/*
  Puzzle Kit: design tokens and the components every puzzle shares.

  Tokens live on :root. The host page chooses the theme by setting data-theme="light"
  or data-theme="dark" on <html> (PuzzleKit.applyTheme does this). With no attribute the
  theme follows the system setting. Puzzles use only these tokens, never literal colours.
*/
:root {
  --pz-font-display: 'Outfit', system-ui, sans-serif;
  --pz-font-body: 'Figtree', system-ui, sans-serif;
  color-scheme: dark;
  --pz-bg: #17181e;
  --pz-panel: #22242c;
  --pz-panel-2: #2c2f3a;
  --pz-line: #3b3e4a;
  --pz-fg: #eef0f6;
  --pz-muted: #9a9fb0;
  --pz-rim: #aeb2c0;
  --pz-accent: #4d73f5;
  --pz-accent-fg: #ffffff;
  --pz-ok: #5ec79a;
  --pz-bad: #f08a8a;
  --pz-pop: #f2b84b;
  --pz-water: #3d5fd0;
  --pz-goat: #e0b87a;
  --pz-wolf: #9aa3bb;
  --pz-cab: #5ec79a;
  --pz-ball: #6f88ee;
  --pz-hull: #8a8fa3;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --pz-bg: #eceef4; --pz-panel: #ffffff; --pz-panel-2: #e9ecf4; --pz-line: #cfd3df;
    --pz-fg: #1b1e2a; --pz-muted: #626879; --pz-rim: #7d8396;
    --pz-accent: #3556d8; --pz-accent-fg: #ffffff; --pz-ok: #1f8a5e; --pz-bad: #c23b3b; --pz-pop: #d98b00;
    --pz-water: #86a0f4; --pz-goat: #b9873f; --pz-wolf: #5d6680; --pz-cab: #2f9e6b; --pz-ball: #4a63d6; --pz-hull: #7d8396;
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --pz-bg: #eceef4; --pz-panel: #ffffff; --pz-panel-2: #e9ecf4; --pz-line: #cfd3df;
  --pz-fg: #1b1e2a; --pz-muted: #626879; --pz-rim: #7d8396;
  --pz-accent: #3556d8; --pz-accent-fg: #ffffff; --pz-ok: #1f8a5e; --pz-bad: #c23b3b; --pz-pop: #d98b00;
  --pz-water: #86a0f4; --pz-goat: #b9873f; --pz-wolf: #5d6680; --pz-cab: #2f9e6b; --pz-ball: #4a63d6; --pz-hull: #7d8396;
}

/* Base */
.pz { font-family: var(--pz-font-body); font-size: 16px; line-height: 1.5; color: var(--pz-fg); }
.pz *, .pz *::before, .pz *::after { box-sizing: border-box; }
.pz [hidden] { display: none !important; }
.pz-wrap { max-width: 640px; margin: 0 auto; display: grid; gap: 20px; }
.pz-title {
  font-family: var(--pz-font-display);
  font-weight: 600;
  font-size: clamp(28px, 6vw, 36px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}
.pz-lede { margin: 8px 0 0; color: var(--pz-muted); max-width: 60ch; }
.pz-card { background: var(--pz-panel); border: 1px solid var(--pz-line); border-radius: 20px; overflow: hidden; container-type: inline-size; }

/* Collapsible intro */
.pz-head-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.pz-intro-toggle {
  flex: none; display: grid; place-items: center; width: 36px; height: 36px;
  border: 0; border-radius: 50%; background: var(--pz-panel-2); color: var(--pz-muted); cursor: pointer;
}
.pz-intro-toggle:hover { color: var(--pz-fg); }
.pz-intro-toggle svg { transition: transform .3s ease; }
.pz-intro-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
.pz-intro-toggle:focus-visible { outline: 3px solid var(--pz-accent); outline-offset: 2px; }
.pz-intro { display: grid; grid-template-rows: 1fr; transition: grid-template-rows .3s ease, opacity .3s ease; }
.pz-intro[data-open="0"] { grid-template-rows: 0fr; opacity: 0; }
.pz-intro-inner { overflow: hidden; min-height: 0; }

/* Message banner: guidance, warnings, failure and success, tinted by tone */
.pz-banner {
  --tone: var(--pz-accent);
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 16px 16px 0;
  padding: 14px 16px;
  min-height: 76px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--tone) 15%, var(--pz-panel));
  border: 1.5px solid color-mix(in srgb, var(--tone) 55%, transparent);
  transition: background .25s ease, border-color .25s ease;
}
.pz-banner[data-tone="ok"] { --tone: var(--pz-ok); }
.pz-banner[data-tone="warn"] { --tone: var(--pz-pop); }
.pz-banner[data-tone="bad"] { --tone: var(--pz-bad); }
.pz-banner p { margin: 0; min-width: 0; font-size: 17px; font-weight: 500; line-height: 1.35; color: var(--pz-fg); }
.pz-b-ic {
  flex: none;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid var(--tone);
  color: var(--tone);
}
.pz-b-ic svg { display: none; width: 20px; height: 20px; }
.pz-banner[data-tone="info"] .i-info,
.pz-banner[data-tone="ok"] .i-ok,
.pz-banner[data-tone="warn"] .i-warn,
.pz-banner[data-tone="bad"] .i-bad { display: block; }
.pz-banner.pz-pulse { animation: pz-bpulse .6s ease; }
@keyframes pz-bpulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--tone) 50%, transparent); transform: scale(1.015); }
  100% { box-shadow: 0 0 0 12px transparent; transform: scale(1); }
}

/* Stage: each puzzle styles its own contents */
.pz-stage { position: relative; margin-top: 8px; overflow: hidden; }
.pz-shake { animation: pz-shake .32s ease; }
@keyframes pz-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* Stats strip (below the action row) */
.pz-stats { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--pz-line); }
.pz-stat { padding: 12px 8px; text-align: center; min-width: 0; }
.pz-k { color: var(--pz-muted); font-size: 13px; }
.pz-v { font-family: var(--pz-font-display); font-weight: 600; font-size: 19px; font-variant-numeric: tabular-nums; }
.pz-v.pz-active { color: var(--pz-accent); }
.pz-v.pz-solved { color: var(--pz-ok); }
.pz-v.pz-over { color: var(--pz-bad); }
.pz-extra:empty { display: none; }

/* Controls */
.pz-controls { padding: 12px 12px 16px; display: grid; gap: 12px; justify-items: center; }
.pz-actions { gap: 8px; }
.pz-btn { position: relative; }
.pz-btn.pz-ready { animation: pz-ready .9s ease 2; }
@keyframes pz-ready {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--pz-accent) 60%, transparent); }
  100% { box-shadow: 0 0 0 14px transparent; }
}
.pz-glow { animation: pz-glow 1.6s ease; }
@keyframes pz-glow {
  0%, 100% { box-shadow: 0 0 0 0 transparent; }
  25%, 70% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--pz-pop) 70%, transparent); }
}
.pz-badge-n {
  position: absolute; top: -4px; right: -2px; min-width: 18px; height: 18px; padding: 0 5px;
  border-radius: 9px; background: var(--pz-pop); color: #1b1e2a; font-size: 12px; font-weight: 700; line-height: 18px; text-align: center;
}
/* Narrow boards: secondary actions shrink to icons, the primary keeps its label */
@container (max-width: 520px) {
  .pz-actions { gap: 6px; }
  .pz-btn.pz-primary, .pz-btn.pz-keep { padding: 12px 16px; font-size: 16px; }
  .pz-btn.pz-has-icon:not(.pz-primary):not(.pz-keep) { padding: 12px; }
  .pz-btn.pz-has-icon:not(.pz-primary):not(.pz-keep) > span:not(.pz-badge-n) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
}
.pz-row { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; justify-content: center; }
.pz-row-label { color: var(--pz-muted); font-size: 15px; }
.pz-seg { display: inline-flex; background: var(--pz-panel-2); border-radius: 999px; padding: 4px; gap: 2px; max-width: 100%; }
.pz-seg button {
  border: 0; background: transparent; color: var(--pz-muted);
  font: inherit; font-weight: 500; font-size: 15px;
  padding: 8px 14px; border-radius: 999px; cursor: pointer; white-space: nowrap;
}
.pz-seg button:hover:not(:disabled) { color: var(--pz-fg); }
.pz-seg button[aria-pressed="true"] { background: var(--pz-accent); color: var(--pz-accent-fg); }
.pz-seg button:disabled { opacity: .5; cursor: default; }
.pz-btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: 0; background: var(--pz-panel-2); color: var(--pz-fg);
  font: inherit; font-weight: 600; font-size: 17px;
  padding: 12px 22px; border-radius: 999px; cursor: pointer;
}
.pz-btn.pz-primary { background: var(--pz-accent); color: var(--pz-accent-fg); }
.pz-btn:hover:not(:disabled) { background: color-mix(in srgb, var(--pz-panel-2) 80%, var(--pz-fg)); }
.pz-btn.pz-primary:hover:not(:disabled) { background: color-mix(in srgb, var(--pz-accent) 85%, var(--pz-fg)); }
.pz-btn:disabled { opacity: .45; cursor: default; }
.pz-seg button:focus-visible, .pz-btn:focus-visible { outline: 3px solid var(--pz-accent); outline-offset: 2px; }

