; color: var(--text); font-size: 14px; font-weight: 650; }
.grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.two-col fieldset { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 12px; background: var(--surface-subtle); }
.or { padding-bottom: 11px; color: var(--muted); font-size: 12px; }
label { display: grid; gap: 6px; color: var(--text); font-size: 13px; font-weight: 600; }
label small { color: var(--muted); font-weight: 400; }
input, select { width: 100%; min-height: 40px; padding: 8px 10px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface); color: var(--text); }
input::placeholder { color: #94a3b8; }
.checks { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 16px; }
.checks label { display: flex; align-items: center; min-height: 32px; }
.checks input { width: 18px; min-height: 18px; margin: 0; accent-color: var(--primary); }

.primary { justify-self: start; min-height: 44px; padding: 10px 16px; border: 1px solid var(--primary); border-radius: var(--radius); background: var(--primary); color: white; font-size: 14px; font-weight: 600; }
.primary:hover { border-color: var(--primary-hover); background: var(--primary-hover); }
.primary span { margin-left: 8px; }

.drop { min-height: 140px; padding: 28px; place-items: center; border: 2px dashed var(--border-strong); border-radius: var(--radius); background: var(--surface-subtle); text-align: center; transition: background-color 150ms, border-color 150ms; }
.drop:hover, .drop.drag { border-color: var(--primary); background: var(--primary-soft); }
.drop input { position: absolute; width: 1px; min-height: 1px; opacity: 0; }
.drop strong { font-size: 15px; }
.drop span { color: var(--muted); font-size: 13px; font-weight: 400; }

.result { display: block; margin-top: 20px; padding: 20px 24px; overflow: auto; scroll-margin-top: 76px; }
.result.hidden { display: none; }
.result.error { border-color: #fecaca; background: var(--danger-soft); color: var(--danger); }
.result-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.download-links { display: flex; flex-wrap: wrap; gap: 8px; }
.download-links button { min-height: 40px; padding: 8px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface); color: var(--primary); font-size: 13px; font-weight: 600; }
.download-links button:hover { border-color: var(--primary); background: var(--primary-soft); }
table { width: 100%; margin-top: 16px; border-collapse: collapse; font-size: 13px; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; white-space: nowrap; }
th { background: var(--surface-subtle); color: var(--muted); font-weight: 600; }
td.sequence { max-width: 330px; overflow: hidden; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; text-overflow: ellipsis; }
.logo-wrap { margin-top: 16px; overflow-x: auto; }
.logo-wrap svg { display: block; min-width: 700px; background: white; }

footer { display: flex; justify-content: space-between; gap: 24px; padding-block: 24px 40px; border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; }
footer span { color: var(--text); font-weight: 700; }
footer p { margin: 0; }

:focus-visible { outline: 3px solid rgb(37 99 235 / 35%); outline-offset: 2px; }

@media (max-width: 800px) {
  .header-inner, main, footer { width: min(100% - 32px, 1080px); }
  .grid { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  main { padding-top: 24px; }
  .panel-head, .result-head { display: block; }
  .panel-head p { margin-top: 6px; }
  form { padding: 20px 16px; }
  .two-col fieldset { grid-template-columns: 1fr; }
  .or { padding: 0; text-align: center; }
  .download-links { margin-top: 16px; }
}

@media (max-width: 480px) {
  .grid { grid-template-columns: 1fr; }
  .local-pill { max-width: 150px; text-align: center; }
  .primary { width: 100%; }
  footer { display: block; }
  footer p { margin-top: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}