:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e6e8ec;
  --muted: #9aa3b2;
  --accent: #f5a524;
  --ok: #3ccf91;
  --warn: #f5a524;
  --bad: #f2555a;
  --radius: 10px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

header.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 24px; padding: 12px 24px;
  background: rgba(23, 26, 33, 0.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
header.top nav { display: flex; gap: 20px; flex: 1; }
header.top nav a { color: var(--muted); font-size: 14px; }
header.top nav a:hover { color: var(--text); text-decoration: none; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; letter-spacing: 0.5px; color: var(--text); }
.brand:hover { text-decoration: none; }
.mark { width: 14px; height: 14px; border: 3px solid var(--accent); border-radius: 50%; position: relative; }
.mark::after { content: ""; position: absolute; inset: 1px; background: var(--accent); border-radius: 50%; }

main { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
section { padding: 48px 0 8px; }
h1 { font-size: clamp(34px, 6vw, 60px); line-height: 1.08; margin: 0 0 20px; letter-spacing: -0.02em; }
h2 { font-size: 26px; margin: 0 0 20px; letter-spacing: -0.01em; }
h3 { font-size: 18px; margin: 0 0 8px; }
.accent { color: var(--accent); }
.muted { color: var(--muted); }
.eyebrow { color: var(--accent); font-size: 13px; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; margin: 0 0 12px; }
.lead { font-size: 19px; color: var(--muted); max-width: 680px; margin: 0 0 28px; }
.hero { padding-top: 88px; }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
button, .button {
  display: inline-block; padding: 10px 18px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font: inherit; font-size: 14px; font-weight: 600; cursor: pointer;
}
.button:hover { text-decoration: none; border-color: var(--muted); }
.primary { background: var(--accent); border-color: var(--accent); color: #1a1100; }
.button.primary:hover { border-color: var(--accent); filter: brightness(1.08); }

.stats { list-style: none; display: flex; flex-wrap: wrap; gap: 12px 32px; padding: 0; margin: 40px 0 0; color: var(--muted); font-size: 14px; }
.stats strong { display: block; color: var(--text); font-size: 24px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.card p { margin: 0; }
.step { font: 600 13px ui-monospace, monospace; color: var(--accent); display: block; margin-bottom: 8px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.two-col p { margin-top: 0; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid currentColor; }
.badge.ok { color: var(--ok); } .badge.warn { color: var(--warn); } .badge.bad { color: var(--bad); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
td, th { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; }
tr:last-child td { border-bottom: 0; }

.flow {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; overflow-x: auto; margin: 0 0 20px; font: 13px/1.6 ui-monospace, monospace; color: var(--muted);
}
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.checks li { padding-left: 26px; position: relative; color: var(--muted); }
.checks li::before { content: "✓"; position: absolute; left: 0; color: var(--ok); font-weight: 700; }

.center { max-width: 520px; }
.stack { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
label { display: flex; flex-direction: column; gap: 4px; color: var(--muted); font-size: 13px; }
input, textarea { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px; font: inherit; }
textarea { resize: vertical; min-height: 72px; }
.notice { margin: 0; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel-2); font-size: 14px; }
.notice.ok { border-color: var(--ok); } .notice.bad { border-color: var(--bad); }
[hidden] { display: none !important; }

details { border-bottom: 1px solid var(--border); padding: 14px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 0; }

footer {
  max-width: 1080px; margin: 72px auto 0; padding: 24px; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; font-size: 13px;
}

@media (max-width: 760px) {
  header.top nav { display: none; }
  header.top { justify-content: space-between; }
  .two-col { grid-template-columns: 1fr; }
  main { padding: 0 16px; }
  .hero { padding-top: 56px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* multi-page additions */
header.top nav a[aria-current="page"] { color: var(--text); }
.page-head { padding-top: 72px; padding-bottom: 0; }
.page-head h1 { font-size: clamp(30px, 5vw, 46px); }
.page-head .lead { margin-bottom: 0; }
.card.link { display: block; color: var(--text); }
.card.link:hover { text-decoration: none; border-color: var(--accent); }
.row.next { margin-top: 28px; }

/* submission form */
.form-card { max-width: 640px; }
.form-card .stack { gap: 14px; margin-top: 0; }
.form-card .notice + .stack { margin-top: 16px; }
.hint { color: var(--muted); font-size: 12px; font-weight: 400; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
input[type="file"] { padding: 8px; }
input[type="file"]::file-selector-button { margin-right: 10px; padding: 6px 12px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font: inherit; font-size: 13px; cursor: pointer; }
.declaration { border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; margin: 0; display: grid; gap: 10px; }
.declaration legend { color: var(--muted); font-size: 12px; padding: 0 6px; }
label.check { flex-direction: row; align-items: flex-start; gap: 10px; color: var(--text); font-size: 14px; cursor: pointer; }
label.check input { margin-top: 3px; width: 16px; height: 16px; accent-color: var(--accent); flex: none; }
progress { width: 100%; height: 8px; accent-color: var(--accent); }
#progress-wrap { display: grid; gap: 4px; }
button:disabled { opacity: 0.6; cursor: progress; }