:root {
  color-scheme: light;
  --ink: #191918;
  --muted: #6e6a64;
  --paper: #f7f4ef;
  --card: #fffdfa;
  --white: #ffffff;
  --line: #d8cec1;
  --line-soft: #ebe4da;
  --orange: #e94b25;
  --orange-dark: #c83818;
  --gold: #c99a42;
  --gold-light: #e5bf74;
  --wine: #782b1b;
  --dark: #242321;
  --shadow: 0 24px 64px rgba(52, 43, 33, .13);
  --radius-lg: 24px;
  --radius-md: 16px;
  --font: "Segoe UI Variable Text", "Segoe UI", Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(95, 75, 55, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(95, 75, 55, .045) 1px, transparent 1px);
  background-size: 52px 52px;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.site-header {
  min-height: 98px;
  padding: 18px clamp(22px, 4vw, 64px);
  background: #252525;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { color: inherit; display: flex; align-items: center; gap: 18px; min-width: 0; text-decoration: none; }
.brand-rshch { display: block; flex: 0 0 132px; width: 132px; }
.brand-rshch img { display: block; width: 100%; height: auto; }
.brand-chessopen { display: block; flex: 0 1 142px; width: 142px; max-width: 34vw; height: auto; }
.header-meta { display: flex; align-items: center; gap: 18px; }
.privacy-pill { border: 1px solid rgba(255,255,255,.28); border-radius: 999px; padding: 8px 14px; font-size: 13px; font-weight: 700; }
.privacy-pill span { color: #6bbf77; font-size: 10px; margin-right: 5px; }
.header-time { color: #d9d5cf; font-size: 14px; }

main { padding: 30px clamp(16px, 3.2vw, 48px) 64px; }
.hero {
  max-width: 1180px;
  margin: 0 auto 24px;
  padding: clamp(28px, 3.8vw, 46px);
  min-height: 0;
  border: 1px solid #e0d8ce;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 94% 95%, rgba(201,154,66,.19) 0, rgba(201,154,66,.05) 24%, transparent 25%),
    linear-gradient(135deg, rgba(255,255,255,.98), rgba(255,249,239,.92));
  box-shadow: 0 14px 36px rgba(44,34,24,.07);
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(290px, .74fr);
  align-items: center;
  gap: clamp(34px, 6vw, 72px);
  overflow: hidden;
  position: relative;
}
.hero::before { content: ""; position: absolute; inset: 0 0 0 auto; width: 34%; opacity: .36; pointer-events: none; background-image: linear-gradient(45deg, rgba(201,154,66,.08) 25%, transparent 25%, transparent 75%, rgba(201,154,66,.08) 75%), linear-gradient(45deg, rgba(201,154,66,.08) 25%, transparent 25%, transparent 75%, rgba(201,154,66,.08) 75%); background-position: 0 0, 24px 24px; background-size: 48px 48px; mask-image: linear-gradient(90deg, transparent, #000 38%); }
.hero-copy, .hero-card { position: relative; z-index: 1; }
.eyebrow { margin: 0 0 18px; color: #9e3723; text-transform: uppercase; letter-spacing: .18em; font-weight: 800; font-size: 12px; }
h1 { margin: 0; max-width: 760px; font-size: clamp(38px, 4.5vw, 60px); line-height: .98; letter-spacing: -.045em; font-weight: 850; }
h1 span { color: var(--orange); }
.research-partners { min-height: 28px; margin-bottom: 14px; color: #9e3723; font-size: 11px; font-weight: 850; letter-spacing: .06em; }
.hero-lead { margin: 19px 0 16px; max-width: 600px; color: #5c5853; font-size: clamp(16px, 1.35vw, 18px); line-height: 1.45; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-facts span { padding: 6px 10px; border: 1px solid #e4d7c5; border-radius: 999px; background: rgba(255,253,248,.82); color: #5d554c; font-size: 12px; font-weight: 750; }
.hero-quest { display: inline-grid; grid-template-columns: 38px 1fr; gap: 11px; align-items: center; margin: 0 0 18px; padding: 10px 14px 10px 10px; border: 1px solid #ead9ba; border-radius: 14px; background: rgba(255,253,248,.78); box-shadow: 0 8px 18px rgba(67,49,30,.05); }
