:root {
  color-scheme: light;
  --paper: #fff;
  --background: #f5f5f5;
  --ink: #242424;
  --blue: #3479cc;
  --blue-dark: #2868b5;
  --border: #d6d6d6;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--background);
}

* { box-sizing: border-box; }

body { margin: 0; }

main {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
}

button { font: inherit; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }

.captcha {
  width: min(404px, 100%);
  padding: 7px;
  border: 1px solid var(--border);
  background: var(--paper);
  box-shadow: 0 2px 6px #00000018;
}

.prompt {
  padding: 23px 18px 20px;
  background: var(--blue);
  color: #fff;
}

.prompt > span { font-size: 15px; line-height: 1.4; }
.prompt h1 { margin: 4px 0 15px; font-size: 27px; line-height: 1.15; }
.prompt h1 span { white-space: nowrap; }
.prompt p { margin: 0; font-size: 12px; line-height: 1.5; }

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 3px;
  margin-top: 7px;
}

.tile {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 1;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: #e5e5e5;
  cursor: pointer;
}

.tile:disabled { cursor: default; }

.picture {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: transform 110ms ease-out;
  user-select: none;
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
}

.ready .picture { opacity: 1; }
.tile[aria-pressed="true"] { background: #e6effa; }
.tile[aria-pressed="true"] .picture { transform: scale(.84); }

.checkmark {
  position: absolute;
  top: 5px;
  left: 5px;
  width: 26px;
  height: 26px;
  border: 2px solid var(--paper);
  border-radius: 50%;
  background: var(--blue);
  color: white;
  display: none;
  place-items: center;
}

.checkmark svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2.5; }
.tile[aria-pressed="true"] .checkmark { display: grid; }
.tile:focus-visible { outline: 3px solid #111; outline-offset: -3px; z-index: 1; }

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 7px;
  padding: 12px 4px 5px;
  border-top: 1px solid #e7e7e7;
}

.identity { display: flex; align-items: center; gap: 8px; color: #767676; }
.identity svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.identity span { font-size: 10px; font-weight: 700; letter-spacing: 1px; }

.verify {
  min-width: 106px;
  min-height: 48px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 2px;
  background: var(--blue);
  color: white;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .4px;
  cursor: pointer;
}

.verify:hover:not(:disabled) { background: var(--blue-dark); }
.verify:focus-visible { outline: 3px solid #222; outline-offset: 3px; }
.verify:disabled { background: #729aca; cursor: default; }
.notice { margin: 9px 4px 3px; color: #666; font-size: 12px; line-height: 1.4; }
.notice:empty { display: none; }
.notice.error { color: #a32e2e; }

.verdict { text-align: center; }
.verdict h1 { margin: 0; font-size: clamp(24px, 5.5vw, 34px); line-height: 1.3; font-weight: 400; }
.verdict h1:focus { outline: none; }
[hidden] { display: none !important; }

@media (max-width: 360px) {
  main { padding: max(16px, env(safe-area-inset-top)) max(9px, env(safe-area-inset-right)) max(16px, env(safe-area-inset-bottom)) max(9px, env(safe-area-inset-left)); }
  .prompt { padding: 19px 14px 17px; }
  .prompt h1 { font-size: 25px; }
  .prompt p { font-size: 11px; }
}

@media (max-height: 540px) and (min-width: 480px) and (orientation: landscape) {
  main { 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)); }
  .captcha {
    width: min(620px, calc(100svh + 150px), 100%);
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    grid-template-rows: 1fr auto;
    gap: 7px;
  }
  .prompt { grid-column: 1; grid-row: 1; padding: 12px 14px; }
  .prompt > span { font-size: 13px; }
  .prompt h1 { font-size: 23px; margin-bottom: 10px; }
  .prompt p { font-size: 11px; }
  .grid { grid-column: 2; grid-row: 1 / span 2; margin: 0; align-self: center; }
  .controls { grid-column: 1; grid-row: 2; margin: 0; padding: 8px 4px 0; flex-wrap: wrap; gap: 8px; }
  .identity svg { width: 20px; height: 20px; }
  .verify { width: 100%; }
  .notice { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}