:root {
  color-scheme: light;
  font-family: var(--stili-font-ui);
  font-weight: 400;
  color: var(--stili-ink);
  background: var(--stili-base);
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
body { margin: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; cursor: pointer; }
button:disabled { cursor: default; }
a { color: var(--stili-action); }
button:focus-visible, a:focus-visible { outline: 3px solid var(--stili-focus); outline-offset: 4px; }
button, img { -webkit-user-select: none; user-select: none; }
[hidden] { display: none !important; }
.app-shell { max-width: 1120px; margin: 0 auto; padding: max(20px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left)); }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin: 0 0 26px; }
.wordmark { display: inline-flex; align-items: center; flex-shrink: 0; padding: 8px; margin: -8px; text-decoration: none; }
.header-nav { font-size: 13px; color: var(--stili-muted); text-align: right; }
.text-button { display: inline-block; color: var(--stili-action); font-weight: 500; background: none; border: 0; padding: 10px 0 10px 10px; min-height: 44px; text-decoration: none; line-height: 1.3; }
main:focus { outline: none; }
h1, h2, p { margin: 0; }
h1 { font-size: clamp(28px, 5.7vw, 38px); line-height: 1.12; letter-spacing: -.035em; font-weight: 400; }
.intro { font-size: 17px; line-height: 1.35; color: var(--stili-muted); margin-top: 9px; max-width: 620px; }
.mode-heading { font-size: 18px; line-height: 1.3; font-weight: 600; letter-spacing: -.025em; margin: 22px 0 12px; }
.mode-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.mode-card { display: block; width: 100%; text-align: left; border: 1px solid var(--stili-line); border-radius: var(--stili-radius-control); background: var(--stili-on-action); padding: 15px 14px 13px; color: var(--stili-ink); transition: border-color .15s ease, background-color .15s ease; }
.mode-card:not(:disabled):hover { border-color: var(--stili-action); background: var(--stili-base); }
.mode-card:disabled { color: var(--stili-muted); border-color: var(--stili-line); cursor: default; }
.mode-card-title { font-size: 20px; line-height: 1.16; font-weight: 600; letter-spacing: -.028em; }
.mode-card-subtitle { color: var(--stili-muted); margin-top: 6px; font-size: 15px; line-height: 1.3; }
.mode-thumbnails { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-top: 11px; }
.mode-thumbnails img { width: 100%; height: auto; aspect-ratio: .75; max-height: 245px; object-fit: contain; display: block; border-radius: var(--stili-radius-control); background: var(--stili-base); }
.registration-note { text-align: center; font-size: 12px; line-height: 1.5; color: var(--stili-muted); margin: 10px 0 0; }
.mode-meta { display: flex; justify-content: space-between; gap: 12px; color: var(--stili-muted); font-size: 12px; line-height: 1.4; margin-bottom: 20px; }
.comparison-count { white-space: nowrap; }
.comparison-heading { max-width: 760px; }
.comparison-instruction { font-size: 17px; line-height: 1.35; color: var(--stili-muted); margin-top: 10px; }
.comparison-sidebar { min-width: 0; overflow-wrap: anywhere; }
.comparison-sidebar .site-header { flex-wrap: wrap; }
.comparison-sidebar .header-nav, .comparison-sidebar .preview-actions > * { min-width: 0; max-width: 100%; }
.comparison-sidebar .text-button, .comparison-sidebar .preview-actions button, .comparison-sidebar .retry-button { max-width: 100%; white-space: normal; overflow-wrap: anywhere; }
.comparison-sidebar .comparison-count { white-space: normal; }
.comparison-sidebar .status-area { margin-bottom: 12px; }
.pair { margin: 19px -12px 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 7px; touch-action: pan-y pinch-zoom; }
.candidate { position: relative; border: 0; padding: 0; border-radius: var(--stili-radius-control); overflow: hidden; min-width: 0; width: 100%; background: var(--stili-base); color: var(--stili-ink); touch-action: pan-y pinch-zoom; transition: box-shadow .15s ease, opacity .15s ease; }
.candidate img { width: 100%; height: auto; aspect-ratio: var(--image-ratio, .75); max-height: min(59svh, 560px); display: block; object-fit: contain; opacity: 0; -webkit-touch-callout: none; pointer-events: none; }
.pair.is-ready .candidate img { opacity: 1; }
.pair.is-loading .candidate { aspect-ratio: .75; }
.candidate.is-selected { box-shadow: inset 0 0 0 3px var(--stili-brand); }
.pair.is-ready .candidate.is-selected img { opacity: .94; }
.candidate.is-selected::after { content: ""; position: absolute; inset: 0; border: 3px solid var(--stili-brand); border-radius: inherit; pointer-events: none; }
.candidate:focus-visible { outline-offset: 3px; z-index: 1; }
.status-area { min-height: 36px; margin-top: 14px; font-size: 14px; line-height: 1.5; color: var(--stili-muted); }
.status-area.is-error { color: var(--stili-error); }
.retry-button { display: inline-block; background: var(--stili-action); border: 1px solid var(--stili-action); border-radius: var(--stili-radius-control); color: var(--stili-on-action); font-weight: 500; padding: 10px 15px; min-height: 44px; margin-top: 10px; }
.retry-button:not(:disabled):hover { background: var(--stili-action-hover); border-color: var(--stili-action-hover); }
.retry-button:disabled { background: var(--stili-line); border-color: var(--stili-line); color: var(--stili-muted); }