.hero-quest > span { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; background: linear-gradient(145deg, var(--gold-light), var(--gold)); color: #352818; font-size: 21px; }
.hero-quest p { margin: 0; color: #766754; font-size: 12px; line-height: 1.35; }
.hero-quest strong { color: #3d3328; font-size: 13px; }
.hero-note { display: flex; align-items: center; gap: 9px; margin: 0; color: #57534e; font-size: 14px; }
.hero-note span { width: 24px; height: 24px; display: grid; place-items: center; border-radius: 50%; background: #e8f3e8; color: #277b39; font-weight: 850; }
.hero-card {
  min-height: 0;
  padding: 25px 27px;
  border-radius: 20px;
  background: #252525;
  color: #fff;
  box-shadow: 0 20px 40px rgba(29,27,24,.2);
  position: relative;
  overflow: hidden;
}
.hero-card::after { content: ""; position: absolute; right: -75px; bottom: -90px; width: 200px; height: 200px; border-radius: 50%; background: rgba(201,154,66,.13); }
.hero-card-brand { position: relative; z-index: 1; display: flex; align-items: center; gap: 12px; width: 100%; min-height: 42px; margin-bottom: 16px; }
.hero-card-brand img { display: block; height: auto; }
.hero-card-rshch { width: 88px; }
.hero-card-chessopen { width: 108px; }
.hero-card-brand-divider { width: 1px; height: 30px; flex: 0 0 1px; background: rgba(255,255,255,.25); }
.card-kicker { margin: 0 0 9px; color: var(--gold-light); font-size: 10px; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.chess-corners { display: flex; margin-bottom: 24px; }
.chess-corners span { width: 42px; height: 42px; margin-right: -8px; display: grid; place-items: center; border: 2px solid var(--dark); border-radius: 50%; background: #f6eee4; color: var(--dark); font-size: 23px; }
.chess-corners span:nth-child(2) { background: var(--orange); color: #fff; }
.chess-corners span:nth-child(3) { background: var(--gold); color: var(--dark); }
.hero-stat { display: flex; align-items: baseline; gap: 10px; }
.hero-stat strong { font-size: 36px; line-height: 1; letter-spacing: -.04em; }
.hero-stat span { color: #dad5ce; }
.hero-card-line { height: 1px; background: rgba(255,255,255,.13); margin: 18px 0; }
.hero-card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.hero-card-grid div { display: flex; flex-direction: column; }
.hero-card-grid strong { font-size: 20px; }
.hero-card-grid span { color: #bdb7ae; font-size: 12px; }
.hero-card > p:not(.card-kicker) { margin: 20px 0 0; max-width: 310px; color: #c8c2ba; font-size: 13px; position: relative; z-index: 1; }

.survey-layout { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 24px; align-items: start; }
.survey-sidebar { padding: 30px 10px 0; position: sticky; top: 20px; }
.sidebar-label { margin: 0 0 22px 14px; color: #77716a; text-transform: uppercase; letter-spacing: .18em; font-size: 11px; font-weight: 800; }
.steps-list { list-style: none; margin: 0; padding: 0; }
.steps-list li { margin: 0; padding: 0; border-radius: 14px; color: #8b857e; transition: background .2s ease, color .2s ease, box-shadow .2s ease; }
.step-button { width: 100%; display: grid; grid-template-columns: 42px 1fr; gap: 13px; align-items: center; padding: 13px 14px; border: 0; border-radius: inherit; background: transparent; color: inherit; font: inherit; text-align: left; cursor: pointer; transition: background .2s ease, color .2s ease, transform .16s ease; }
.step-button > span { width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid #d4cabe; border-radius: 50%; font-size: 11px; font-weight: 800; }
