/* ==================== MERGE 2048 GAME ==================== */

.merge-game {
  padding: clamp(24px, 4vh, 46px) 0;
}

.merge-game__layout {
  display: grid;
  grid-template-columns: minmax(240px, 310px) minmax(420px, 600px);
  align-items: center;
  justify-content: space-between;
  gap: clamp(36px, 7vw, 112px);
}

.merge-game__sidebar {
  display: flex;
  flex-direction: column;
}

.merge-game__heading h1 {
  margin-top: 9px;
}

.merge-game__heading > p:last-child {
  max-width: 31ch;
  margin-top: 14px;
  color: var(--color-text-muted);
  font-size: 0.94rem;
}

.merge-goal {
  display: grid;
  gap: 8px;
  margin-top: 30px;
  padding-block: 18px;
  border-block: 1px solid var(--color-border);
}

.merge-goal__label,
.merge-goal small {
  color: var(--color-text-muted);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.merge-goal strong {
  font-size: 0.92rem;
  letter-spacing: -0.015em;
}

.merge-goal__progress {
  overflow: hidden;
  height: 5px;
  margin-top: 3px;
  background: var(--color-surface-raised);
}

.merge-goal__progress i {
  display: block;
  width: 10%;
  height: 100%;
  background: var(--color-brand);
  transition: width 180ms ease;
}

.merge-game__tip {
  display: flex;
  gap: 11px;
  margin-top: 20px;
  color: var(--color-text-muted);
  font-size: 0.78rem;
}

.merge-game__tip span {
  height: fit-content;
  padding: 3px 6px;
  border-radius: 4px;
  background: var(--color-surface-raised);
  color: var(--color-text);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.merge-game__tip p {
  line-height: 1.45;
}

.merge-game__new {
  width: 100%;
  margin-top: 23px;
}

.merge-game__keyboard-note {
  margin-top: 13px;
  color: var(--color-text-muted);
  font-size: 0.71rem;
  text-align: center;
}

.merge-play {
  min-width: 0;
}

.merge-hud {
  display: flex;
  min-height: 58px;
  align-items: center;
  gap: clamp(22px, 4vw, 38px);
  padding: 0 2px 10px;
}

.merge-hud__item {
  position: relative;
  display: grid;
  min-width: 60px;
  gap: 2px;
}

.merge-hud__item span {
  color: var(--color-text-muted);
  font-size: 0.66rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.merge-hud__item strong {
  font-size: 1.22rem;
  font-variant-numeric: tabular-nums;
}

.merge-hud__item b {
  position: absolute;
  top: 0;
  left: 42px;
  color: var(--color-brand-dark);
  font-size: 0.72rem;
  opacity: 0;
}

.merge-hud__item b.is-visible {
  animation: score-pop 480ms ease;
}

.merge-hud__status {
  margin-left: auto;
  color: var(--color-text-muted);
  font-size: 0.72rem;
}

.merge-hud__controls {
  display: flex;
  gap: 2px;
}

.merge-control {
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.merge-control__play {
  display: none !important;
}

.merge-control.is-paused .merge-control__pause {
  display: none;
}

.merge-control.is-paused .merge-control__play {
  display: block !important;
}

.merge-board {
  --board-gap: 11px;
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  padding: var(--board-gap);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  background: #dfe8e4;
  touch-action: none;
  user-select: none;
}

[data-theme="dark"] .merge-board {
  background: #22302b;
}

[data-theme="dark"] .merge-game .eyebrow,
[data-theme="dark"] .merge-help .eyebrow,
[data-theme="dark"] .merge-restart .eyebrow,
[data-theme="dark"] .merge-message__mark,
[data-theme="dark"] .merge-help__steps li > span {
  color: #6ee7b7;
}

.merge-board__cells,
.merge-board__tiles {
  position: absolute;
  inset: var(--board-gap);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: var(--board-gap);
}

.merge-board__cells i {
  border-radius: var(--radius-small);
  background: rgba(255, 255, 255, 0.56);
}

[data-theme="dark"] .merge-board__cells i {
  background: rgba(255, 255, 255, 0.055);
}

.merge-tile {
  display: grid;
  place-items: center;
  border-radius: var(--radius-small);
  background: var(--tile-background, #edf2f0);
  color: var(--tile-color, #163028);
  font-size: clamp(1.35rem, 5.6vw, 2.8rem);
  font-weight: 850;
  letter-spacing: -0.055em;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.merge-tile[data-digits="3"] {
  font-size: clamp(1.24rem, 5vw, 2.5rem);
}

.merge-tile[data-digits="4"] {
  font-size: clamp(1.02rem, 4.2vw, 2.12rem);
}

.merge-tile[data-digits="5"] {
  font-size: clamp(0.88rem, 3.5vw, 1.72rem);
}

.merge-tile[data-value="2"] { --tile-background: #f7faf9; }
.merge-tile[data-value="4"] { --tile-background: #e7f1ed; }
.merge-tile[data-value="8"] { --tile-background: #c9ecdf; --tile-color: #07563f; }
.merge-tile[data-value="16"] { --tile-background: #9ee0c8; --tile-color: #064936; }
.merge-tile[data-value="32"] { --tile-background: #6ed2ae; --tile-color: #053f2f; }
.merge-tile[data-value="64"] { --tile-background: #34c796; --tile-color: #042f24; }
.merge-tile[data-value="128"] { --tile-background: #10a976; --tile-color: #ffffff; }
.merge-tile[data-value="256"] { --tile-background: #07835f; --tile-color: #ffffff; }
.merge-tile[data-value="512"] { --tile-background: #086249; --tile-color: #ffffff; }
.merge-tile[data-value="1024"] { --tile-background: #254d40; --tile-color: #ffffff; }
.merge-tile[data-value="2048"] { --tile-background: #d39a09; --tile-color: #161006; }
.merge-tile[data-value="4096"],
.merge-tile[data-value="8192"] { --tile-background: #9a6f07; --tile-color: #ffffff; }

[data-theme="dark"] .merge-tile[data-value="2"] { --tile-background: #33443e; --tile-color: #f4faf7; }
[data-theme="dark"] .merge-tile[data-value="4"] { --tile-background: #3d514a; --tile-color: #f4faf7; }

.merge-tile.is-new {
  animation: tile-enter 130ms ease-out;
}

.merge-tile.is-merged {
  animation: tile-merge 170ms ease-out;
}

.merge-message {
  position: absolute;
  z-index: 4;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 28px;
  background: rgba(247, 250, 249, 0.93);
  text-align: center;
}

[data-theme="dark"] .merge-message {
  background: rgba(8, 12, 11, 0.93);
}

.merge-message__mark {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 50%;
  background: var(--color-brand-soft);
  color: var(--color-brand-dark);
  font-size: 1.18rem;
  font-weight: 900;
}

.merge-message .eyebrow {
  margin-top: 19px;
}

.merge-message h2 {
  margin-top: 7px;
  font-size: clamp(1.35rem, 4vw, 1.9rem);
}

.merge-message > p:last-of-type {
  max-width: 36ch;
  margin-top: 8px;
  color: var(--color-text-muted);
  font-size: 0.86rem;
}

.merge-message__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 23px;
}

.merge-message__actions .button {
  min-width: 120px;
}

.sr-announcement {
  position: absolute;
  overflow: hidden;
  width: 1px;
  height: 1px;
  padding: 0;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.merge-dpad {
  display: none;
}

.merge-help__steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.merge-help__steps li {
  display: grid;
  grid-template-columns: 30px 1fr;
  align-items: start;
  gap: 12px;
}

.merge-help__steps li > span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 50%;
  background: var(--color-brand-soft);
  color: var(--color-brand-dark);
  font-size: 0.76rem;
  font-weight: 850;
}

.merge-help__steps p {
  padding-top: 4px;
  font-size: 0.86rem;
  line-height: 1.5;
}

.merge-help__steps strong {
  color: var(--color-text);
}

.merge-help__note {
  margin-top: 18px;
  padding-top: 17px;
  border-top: 1px solid var(--color-border);
  font-size: 0.78rem;
}

.merge-restart__actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 0 24px 24px;
}

@keyframes tile-enter {
  from { opacity: 0; transform: scale(0.82); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes tile-merge {
  50% { transform: scale(1.08); }
}

@keyframes score-pop {
  0% { opacity: 0; transform: translateY(4px); }
  28% { opacity: 1; }
  100% { opacity: 0; transform: translateY(-15px); }
}

/* Merge 2048 responsive */

@media (max-width: 900px) {
  .merge-game__layout {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 27px;
  }

  .merge-game__sidebar {
    display: grid;
    grid-template-columns: 1fr minmax(330px, 1.1fr);
    column-gap: 36px;
  }

  .merge-game__heading {
    grid-row: 1 / span 2;
  }

  .merge-goal {
    margin-top: 0;
  }

  .merge-game__tip {
    grid-column: 2;
  }

  .merge-game__new {
    grid-column: 1;
    grid-row: 3;
  }

  .merge-game__keyboard-note {
    display: none;
  }

  .merge-play {
    width: min(100%, 600px);
    margin-inline: auto;
  }

  .merge-dpad {
    display: grid;
    width: 208px;
    grid-template-columns: repeat(3, 64px);
    grid-template-rows: repeat(2, 58px);
    justify-content: center;
    gap: 8px;
    margin: 17px auto 0;
  }

  .merge-dpad__button,
  .merge-dpad__center {
    display: grid;
    width: 64px;
    height: 58px;
    place-items: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);
    background: var(--color-surface);
  }

  .merge-dpad__button:active {
    background: var(--color-brand-soft);
  }

  .merge-dpad__button svg {
    width: 23px;
    height: 23px;
  }

  .merge-dpad__center {
    color: var(--color-text-muted);
    font-size: 0.7rem;
    font-weight: 850;
  }

  .merge-dpad__button--up { grid-column: 2; grid-row: 1; }
  .merge-dpad__button--left { grid-column: 1; grid-row: 2; }
  .merge-dpad__center { grid-column: 2; grid-row: 2; }
  .merge-dpad__button--right { grid-column: 3; grid-row: 2; }
  .merge-dpad__button--down { grid-column: 2; grid-row: 3; }
  .merge-dpad__button--left svg { transform: rotate(-90deg); }
  .merge-dpad__button--right svg { transform: rotate(90deg); }
  .merge-dpad__button--down svg { transform: rotate(180deg); }
}

@media (max-width: 640px) {
  .merge-game {
    padding: 20px 0 28px;
  }

  .merge-game__layout {
    gap: 20px;
  }

  .merge-game__sidebar {
    display: flex;
  }

  .merge-game__heading h1 {
    font-size: clamp(2rem, 11vw, 2.8rem);
  }

  .merge-game__heading > p:last-child {
    max-width: 36ch;
    margin-top: 10px;
    font-size: 0.86rem;
  }

  .merge-goal,
  .merge-game__tip,
  .merge-game__new {
    display: none;
  }

  .merge-hud {
    gap: 17px;
  }

  .merge-hud__item {
    min-width: 52px;
  }

  .merge-hud__status {
    display: none;
  }

  .merge-hud__controls {
    margin-left: auto;
  }

  .merge-board {
    --board-gap: clamp(7px, 2.4vw, 10px);
  }

  .merge-dpad {
    grid-template-columns: repeat(3, 58px);
    grid-template-rows: repeat(2, 56px);
    width: 190px;
  }

  .merge-dpad__button,
  .merge-dpad__center {
    width: 58px;
    height: 56px;
  }

  .merge-message {
    padding: 20px;
  }

  .merge-message__actions {
    width: 100%;
  }

  .merge-message__actions .button {
    min-width: 0;
    flex: 1;
    padding-inline: 14px;
  }

  .merge-restart__actions {
    grid-template-columns: 1fr;
  }
}

@media (max-height: 760px) and (min-width: 901px) {
  .merge-game {
    padding-block: 18px;
  }

  .merge-board {
    width: min(100%, calc(100vh - 156px));
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .merge-goal__progress i,
  .merge-tile,
  .merge-hud__item b {
    animation: none !important;
    transition: none;
  }
}