:root {
    color-scheme: dark;
    --black: #050505;
    --panel: #0c0c0d;
    --panel-soft: #121214;
    --white: #f7f7f5;
    --silver: #b9b9be;
    --muted: #98989e;
    --line: rgba(255,255,255,.14);
    --line-strong: rgba(255,255,255,.34);
    --success: #b9dac3;
    --error: #ff9a9a;
    --radius: 22px;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { background: var(--black); scroll-behavior: smooth; }

body {
    margin: 0;
    min-width: 320px;
    background:
        radial-gradient(circle at 15% 18%, rgba(255,255,255,.06), transparent 26rem),
        var(--black);
    color: var(--white);
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: 300;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.site-header {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 50;
    height: 78px;
    padding: 0 clamp(22px, 4vw, 64px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(5,5,5,.86);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(18px);
}

.brand {
    text-decoration: none;
    font-size: 15px;
    letter-spacing: .5em;
    font-weight: 400;
}

.back-link {
    color: var(--silver);
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
    text-decoration: none;
}

.back-link::before { content: "←"; margin-right: 10px; }
.back-link:hover { color: #fff; }

main {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(320px, .78fr) minmax(620px, 1.22fr);
    padding-top: 78px;
}

.intro-panel {
    min-height: calc(100vh - 78px);
    padding: clamp(64px, 7vw, 112px) clamp(34px, 6vw, 92px);
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: sticky;
    top: 78px;
    align-self: start;
}

.eyebrow {
    margin: 0 0 18px;
    color: var(--silver);
    font-size: 10px;
    font-weight: 400;
    letter-spacing: .32em;
    text-transform: uppercase;
    transition: color .4s ease, text-shadow .4s ease;
}

.eyebrow:hover { color: #fff; text-shadow: 0 0 10px rgba(255,255,255,.18); }

h1 {
    margin: 0;
    font-size: clamp(38px, 4.2vw, 68px);
    line-height: 1.04;
    font-weight: 200;
    letter-spacing: -.025em;
    text-transform: uppercase;
}

.lead {
    max-width: 540px;
    margin: 30px 0 40px;
    color: var(--silver);
    font-size: 15px;
    line-height: 1.85;
    transition: color .4s ease, text-shadow .4s ease;
}

.lead:hover { color: #e0e0e3; text-shadow: 0 0 12px rgba(255,255,255,.18); }

.bonus-card {
    max-width: 470px;
    padding: 28px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background: linear-gradient(140deg, rgba(255,255,255,.06), rgba(255,255,255,.015));
}

.bonus-card > span {
    display: block;
    color: var(--silver);
    font-size: 10px;
    letter-spacing: .24em;
    text-transform: uppercase;
    transition: color .4s ease;
}

.bonus-card:hover > span { color: #fff; }

.bonus-card strong {
    display: block;
    margin: 10px 0 12px;
    font-size: clamp(36px, 4vw, 58px);
    font-weight: 200;
    letter-spacing: -.02em;
}

.bonus-card p {
    margin: 0;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.65;
    transition: color .4s ease, text-shadow .4s ease;
}

.bonus-card:hover p { color: #e0e0e3; text-shadow: 0 0 12px rgba(255,255,255,.16); }

.trust-list { margin-top: 34px; }
.trust-list p { margin: 13px 0; color: var(--silver); font-size: 12px; letter-spacing: .05em; transition: color .4s ease, text-shadow .4s ease; }
.trust-list span { display: inline-block; width: 35px; color: var(--muted); font-size: 9px; letter-spacing: .12em; transition: color .4s ease; }
.trust-list p:hover { color: #fff; text-shadow: 0 0 10px rgba(255,255,255,.2); }
.trust-list p:hover span { color: #fff; }

.form-panel {
    min-height: calc(100vh - 78px);
    padding: clamp(40px, 6vw, 90px) clamp(22px, 6vw, 92px);
    display: flex;
    align-items: center;
}

.form-shell { width: 100%; max-width: 840px; margin: 0 auto; }

.form-heading { display: flex; justify-content: space-between; gap: 24px; align-items: end; }
.form-heading h2, .success-panel h2 { margin: 0; font-size: clamp(27px, 3vw, 42px); font-weight: 250; letter-spacing: -.02em; }
.form-heading .eyebrow { margin-bottom: 10px; }
.step-label { color: rgba(255,255,255,.68); font-size: 11px; font-weight: 400; letter-spacing: .12em; text-transform: uppercase; white-space: nowrap; transition: color .4s ease; }
.step-label:hover { color: #fff; }

