:root {
  --bg: #151d2c;
  --panel: #1d2a40;
  --panel2: #293a59;
  --text: #f8fbff;
  --muted: #aeb9ca;
  --gold: #ffd166;
  --pink: #ff7a7a;
  --mint: #80f0b0;
  --line: rgba(255, 255, 255, .13);
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 16% -8%, rgba(255, 122, 122, .22), transparent 34%),
    radial-gradient(circle at 86% 12%, rgba(128, 240, 176, .13), transparent 30%),
    linear-gradient(180deg, #151d2c 0%, #111827 100%);
  font-family: "Be Vietnam Pro", Inter, system-ui, sans-serif;
  font-size: 16px;
}

button { font: inherit; -webkit-tap-highlight-color: transparent; }
h1, h2, p { margin-top: 0; }
h1, h2 { letter-spacing: -.055em; line-height: 1.06; }
h1 { margin-bottom: 0; font-size: clamp(46px, 9vw, 76px); }
h2 { margin-bottom: 8px; font-size: clamp(24px, 4vw, 36px); }
p { color: var(--muted); line-height: 1.7; }

.app-shell {
  width: min(1180px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 22px 34px;
}

.topbar {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
}
.brand span,
.hero-icons span {
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--panel2);
}
.brand span {
  width: 42px;
  height: 42px;
  border-radius: 15px;
  font-size: 24px;
}
.brand strong { font-size: 20px; letter-spacing: -.04em; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
}

.icon-button {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--mint);
  background: rgba(29, 42, 64, .74);
  cursor: pointer;
  font-size: 18px;
  font-weight: 900;
}
.best-score {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(29, 42, 64, .62);
  font-size: 14px;
  font-weight: 800;
}
.best-score strong { color: var(--gold); }

.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mint);
  background: rgba(29, 42, 64, .74);
  text-decoration: none;
  font-weight: 900;
}

.title-block { text-align: right; }
.eyebrow {
  margin: 0 0 9px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

main {
  min-height: calc(100vh - 152px);
  display: grid;
  align-items: center;
}

.screen {
  display: none;
  width: 100%;
  animation: enter .25s ease;
}
.screen.active { display: block; }
@keyframes enter { from { opacity: 0; transform: translateY(10px); } }

.welcome {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 32px 0 54px;
  text-align: center;
}
.hero-icons {
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
}
.hero-icons span {
  width: 94px;
  height: 94px;
  border-radius: 24px;
  color: var(--text);
  font-size: 46px;
  font-weight: 900;
  box-shadow: 0 20px 55px rgba(0, 0, 0, .2);
  transform: rotate(-7deg);
}
.hero-icons span:nth-child(2) {
  z-index: 2;
  width: 110px;
  height: 110px;
  color: #151d2c;
  background: var(--gold);
  transform: translateY(-10px) rotate(4deg);
}
.hero-icons span:nth-child(3) { transform: rotate(8deg); }
.intro {
  max-width: 660px;
  margin: 22px auto 30px;
  color: var(--muted);
  font-size: 17px;
  font-weight: 750;
}
.welcome .primary-button,
.secondary-button {
  width: 100%;
  min-height: 66px;
  border-radius: 17px;
  font-size: 18px;
}
.secondary-button {
  margin-top: 12px;
  border: 1px solid var(--line);
  color: var(--text);
  background: transparent;
  cursor: pointer;
  font-weight: 900;
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(250px, 318px) minmax(0, 1fr);
  gap: 16px;
  align-items: stretch;
}

footer {
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}
footer a { color: var(--mint); text-decoration: none; }

.control-rail,
.play-stage {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(29, 42, 64, .82);
  box-shadow: 0 22px 60px rgba(0, 0, 0, .18);
}

