@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,650&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap");
@import url("../assets/css/puzzle-history.css");

:root {
  --pf-bg: #0c1118;
  --pf-bg-2: #121a24;
  --pf-elev: #17202c;
  --pf-elev-2: #1c2735;
  --pf-border: #2a384a;
  --pf-border-strong: #3d5168;
  --pf-text: #e8eef6;
  --pf-muted: #8b9bb0;
  --pf-faint: #66758a;
  --pf-gold: #e0b84e;
  --pf-gold-deep: #c4922a;
  --pf-gold-soft: rgba(224, 184, 78, 0.16);
  --pf-teal: #5ec8c5;
  --pf-shadow: 0 22px 50px rgba(0, 0, 0, 0.42);
  --pf-radius: 16px;
  --pf-sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --pf-serif: "Fraunces", Georgia, serif;
}

html.pf-standalone,
html.pf-standalone body {
  margin: 0;
  height: 100%;
  background: var(--pf-bg);
  color: var(--pf-text);
  font-family: var(--pf-sans);
  color-scheme: dark;
}

html.pf-standalone body {
  background:
    radial-gradient(1000px 480px at 8% -10%, rgba(61, 134, 255, 0.12), transparent 55%),
    radial-gradient(800px 420px at 100% 0%, rgba(61, 206, 87, 0.08), transparent 50%),
    var(--pf-bg);
}

html.pf-standalone #pf-root {
  height: 100%;
  height: 100dvh;
}

.pf-page-wrap {
  padding-top: 8rem;
  padding-bottom: 4rem;
  min-height: 100vh;
}

.pf-page-wrap #pf-root {
  max-width: 760px;
  margin: 0 auto;
}

.pf-app {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  color: var(--pf-text);
  font-family: var(--pf-sans);
  position: relative;
}

.pf-page-wrap .pf-app {
  min-height: auto;
  background: var(--pf-bg);
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius);
  box-shadow: var(--pf-shadow);
  overflow: hidden;
}

html.pf-standalone .pf-app { height: 100%; overflow: hidden; }
html.pf-standalone .pf-view { overflow: auto; flex: 1; min-height: 0; }

* { box-sizing: border-box; }
button { font-family: inherit; cursor: pointer; }

.pf-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--pf-border);
  background: rgba(12, 17, 24, 0.92);
  flex-shrink: 0;
}

.pf-brand { display: flex; align-items: center; gap: 10px; min-width: 0; }

.pf-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #243044, #121820);
  box-shadow: inset 0 0 0 1px rgba(224, 184, 78, 0.35);
  flex-shrink: 0;
}

.pf-mark svg { width: 22px; height: 22px; }

.pf-brand h1 {
  margin: 0;
  font-family: var(--pf-serif);
  font-size: 1.25rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.pf-brand p { margin: 2px 0 0; font-size: 12px; color: var(--pf-muted); }
.pf-header-actions { margin-left: auto; display: flex; gap: 8px; }

.pf-icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--pf-border);
  background: var(--pf-elev);
  color: var(--pf-text);
  display: grid;
  place-items: center;
}

.pf-icon-btn:hover { border-color: var(--pf-gold); }
.pf-icon-btn svg { width: 18px; height: 18px; }

.pf-view { padding: 22px 18px 28px; }
.pf-splash { max-width: 680px; margin: 0 auto; }
.pf-hero { text-align: center; margin-bottom: 28px; }

.pf-hero h2 {
  font-family: var(--pf-serif);
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 650;
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.pf-hero p {
  margin: 0 auto;
  max-width: 54ch;
  color: var(--pf-muted);
  line-height: 1.55;
  font-size: 15px;
}

.pf-stats-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 26px;
}

.pf-stat {
  background: var(--pf-elev);
  border: 1px solid var(--pf-border);
  border-radius: 12px;
  padding: 12px 10px;
  text-align: center;
}

.pf-stat b {
  display: block;
  font-variant-numeric: tabular-nums;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--pf-gold);
}

.pf-stat span {
  display: block;
  margin-top: 3px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--pf-faint);
}

.pf-play-grid { display: grid; gap: 12px; }

.pf-play-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  text-align: left;
  border: 1px solid var(--pf-border);
  border-radius: 14px;
  padding: 16px;
  background: linear-gradient(180deg, var(--pf-elev), var(--pf-bg-2));
  color: inherit;
}

.pf-play-card:hover { border-color: var(--pf-gold); transform: translateY(-2px); }
.pf-play-card.primary {
  border-color: rgba(224, 184, 78, 0.45);
  background: linear-gradient(135deg, var(--pf-gold-soft), transparent 55%), linear-gradient(180deg, var(--pf-elev), var(--pf-bg-2));
}

.pf-play-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--pf-elev-2);
  color: var(--pf-teal);
  flex-shrink: 0;
}

.pf-play-icon svg { width: 22px; height: 22px; }
.pf-play-card strong { display: block; font-size: 15px; }
.pf-play-card span span { display: block; margin-top: 3px; font-size: 13px; color: var(--pf-muted); }
.pf-play-card em { display: block; margin-top: 4px; font-style: normal; font-size: 12px; color: var(--pf-gold); }

.pf-app .ph-cal-launch {
  border-color: var(--pf-border);
  background: linear-gradient(180deg, var(--pf-elev), var(--pf-bg-2));
  color: var(--pf-teal);
}

.pf-app .ph-cal-launch:hover {
  border-color: var(--pf-gold);
  color: var(--pf-gold);
}

.pf-diff { margin-top: 22px; }

.pf-map {
  margin: 8px 0 18px;
  background: linear-gradient(180deg, var(--pf-elev), var(--pf-bg-2));
  border: 1px solid var(--pf-border);
  border-radius: 18px;
  padding: 16px;
}

.pf-map-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.pf-map-head strong {
  display: block;
  font-family: var(--pf-serif);
  font-size: 1.25rem;
  font-weight: 650;
  line-height: 1.15;
}

.pf-map-head span {
  display: block;
  margin-top: 3px;
  color: var(--pf-muted);
  font-size: 13px;
}

.pf-map .ph-cal-launch {
  width: 52px;
  align-self: stretch;
}

.pf-levels {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.pf-level {
  aspect-ratio: 1.05;
  border-radius: 12px;
  border: 1px solid var(--pf-border-strong);
  background: linear-gradient(180deg, #2a3c52, #1a2838);
  color: var(--pf-text);
  font-family: var(--pf-serif);
  font-size: 1.35rem;
  font-weight: 650;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 5px 0 #101820;
  padding: 0;
}

.pf-level b { font-weight: 650; }

.pf-level:hover:not(:disabled) { border-color: var(--pf-gold); transform: translateY(-1px); }

.pf-level.is-current {
  border-color: var(--pf-gold);
  color: var(--pf-gold);
  box-shadow: inset 0 0 0 1px rgba(224, 184, 78, 0.45), 0 5px 0 #101820;
}

.pf-level.is-done { color: var(--pf-teal); }

.pf-level.is-locked {
  color: #9aabbf;
  background: #15202c;
  border-color: var(--pf-border);
  box-shadow: none;
  cursor: default;
}

.pf-level svg { display: block; width: 22px; height: 22px; }

.pf-level-check {
  position: absolute;
  top: 5px;
  right: 7px;
  font-style: normal;
  font-family: var(--pf-sans);
  font-size: 11px;
  font-weight: 700;
}

.pf-map-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 14px;
}

.pf-map-actions .pf-btn {
  min-width: 7.5rem;
  justify-content: center;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pf-diff-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pf-faint);
  margin-bottom: 8px;
}

.pf-seg {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  background: var(--pf-bg-2);
  border: 1px solid var(--pf-border);
  border-radius: 12px;
  padding: 6px;
}

.pf-seg button {
  border: 0;
  background: transparent;
  color: var(--pf-muted);
  font-weight: 650;
  font-size: 13px;
  padding: 10px 8px;
  border-radius: 8px;
}

.pf-seg button.active {
  background: var(--pf-elev-2);
  color: var(--pf-text);
  box-shadow: 0 0 0 1px var(--pf-border-strong);
}

.pf-seg button small {
  display: block;
  font-weight: 500;
  font-size: 11px;
  color: var(--pf-faint);
  margin-top: 2px;
}

.pf-how {
  border: 0;
  background: transparent;
  color: var(--pf-teal);
  font-weight: 650;
  font-size: 14px;
  padding: 8px;
}

.pf-how:hover { text-decoration: underline; }

.pf-play { width: min(100%, 640px); margin: 0 auto; }

.pf-hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 14px;
}

.pf-hud-item .lbl {
  display: block;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pf-faint);
}

.pf-hud-item .val {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.05rem;
}

.pf-toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin-left: auto; }

.pf-btn {
  border: 1px solid var(--pf-border);
  background: var(--pf-elev);
  color: var(--pf-text);
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 650;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pf-btn:hover { border-color: var(--pf-border-strong); background: var(--pf-elev-2); }
.pf-btn:disabled { opacity: 0.45; cursor: default; pointer-events: none; }
.pf-btn.gold { background: linear-gradient(180deg, var(--pf-gold), var(--pf-gold-deep)); border-color: transparent; color: #1a1408; }
.pf-btn.ghost { background: transparent; color: var(--pf-muted); }
.pf-btn.ghost:hover { color: var(--pf-text); border-color: var(--pf-border-strong); }
.pf-btn svg { width: 16px; height: 16px; }

.pf-meter {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  margin: 0 auto 12px;
  width: max-content;
  max-width: 100%;
}

.pf-meter .lbl {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pf-faint);
}

.pf-meter b {
  font-variant-numeric: tabular-nums;
  font-size: 1.15rem;
  min-width: 3.2rem;
  text-align: right;
}

.pf-meter-track {
  width: min(280px, 46vw);
  height: 10px;
  border-radius: 999px;
  background: #101820;
  box-shadow: inset 0 0 0 1px var(--pf-border);
  overflow: hidden;
}

.pf-meter-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #2f7dff, #3dce57 55%, var(--pf-gold));
  width: 0;
}

