:root {
  --ink: #16171a;
  --grey: #5f6166;
  --muted: #8a8c91;
  --copper: #b88151;
  --copper-dk: #9a6a3f;
  --char: #3a3b40;
  --rule: #e4dcd2;
  --field: #faf7f3;
  --tan: #c9b49c;
  --bg: #ffffff;
  --danger: #b3261e;
  --brand-grad: linear-gradient(90deg, var(--copper), var(--char));
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 96px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.55;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* Header + gradient progress (the one brand moment) */
.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(6px);
  padding-top: env(safe-area-inset-top, 0px);
}
.top-inner {
  max-width: 1080px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 24px 14px;
}
.brand img { display: block; height: 22px; width: auto; }
.top-title { margin: 0; font-size: 14px; font-weight: 600; color: var(--ink); }
.progress { height: 4px; background: var(--rule); }
.progress-fill {
  display: block; height: 100%; width: 0;
  background: var(--brand-grad);
  background-size: 100vw 100%;
  transition: width .45s cubic-bezier(.2,.7,.2,1);
}

/* Layout */
.layout {
  max-width: 1080px; margin: 0 auto;
  display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 56px;
  padding: 40px 24px 72px;
}
.rail { position: sticky; top: 104px; align-self: start; }
.rail ol { list-style: none; margin: 0; padding: 0; }
.rail li + li { margin-top: 2px; }
.rail button {
  width: 100%; display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; border: 0; border-radius: 6px; background: none;
  font: inherit; font-size: 14px; color: var(--grey); text-align: left; cursor: pointer;
}
.rail button:hover:not(:disabled) { background: var(--field); color: var(--ink); }
.rail button:disabled { cursor: default; opacity: .55; }
.rail .letter { width: 16px; font-weight: 700; color: var(--muted); }
.rail .label { flex: 1; }
.rail .count { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.rail [aria-current="step"] { background: var(--field); color: var(--ink); font-weight: 600; }
.rail [aria-current="step"] .letter, .rail .done .letter { color: var(--copper); }
.rail-note { margin: 20px 10px 0; font-size: 12.5px; color: var(--muted); line-height: 1.45; }

main { max-width: 680px; outline: none; }

/* Section heading */
.sec-head { display: flex; align-items: baseline; gap: 12px; padding-bottom: 12px; border-bottom: 1.5px solid var(--copper); }
.sec-letter { font-size: 26px; font-weight: 700; color: var(--copper); }
.sec-title { margin: 0; font-size: 26px; line-height: 1.2; font-weight: 700; letter-spacing: -0.015em; flex: 1; }
.sec-time { font-size: 13px; color: var(--muted); white-space: nowrap; }
.sec-intro { margin: 14px 0 0; color: var(--grey); font-size: 15.5px; }

.welcome h1 { margin: 0 0 14px; font-size: clamp(30px, 4.4vw, 40px); line-height: 1.12; font-weight: 700; letter-spacing: -0.025em; }
.welcome p { margin: 0 0 12px; color: var(--grey); font-size: 16.5px; max-width: 60ch; }
.legend { display: flex; align-items: center; gap: 10px; margin: 18px 0 30px; font-size: 14px; color: var(--ink); }
.legend .dot { width: 22px; height: 22px; border-radius: 50%; background: var(--copper); color: #fff; font-size: 11px; font-weight: 700; display: grid; place-items: center; flex: none; }

/* Questions */
.q { margin-top: 28px; }
.q-label { display: flex; gap: 12px; align-items: flex-start; font-weight: 600; font-size: 15.5px; line-height: 1.45; }
.num {
  flex: none; width: 24px; height: 24px; margin-top: -1px; border-radius: 50%;
  background: var(--ink); color: #fff; font-size: 11px; font-weight: 700;
  display: grid; place-items: center; font-variant-numeric: tabular-nums;
}
.q.key .num { background: var(--copper); }
.q .field { margin: 10px 0 0 36px; }
.hint { display: block; margin-top: 4px; font-weight: 400; font-size: 13.5px; color: var(--muted); }

input[type="text"], input[type="email"], input[type="tel"], input[type="password"], textarea, select {
  width: 100%; font: inherit; font-size: 15.5px; color: var(--ink);
  background: var(--field); border: 0; border-bottom: 1.5px solid var(--tan); border-radius: 4px 4px 0 0;
  padding: 11px 12px; transition: border-color .15s, background .15s;
}
textarea { resize: vertical; min-height: 52px; line-height: 1.5; }
input:hover, textarea:hover, select:hover { border-bottom-color: var(--copper); }
input:focus, textarea:focus, select:focus { outline: none; background: #fff; border-bottom-color: var(--copper); box-shadow: 0 0 0 2px rgba(184,129,81,.28); }
select { appearance: none; padding-right: 30px; background-image: linear-gradient(45deg, transparent 50%, var(--grey) 50%), linear-gradient(135deg, var(--grey) 50%, transparent 50%); background-position: calc(100% - 16px) 52%, calc(100% - 11px) 52%; background-size: 5px 5px; background-repeat: no-repeat; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 18px; margin-top: 26px; }
.grid2 .full { grid-column: 1 / -1; }
.fl { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.fl .req { color: var(--copper); }
.err { display: block; color: var(--danger); font-size: 13px; margin-top: 5px; }
[aria-invalid="true"] { border-bottom-color: var(--danger) !important; }