.stepper {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin: 38px 0 52px;
    padding: 0;
}

.stepper li { position: relative; color: rgba(255,255,255,.68); font-weight: 400; transition: color .4s ease, text-shadow .4s ease; }
.stepper li::after { content: ""; position: absolute; top: 13px; left: 32px; right: 8px; height: 1px; background: rgba(255,255,255,.24); }
.stepper li:last-child::after { display: none; }
.stepper span { position: relative; z-index: 1; display: grid; place-items: center; width: 27px; height: 27px; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; background: var(--black); font-size: 10px; font-weight: 400; }
.stepper em { display: block; margin-top: 10px; font-size: 10px; font-weight: 400; letter-spacing: .11em; text-transform: uppercase; font-style: normal; }
.stepper .is-active, .stepper .is-complete { color: var(--white); font-weight: 500; text-shadow: 0 0 9px rgba(255,255,255,.16); }
.stepper .is-active span { background: var(--white); color: var(--black); }
.stepper .is-complete span { border-color: var(--white); }
.stepper .is-complete::after { background: rgba(255,255,255,.52); }
.stepper li:hover { color: #fff; }

fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
fieldset[hidden] { display: none; }
legend { padding: 0; font-size: 20px; font-weight: 350; letter-spacing: .02em; }
.step-description { margin: 12px 0 34px; max-width: 690px; color: rgba(255,255,255,.5); font-size: 15px; line-height: 2; font-weight: 300; letter-spacing: .05em; transition: color .4s ease, text-shadow .4s ease; }
.step-description:hover { color: #fff; text-shadow: 0 0 15px rgba(255,255,255,.2); }

.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 30px; }
.field-wide { grid-column: 1 / -1; }
.field label { display: block; margin-bottom: 9px; color: var(--silver); font-size: 11px; font-weight: 400; letter-spacing: .12em; text-transform: uppercase; transition: color .4s ease, text-shadow .4s ease; }
.field input {
    width: 100%;
    height: 48px;
    padding: 0 2px;
    border: 0;
    border-bottom: 1px solid var(--line-strong);
    border-radius: 0;
    outline: none;
    background: transparent;
    color: var(--white);
    font: inherit;
    font-size: 17px;
    transition: border-color .2s, box-shadow .2s;
}
.field input:focus { border-color: var(--white); box-shadow: 0 1px 0 var(--white); }
.field:hover label, .field:focus-within label { color: #fff; text-shadow: 0 0 8px rgba(255,255,255,.16); }
.field input::placeholder { color: #929298; opacity: 1; transition: color .4s ease; }
.field:hover input::placeholder, .field input:focus::placeholder { color: #c9c9cd; }
.field input.is-invalid { border-color: var(--error); }
.field-error { min-height: 16px; display: block; margin-top: 7px; color: var(--error); font-size: 12px; }
.contact-note { margin: 20px 0 0; color: rgba(255,255,255,.4); font-size: 12px; letter-spacing: .05em; transition: color .4s ease; }
.contact-note:hover { color: rgba(255,255,255,.9); }

