:root {
  --ink: #123f37;
  --muted: #46615b;
  --paper: #ffffff;
  --soft: #f4f6f2;
  --line: #dce4df;
  --orange: #d4561e;
  --violet: #6d5de8;
  --shadow: 0 18px 55px rgba(18, 63, 55, .12);
  --content: 1240px;
}

* { box-sizing: border-box; }
html { color-scheme: light; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
body.viewer-open { overflow: hidden; }
img { display: block; max-width: 100%; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 4px solid #1769e0; outline-offset: 4px; }

.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 10px 14px; color: #fff; background: var(--ink); transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header { width: min(var(--content), calc(100% - 48px)); min-height: 74px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.site-header img { width: 205px; height: 54px; object-fit: contain; object-position: left center; }
.site-header span { color: var(--muted); font-size: .88rem; font-weight: 750; }

main { width: min(var(--content), calc(100% - 48px)); margin: auto; }
.intro { max-width: 940px; padding: clamp(54px, 8vh, 90px) 0 44px; }
h1, h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-weight: 500; line-height: 1.08; letter-spacing: -.035em; }
h1 { max-width: 100%; font-size: clamp(2.7rem, 5vw, 4.6rem); text-wrap: balance; }
.intro > p { max-width: 920px; margin: 22px 0 0; color: var(--muted); font-size: clamp(1.05rem, 1.45vw, 1.22rem); }
.intro .demo-note { margin-top: 14px; font-size: 1rem; }
.demo-note strong { color: var(--ink); }

.variants { padding: 10px 0 72px; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.variant-card { overflow: hidden; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow); }
.preview-button { width: 100%; aspect-ratio: 16 / 9; padding: 0; overflow: hidden; border: 0; border-bottom: 1px solid var(--line); background: var(--soft); cursor: zoom-in; }
.preview-button img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .35s ease; }
.preview-button:hover img { transform: scale(1.018); }
.variant-copy { padding: 28px 30px 20px; display: flex; align-items: flex-start; gap: 18px; }
.variant-letter, .viewer-letter { width: 48px; height: 48px; flex: 0 0 auto; display: grid; place-items: center; color: #fff; border-radius: 50%; background: var(--ink); font-weight: 850; }
.variant-a .variant-letter { background: var(--violet); }
.variant-copy h2 { margin-bottom: 8px; font-size: clamp(1.7rem, 2.4vw, 2.25rem); }
.variant-copy p { margin: 0; color: var(--muted); }
.view-button { min-height: 56px; margin: auto 30px 30px; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; color: #fff; border: 0; border-radius: 10px; background: var(--ink); cursor: pointer; font-weight: 850; }
.variant-a .view-button { background: #25204d; }
.view-button span { font-size: 1.35rem; }

footer { padding: 24px; color: var(--muted); border-top: 1px solid var(--line); text-align: center; font-size: .86rem; }
footer p { margin: 0; }

.viewer { width: 100vw; max-width: none; height: 100dvh; max-height: none; margin: 0; padding: 0; overflow: hidden; color: var(--ink); border: 0; background: #fff; }
.viewer::backdrop { background: rgba(5, 20, 17, .78); }
.viewer[open] { display: block; }
.viewer-shell { height: 100%; display: grid; grid-template-rows: auto 1fr; }
.viewer-toolbar { position: relative; z-index: 5; min-height: 78px; padding: 12px clamp(16px, 3vw, 42px); display: grid; grid-template-columns: minmax(210px, 1fr) auto minmax(130px, 1fr); align-items: center; gap: 24px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.96); box-shadow: 0 8px 25px rgba(18,63,55,.08); }
.viewer-heading { display: flex; align-items: center; gap: 12px; }
.viewer-heading > div > span { color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.viewer-heading h2 { font-size: 1.35rem; letter-spacing: -.02em; }
.viewer-letter { width: 42px; height: 42px; background: var(--violet); }
.viewer[data-variant="b"] .viewer-letter { background: var(--ink); }
.device-switch { padding: 4px; display: flex; gap: 5px; border: 1px solid #f0c8b6; border-radius: 12px; background: #fff7f2; }
.device-switch button { min-height: 44px; padding: 9px 15px; color: #a43c11; border: 0; border-radius: 8px; background: transparent; cursor: pointer; font-size: .88rem; font-weight: 850; }
.device-switch button[aria-pressed="true"] { color: #fff; background: var(--orange); box-shadow: 0 5px 15px rgba(212,86,30,.22); }
.close-viewer { justify-self: end; min-height: 44px; padding: 8px 13px; display: inline-flex; align-items: center; gap: 7px; color: var(--ink); border: 1px solid var(--line); border-radius: 9px; background: #fff; cursor: pointer; font-weight: 800; }
.close-viewer span:first-child { font-size: 1.55rem; line-height: 1; }
.viewer-content { overflow: auto; overscroll-behavior: contain; background: var(--soft); }
.viewer-status { margin: 0; padding: 12px 20px; color: var(--muted); background: #fff; text-align: center; font-size: .82rem; font-weight: 750; }
.mockup-stream { width: min(1460px, calc(100% - 32px)); margin: 18px auto 70px; overflow: hidden; border-radius: 12px; background: #fff; box-shadow: var(--shadow); }
.mockup-stream img { width: 100%; height: auto; }
.mockup-stream.mobile { width: min(520px, calc(100% - 28px)); }

@media (max-width: 820px) {
  .site-header { width: min(100% - 32px, var(--content)); min-height: 64px; }
  .site-header img { width: 175px; height: 48px; }
  .site-header span { display: none; }
  main { width: min(100% - 32px, var(--content)); }
  .intro { padding: 42px 0 30px; }
  h1 { max-width: 520px; font-size: clamp(2.45rem, 11vw, 3.7rem); }
  .intro > p { margin-top: 17px; font-size: 1rem; }
  .intro .demo-note { font-size: .94rem; }
  .variants { grid-template-columns: 1fr; gap: 18px; padding-bottom: 48px; }
  .variant-copy { padding: 22px 22px 16px; }
  .view-button { margin: auto 22px 22px; }
  .viewer-toolbar { padding: 10px 12px; grid-template-columns: 1fr auto; gap: 10px; }
  .viewer-heading { min-width: 0; }
  .viewer-heading > div > span { display: none; }
  .viewer-heading h2 { max-width: 150px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 1rem; }
  .viewer-letter { width: 38px; height: 38px; }
  .device-switch { grid-column: 1 / -1; grid-row: 2; display: grid; grid-template-columns: 1fr 1fr; }
  .device-switch button { padding-inline: 8px; font-size: .78rem; }
  .close-viewer span:last-child { display: none; }
  .viewer-status { padding: 9px 12px; }
  .mockup-stream { margin-top: 10px; }
}

@media (max-width: 430px) {
  .site-header img { width: 158px; }
  h1 { font-size: 2.55rem; }
  .preview-button { aspect-ratio: 4 / 3; }
  .variant-copy { gap: 13px; }
  .variant-letter { width: 42px; height: 42px; }
  .variant-copy h2 { font-size: 1.65rem; }
  .variant-copy p { font-size: .94rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}