:root {
  color-scheme: dark;
  --bg: #070814;
  --panel: rgba(18, 18, 42, .92);
  --cyan: #09d9ff;
  --pink: #ff3f78;
  --lime: #7cf21f;
  --yellow: #ffc81a;
  --purple: #8b5cff;
  --gap: clamp(6px, 1.7vw, 10px);
  --board-size: min(78vw, 430px, 52vh);
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 15% 20%, rgba(130, 50, 255, .17), transparent 30%),
    radial-gradient(circle at 85% 75%, rgba(0, 222, 255, .13), transparent 34%),
    #05060f;
  color: #f7f8ff;
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", system-ui, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

button { font: inherit; }
button:focus-visible, .board:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }

#promo{min-height:50px;text-align:center;}

.app-shell {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(10px, 2vw, 22px);
}

.ad-space {
  width: min(320px, 100%);
  height: 50px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px dashed rgba(153, 155, 190, .22);
  border-radius: 10px;
  color: #6f7192;
  background: rgba(13, 14, 31, .55);
}

.ad-testing-label {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .8px;
  text-transform: uppercase;
}

@media (min-width: 500px) {
  .ad-space { width: 468px; height: 60px; }
}

@media (min-width: 800px) {
  .ad-space { width: 728px; height: 90px; }
}

.game-card {
  position: relative;
  isolation: isolate;
  width: min(100%, 600px);
  min-height: min(920px, calc(100svh - 20px));
  overflow: hidden;
  overflow: clip;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: clamp(14px, 3vw, 24px) clamp(12px, 3vw, 26px) 18px;
  border: 1px solid rgba(130, 122, 255, .25);
  border-radius: 30px;
  background:
    linear-gradient(160deg, rgba(35, 28, 77, .8), rgba(9, 10, 27, .96) 48%),
    var(--panel);
  box-shadow: 0 30px 90px #000, inset 0 1px rgba(255,255,255,.08);
}

.game-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: .22;
  background-image: radial-gradient(rgba(255,255,255,.7) .7px, transparent .7px);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, #000, transparent 70%);
}

.ambient { position: absolute; width: 240px; height: 240px; border-radius: 50%; filter: blur(55px); z-index: -1; opacity: .18; }
.ambient-one { background: #a33bff; top: -120px; left: -80px; }
.ambient-two { background: #00d9ff; bottom: -110px; right: -90px; }

.topbar { width: 100%; display: grid; grid-template-columns: 44px 1fr 44px; align-items: center; }
.brand { text-align: center; line-height: 1; }
.brand-word { display: flex; justify-content: center; filter: drop-shadow(0 7px 0 #111329) drop-shadow(0 0 13px rgba(72, 206, 255, .32)); }
.brand-word i { font-size: clamp(24px, 6vw, 38px); font-weight: 900; font-style: normal; letter-spacing: -3px; -webkit-text-stroke: 1px rgba(255,255,255,.4); text-shadow: inset 0 2px #fff; }
.brand-word i:nth-child(4n+1) { color: var(--pink); }
.brand-word i:nth-child(4n+2) { color: var(--yellow); }
.brand-word i:nth-child(4n+3) { color: var(--cyan); }
.brand-word i:nth-child(4n) { color: var(--lime); }
.brand-tag { display: block; margin-top: 9px; color: #aaa7d2; font-size: 9px; font-weight: 900; letter-spacing: 2px; text-transform: uppercase; }

.icon-button, .close-button {
  width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.12); border-radius: 14px;
  display: grid; place-items: center; color: #d9dbf5; background: rgba(255,255,255,.055); cursor: pointer;
  box-shadow: inset 0 1px rgba(255,255,255,.06); transition: .2s ease;
}
.icon-button:hover { background: rgba(255,255,255,.11); transform: translateY(-2px); }
.icon-button svg { width: 21px; height: 21px; fill: currentColor; }
.sound-off { display: none; }
.muted .sound-on { display: none; }
.muted .sound-off { display: block; }