.step-button strong, .step-button small { display: block; }
.step-button strong { font-size: 14px; }
.step-button small { margin-top: 2px; font-size: 12px; color: inherit; opacity: .78; }
.step-button:hover { background: rgba(255,255,255,.68); color: #4f4a44; transform: translateX(2px); }
.step-button:focus-visible { outline: 3px solid rgba(233,75,37,.2); outline-offset: 3px; }
.steps-list li.is-current { background: #fff; color: var(--ink); box-shadow: 0 8px 26px rgba(52,43,33,.08); }
.steps-list li.is-current .step-button > span { background: var(--orange); border-color: var(--orange); color: #fff; }
.steps-list li.is-complete { color: #4f4a44; }
.steps-list li.is-complete .step-button > span { border-color: #c7a566; background: #f5e8cb; color: #74541e; }
.sidebar-card { display: grid; grid-template-columns: 34px 1fr; gap: 10px; margin: 28px 14px 0; padding: 16px; border-top: 1px solid var(--line); color: #68625c; }
.sidebar-card > span { color: var(--orange); font-size: 25px; }
.sidebar-card p { margin: 0; font-size: 12px; line-height: 1.45; }
.sidebar-card strong { color: #403d39; }

.survey-card { min-height: 620px; border: 1px solid #ded2c3; border-top: 3px solid var(--gold); border-left: 4px solid var(--orange); border-radius: var(--radius-lg); background: rgba(255,255,255,.96); box-shadow: var(--shadow); overflow: hidden; }
.survey-progress { display: none; }
.progress-copy { display: flex; justify-content: space-between; gap: 16px; margin-bottom: 12px; color: #77716a; font-size: 12px; }
.progress-copy span { text-transform: uppercase; letter-spacing: .12em; font-weight: 800; }
.progress-copy strong { color: #4d4944; }
.progress-track { height: 8px; border-radius: 99px; background: #e9dfd2; overflow: hidden; box-shadow: inset 0 1px 2px rgba(50,35,21,.08); }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--orange), #ef7740 62%, var(--gold-light)); transition: width .38s cubic-bezier(.2,.75,.3,1); }
.move-navigation { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px; align-items: center; margin-top: 14px; }
.move-navigation > span { color: #776d63; font-size: 10px; font-weight: 850; letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; }
.move-pills { display: flex; gap: 5px; min-width: 0; padding: 2px; overflow-x: auto; scrollbar-width: thin; scrollbar-color: #cdbca8 transparent; }
.move-pill { flex: 0 0 27px; width: 27px; height: 27px; border: 1px solid #d9cdbc; border-radius: 8px; background: rgba(255,255,255,.78); color: #786e62; font: inherit; font-size: 10px; font-weight: 800; line-height: 1; cursor: pointer; transition: transform .16s ease, background .16s ease, border-color .16s ease, color .16s ease, box-shadow .16s ease; }
.move-pill:hover { transform: translateY(-1px); border-color: #b58c49; background: #fffaf0; color: #6e4d1d; }
.move-pill:focus-visible { outline: 3px solid rgba(233,75,37,.2); outline-offset: 2px; }
.move-pill.is-complete { border-color: #d9bd84; background: #f9efd9; color: #806026; }
.move-pill.is-current { border-color: var(--orange); background: var(--orange); color: #fff; box-shadow: 0 5px 12px rgba(201,57,25,.24); }
.progress-game { display: grid; grid-template-columns: 38px minmax(0,1fr) auto; gap: 10px; align-items: center; margin-top: 17px; padding: 10px 12px 10px 10px; border: 1px solid #eadcca; border-radius: 14px; background: rgba(255,255,255,.72); }
.progress-piece { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 10px; background: var(--dark); color: var(--gold-light); font-size: 20px; box-shadow: 0 6px 13px rgba(25,22,18,.16); }
.progress-game strong, .progress-game small { display: block; }
