:root {
  color-scheme: light;
  --background: #f3f5fb;
  --surface: #fff;
  --text: #18243b;
  --muted: #65718a;
  --accent: #365de8;
  --accent-dark: #2646bb;
  --soft: #edf2fc;
  --border: #e1e7f2;
  font-family: "Segoe UI Variable Text", "Segoe UI", Arial, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; min-height: 100svh; background: var(--background); color: var(--text); }
.background { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: radial-gradient(ellipse at 9% 18%, #e4eaff 0, transparent 47%), radial-gradient(ellipse at 94% 79%, #e5ebfa 0, transparent 43%), linear-gradient(155deg, #f3f5fb, #f8faff); }
.background::before { content: ""; position: absolute; inset: -15%; background-image: linear-gradient(#365de808 1px, transparent 1px), linear-gradient(90deg, #365de808 1px, transparent 1px); background-size: 90px 90px; transform: rotate(-5deg); }
.geometry { position: absolute; width: 100%; height: 100%; }
.fine-lines { stroke: #365de8; stroke-width: 1; opacity: .12; }
.blue-shapes { stroke: #365de8; stroke-width: 1.5; opacity: .19; }
.soft-shapes { stroke: #7188cf; stroke-width: 1.4; opacity: .21; }
.beams { stroke: #365de8; stroke-width: 2; opacity: .19; }
.dots { fill: #365de8; opacity: .5; }
.dots circle:nth-child(3n) { fill: #8b9dd7; }
.filled-triangle { fill: #365de8; opacity: .055; }
.site-header { position: absolute; top: 28px; left: 40px; z-index: 1; }
.brand { display: inline-flex; align-items: center; gap: 17px; color: var(--text); text-decoration: none; border-radius: 16px; }
.brand-mark { width: 56px; height: 56px; flex-shrink: 0; box-shadow: 0 5px 16px #365de819; }
.brand-copy { font-size: 32px; font-weight: 650; line-height: 1.1; letter-spacing: -1.2px; }
.brand-copy > span { display: block; margin-top: 5px; font-size: 17px; font-weight: 400; letter-spacing: 3px; text-transform: uppercase; color: var(--muted); }
main { min-height: 100vh; min-height: 100svh; display: grid; grid-template-columns: minmax(0, 1fr); place-items: center; padding: 120px 24px 48px; }
.notice { width: 400px; max-width: 100%; padding: 46px 39px 29px; border: 1px solid #e1e7f2; border-radius: 31px; background: var(--surface); text-align: center; box-shadow: 0 24px 80px #243d7210, 0 3px 12px #243d7204; }
h1 { margin: 0 0 15px; color: var(--accent); font-size: 60px; font-weight: 650; letter-spacing: -2.5px; line-height: 1.2; }
.phone-icon { width: 80px; height: 80px; border-radius: 22px; display: grid; place-items: center; margin: 0 auto 21px; background: linear-gradient(145deg, #f0f4fd, #e6ecfa); color: var(--accent); }
.phone-icon svg { width: 32px; height: 48px; }
h2 { margin: 0; font-size: 26px; line-height: 1.4; font-weight: 600; letter-spacing: -.7px; }
.instruction { margin: 17px 0 28px; font-size: 21px; line-height: 1.55; color: var(--accent); letter-spacing: -.25px; }
.device-help { padding-top: 22px; border-top: 1px solid var(--border); }
button { font: inherit; cursor: pointer; padding: 8px 17px; border-radius: 11px; border: 1px solid #c7d5f8; background: #edf2ff; color: var(--accent-dark); font-size: 14px; line-height: 1.4; transition: background .18s, border-color .18s; }
button:hover { background: #e1e9fd; border-color: #9cb1ef; }
button:active { background: #d8e3ff; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.iphone-note { margin: 13px 0 0; border-radius: 16px; padding: 17px 20px; background: var(--soft); color: #52617e; font-size: 15px; line-height: 1.65; }
[hidden] { display: none !important; }
@media (min-width: 1600px) { main { padding-top: 150px; } }
@media (max-width: 600px) {
  .site-header { top: 24px; left: 24px; }
  .brand { gap: 12px; }
  .brand-mark { width: 46px; height: 46px; }
  .brand-copy { font-size: 27px; }
  .brand-copy > span { font-size: 11px; letter-spacing: 2.1px; margin-top: 4px; }
  main { padding: 108px 20px 28px; }
  .notice { padding: 32px 25px 24px; border-radius: 26px; }
  h1 { font-size: 52px; }
  h2 { font-size: 23px; }
  .instruction { font-size: 18px; margin-bottom: 25px; }
  .phone-icon { width: 72px; height: 72px; margin-bottom: 20px; }
  .iphone-note { padding: 16px; font-size: 14px; }
}
@media (max-width: 350px) {
  main { padding-inline: 14px; }
  .notice { padding-inline: 18px; }
  h2 { font-size: 21px; }
  .instruction { font-size: 17px; }
}