/* Success splash */
.pz-win {
  position: fixed; inset: 0; z-index: 50;
  display: grid; place-items: center; overflow: hidden;
  background: color-mix(in srgb, var(--pz-bg) 82%, transparent);
  backdrop-filter: blur(4px);
  padding: max(16px, env(safe-area-inset-top, 0px)) max(16px, env(safe-area-inset-right, 0px)) max(16px, env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px));
}
.pz-win-card {
  position: relative; z-index: 1; width: 100%; max-width: 380px; text-align: center;
  background: var(--pz-panel); border: 1px solid var(--pz-line); border-radius: 24px;
  padding: 32px 28px 28px;
  animation: pz-pop .45s cubic-bezier(.2, 1.3, .4, 1);
}
@keyframes pz-pop { from { transform: scale(.85); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.pz-badge { display: block; margin: 0 auto 16px; }
.pz-tick { stroke-dasharray: 1; stroke-dashoffset: 1; animation: pz-draw .5s .25s ease forwards; }
.pz-win[data-kind="reached"] .pz-badge-bg { fill: var(--pz-pop); }
.pz-win[data-kind="reached"] .pz-tick-ok, .pz-win[data-kind="solved"] .pz-tick-flag { display: none; }
.pz-win[data-kind="reached"] .pz-tick-flag { stroke: #1b1e2a; }
@keyframes pz-draw { to { stroke-dashoffset: 0; } }
.pz-win h2 { font-family: var(--pz-font-display); font-weight: 600; font-size: 32px; line-height: 1.1; margin: 0 0 8px; }
.pz-win p { margin: 0; color: var(--pz-muted); }
.pz-win p + p { margin-top: 4px; }
.pz-win-actions { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.pz-win-actions .pz-btn { font-size: 16px; }
.pz-bit {
  position: fixed; top: -24px; left: var(--l);
  width: var(--s); height: var(--s);
  background: var(--c); border-radius: var(--br);
  pointer-events: none;
  animation: pz-fall var(--t) ease-in var(--d) forwards;
}
@keyframes pz-fall { to { transform: translate3d(var(--x), 110vh, 0) rotate(var(--r)); } }

/* Reduced motion: follows the system unless the user preference says otherwise (data-reduce) */
@media (prefers-reduced-motion: reduce) {
  .pz:not([data-reduce="0"]) *, .pz:not([data-reduce="0"]) *::before, .pz:not([data-reduce="0"]) *::after {
    animation-duration: .01ms !important; transition-duration: .01ms !important;
  }
}
.pz[data-reduce="1"] *, .pz[data-reduce="1"] *::before, .pz[data-reduce="1"] *::after {
  animation-duration: .01ms !important; transition-duration: .01ms !important;
}