/* Checklist */
.checks { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 18px; margin: 16px 0 0 36px; }
.check { display: flex; gap: 10px; align-items: flex-start; padding: 7px 0; font-size: 15px; cursor: pointer; }
.check input { appearance: none; flex: none; width: 18px; height: 18px; margin: 2px 0 0; border: 1.5px solid var(--tan); border-radius: 4px; background: var(--field); display: grid; place-items: center; cursor: pointer; }
.check input:checked { background: var(--copper); border-color: var(--copper); }
.check input:checked::after { content: ""; width: 9px; height: 5px; border: 2px solid #fff; border-top: 0; border-right: 0; transform: rotate(-45deg) translate(1px, -1px); }
.check input:focus-visible { outline: 2px solid var(--copper); outline-offset: 2px; }
.other { margin: 6px 0 0 36px; }

/* Row tables (competitors, channels) */
.rows { margin: 14px 0 0 36px; }
.row { display: grid; gap: 10px; padding: 14px 0; border-top: 1px solid var(--rule); }
.row:last-child { border-bottom: 1px solid var(--rule); }
.row-title { font-weight: 600; font-size: 14.5px; }
.row-fields { display: grid; gap: 10px; }
.comp .row-fields { grid-template-columns: 1fr 1fr; }
.chan .row-fields { grid-template-columns: 110px 110px 1fr 110px; }
.mini { font-size: 12px; color: var(--muted); display: block; margin-bottom: 3px; }
.row input, .row select { font-size: 14.5px; padding: 9px 10px; }

/* Nav buttons */
.nav { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--rule); }
.btn { font: inherit; font-size: 15px; font-weight: 600; border-radius: 8px; padding: 12px 22px; cursor: pointer; border: 1.5px solid transparent; }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--char); }
.btn-send { background: var(--copper); color: #fff; }
.btn-send:hover { background: var(--copper-dk); }
.btn-ghost { background: none; color: var(--grey); border-color: var(--rule); }
.btn-ghost:hover { color: var(--ink); border-color: var(--tan); }
.btn:focus-visible, .rail button:focus-visible, a:focus-visible { outline: 2px solid var(--copper); outline-offset: 2px; }
.btn[disabled] { opacity: .6; cursor: progress; }

/* Review */
.review-list { list-style: none; margin: 22px 0 0; padding: 0; }
.review-list li { display: flex; justify-content: space-between; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--rule); font-size: 15px; }
.review-list button { font: inherit; color: var(--copper-dk); background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.missing { margin-top: 26px; padding: 16px 18px; background: var(--field); border-left: 3px solid var(--copper); border-radius: 0 6px 6px 0; font-size: 14.5px; }
.missing p { margin: 0 0 8px; font-weight: 600; }
.missing ul { margin: 0; padding-left: 18px; color: var(--grey); }
.notice { margin-top: 20px; padding: 14px 16px; border-radius: 6px; font-size: 14.5px; }
.notice.error { background: #fbeceb; color: var(--danger); }

.done-screen { padding-top: 12px; }
.done-screen h1 { font-size: clamp(28px, 4vw, 36px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 14px; }
.done-screen p { color: var(--grey); font-size: 16.5px; max-width: 58ch; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.foot { max-width: 1080px; margin: 0 auto; padding: 22px 24px 30px; border-top: 1px solid var(--rule); display: flex; gap: 20px; flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--copper-dk); }

/* Mobile */
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; gap: 0; padding-top: 0; }
  .rail { position: static; overflow-x: auto; margin: 0 -24px 26px; padding: 10px 24px; border-bottom: 1px solid var(--rule); }
  .rail ol { display: flex; gap: 4px; }
  .rail li + li { margin-top: 0; }
  .rail button { width: auto; white-space: nowrap; padding: 6px 10px; }
  .rail .label, .rail .count { display: none; }
  .rail button[aria-current="step"] .label { display: inline; }
  .rail-note { display: none; }
  .top-title { display: none; }
  .layout { padding-top: 0; }
}
@media (max-width: 600px) {
  .grid2, .checks, .comp .row-fields { grid-template-columns: 1fr; }
  .chan .row-fields { grid-template-columns: 1fr 1fr; }
  .q .field, .checks, .rows, .other { margin-left: 0; }
  .sec-title, .sec-letter { font-size: 22px; }
  .nav .btn { flex: 1; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}

.missing .linkish { font: inherit; font-size: 14px; color: var(--grey); background: none; border: 0; padding: 2px 0; text-align: left; cursor: pointer; }
.missing .linkish:hover { color: var(--copper-dk); text-decoration: underline; text-underline-offset: 3px; }
main a { color: var(--copper-dk); text-underline-offset: 3px; }