:root {
    color-scheme: light;
    --blue: #2454f5;
    --ice: #f1f6ff;
    --ink: #132344;
    --white: #fff;
    --slate: #596b87;
    --line: #ccd9f0;
    --font-display: "Arial Black", "Segoe UI", sans-serif;
    --font-body: "Segoe UI", Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--white); color: var(--ink); font: 16px/1.65 var(--font-body); -webkit-font-smoothing: antialiased; }
h1, h2, h3, p { margin: 0; }
a { color: var(--blue); text-underline-offset: 4px; }
a, button { touch-action: manipulation; }
button { font: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
[hidden] { display: none !important; }
.container { width: min(1080px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 2; padding: 12px 18px; background: var(--white); }
.skip-link:focus { top: 12px; }
.site-header { border-bottom: 1px solid var(--line); }
.navbar { min-height: 96px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; }
.wordmark { display: inline-flex; align-items: center; min-height: 44px; color: var(--ink); font-size: 24px; font-weight: 800; letter-spacing: -.05em; text-decoration: none; white-space: nowrap; }
.nav-links, .account-links, .download-links, .footer-links { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; }
.nav-links > a, .account-links > a, .footer-links > a { display: inline-flex; align-items: center; min-height: 44px; gap: 12px; }
.nav-links > a { font-size: 14px; text-decoration: none; }
.nav-links > a:hover, .account-links > a:hover { text-decoration: underline; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; max-width: 100%; padding: 12px 20px; border: 1px solid transparent; border-radius: 12px; background: var(--blue); color: var(--white); font-size: 15px; font-weight: 650; line-height: 1.4; text-align: center; text-decoration: none; }
.button:hover { background: #1743d9; }
.button.secondary { border-color: var(--line); background: var(--ice); color: var(--blue); }
.button.secondary:hover { background: #dce7ff; }
.button span { flex-shrink: 0; }
.hero-instruction { padding-block: clamp(36px, 6vw, 72px) 44px; }
.eyebrow { color: var(--blue); font-size: 11px; font-weight: 750; letter-spacing: .16em; text-transform: uppercase; }
h1 { margin-block: 20px 24px; font-family: var(--font-display); font-size: clamp(34px, 5vw, 60px); font-weight: 900; line-height: 1.1; letter-spacing: -.055em; }
h1 span { color: var(--blue); }
.hero-description { max-width: 640px; color: var(--slate); font-size: 18px; }
.account-links { margin-top: 16px; font-size: 14px; font-weight: 650; }
.setup-steps { padding-bottom: 64px; }
.setup-step { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 24px; padding-block: 32px; border-top: 1px solid var(--line); }
.step-number { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--blue); color: var(--white); font-size: 18px; font-weight: 700; }
.step-body { min-width: 0; }
h2 { margin-block: 4px 12px; font-size: clamp(23px, 3vw, 28px); line-height: 1.25; letter-spacing: -.035em; }
.step-body > p { max-width: 720px; margin-bottom: 20px; color: var(--slate); }
.device-buttons { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 6px; margin-bottom: 18px; padding: 6px; border: 1px solid var(--line); border-radius: 16px; background: var(--ice); }
.device-btn { min-height: 48px; padding: 10px 8px; border: 1px solid transparent; border-radius: 10px; background: transparent; color: var(--ink); font-size: 14px; font-weight: 650; }
.device-btn:hover { border-color: var(--blue); }
.device-btn[aria-selected="true"] { background: var(--blue); color: var(--white); }
.device-btn:focus-visible { outline-offset: 1px; }
.instruction-content { padding: 24px; border: 1px solid var(--line); border-radius: 16px; }
.instruction-content + .instruction-content { margin-top: 18px; }
.device-buttons:not([hidden]) ~ .instruction-content { margin-top: 0; }
h3 { margin-bottom: 10px; font-size: 20px; line-height: 1.35; letter-spacing: -.025em; }
.instruction-content > p { max-width: 660px; color: var(--slate); }
.download-links { gap: 12px; margin-top: 20px; }
.step-body > .download-note { margin-block: 14px 0; font-size: 13px; }
.note { padding: 16px; border-radius: 12px; background: var(--ice); }
.help-step { margin-top: 8px; padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: var(--ice); }
.help-step .button { background: var(--white); }
.help-step .button:hover { background: #dce7ff; }
footer { border-top: 1px solid var(--line); padding-block: 24px; color: var(--slate); font-size: 13px; }
.footer-bottom-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; }
.footer-links { gap: 8px 24px; }
@media (max-width: 640px) {
    .container { width: calc(100% - 32px); }
    .navbar { min-height: 80px; flex-wrap: wrap; gap: 8px 16px; }
    .nav-links { gap: 16px; }
    .hero-instruction { padding-bottom: 32px; }
    .hero-description { font-size: 16px; }
    .account-links { gap: 4px 20px; }
    .setup-step { grid-template-columns: 32px minmax(0, 1fr); gap: 12px; padding-block: 24px; }
    .step-number { width: 32px; height: 32px; font-size: 15px; }
    h2 { margin-top: 0; }
    .device-buttons { display: flex; flex-wrap: wrap; }
    .device-btn { flex: 1 1 90px; }
    .instruction-content { padding: 18px; }
    .download-links { align-items: stretch; flex-direction: column; }
    .help-step { grid-template-columns: 32px minmax(0, 1fr); padding: 18px 14px; }
    .setup-steps { padding-bottom: 40px; }
}
@media (max-width: 380px) {
    .setup-step { grid-template-columns: minmax(0, 1fr); }
    .hero-instruction h1 { font-size: 32px; }
}