:root {
  color-scheme: light;
  --canvas: #fafaf8;
  --paper: #ffffff;
  --ink: #111418;
  --muted: #5f6975;
  --line: #e4e6e9;
  --blue: #0b6fe6;
  --serif: "Iowan Old Style", "Palatino", "Georgia", "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--canvas); color: var(--ink); font: 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; height: auto; }
a { color: var(--blue); text-decoration: none; text-underline-offset: 4px; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; border-radius: 4px; }
.skip { position: absolute; left: 20px; top: -100px; background: var(--paper); padding: 12px; }
.skip:focus { top: 12px; }
.wrap { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }

.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 22px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font: 600 19px/1 var(--sans); letter-spacing: -0.2px; }
.brand img { width: 36px; height: 36px; border-radius: 9px; }
.site-header nav { display: flex; align-items: center; gap: 28px; }
.site-header nav a { color: var(--ink); font-size: 15px; }
.quiet-pill { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 0 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--paper); font-size: 14px; color: var(--ink); }
.quiet-pill:hover { border-color: #c9ced6; text-decoration: none; }

.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 56px; align-items: center; padding: 48px 0 72px; }
.hero h1 { font: 400 clamp(44px, 6vw, 76px)/1.04 var(--serif); letter-spacing: -0.03em; margin: 0 0 22px; }
.hero .lead { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.5; color: var(--muted); max-width: 32ch; margin: 0 0 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 24px; align-items: center; }
.text-action { display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; color: var(--blue); }
.hero-note { margin: 24px 0 0; font-size: 13px; color: var(--muted); }

.device { position: relative; width: min(100%, 332px); margin-inline: auto; border: 1px solid #d9dde3; border-radius: 44px; padding: 10px; background: var(--paper); }
.device img { border-radius: 36px; }
.device.small { width: min(100%, 292px); border-radius: 40px; }
.device.small img { border-radius: 32px; }

.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }

.film { padding: 64px 0; }
.film video { display: block; width: 100%; max-width: 1120px; margin: 28px auto 0; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.steps { padding: 72px 0 24px; }
.section-head h2 { font: 400 clamp(32px, 4vw, 46px)/1.12 var(--serif); letter-spacing: -0.02em; margin: 0 0 10px; }
.section-head p { color: var(--muted); margin: 0; max-width: 60ch; font-size: 18px; }
.step { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; padding: 56px 0; border-top: 1px solid var(--line); margin-top: 48px; }
.step:first-of-type { margin-top: 40px; }
.step.flip .step-copy { order: 2; }
.step-copy .number { display: inline-flex; align-items: center; gap: 12px; font-size: 13px; letter-spacing: 0.12em; color: var(--muted); }
.step-copy .number::after { content: ""; width: 40px; height: 1px; background: var(--line); }
.step-copy h3 { font: 400 clamp(28px, 3vw, 36px)/1.15 var(--serif); letter-spacing: -0.02em; margin: 14px 0 12px; }
.step-copy p { color: var(--muted); margin: 0 0 14px; max-width: 46ch; }
.step-copy .detail { font-size: 14px; color: var(--muted); }

.passage { padding: 72px 0; }
.passage blockquote { margin: 0; max-width: 30ch; font: 400 clamp(28px, 3.6vw, 44px)/1.25 var(--serif); letter-spacing: -0.015em; }
.passage figcaption { margin-top: 20px; color: var(--muted); font-size: 15px; }
.passage .why { display: inline-block; margin-top: 18px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); font-size: 14px; color: var(--ink); }
.passage .why span { color: var(--muted); }

.principles { padding: 24px 0 72px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
.principles h3 { font: 600 17px/1.3 var(--sans); margin: 0 0 8px; }
.principles p { margin: 0; color: var(--muted); font-size: 15px; }

.help { padding: 24px 0 72px; }
.help h2 { font: 400 clamp(28px, 3vw, 36px)/1.15 var(--serif); letter-spacing: -0.02em; margin: 0 0 20px; }
.faq { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 48px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; min-height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 16px; font-weight: 600; font-size: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--blue); font-size: 22px; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin: 0 0 18px; color: var(--muted); max-width: 48ch; }
.faq a { display: inline-block; margin-bottom: 18px; }

.site-footer { border-top: 1px solid var(--line); padding: 28px 0 40px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 32px; font-size: 14px; color: var(--muted); }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 22px; }
.site-footer nav a { color: var(--ink); }

dialog { border: 1px solid var(--line); border-radius: 16px; padding: 32px; max-width: 420px; background: var(--paper); color: var(--ink); }
dialog::backdrop { background: #11141866; }
dialog h2 { font: 400 28px/1.2 var(--serif); margin: 0 0 12px; }
dialog p { color: var(--muted); margin: 0 0 20px; }
.close-dialog { position: absolute; top: 12px; right: 16px; width: 44px; height: 44px; font-size: 24px; color: var(--muted); }
dialog .primary { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: 10px; background: var(--blue); color: #fff; font-weight: 600; }
.operator { margin-top: 20px; font-size: 14px; color: var(--muted); }
.viewer { max-width: 400px; padding: 16px; }
.viewer img { border-radius: 28px; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 36px; padding: 24px 0 56px; }
  .hero h1 { font-size: clamp(38px, 10vw, 56px); }
  .step, .step.flip { grid-template-columns: 1fr; gap: 28px; padding: 40px 0; }
  .step.flip .step-copy { order: 0; }
  .principles { grid-template-columns: 1fr; gap: 24px; }
  .faq { grid-template-columns: 1fr; }
  .site-header nav a:not(.quiet-pill) { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }