* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Comic Sans MS", "Trebuchet MS", system-ui, sans-serif;
  background: linear-gradient(135deg, #ff00cc, #3333ff, #00ffcc);
  background-size: 400% 400%;
  animation: slop-gradient 12s ease infinite;
  color: #111;
  min-height: 100vh;
  padding: 24px 16px 48px;
}

@keyframes slop-gradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero {
  max-width: 720px;
  margin: 0 auto 20px;
  text-align: center;
  background: rgba(255, 255, 0, 0.85);
  border: 6px dashed #ff0066;
  border-radius: 18px;
  padding: 20px;
  box-shadow: 8px 8px 0 #000;
}

.hero-title {
  margin: 0 0 6px;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  color: #d10000;
  text-shadow: 2px 2px 0 #fff, 4px 4px 0 #000;
  letter-spacing: 1px;
}

.hero-tagline {
  margin: 0 0 12px;
  font-weight: bold;
  font-style: italic;
  color: #0000cc;
}

.hero-blurb {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

.versions {
  max-width: 720px;
  margin: 0 auto 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.version-link {
  display: inline-block;
  padding: 8px 14px;
  background: #fff;
  border: 3px solid #000;
  border-radius: 999px;
  color: #000;
  text-decoration: none;
  font-weight: bold;
  box-shadow: 3px 3px 0 #000;
}

.version-link:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 #000;
}

.version-link.current {
  background: #00ff88;
}

.game {
  max-width: max-content;
  margin: 0 auto;
  background: #c0c0c0;
  border: 4px solid #7b7b7b;
  border-radius: 10px;
  padding: 14px;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.35);
}

.captcha-edition-badge {
  margin: -14px -14px 12px;
  padding: 7px 10px;
  border-bottom: 3px solid #111;
  background: #fff600;
  color: #111;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-align: center;
}

.game-hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: #bdbdbd;
  border: 3px inset #fff;
  padding: 8px 12px;
  margin-bottom: 12px;
}

.hud-readout {
  font-family: "Courier New", monospace;
  font-weight: bold;
  font-size: 1.5rem;
  background: #000;
  color: #ff2b2b;
  padding: 2px 8px;
  border-radius: 4px;
  min-width: 62px;
  text-align: center;
}

.hud-reset {
  font-size: 1.4rem;
  width: 44px;
  height: 44px;
  border: 3px outset #fff;
  background: #c0c0c0;
  cursor: pointer;
}

.hud-reset:active {
  border-style: inset;
}

.game-controls {
  margin-bottom: 12px;
  font-weight: bold;
}

.game-controls select {
  font: inherit;
  padding: 4px;
}

.board {
  display: grid;
  grid-template-columns: repeat(var(--cols, 9), 30px);
  gap: 0;
  background: #7b7b7b;
  border: 3px inset #fff;
  width: max-content;
}

.cell {
  width: 30px;
  height: 30px;
  margin: 0;
  padding: 0;
  font-family: "Courier New", monospace;
  font-weight: bold;
  font-size: 1rem;
  line-height: 1;
  border: 3px outset #fff;
  background: #c0c0c0;
  cursor: pointer;
  user-select: none;
}

.cell.revealed {
  border: 1px solid #9b9b9b;
  background: #d6d6d6;
  cursor: default;
}

.cell[data-value="1"] { color: #0000ff; }
.cell[data-value="2"] { color: #008200; }
.cell[data-value="3"] { color: #ff0000; }
.cell[data-value="4"] { color: #000084; }
.cell[data-value="5"] { color: #840000; }
.cell[data-value="6"] { color: #008284; }
.cell[data-value="7"] { color: #000000; }
.cell[data-value="8"] { color: #808080; }

.game-hint {
  margin: 12px 0 0;
  font-size: 0.85rem;
  color: #333;
  max-width: 340px;
}

.site-footer {
  margin: 32px auto 0;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(0, 0, 0, 0.7);
}

.captcha-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(9, 12, 20, 0.76);
  backdrop-filter: blur(5px);
}

.captcha-backdrop[hidden] {
  display: none;
}

.captcha-card {
  width: min(460px, 100%);
  overflow: hidden;
  background: #f5f5f5;
  border: 2px solid #111;
  border-radius: 8px;
  padding: 18px;
  box-shadow: 10px 12px 0 rgba(0, 0, 0, 0.7);
  font-family: Arial, Helvetica, sans-serif;
}

.captcha-stripe {
  height: 12px;
  margin: -18px -18px 16px;
  background: repeating-linear-gradient(
    135deg,
    #1976d2 0,
    #1976d2 14px,
    #fff 14px,
    #fff 28px,
    #ffeb3b 28px,
    #ffeb3b 42px,
    #111 42px,
    #111 56px
  );
}

.captcha-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 14px;
  color: #fff;
  background: #1976d2;
}

.captcha-heading h2 {
  margin: 2px 0 0;
  font-size: clamp(1.35rem, 6vw, 2rem);
  line-height: 1;
}

.captcha-kicker {
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.15em;
}

.captcha-number {
  padding: 4px 6px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  font-family: "Courier New", monospace;
  font-size: 0.75rem;
}

.captcha-reason {
  margin: 14px 0 8px;
  color: #b00020;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
}

.captcha-prompt {
  min-height: 44px;
  margin: 0 0 14px;
  font-weight: 700;
  line-height: 1.35;
}

.local-captcha {
  margin-top: 14px;
}

.captcha-image {
  display: block;
  width: 100%;
  height: 100px;
  border: 3px solid #111;
  background: #eee;
  object-fit: fill;
}

.captcha-entry {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  margin-top: 10px;
}

.captcha-entry input {
  min-width: 0;
  padding: 10px;
  border: 3px solid #111;
  font: 900 1rem/1 "Courier New", monospace;
}

.captcha-entry button,
.captcha-refresh {
  border: 3px solid #111;
  background: #fff600;
  color: #111;
  font-weight: 900;
  cursor: pointer;
  box-shadow: 3px 3px 0 #111;
}

.captcha-entry button {
  padding: 8px;
}

.captcha-refresh {
  width: 100%;
  margin-top: 9px;
  padding: 7px;
  background: #fff;
}

.captcha-entry button:active,
.captcha-refresh:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 #111;
}

.captcha-entry button:disabled {
  cursor: wait;
  filter: grayscale(1);
}

.captcha-answers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.captcha-answer {
  min-height: 72px;
  border: 3px solid #111;
  background: #fff;
  color: #111;
  font: 900 1.2rem/1 Arial, Helvetica, sans-serif;
  cursor: pointer;
  box-shadow: 3px 3px 0 #111;
}

.captcha-answer:hover,
.captcha-answer:focus-visible {
  outline: 3px solid #ff00aa;
  outline-offset: -6px;
  background: #fff600;
}

.captcha-answer:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 #111;
}

.captcha-answer:disabled {
  cursor: wait;
  filter: grayscale(1);
}

.captcha-status {
  min-height: 18px;
  margin: 13px 0 10px;
  color: #666;
  font-size: 0.75rem;
  font-style: italic;
}

.captcha-status.bad {
  color: #d00000;
  font-weight: 900;
}

.captcha-status.good {
  color: #087f23;
  font-weight: 900;
}

.captcha-footer {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid #bbb;
  color: #777;
  font-size: 0.62rem;
}

.captcha-logo {
  color: #1976d2;
  font-weight: 900;
}

.captcha-wrong {
  animation: captcha-wrong 0.35s linear;
}

@keyframes captcha-wrong {
  0%, 100% { transform: translateX(0) rotate(0); }
  20% { transform: translateX(-12px) rotate(-1deg); }
  40% { transform: translateX(12px) rotate(1deg); }
  60% { transform: translateX(-8px) rotate(-1deg); }
  80% { transform: translateX(8px) rotate(1deg); }
}