.participation-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.participation-card { position: relative; display: grid; grid-template-columns: 22px 1fr; gap: 15px; min-height: 170px; padding: 24px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); cursor: pointer; transition: all .5s ease; }
.participation-card:hover, .participation-card:focus-within { border-color: rgba(255,255,255,.48); background: rgba(255,255,255,.04); transform: translateY(-5px); }
.participation-card:has(input:checked) { border-color: var(--white); background: rgba(255,255,255,.075); }
.participation-card input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: #fff; }
.participation-copy strong { display: block; margin-bottom: 13px; font-size: 14px; font-weight: 450; letter-spacing: .12em; text-transform: uppercase; transition: color .4s ease, text-shadow .4s ease; }
.participation-copy small { display: block; color: rgba(255,255,255,.4); font-size: 13px; line-height: 1.7; letter-spacing: .05em; transition: color .4s ease; }
.participation-card:hover .participation-copy strong,
.participation-card:focus-within .participation-copy strong { color: #fff; text-shadow: 0 0 12px rgba(255,255,255,.3); }
.participation-card:hover .participation-copy small,
.participation-card:focus-within .participation-copy small,
.participation-card:has(input:checked) .participation-copy small { color: rgba(255,255,255,.9); }
.choice-error { min-height: 18px; margin: 9px 0 0; color: var(--error); font-size: 11px; }
.conditional-panel { margin-top: 28px; padding: 26px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.018); }
.conditional-panel[hidden] { display: none; }
.conditional-panel h3 { margin: 0 0 8px; font-size: 14px; font-weight: 450; letter-spacing: .14em; text-transform: uppercase; }
.conditional-panel .field-grid { margin-top: 24px; }
.coordination-notice { margin: 0 0 26px; padding: 17px; border-left: 2px solid var(--line-strong); background: rgba(255,255,255,.025); color: rgba(255,255,255,.4); font-size: 13px; line-height: 1.7; letter-spacing: .05em; transition: color .4s ease, background .4s ease, border-color .4s ease; }
.coordination-notice:hover { color: rgba(255,255,255,.9); border-left-color: rgba(255,255,255,.68); background: rgba(255,255,255,.045); }
.field-label { display: block; margin-bottom: 12px; color: var(--silver); font-size: 11px; font-weight: 400; letter-spacing: .12em; text-transform: uppercase; transition: color .4s ease; }
.field-label:hover { color: #fff; }
.radio-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
.radio-row label { display: inline-flex; align-items: center; gap: 8px; min-height: 42px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; color: var(--silver); font-size: 13px; cursor: pointer; transition: color .4s ease, border-color .4s ease, background .4s ease; }
.radio-row label:hover { border-color: rgba(255,255,255,.58); color: #fff; background: rgba(255,255,255,.04); }
.radio-row label:has(input:checked) { border-color: var(--white); color: var(--white); background: rgba(255,255,255,.05); }
.radio-row input { width: 15px; height: 15px; margin: 0; accent-color: #fff; }

.review-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.review-grid article { padding: 25px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.review-grid h3 { margin: 0 0 20px; font-size: 13px; font-weight: 450; letter-spacing: .18em; text-transform: uppercase; }
dl { margin: 0; }
dl div { padding: 11px 0; border-bottom: 1px solid var(--line); }
dl div:last-child { border-bottom: 0; }
.review-grid dt { margin-bottom: 6px; color: rgba(255,255,255,.72); font-size: 11px; font-weight: 400; letter-spacing: .12em; text-transform: uppercase; transition: color .4s ease; }
.review-grid dd { margin: 0; color: var(--white); font-size: 15px; font-weight: 400; line-height: 1.55; overflow-wrap: anywhere; transition: color .4s ease, text-shadow .4s ease; }
.review-grid dl div:hover dt, .review-grid dl div:hover dd { color: #fff; text-shadow: 0 0 10px rgba(255,255,255,.16); }
.text-button { margin-top: 18px; padding: 0; border: 0; background: none; color: var(--white); font: inherit; font-size: 11px; letter-spacing: .08em; text-decoration: underline; cursor: pointer; }

.terms-preview { margin-top: 20px; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.terms-preview summary { padding: 19px 22px; color: rgba(255,255,255,.4); font-size: 13px; letter-spacing: .05em; cursor: pointer; transition: color .4s ease, background .4s ease; }
.terms-preview summary:hover { color: rgba(255,255,255,.9); background: rgba(255,255,255,.035); }
.terms-preview[open] summary { border-bottom: 1px solid var(--line); }
.terms-content { max-height: 360px; overflow-y: auto; padding: 24px; background: #f2f2ef; color: #171717; }
.terms-content h3 { margin: 0 0 18px; font-size: 16px; text-transform: uppercase; }
.terms-content h4 { margin: 20px 0 8px; font-size: 12px; text-transform: uppercase; }
.terms-content p { margin: 0 0 10px; font-family: Arial, sans-serif; font-size: 12px; line-height: 1.55; text-align: justify; }
.terms-content .bonus-clause { margin-top: 16px; padding: 13px; background: #deded9; font-weight: 700; }
.terms-content .confidential { color: #666; font-size: 10px; }