.text-button:not(:disabled):hover, .preview-actions button:hover { text-decoration: underline; text-underline-offset: .2em; }
.message-screen { margin: 45px auto 0; max-width: 660px; }
.message-screen p { color: var(--stili-muted); font-size: 18px; line-height: 1.45; margin-top: 15px; }
.message-screen .text-button { margin-top: 18px; padding-left: 0; }
.preview-note { font-size: 12px; line-height: 1.5; padding: 8px 10px; background: var(--stili-on-action); color: var(--stili-muted); border: 1px solid var(--stili-line); border-radius: var(--stili-radius-control); margin-bottom: 18px; }
.preview-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 16px; margin-top: 2px; }
.preview-actions form { margin: 0; }
.preview-actions button { border: 0; background: none; color: var(--stili-action); font-weight: 500; padding: 8px 0; min-height: 36px; text-decoration: underline; }
.noscript-note { padding: 20px 0; line-height: 1.5; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (min-width: 700px) {
  .app-shell { padding-top: 30px; padding-left: 40px; padding-right: 40px; }
  .site-header { margin-bottom: 40px; }
  .header-nav { font-size: 15px; }
  .intro { font-size: 20px; }
  .mode-heading { font-size: 22px; margin-top: 30px; }
  .mode-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .mode-card { padding: 20px; border-radius: var(--stili-radius-control); }
  .mode-card-title { font-size: 23px; }
  .mode-card-subtitle { font-size: 17px; }
  .mode-thumbnails { margin-top: 18px; gap: 10px; }
  .mode-thumbnails img { max-height: 340px; }
  .registration-note { font-size: 14px; margin-top: 18px; }
  .mode-meta { font-size: 15px; margin-bottom: 18px; }
  .comparison-instruction { font-size: 20px; }
  .pair { margin: 22px 0 0; gap: 16px; }
  .candidate img { max-height: min(60svh, 600px); }
}
@media (max-width: 374px) {
  .app-shell { padding-left: 16px; padding-right: 16px; }
  .site-header { margin-bottom: 20px; }
  .mode-meta { font-size: 11px; margin-bottom: 15px; gap: 7px; }
  h1 { font-size: 27px; }
  .pair { margin-left: -8px; margin-right: -8px; }
  .mode-card-title { font-size: 19px; }
}
@media (max-height: 700px) and (max-width: 699px) {
  .site-header { margin-bottom: 17px; }
  .mode-meta { margin-bottom: 13px; }
  .pair { margin-top: 15px; }
  .candidate img { max-height: 52svh; }
}
@supports (touch-action: pinch-zoom) {
  .pair, .candidate { touch-action: pinch-zoom; }
  .is-zoomed .pair, .is-zoomed .candidate { touch-action: manipulation; }
}
/* The viewport belongs to the comparison, while overflowing large text remains
   scrollable. No fixed-body lock or restriction on browser zoom is used. */
@media (max-width: 699px), (max-height: 600px) and (orientation: landscape) {
  html.has-comparison, .has-comparison body { overscroll-behavior-y: none; }
  .app-shell.is-comparison {
    height: 100vh;
    height: var(--comparison-viewport, 100vh);
    padding: 12px;
    padding: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    overflow: auto;
    overscroll-behavior: contain;
  }
  @supports (height: 100dvh) { .app-shell.is-comparison { height: 100dvh; } }
  .is-comparison #main { height: 100%; min-height: 0; }
  .is-comparison .comparison-screen { height: 100%; display: grid; grid-template-rows: auto minmax(160px, 1fr); gap: 8px; }
  .is-comparison .site-header { margin-bottom: 8px; gap: 8px; }
  .is-comparison .header-nav { font-size: 12px; }
  .is-comparison .preview-note { margin-bottom: 8px; padding: 6px 8px; }
  .is-comparison .mode-meta { font-size: 12px; margin-bottom: 8px; gap: 8px; }
  .is-comparison .comparison-heading { font-size: clamp(25px, 5.6vw, 32px); }
  .is-comparison .comparison-instruction { font-size: 15px; margin-top: 6px; }
  .is-comparison .status-area { min-height: 32px; margin: 6px 0 0; font-size: 13px; line-height: 1.35; }
  .is-comparison .pair {
    margin: 0;
    gap: 8px;
    align-self: start;
    height: 100%;
    max-height: calc((100vw - max(12px, env(safe-area-inset-left)) - max(12px, env(safe-area-inset-right)) - 8px) / 2 / var(--image-ratio, .75));
    min-height: 0;
  }
  .is-comparison .candidate, .is-comparison .pair.is-loading .candidate { height: 100%; min-height: 0; aspect-ratio: auto; }
  .is-comparison .candidate img { width: 100%; height: 100%; max-height: none; aspect-ratio: auto; object-fit: contain; }
}
@media (max-height: 600px) and (orientation: landscape) {
  .is-comparison .comparison-screen { grid-template-columns: clamp(160px, 24vw, 220px) minmax(0, 1fr); grid-template-rows: minmax(0, 1fr); gap: 14px; }
  .is-comparison .comparison-sidebar { min-height: 0; overflow-y: auto; overscroll-behavior-y: contain; padding-right: 3px; }
  .is-comparison .site-header { align-items: flex-start; margin-bottom: 6px; }
  .is-comparison .text-button { padding: 4px 0 4px 5px; }
  .is-comparison .preview-note { font-size: 11px; }
  .is-comparison .preview-actions { gap: 0 8px; }
  .is-comparison .preview-actions button { padding: 4px 0; }
  .is-comparison .mode-meta { flex-wrap: wrap; font-size: 11px; margin-bottom: 8px; }
  .is-comparison .comparison-heading { font-size: 23px; line-height: 1.12; }
  .is-comparison .comparison-instruction { font-size: 13px; }
  .is-comparison .status-area { min-height: 32px; font-size: 12px; }
  .is-comparison .pair { align-self: stretch; height: 100%; max-height: none; min-height: 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}