.progress-game strong { color: #43382d; font-size: 12px; }
.progress-game small { margin-top: 2px; color: #7d7163; font-size: 11px; line-height: 1.35; }
.progress-counter { align-self: center; padding: 5px 8px; border-radius: 999px; background: #f7ead1; color: #765723; font-size: 10px; font-weight: 850; white-space: nowrap; }
.progress-game.is-celebrating { animation: progress-celebrate .52s ease both; }
@keyframes progress-celebrate { 45% { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(201,154,66,.22); } }

#survey-form { padding: clamp(28px, 5vw, 50px) clamp(22px, 5vw, 56px) 26px; }
.question-page { display: none; }
.question-page.is-active { display: block; animation: page-in .28s ease both; }
@keyframes page-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.section-heading { margin-bottom: 38px; }
.section-heading .eyebrow { margin-bottom: 10px; }
.section-heading h2 { margin: 0 0 10px; font-size: clamp(30px, 3.4vw, 44px); line-height: 1.08; letter-spacing: -.035em; }
.section-heading p:last-child { margin: 0; max-width: 620px; color: var(--muted); }
.question-topline { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin: 0 0 28px; padding-bottom: 14px; border-bottom: 1px solid var(--line-soft); color: #807565; font-size: 12px; }
.question-topline span { color: #9e3723; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.question-topline strong { color: #6e6050; font-size: 11px; }
.question { margin: 0; padding: 0 0 34px; border: 0; }
.question + .question { padding-top: 34px; border-top: 1px solid var(--line-soft); }
.question legend { width: 100%; margin: 0 0 16px; padding: 0; font-size: 20px; line-height: 1.3; font-weight: 780; }
.question-number { color: var(--orange); margin-right: 8px; font-size: 14px; vertical-align: 2px; }
.question-hint { display: block; margin: -8px 0 16px; color: #817b74; font-size: 13px; }
.question-coach-tip { display: grid; grid-template-columns: 25px 1fr; gap: 8px; align-items: start; margin: -4px 0 16px; padding: 10px 12px; border-left: 2px solid var(--gold); border-radius: 0 10px 10px 0; background: #fbf5e9; color: #75695c; font-size: 12px; line-height: 1.4; }
.question-coach-tip > span:first-child { color: #aa7824; font-size: 17px; line-height: 1; }
.question-coach-tip strong { display: block; margin-bottom: 1px; color: #6d4c17; font-size: 10px; letter-spacing: .09em; text-transform: uppercase; }
.auto-next-note { margin: 13px 2px 0; color: #8a7c6b; font-size: 11px; }
.auto-next-note span { color: var(--gold); font-size: 13px; }
.choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.choice { position: relative; }
.choice input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.choice label { min-height: 54px; height: 100%; padding: 13px 14px 13px 48px; border: 1px solid #ded5c9; border-radius: 13px; background: linear-gradient(145deg, #fffefa, #fffaf4); display: flex; align-items: center; color: #3e3b37; cursor: pointer; transition: border-color .16s ease, background .16s ease, box-shadow .16s ease, transform .16s ease; position: relative; }
.choice label::before { content: ""; position: absolute; left: 16px; top: 50%; width: 18px; height: 18px; transform: translateY(-50%); border: 1.5px solid #b7aea3; border-radius: 50%; background: #fff; }
.choice input[type="checkbox"] + label::before { border-radius: 5px; }
.choice label:hover { border-color: #bf9b62; background: #fffdf8; transform: translateY(-2px); box-shadow: 0 8px 18px rgba(64,46,27,.08); }
.choice input:focus-visible + label { outline: 3px solid rgba(233,75,37,.18); outline-offset: 2px; border-color: var(--orange); }