.stats {
  width: min(100%, 480px);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1.18fr;
  gap: 8px;
  margin: clamp(16px, 3vh, 25px) auto 12px;
}
.stat, .next-stat {
  min-width: 0; min-height: 58px; border: 1px solid rgba(255,255,255,.085); border-radius: 15px;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  background: rgba(6, 7, 20, .56); box-shadow: inset 0 1px rgba(255,255,255,.04);
}
.stat-best { border-color: rgba(255, 202, 35, .22); }
.stat span, .next-stat > span { color: #8f91b5; font-size: 9px; font-weight: 900; letter-spacing: 1.1px; text-transform: uppercase; }
.stat strong { max-width: 100%; overflow: hidden; text-overflow: ellipsis; font-size: clamp(16px, 4.5vw, 22px); font-weight: 900; line-height: 1.15; }
.stat-best strong { color: #ffd23c; }
.next-stat { flex-direction: row; gap: 9px; }
.next-block { width: 28px; aspect-ratio: 1; border-radius: 8px; box-shadow: inset 0 3px rgba(255,255,255,.46), inset 0 -4px rgba(0,0,0,.23), 0 0 13px currentColor; }

.combo-banner {
  position: absolute;
  z-index: 5;
  top: -12px;
  left: 50%;
  min-width: 104px;
  padding: 6px 13px 5px;
  border: 1px solid rgba(255, 231, 90, .45);
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  color: #ffe75a;
  background: rgba(8, 9, 25, .94);
  box-shadow: 0 5px 18px rgba(0,0,0,.48), 0 0 14px rgba(255,211,35,.14);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 1px;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
  transform: translateX(-50%) translateY(5px) scale(.92);
  transition: opacity .2s ease, transform .24s cubic-bezier(.2,1.4,.4,1);
}
.combo-banner.show { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }

.board-wrap { position: relative; padding: 9px; border-radius: 25px; background: linear-gradient(135deg, #663cff, #16caff 45%, #ff45a0); box-shadow: 0 0 24px rgba(63, 127, 255, .35); }
.board {
  position: relative; width: var(--board-size); aspect-ratio: 1; overflow: hidden; touch-action: none;
  border-radius: 18px; background: #070917; box-shadow: inset 0 0 35px #000, 0 0 0 2px #0e1231;
}
.grid-cells { position: absolute; inset: var(--gap); display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.grid-cells::before { content: ""; grid-column: 1 / -1; grid-row: 1 / -1; background-image: radial-gradient(circle, rgba(109, 112, 164, .11), rgba(24, 25, 54, .34)); border-radius: 11px; }
.grid-cells { background: repeating-linear-gradient(90deg, transparent 0 calc(25% - var(--gap) * .75), rgba(91,94,142,.25) calc(25% - var(--gap) * .75) calc(25% - 1px), transparent calc(25% - 1px) 25%), repeating-linear-gradient(0deg, transparent 0 calc(25% - var(--gap) * .75), rgba(91,94,142,.25) calc(25% - var(--gap) * .75) calc(25% - 1px), transparent calc(25% - 1px) 25%); border-radius: 11px; }
.tile-layer { position: absolute; inset: var(--gap); }
.board-shine { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(135deg, rgba(255,255,255,.08), transparent 20%, transparent 70%, rgba(71,36,255,.06)); }

.tile {
  --x: 0; --y: 0; --color: var(--cyan);
  position: absolute;
  left: calc(var(--x) * 25% + var(--gap) * .375);
  top: calc(var(--y) * 25% + var(--gap) * .375);
  width: calc(25% - var(--gap) * .75);
  height: calc(25% - var(--gap) * .75);
  border: 1px solid rgba(255,255,255,.42);
  border-radius: clamp(9px, 2.8vw, 16px);
  display: grid; place-items: center;
  color: #fff; background: var(--color);
  font-size: clamp(20px, 7vw, 39px); font-weight: 900;
  text-shadow: 0 2px 2px rgba(0,0,0,.28);
  box-shadow: inset 0 5px 7px rgba(255,255,255,.42), inset 0 -7px 9px rgba(0,0,0,.3), 0 6px 0 color-mix(in srgb, var(--color), #000 42%), 0 0 16px color-mix(in srgb, var(--color), transparent 48%);
  transition: left .17s cubic-bezier(.2,.8,.2,1), top .17s cubic-bezier(.2,.8,.2,1), transform .18s ease, opacity .16s ease;
}
.tile::before { content: ""; position: absolute; inset: 7% 9% auto; height: 24%; border-radius: 50%; background: linear-gradient(rgba(255,255,255,.5), transparent); opacity: .6; }
.tile.new { animation: pop-in .23s cubic-bezier(.2,1.5,.4,1); }
.tile.merged { animation: merge-pop .3s cubic-bezier(.2,1.7,.3,1); }
.tile.color-cyan, .tile.color-lime {
  color: #11162a;
  text-shadow: 0 1px 0 rgba(255,255,255,.45), 0 2px 2px rgba(255,255,255,.15);
}
.tile.color-pink {
  color: #fff;
  text-shadow: 0 2px 2px rgba(74,0,25,.45);
}
.tile.bonus {
  --color: #ff791f;
  color: #fff;
  border-color: #ffd19d;
  background: linear-gradient(145deg, #ffad35, #ff6a18 56%, #d9360f);
  text-shadow: 0 2px 2px rgba(92,24,0,.62), 0 0 8px rgba(255,255,255,.22);
  box-shadow: inset 0 5px 7px rgba(255,255,255,.52), inset 0 -8px 10px rgba(104,20,0,.32), 0 6px 0 #9f2a0d, 0 0 25px rgba(255,105,23,.76);
}
.tile.bonus-tier-2 {
  --color: #ff941f;
  background: linear-gradient(145deg, #ffc34d, #ff8318 55%, #ee4d0d);
  box-shadow: inset 0 5px 7px rgba(255,255,255,.57), inset 0 -8px 10px rgba(104,20,0,.27), 0 6px 0 #b4390a, 0 0 28px rgba(255,137,22,.88);
}
.tile.bonus-tier-3 {
  --color: #ffb51f;
  background: linear-gradient(145deg, #ffe765, #ffad16 52%, #ff6710);
  box-shadow: inset 0 5px 8px rgba(255,255,255,.64), inset 0 -8px 10px rgba(119,38,0,.22), 0 6px 0 #c84a0b, 0 0 32px rgba(255,180,24,.98);
}
.color-cyan { --color: var(--cyan); color: var(--cyan); background-color: var(--cyan); }
.color-pink { --color: var(--pink); color: var(--pink); background-color: var(--pink); }
.color-lime { --color: var(--lime); color: var(--lime); background-color: var(--lime); }

@keyframes pop-in { from { opacity: 0; transform: scale(.25) rotate(-9deg); } to { opacity: 1; transform: scale(1); } }
@keyframes merge-pop { 0%,100% { transform: scale(1); } 50% { transform: scale(1.16); filter: brightness(1.35); } }

.controls { display: grid; grid-template-areas: ". up ." "left down right"; gap: 7px; margin-top: clamp(13px, 2.5vh, 22px); }
.move-up { grid-area: up; } .move-left { grid-area: left; } .move-down { grid-area: down; } .move-right { grid-area: right; }
.move-button { width: 48px; height: 40px; border: 1px solid rgba(255,255,255,.13); border-radius: 13px; color: #dfe3ff; background: linear-gradient(rgba(255,255,255,.09), rgba(255,255,255,.035)); box-shadow: 0 4px 0 #070817; cursor: pointer; transition: .12s; }
.move-button:hover { border-color: rgba(37,215,255,.45); background: rgba(37,215,255,.12); }
.move-button:active { transform: translateY(3px); box-shadow: 0 1px 0 #070817; }
.move-button span { font-size: 20px; font-weight: 900; }
.move-hint { margin: 10px 0 5px; color: #8587aa; font-size: 10px; font-weight: 800; }
.restart-link, .text-button { border: 0; color: #aeb0d0; background: transparent; cursor: pointer; font-weight: 800; }
.restart-link { display: flex; align-items: center; gap: 7px; margin-top: auto; padding: 9px 12px; font-size: 11px; }
.restart-link:hover, .text-button:hover { color: #fff; }
.restart-link svg { width: 14px; fill: currentColor; }

.modal {
  position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; padding: 18px;
  background: rgba(2, 3, 12, .82); backdrop-filter: blur(14px);
  opacity: 0; visibility: hidden; transition: .25s ease;
}
.modal.open { opacity: 1; visibility: visible; }
.modal-card {
  position: relative; width: min(100%, 430px); max-height: calc(100svh - 28px); overflow: auto;
  padding: clamp(26px, 7vw, 40px); border: 1px solid rgba(136,124,255,.32); border-radius: 28px;
  text-align: center; background: radial-gradient(circle at 50% 0, rgba(107,61,255,.24), transparent 42%), #101126;
  box-shadow: 0 25px 90px #000, inset 0 1px rgba(255,255,255,.09);
  transform: translateY(15px) scale(.97); transition: .28s ease;
}
.modal.open .modal-card { transform: none; }
.eyebrow { margin: 0 0 8px; color: #49dfff !important; font-size: 10px; font-weight: 900; letter-spacing: 2px; text-transform: uppercase; }
.intro-card h1 { margin: 10px 0 18px; line-height: 1; }
.intro-logo { display: flex; justify-content: center; filter: drop-shadow(0 6px 0 #08091a) drop-shadow(0 0 16px rgba(72,206,255,.28)); }
.intro-logo i { font-size: clamp(36px, 10.2vw, 58px); font-weight: 900; font-style: normal; letter-spacing: -4px; -webkit-text-stroke: 1px rgba(255,255,255,.35); }
.intro-logo i:nth-child(4n+1) { color: var(--pink); }
.intro-logo i:nth-child(4n+2) { color: var(--yellow); }
.intro-logo i:nth-child(4n+3) { color: var(--cyan); }
.intro-logo i:nth-child(4n) { color: var(--lime); }
.intro-card > p:not(.eyebrow) { max-width: 310px; margin: 0 auto 25px; color: #afb0cb; font-size: 14px; line-height: 1.55; }
.intro-card > .eyebrow { margin-top: 6px; }
.mini-blocks { height: 62px; margin-bottom: 8px; display: flex; justify-content: center; align-items: center; gap: 7px; }
.mini-blocks i { width: 34px; height: 34px; border-radius: 8px; background: var(--pink); box-shadow: inset 0 4px rgba(255,255,255,.4), 0 5px 0 #a31643, 0 0 15px rgba(255,63,120,.45); transform: rotate(-8deg); }
.mini-blocks i:nth-child(2) { background: var(--cyan); box-shadow: inset 0 4px rgba(255,255,255,.4), 0 5px 0 #087499, 0 0 15px rgba(9,217,255,.45); transform: translateY(-6px); }
.mini-blocks i:nth-child(3) { background: var(--lime); box-shadow: inset 0 4px rgba(255,255,255,.4), 0 5px 0 #3c8c16, 0 0 15px rgba(124,242,31,.4); transform: rotate(8deg); }
.primary-button { width: 100%; min-height: 54px; border: 0; border-radius: 16px; color: #06101a; background: linear-gradient(100deg, #22e6ff, #7eff39); font-weight: 900; font-size: 15px; cursor: pointer; box-shadow: 0 7px 0 #087f83, 0 0 23px rgba(38,226,218,.23); transition: .14s; }
.primary-button:hover { filter: brightness(1.1); transform: translateY(-2px); }
.primary-button:active { transform: translateY(5px); box-shadow: 0 2px 0 #087f83; }
.primary-button span { margin-left: 7px; }
.text-button { margin-top: 17px; font-size: 12px; text-decoration: underline; text-underline-offset: 4px; }
.close-button { position: absolute; top: 16px; right: 16px; font-size: 25px; line-height: 1; }
.help-card { text-align: left; }
.help-card h2, .result-card h2 { margin: 0 0 22px; font-size: clamp(30px, 9vw, 44px); letter-spacing: -2px; }
.steps { list-style: none; margin: 0 0 19px; padding: 0; }
.steps li { display: grid; grid-template-columns: 40px 1fr; gap: 13px; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.steps li > span { color: #705eff; font-size: 18px; font-weight: 900; }
.steps strong { font-size: 14px; }
.steps p { margin: 3px 0 0; color: #999bb9; font-size: 12px; line-height: 1.4; }
.tip { display: flex; gap: 9px; align-items: center; margin: 0 0 22px; padding: 12px; border: 1px solid rgba(255,218,56,.2); border-radius: 13px; color: #d8cc84; background: rgba(255,218,56,.06); font-size: 11px; font-weight: 800; }
.tip span { color: #ffe22f; }
.result-burst { width: 70px; height: 70px; display: grid; place-items: center; margin: 0 auto 18px; border-radius: 21px; color: #fff; background: linear-gradient(145deg, #a270ff, #285dff); font-size: 36px; box-shadow: 0 7px 0 #1b279c, 0 0 30px rgba(80,97,255,.65); }
.result-card > p:not(.eyebrow) { margin: -12px 0 22px; color: #a7a9c5; }
.result-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; margin-bottom: 25px; }
.result-stats div { padding: 13px 5px; border: 1px solid rgba(255,255,255,.08); border-radius: 13px; background: rgba(0,0,0,.18); }
.result-stats span { display: block; color: #8486a7; font-size: 8px; font-weight: 900; text-transform: uppercase; letter-spacing: .7px; }
.result-stats strong { display: block; margin-top: 4px; font-size: 19px; }
.toast { position: fixed; z-index: 30; left: 50%; bottom: 24px; transform: translate(-50%, 20px); padding: 10px 17px; border-radius: 50px; color: #fff; background: #252744; box-shadow: 0 8px 30px #000; font-size: 12px; font-weight: 800; opacity: 0; pointer-events: none; transition: .25s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-height: 760px) and (min-width: 420px) {
  :root { --board-size: min(48vh, 390px); }
  .game-card { min-height: calc(100svh - 16px); }
  .stats { margin-top: 12px; }
  .controls { margin-top: 12px; grid-template-areas: "left up down right"; }
  .move-hint { margin-top: 7px; }
}

@media (max-width: 420px) {
  :root { --board-size: min(88vw, 54vh); }
  .app-shell { justify-content: flex-start; gap: 12px; padding: 0 0 12px; }
  .game-card { min-height: 100svh; border: 0; border-radius: 0; padding: 11px 10px max(11px, env(safe-area-inset-bottom)); }
  .topbar { grid-template-columns: 40px 1fr 40px; }
  .icon-button { width: 38px; height: 38px; border-radius: 12px; }
  .stats { margin: 12px 0 8px; gap: 5px; }
  .stat, .next-stat { min-height: 49px; border-radius: 12px; }
  .next-stat { gap: 5px; }
  .next-block { width: 22px; border-radius: 6px; }
  .board-wrap { padding: 6px; border-radius: 19px; }
  .board { border-radius: 14px; }
  .controls { margin-top: 10px; grid-template-areas: "left up down right"; }
  .move-button { width: 45px; height: 37px; }
  .move-hint { margin: 8px 0 0; }
  .restart-link { padding: 7px 10px; }
}

@media (max-width: 340px) {
  :root { --board-size: min(91vw, 52vh); --gap: 5px; }
  .brand-tag { display: none; }
  .brand-word i { font-size: 23px; }
  .stats { margin-top: 9px; }
  .move-hint { font-size: 9px; }
  .modal { padding: 10px; }
  .modal-card { padding: 25px 20px; border-radius: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}