.pf-board {
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
  padding: 10px;
  background:
    radial-gradient(420px 180px at 50% 0%, rgba(61, 134, 255, 0.08), transparent 60%),
    #0c1218;
  border: 1px solid var(--pf-border);
  border-radius: 18px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.pf-stage {
  --cell: 72px;
  position: relative;
  width: max-content;
  max-width: 100%;
  touch-action: none;
  user-select: none;
}

.pf-stage[data-n="6"] { --cell: 62px; }
.pf-stage[data-n="7"] { --cell: 54px; }
.pf-stage[data-n="8"] { --cell: 46px; }

.pf-grid {
  display: grid;
  grid-template-columns: repeat(var(--n), var(--cell));
  grid-template-rows: repeat(var(--n), var(--cell));
  gap: 0;
  touch-action: none;
}

.pf-cell {
  width: var(--cell);
  height: var(--cell);
  border: 0;
  padding: 0;
  background: #1a2940;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  touch-action: none;
}

button.pf-cell { cursor: crosshair; }
button.pf-cell:focus-visible { outline: 2px solid var(--pf-gold); outline-offset: -3px; }

.pf-paths {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: visible;
}

.pf-paths,
.pf-paths * {
  pointer-events: none;
  fill: none !important;
}

.pf-ends,
.pf-ends * {
  pointer-events: none;
}

.pf-ends {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(var(--n), var(--cell));
  grid-template-rows: repeat(var(--n), var(--cell));
}

.pf-ring {
  width: 62%;
  height: 62%;
  margin: auto;
  border-radius: 50%;
  box-sizing: border-box;
  border: calc(var(--cell) * 0.08) solid currentColor;
  background: #121820;
}

.pf-ring.c0 { color: #4c8dff; }
.pf-ring.c1 { color: #3dce57; }
.pf-ring.c2 { color: #e0b84e; }
.pf-ring.c3 { color: #e23b42; }
.pf-ring.c4 { color: #b07cff; }

.pf-legend {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin: 12px 0 0;
  color: var(--pf-muted);
  font-size: 12px;
  font-weight: 650;
}

.pf-legend span { display: inline-flex; align-items: center; gap: 6px; }

.pf-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid var(--pf-teal);
  background: #070b10;
  box-sizing: border-box;
}

.pf-dot.src { box-shadow: inset 0 0 0 3px #070b10, inset 0 0 0 5px var(--pf-teal); }

.pf-status {
  margin: 12px auto 0;
  max-width: 46ch;
  text-align: center;
  font-size: 13px;
  color: var(--pf-muted);
  line-height: 1.45;
}

.pf-overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 10, 16, 0.62);
  display: grid;
  place-items: center;
  z-index: 20;
  padding: 18px;
}

.pf-modal {
  width: min(100%, 480px);
  background: var(--pf-elev);
  border: 1px solid var(--pf-border);
  border-radius: 16px;
  padding: 22px 22px 18px;
  text-align: center;
  box-shadow: var(--pf-shadow);
  max-height: min(92vh, 760px);
  overflow: auto;
}

.pf-modal h2 { font-family: var(--pf-serif); margin: 0 0 8px; font-size: 1.7rem; }
.pf-modal p, .pf-modal ol { color: var(--pf-muted); font-size: 14px; line-height: 1.55; text-align: left; }
.pf-modal ol { padding-left: 1.2rem; }
.pf-modal .pf-end-note { text-align: center; margin-top: 0; }

.pf-win-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin: 16px 0;
}

.pf-win-stats div { background: var(--pf-bg-2); border-radius: 10px; padding: 10px 6px; }
.pf-win-stats b { display: block; font-size: 1.05rem; }
.pf-win-stats span { font-size: 11px; color: var(--pf-muted); }

.pf-modal-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px; }

.pf-lesson-kicker {
  margin: 0 0 4px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pf-gold);
}

.pf-lesson-copy { margin: 8px 0 0; }
.pf-lesson .pf-stage { --cell: 64px; }

.pf-toast {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%) translateY(12px);
  background: var(--pf-elev-2);
  border: 1px solid var(--pf-border-strong);
  color: var(--pf-text);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 650;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 30;
}

.pf-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .pf-play-card:hover { transform: none; }
}

@media (max-width: 640px) {
  .pf-stats-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pf-toolbar { margin-left: 0; }
  .pf-header { padding: 10px 12px; }
  .pf-levels { gap: 8px; }
  .pf-level { font-size: 1.15rem; border-radius: 10px; box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 3px 0 #101820; }
  .pf-level.is-current { box-shadow: inset 0 0 0 1px rgba(224, 184, 78, 0.45), 0 3px 0 #101820; }
  .pf-win-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pf-stage[data-n="5"] { --cell: 58px; }
  .pf-stage[data-n="6"] { --cell: 50px; }
  .pf-stage[data-n="7"] { --cell: 42px; }
  .pf-stage[data-n="8"] { --cell: 36px; }
  .pf-meter { grid-template-columns: auto 1fr; }
  .pf-meter b { grid-column: 2; grid-row: 1; }
  .pf-meter-track { grid-column: 1 / -1; width: 100%; }
}