.consent-list { display: grid; gap: 13px; }
.check-row { display: grid; grid-template-columns: 21px 1fr; gap: 13px; align-items: start; padding: 17px; border: 1px solid var(--line); border-radius: 13px; color: var(--silver); font-size: 13px; line-height: 1.6; cursor: pointer; transition: color .4s ease, border-color .4s ease, background .4s ease; }
.check-row:hover { border-color: rgba(255,255,255,.5); color: #fff; background: rgba(255,255,255,.035); }
.check-row:has(input:checked) { border-color: var(--line-strong); background: rgba(255,255,255,.03); color: var(--white); }
.check-row input { width: 17px; height: 17px; margin: 1px 0 0; accent-color: #fff; }
.check-row a { text-underline-offset: 3px; }

.captcha-card { margin-top: 22px; min-height: 90px; display: flex; flex-wrap: wrap; gap: 18px; align-items: center; padding: 18px; border: 1px solid var(--line); border-radius: 13px; }
.captcha-card p { margin: 0; color: rgba(255,255,255,.4); font-size: 12px; letter-spacing: .05em; transition: color .4s ease; }
.captcha-card:hover p { color: rgba(255,255,255,.9); }

.form-alert { min-height: 20px; margin-top: 20px; color: var(--silver); font-size: 13px; line-height: 1.5; transition: color .4s ease; }
.form-alert:hover { color: #fff; }
.form-alert.error { color: var(--error); }
.form-alert.success { color: var(--success); }

.form-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 34px; padding-top: 24px; border-top: 1px solid var(--line); }
.button { min-height: 48px; padding: 0 25px; border: 1px solid var(--white); border-radius: 6px; font: inherit; font-size: 11px; font-weight: 500; letter-spacing: .18em; text-transform: uppercase; text-decoration: none; cursor: pointer; transition: opacity .2s, background .2s, color .2s; }
.button.primary { background: var(--white); color: var(--black); }
.button.secondary { background: transparent; color: var(--white); }
.button:hover { opacity: .78; }
.button:disabled { opacity: .4; cursor: wait; }

.success-panel { padding: 40px 0; text-align: center; }
.success-panel[hidden] { display: none; }
.success-mark { display: grid; place-items: center; width: 58px; height: 58px; margin: 0 auto 25px; border: 1px solid var(--line-strong); border-radius: 50%; color: var(--success); font-size: 25px; }
.success-panel p:not(.eyebrow) { max-width: 520px; margin: 20px auto; color: var(--silver); line-height: 1.7; transition: color .4s ease; }
.success-panel p:not(.eyebrow):hover { color: #fff; }
.offer-number { width: min(440px, 100%); margin: 28px auto; padding: 20px; border: 1px solid var(--line); border-radius: 14px; }
.offer-number span { display: block; margin-bottom: 7px; color: var(--muted); font-size: 9px; letter-spacing: .15em; text-transform: uppercase; transition: color .4s ease; }
.offer-number:hover span { color: #fff; }
.offer-number strong { font-size: 19px; font-weight: 350; letter-spacing: .08em; }
.success-panel .button { display: inline-flex; align-items: center; justify-content: center; }

.honeypot { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }

footer { padding: 30px clamp(22px, 4vw, 64px); display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 30px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; letter-spacing: .09em; text-transform: uppercase; }
footer a { color: var(--silver); text-decoration: none; }
footer a:hover { color: #fff; }

@media (max-width: 980px) {
    main { grid-template-columns: 1fr; }
    .intro-panel { min-height: auto; position: relative; top: auto; border-right: 0; border-bottom: 1px solid var(--line); }
    .form-panel { min-height: auto; }
}

@media (max-width: 620px) {
    .site-header { height: 66px; padding: 0 20px; }
    main { padding-top: 66px; }
    .intro-panel, .form-panel { padding: 46px 20px; }
    .intro-panel { min-height: auto; }
    .lead { margin: 24px 0 30px; }
    .form-heading { align-items: start; }
    .step-label { margin-top: 8px; }
    .stepper { margin: 30px 0 42px; }
    .stepper em { display: none; }
    .stepper li::after { right: 6px; }
    .field-grid, .review-grid, .participation-options { grid-template-columns: 1fr; }
    .field-wide { grid-column: auto; }
    .form-actions { justify-content: stretch; }
    .form-actions .button { flex: 1; padding-inline: 12px; }
    #submit-button { font-size: 10px; letter-spacing: .1em; }
}

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