.choice input:checked + label { border-color: var(--orange); background: linear-gradient(135deg, #fff8ef, #fff0e8); box-shadow: inset 0 0 0 1px var(--orange), 0 7px 14px rgba(201,77,35,.09); color: #24211e; }
.choice input:checked + label::before { border: 5px solid var(--orange); }
.choice input[type="checkbox"]:checked + label::before { content: "✓"; border: 0; background: var(--orange); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 900; }
.choice input:disabled + label { opacity: .48; cursor: not-allowed; transform: none; }
.other-field { margin-top: 10px; }
.other-field input { width: 100%; height: 54px; border: 1px solid #cfc5b8; border-radius: 13px; padding: 0 16px; background: #fff; color: var(--ink); }
.other-field input:focus { outline: 3px solid rgba(233,75,37,.14); border-color: var(--orange); }
.limit-status { min-height: 20px; margin: 9px 2px 0; color: #796e62; font-size: 12px; }
.question-error { display: none; margin: 10px 2px 0; color: #b62d18; font-size: 13px; font-weight: 650; }
.question[aria-invalid="true"] .question-error { display: block; }
.question[aria-invalid="true"] legend { color: #a72d1b; }

.lead-box { margin-top: 36px; padding: clamp(22px, 4vw, 34px); border: 1px solid #d8c8b1; border-radius: 18px; background: linear-gradient(145deg, #fffaf2, #f8efe0); position: relative; overflow: hidden; }
.lead-box::after { content: "♞"; position: absolute; right: -14px; top: -34px; color: rgba(201,154,66,.11); font-size: 150px; line-height: 1; transform: rotate(-8deg); pointer-events: none; }
.lead-box > * { position: relative; z-index: 1; }
.lead-kicker { margin: 0 0 9px; color: #9e3723; text-transform: uppercase; letter-spacing: .16em; font-size: 11px; font-weight: 850; }
.lead-box h3 { margin: 0 0 10px; max-width: 620px; font-size: clamp(24px, 3.2vw, 34px); line-height: 1.12; letter-spacing: -.025em; }
.lead-intro { margin: 0 0 22px; max-width: 660px; color: #6b635a; }
.lead-box .choices { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.contact-panel { margin-top: 22px; padding-top: 24px; border-top: 1px solid #ddcfba; }
.contact-panel h4 { margin: 0 0 6px; font-size: 19px; }
.contact-panel > p { margin: 0 0 18px; color: #766d63; font-size: 13px; }
.contact-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.contact-field { display: flex; flex-direction: column; gap: 7px; }
.contact-field.is-wide { grid-column: 1 / -1; }
.contact-field label { font-size: 12px; color: #5f5850; font-weight: 750; }
.contact-field input, .contact-field select { width: 100%; height: 52px; border: 1px solid #cfc0aa; border-radius: 12px; padding: 0 14px; background: #fff; color: var(--ink); font: inherit; }
.contact-field input:focus, .contact-field select:focus { outline: 3px solid rgba(233,75,37,.14); border-color: var(--orange); }
.contact-field small { color: #8b8176; font-size: 11px; }
.consent-list { display: grid; gap: 10px; margin-top: 18px; }
.consent-row { position: relative; display: grid; grid-template-columns: 20px 1fr; gap: 10px; align-items: start; color: #544e47; font-size: 12px; line-height: 1.45; cursor: pointer; }
.consent-row input { width: 18px; height: 18px; margin: 1px 0 0; accent-color: var(--orange); }
.consent-row a { color: #8c2f1c; font-weight: 700; }
.contact-error { margin: 14px 0 0; padding: 11px 13px; border-radius: 10px; background: #fff0ec; color: #a72d1b; font-size: 13px; }
.honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }

.form-error { margin: 0 0 18px; padding: 13px 15px; border-radius: 12px; background: #fff0ec; color: #a72d1b; font-size: 14px; }
.form-actions { margin-top: 8px; padding-top: 26px; border-top: 1px solid var(--line-soft); display: flex; justify-content: flex-end; gap: 12px; }
.button { min-height: 52px; padding: 0 22px; border-radius: 13px; border: 1px solid transparent; font-weight: 760; cursor: pointer; transition: transform .16s ease, box-shadow .16s ease, background .16s ease; }
.button:hover { transform: translateY(-1px); }
.button:focus-visible { outline: 3px solid rgba(233,75,37,.24); outline-offset: 2px; }
.button-primary { background: linear-gradient(135deg, #ed5c32, var(--orange-dark)); color: #fff; box-shadow: 0 10px 24px rgba(201,57,25,.25); }
.button-primary:hover { background: linear-gradient(135deg, #f07141, #b72f16); box-shadow: 0 13px 30px rgba(201,57,25,.3); }
.button-secondary { background: #fff; color: var(--ink); border-color: #d2c7b9; }
#back-button { margin-right: auto; }
.button[disabled] { opacity: .55; cursor: wait; transform: none; }
.save-status { margin: 15px 0 0; text-align: right; color: #8a847c; font-size: 11px; }

.success { padding: clamp(54px, 8vw, 90px) clamp(24px, 8vw, 90px); text-align: center; }
.success-mark { width: 72px; height: 72px; margin: 0 auto 24px; border-radius: 50%; display: grid; place-items: center; background: var(--orange); color: #fff; font-size: 34px; font-weight: 900; box-shadow: 0 14px 30px rgba(216,61,28,.24); }
.success .eyebrow { margin-bottom: 12px; }
.success h2 { margin: 0 0 14px; font-size: clamp(38px, 6vw, 62px); line-height: 1; letter-spacing: -.045em; }
.success > p:not(.eyebrow) { max-width: 560px; margin: 0 auto 28px; color: var(--muted); font-size: 17px; }
.success-code { width: min(320px, 100%); margin: 0 auto 26px; padding: 13px 18px; border: 1px dashed #c9b89f; border-radius: 12px; display: flex; justify-content: space-between; background: #f9f4eb; }
.success-code span { color: var(--muted); }
.success-code strong { letter-spacing: .08em; }
.school-success { max-width: 480px; margin: 0 auto 28px; padding: 22px; border: 1px solid #e4c67d; border-radius: 16px; background: linear-gradient(135deg, #fff8df, #fffdf7); text-align: left; }
.school-success-title { margin: 0 0 7px; color: #9b5318; font-weight: 900; font-size: 18px; }
.school-success > p:not(.school-success-title):not(.promo-note) { margin: 0 0 16px; color: var(--muted); font-size: 14px; line-height: 1.45; }
.promo-card { padding: 15px 17px; border-radius: 12px; background: var(--dark); color: #fff; display: grid; gap: 5px; }
.promo-card span { color: #f5d98d; font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; }
.promo-card strong { font-size: clamp(25px, 6vw, 34px); letter-spacing: .1em; }
.promo-note { margin: 13px 0 0; color: #746654; font-size: 12px; }

.site-footer { min-height: 90px; padding: 24px clamp(22px, 4vw, 64px); background: var(--dark); color: #bdb8b1; display: flex; justify-content: space-between; align-items: center; gap: 20px; font-size: 12px; }
.noscript { position: fixed; inset: auto 20px 20px; padding: 14px; border-radius: 10px; background: #711; color: #fff; z-index: 10; }

body.is-embedded .site-header, body.is-embedded .site-footer { display: none; }
body.is-embedded main { padding-top: 14px; padding-bottom: 20px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-card { min-height: 0; }
  .survey-layout { grid-template-columns: 1fr; }
  .survey-sidebar { position: static; padding: 0; }
  .sidebar-label, .sidebar-card { display: none; }
  .steps-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .step-button { display: flex; justify-content: center; padding: 8px; }
  .step-button > div { display: none; }
  .step-button > span { width: 34px; height: 34px; }
