:root {
    color-scheme: dark;
    --bg: #1a1a1a;
    --surface: #242424;
    --surface-raised: #2d2d2d;
    --text: #f7f7f8;
    --muted: #b2b5bc;
    --border: #3c3e43;
    --accent: #8bbaff;
    --button: #2563eb;
    --tint: #213047;
}
:root.light-theme {
    color-scheme: light;
    --bg: #f8f9fc;
    --surface: #fff;
    --surface-raised: #edf1f7;
    --text: #192334;
    --muted: #546174;
    --border: #d8dfe9;
    --accent: #245dc6;
    --tint: #eaf1ff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; background: var(--bg); }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; }
[hidden] { display: none !important; }
a { color: var(--accent); text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
button, input { font: inherit; }
button, summary { cursor: pointer; }
button, a, summary, input { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.wrap { width: min(1080px, 100% - 48px); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 25px; border-bottom: 1px solid var(--border); }
.brand { display: flex; gap: 11px; align-items: center; color: var(--text); text-decoration: none; font-size: 14px; line-height: 1.35; }
.brand strong { display: block; }
.brand img { border-radius: 10px; }
.back-link { font-size: 14px; text-decoration: none; padding-block: 10px; }
.hero { display: grid; grid-template-columns: 1.45fr 1fr; align-items: center; gap: 52px; padding-block: 68px; }
.eyebrow { color: var(--accent); font-size: 11px; letter-spacing: .12em; font-weight: 750; }
h1, h2, h3, p { margin: 0; }
h1 { font-size: clamp(38px, 5vw, 60px); line-height: 1.12; letter-spacing: -.055em; margin: 18px 0 24px; }
h1 span { color: var(--accent); }
h2 { font-size: clamp(25px, 3vw, 32px); line-height: 1.23; letter-spacing: -.035em; }
h3 { font-size: 18px; line-height: 1.4; margin-bottom: 7px; }
p + p { margin-top: 12px; }
.lead { font-size: 18px; color: var(--muted); max-width: 510px; }
.benefits { display: flex; gap: 10px 20px; flex-wrap: wrap; list-style: none; padding: 0; margin: 23px 0 28px; font-size: 13px; }
.benefits li::before { content: '✓'; color: var(--accent); margin-right: 7px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 15px; border: 1px solid transparent; border-radius: 12px; padding: 13px 20px; min-height: 50px; font-weight: 650; text-decoration: none; line-height: 1.4; text-align: center; }
.primary { background: var(--button); color: #fff; }
.primary:hover { background: #1d4ed8; }
.secondary { background: var(--surface-raised); color: var(--text); border-color: var(--border); }
.button:disabled { opacity: .65; cursor: wait; }
.status { font-size: 13px; color: var(--muted); margin-top: 15px; max-width: 500px; }
.preview { text-align: center; padding: 22px; background: radial-gradient(ellipse, var(--tint), transparent 70%); }
.phone { position: relative; width: 218px; height: 348px; margin: 0 auto; border: 6px solid #454b55; border-radius: 34px; background: linear-gradient(145deg, #1b2c4c, #28426d 50%, #3d2f5c); color: #fff; box-shadow: 0 18px 42px #0003; overflow: hidden; }
.phone-top { display: flex; justify-content: space-between; padding: 13px 19px; font-size: 10px; font-weight: 700; }
.phone-date { font-size: 11px; margin-top: 8px; color: #d7e5ff; }
.phone-clock { font-size: 42px; font-weight: 600; letter-spacing: -.06em; line-height: 1.2; }
.phone-app { display: flex; flex-direction: column; align-items: center; gap: 5px; margin: 20px 0 0 23px; width: 72px; font-size: 12px; }
.phone-app img { border-radius: 18px; box-shadow: 0 0 0 6px #ffffff12; }
.phone-hint { position: absolute; right: 17px; top: 230px; color: #d7e5ff; font-size: 12px; transform: rotate(-6deg); }
.phone-hint span { display: inline-block; transform: rotate(-95deg); font-size: 24px; }
.phone-dock { position: absolute; display: flex; justify-content: space-evenly; bottom: 16px; left: 14px; right: 14px; background: #ffffff14; border-radius: 18px; padding: 8px; }
.phone-dock span { display: grid; place-items: center; border-radius: 10px; width: 31px; height: 31px; background: #ffffff1f; }
.preview-caption { margin-top: 20px; color: var(--muted); font-size: 11px; }
.section { border-top: 1px solid var(--border); padding-block: 42px; }
.section-heading { margin-bottom: 24px; max-width: 780px; }
.section-heading h2 { margin: 9px 0 13px; }
.section-heading p, .muted { color: var(--muted); }
.device-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.device-card { display: flex; flex-direction: column; padding: 20px 17px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; color: var(--text); text-decoration: none; }
.device-card:hover, .device-card.recommended { border-color: var(--accent); background: var(--tint); }
.device-symbol { font-size: 26px; color: var(--accent); margin-bottom: 13px; line-height: 1.2; }
.device-card strong { font-size: 16px; }
.device-card > span:last-child { font-size: 12px; color: var(--muted); margin-top: 5px; }
.muted { font-size: 14px; }
.steps { list-style: none; margin: 0 0 24px; padding: 0; counter-reset: step; }