.control-rail {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px;
}

.level-list { display: grid; gap: 9px; }
.level-card {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 10px;
  align-items: center;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--text);
  background: rgba(41, 58, 89, .78);
  text-align: left;
  cursor: pointer;
  font-weight: 800;
}
.level-card strong { font-size: 1rem; }
.level-card span { color: var(--muted); font-size: .82rem; font-weight: 800; }
.level-card.active {
  border-color: rgba(255, 209, 102, .8);
  color: #151d2c;
  background: var(--gold);
  box-shadow: 0 12px 30px rgba(255, 209, 102, .16);
}
.level-card.active span { color: rgba(21, 29, 44, .7); }

.tool-box {
  display: grid;
  gap: 9px;
  color: var(--muted);
  font-weight: 900;
}
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.tool-button,
.ghost-button,
.primary-button {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px 12px;
  cursor: pointer;
  font-weight: 900;
}
.tool-button,
.ghost-button {
  color: var(--text);
  background: rgba(41, 58, 89, .9);
}
.tool-button.active,
.primary-button {
  border-color: transparent;
  color: #151d2c;
  background: var(--gold);
}
.ghost-button:hover,
.tool-button:hover,
.level-card:hover { transform: translateY(-1px); }

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: auto;
}
.metrics div {
  min-width: 0;
  padding: 11px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(17, 24, 39, .42);
}
.metrics strong { display: block; color: var(--gold); font-size: 1.35rem; line-height: 1; }
.metrics span { color: var(--muted); font-size: .76rem; font-weight: 800; }

.play-stage {
  min-width: 0;
  padding: 16px;
}
.stage-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 14px;
  margin-bottom: 14px;
}
.action-row { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }

.board-frame {
  display: grid;
  justify-content: center;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(17, 24, 39, .42);
  padding: clamp(12px, 3vw, 28px);
}
.board-frame.complete {
  border-color: rgba(255, 209, 102, .72);
  box-shadow: 0 0 0 4px rgba(255, 209, 102, .12), 0 20px 60px rgba(255, 209, 102, .14);
  animation: completeGlow 1s ease both;
}

.nonogram-board {
  display: grid;
  grid-template-columns: var(--clue-space) repeat(var(--size), var(--cell));
  grid-template-rows: var(--clue-space) repeat(var(--size), var(--cell));
  gap: 2px;
  width: max-content;
}

.corner,
.clue,
.pixel {
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 8px;
}
.corner { background: rgba(41, 58, 89, .9); }
.clue {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  background: rgba(255, 209, 102, .14);
  color: var(--gold);
  font-weight: 950;
  line-height: 1;
  text-align: center;
}
.clue.col { flex-direction: column; }
.clue.row { padding-inline: 8px; }
.clue.solved { background: rgba(128, 240, 176, .18); color: var(--mint); }

.pixel {
  position: relative;
  width: var(--cell);
  height: var(--cell);
  background: rgba(248, 251, 255, .95);
  cursor: pointer;
  transition: transform .12s ease, background .12s ease;
}
.pixel:hover { transform: scale(1.06); z-index: 2; }
.pixel.filled { background: var(--panel2); border-color: var(--panel2); }
.board-frame.complete .pixel.filled {
  animation: cellWin .62s ease both;
}
.pixel.cross::before,
.pixel.cross::after {
  content: "";
  position: absolute;
  top: 48%;
  left: 18%;
  width: 64%;
  height: 3px;
  border-radius: 99px;
  background: var(--pink);
}
.pixel.cross::before { transform: rotate(45deg); }
.pixel.cross::after { transform: rotate(-45deg); }
.pixel.error { outline: 3px solid var(--pink); outline-offset: -3px; }
.pixel.hint { animation: glow 1s ease-in-out 3; }

.message {
  min-height: 50px;
  margin-top: 12px;
  border: 1px solid rgba(255, 209, 102, .22);
  border-radius: 14px;
  background: rgba(255, 209, 102, .1);
  padding: 13px;
  color: var(--text);
  font-weight: 850;
  line-height: 1.55;
}

.complete-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  place-items: center;
  padding: 18px;
  background: rgba(5, 8, 14, .7);
  backdrop-filter: blur(8px);
}
.complete-modal.open { display: grid; }
.complete-panel {
  position: relative;
  width: min(500px, 100%);
  padding: 30px 24px 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 24px;
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 209, 102, .24), transparent 42%),
    rgba(29, 42, 64, .98);
  box-shadow: 0 30px 100px rgba(0, 0, 0, .38);
  text-align: center;
  animation: modalPop .3s cubic-bezier(.2, 1.35, .32, 1) both;
}
.complete-burst {
  position: relative;
  width: 118px;
  height: 118px;
  margin: 0 auto 14px;
  display: grid;
  place-items: center;
}
.complete-burst span {
  position: relative;
  z-index: 2;
  width: 86px;
  height: 86px;
  display: grid;
  place-items: center;
  border: 6px solid rgba(255, 255, 255, .88);
  border-radius: 28px;
  color: #151d2c;
  background: var(--gold);
  box-shadow: 0 18px 38px rgba(255, 209, 102, .26);
  font-size: 48px;
  font-weight: 950;
  transform: rotate(-5deg);
  animation: checkPop .5s .08s cubic-bezier(.2, 1.35, .32, 1) both;
}
.complete-burst i {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 24px;
  border-radius: 999px;
  background: var(--mint);
  transform-origin: 50% 58px;
  animation: confettiPop .72s .12s ease both;
}
.complete-burst i:nth-child(2) { transform: translate(-50%, -50%) rotate(0deg); background: var(--gold); }
.complete-burst i:nth-child(3) { transform: translate(-50%, -50%) rotate(60deg); background: var(--mint); }
.complete-burst i:nth-child(4) { transform: translate(-50%, -50%) rotate(120deg); background: var(--pink); }
.complete-burst i:nth-child(5) { transform: translate(-50%, -50%) rotate(180deg); background: var(--gold); }
.complete-burst i:nth-child(6) { transform: translate(-50%, -50%) rotate(240deg); background: var(--mint); }
.complete-burst i:nth-child(7) { transform: translate(-50%, -50%) rotate(300deg); background: var(--pink); }
.complete-panel p:not(.eyebrow) {
  max-width: 380px;
  margin: 0 auto 20px;
  color: var(--muted);
  font-weight: 800;
}
.complete-actions {
  display: grid;
  gap: 10px;
}
.complete-actions .primary-button,
.complete-actions .secondary-button {
  min-height: 54px;
  font-size: 16px;
}

@keyframes glow {
  50% { box-shadow: 0 0 0 7px rgba(255, 209, 102, .42); }
}

@keyframes modalPop {
  from { opacity: 0; transform: translateY(12px) scale(.96); }
}

@keyframes checkPop {
  from { opacity: 0; transform: scale(.58) rotate(-14deg); }
}

@keyframes confettiPop {
  0% { opacity: 0; height: 0; }
  40% { opacity: 1; height: 26px; }
  100% { opacity: .85; height: 18px; }
}

@keyframes completeGlow {
  0% { transform: scale(.992); }
  55% { transform: scale(1.006); }
  100% { transform: scale(1); }
}

@keyframes cellWin {
  0% { transform: scale(.92); }
  55% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

@media (max-width: 900px) {
  .game-layout { grid-template-columns: 1fr; }
  .stage-head { align-items: flex-start; flex-direction: column; }
  .action-row { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .app-shell { padding-inline: 16px; }
  .topbar { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .brand strong { font-size: 17px; }
  .title-block { text-align: left; }
  main { min-height: auto; }
  .welcome { padding-top: 18px; }
  .hero-icons span { width: 72px; height: 72px; font-size: 34px; }
  .hero-icons span:nth-child(2) { width: 86px; height: 86px; }
  .tool-grid,
  .metrics { grid-template-columns: 1fr; }
  .action-row { display: grid; grid-template-columns: 1fr; width: 100%; }
  .board-frame { justify-content: start; padding: 10px; }
  footer { flex-direction: column; text-align: center; }
}