}

@media (max-width: 640px) {
  .site-header { min-height: 78px; padding: 14px 18px; }
  .brand { gap: 12px; }
  .brand-rshch { flex-basis: 91px; width: 91px; }
  .brand-chessopen { width: 94px; max-width: 27vw; }
  .header-time { display: none; }
  .privacy-pill { padding: 7px 10px; }
  main { padding: 16px 10px 40px; }
  .hero { min-height: 0; margin-bottom: 12px; padding: 28px 20px; border-radius: 18px; }
  h1 { font-size: clamp(34px, 11vw, 46px); }
  .research-partners { margin-bottom: 10px; font-size: 10px; letter-spacing: .03em; }
  .hero-lead { font-size: 16px; }
  .hero-note { align-items: flex-start; font-size: 12px; }
  .hero-note span { flex: 0 0 auto; }
  .hero-card { padding: 22px; border-radius: 16px; }
  .hero-card-brand { gap: 10px; margin-bottom: 13px; }
  .hero-card-rshch { width: 80px; }
  .hero-card-chessopen { width: 96px; }
  .survey-layout { gap: 12px; }
  .survey-card { border-left-width: 2px; border-radius: 18px; }
  .survey-progress { padding: 13px 16px 12px; }
  .progress-copy { margin-bottom: 8px; font-size: 10px; }
  .progress-copy span { letter-spacing: .09em; }
  .progress-track { height: 6px; }
  .move-navigation { display: none; }
  .progress-game { display: none; }
  #survey-form { padding: 20px 17px 20px; }
  .question-page.is-active { animation: none; }
  .section-heading { margin-bottom: 18px; }
  .section-heading .eyebrow { margin-bottom: 5px; font-size: 9px; }
  .section-heading h2 { margin-bottom: 0; font-size: 25px; }
  .section-heading p:last-child { display: none; }
  .question-topline { margin-bottom: 14px; padding-bottom: 10px; font-size: 10px; }
  .question-topline strong { font-size: 10px; }
  .question { padding-bottom: 28px; }
  .question + .question { padding-top: 28px; }
  .question legend { font-size: 18px; }
  .question-hint { margin: -8px 0 12px; font-size: 12px; }
  .question-coach-tip { grid-template-columns: 20px 1fr; gap: 7px; margin: -2px 0 12px; padding: 7px 9px; font-size: 11px; }
  .question-coach-tip > span:first-child { font-size: 14px; }
  .auto-next-note { display: none; }
  .choices { grid-template-columns: 1fr; }
  .question.is-multiple .question-coach-tip { display: none; }
  .question.is-multiple .choices { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
  .question.is-multiple .choice label { min-height: 44px; padding: 8px 8px 8px 34px; font-size: 11px; line-height: 1.25; }
  .question.is-multiple .choice label::before { left: 10px; width: 15px; height: 15px; }
  .lead-box .choices, .contact-grid { grid-template-columns: 1fr; }
  .contact-field.is-wide { grid-column: auto; }
  .choice label { min-height: 48px; padding: 10px 12px 10px 44px; }
  .choice label::before { left: 14px; width: 17px; height: 17px; }
  body.is-multiple-question #survey-form { padding-bottom: 92px; }
  body.is-multiple-question .form-actions { position: fixed; right: 10px; bottom: calc(8px + env(safe-area-inset-bottom)); left: 10px; z-index: 20; flex-wrap: nowrap; margin: 0; padding: 8px; border: 1px solid #dccbb7; border-radius: 14px; background: rgba(255,255,255,.96); box-shadow: 0 10px 28px rgba(48,34,19,.18); backdrop-filter: blur(10px); }
  body.is-multiple-question .form-actions .button { min-height: 46px; }
  body.is-multiple-question #back-button { flex: 0 0 auto; margin-right: 0; }
  body.is-multiple-question #next-button { flex: 1 1 auto; }
  .form-actions { flex-wrap: wrap; }
  .button { flex: 1 1 auto; padding-inline: 15px; }
  #back-button { flex: 0 1 auto; }
  .save-status { text-align: center; }
  .site-footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}