.steps > li { display: flex; gap: 18px; counter-increment: step; padding-block: 19px; border-bottom: 1px solid var(--border); }
.steps > li:first-child { padding-top: 0; }
.steps > li:last-child { border-bottom: 0; padding-bottom: 0; }
.steps > li::before { content: counter(step, decimal-leading-zero); display: grid; place-items: center; flex: 0 0 40px; height: 40px; font-size: 14px; font-weight: 750; color: var(--accent); background: var(--tint); border-radius: 12px; }
.steps p, .detail-body, .finish-grid p, .closing p { color: var(--muted); }
.detail-body h3 { color: var(--text); }
.steps b, .detail-body b { color: var(--text); }
.share-icon { position: relative; display: inline-flex; justify-content: center; width: 21px; height: 22px; border: 2px solid var(--accent); border-top: 0; margin: 0 6px; color: var(--accent); font-size: 27px; line-height: 10px; vertical-align: -3px; }
.guide { background: var(--surface); border: 1px solid var(--border); border-radius: 15px; margin-top: 12px; }
.guide > summary { position: relative; padding: 19px 52px 19px 22px; font-weight: 650; line-height: 1.5; list-style: none; }
.guide > summary::-webkit-details-marker { display: none; }
.guide > summary::after { content: '+'; position: absolute; right: 22px; top: 15px; font-size: 24px; font-weight: 400; color: var(--accent); }
.guide[open] > summary::after { content: '−'; }
.guide[open] > summary { border-bottom: 1px solid var(--border); }
.summary-note { font-size: 12px; font-weight: 400; color: var(--muted); margin-left: 10px; }
.detail-body { padding: 24px; }
.compact h3 { font-size: 17px; }
.simple-steps { margin: 0; padding-left: 24px; }
.simple-steps li { padding-left: 5px; margin-bottom: 14px; }
.simple-steps li::marker { color: var(--accent); font-weight: 700; }
.tip, .notice { padding: 19px 22px; background: var(--tint); border-radius: 14px; border-left: 3px solid var(--accent); }
.tip { font-size: 14px; color: var(--muted); }
.notice { margin-bottom: 32px; }
.notice p { margin: 8px 0; }
.address-card { padding: 28px; background: var(--tint); border: 1px solid var(--border); border-radius: 18px; margin-bottom: 42px; }
.address-card h2 { font-size: 23px; margin-bottom: 10px; }
.address-card > p { color: var(--muted); }
.copy-row { display: flex; gap: 10px; margin: 20px 0 12px; }
.copy-row input { min-width: 0; flex: 1; padding: 13px 16px; background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 12px; font-size: 16px; }
.finish-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.finish-grid p { font-size: 14px; }
.small-number { display: block; font-size: 12px; color: var(--accent); margin-bottom: 12px; }
.closing { display: flex; align-items: center; gap: 18px; background: var(--surface); border-radius: 18px; padding: 26px; margin-bottom: 45px; }
.closing img { border-radius: 12px; }
.closing h2 { font-size: 21px; }
.closing p { font-size: 13px; margin-top: 6px; }
.closing .button { margin-left: auto; flex-shrink: 0; font-size: 14px; }
footer { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; border-top: 1px solid var(--border); padding-block: 24px max(24px, env(safe-area-inset-bottom)); color: var(--muted); font-size: 12px; }
footer details { max-width: 540px; }
footer details p { padding-top: 12px; }
.sr-only, .skip-link:not(:focus) { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link:focus { position: fixed; top: 12px; left: 12px; z-index: 10; background: var(--surface); padding: 12px; border-radius: 8px; }
@media (max-width: 760px) {
    .hero { gap: 15px; grid-template-columns: 1fr; padding-block: 38px; }
    .hero-copy { max-width: 580px; }
    .preview { display: none; }
    .device-grid { grid-template-columns: repeat(2, 1fr); }
    .section { padding-block: 32px; }
    .finish-grid { grid-template-columns: 1fr; gap: 22px; }
    .finish-grid article { border-left: 2px solid var(--border); padding-left: 18px; }
    .small-number { margin-bottom: 5px; }
    .closing { flex-wrap: wrap; }
    .closing > div { flex: 1; min-width: 170px; }
    .closing .button { margin-left: 0; width: 100%; }
    footer { flex-direction: column; gap: 12px; }
}
@media (max-width: 480px) {
    .wrap { width: calc(100% - 32px); }
    .site-header { gap: 12px; padding-block: 18px; }
    .back-link { font-size: 12px; }
    h1 { font-size: 38px; }
    .lead { font-size: 16px; }
    .eyebrow { font-size: 10px; letter-spacing: .08em; }
    .hero-actions .button { width: 100%; }
    .device-card { padding: 16px 12px; }
    .device-card strong { font-size: 14px; }
    .steps > li { gap: 12px; }
    .steps > li::before { flex-basis: 30px; height: 32px; border-radius: 9px; font-size: 12px; }
    .steps h3 { font-size: 16px; }
    .steps p, .detail-body { font-size: 15px; }
    .guide > summary { padding: 17px 42px 17px 16px; font-size: 15px; }
    .guide > summary::after { right: 16px; top: 12px; }
    .summary-note { display: block; margin: 5px 0 0; }
    .detail-body { padding: 18px 16px; }
    .address-card { padding: 20px; }
    .copy-row { flex-direction: column; }
    .tip { padding: 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }