:root {
  --bg-night: #10161e;
  --bg-steel: #1f2b36;
  --panel: #f7ecd2;
  --panel-ink: #27190d;
  --board-light: #e6cf9a;
  --board-dark: #ad8450;
  --board-border: #5a3d1f;
  --gold: #e1b24f;
  --red-main: #8f1d1d;
  --red-soft: #d45f5f;
  --blue-main: #1f4b8f;
  --blue-soft: #5d8fd4;
  --forest: #2a6942;
  --shadow: rgba(0, 0, 0, 0.3);
  --cell-size: 64px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Marcellus", serif;
  color: #f7f2e8;
  background: radial-gradient(circle at 20% 10%, #32465b 0%, var(--bg-night) 45%),
    linear-gradient(145deg, #263646, #171f28);
  position: relative;
  overflow-x: hidden;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 1000;
  padding: 10px 12px;
  border-radius: 8px;
  background: #f6e0b7;
  color: #2a1708;
  border: 2px solid #8a6a3d;
  font-family: "Cinzel", serif;
  text-decoration: none;
  font-weight: 700;
}

.skip-link:focus {
  top: 12px;
}

.page-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    radial-gradient(circle at 82% 15%, rgba(241, 206, 137, 0.18), transparent 28%),
    radial-gradient(circle at 17% 77%, rgba(200, 80, 80, 0.14), transparent 25%),
    repeating-linear-gradient(45deg, transparent 0 12px, rgba(255, 255, 255, 0.03) 12px 14px);
}

.app {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 18px 32px;
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
}

.title-wrap {
  text-align: center;
  margin-bottom: 14px;
}

.title-row {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.title-text-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.app-icon {
  width: clamp(144px, 18vw, 276px);
  height: clamp(144px, 18vw, 276px);
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid rgba(241, 210, 150, 0.72);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.34);
}

.title-wrap h1 {
  font-family: "Cinzel", serif;
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0;
  letter-spacing: 0.06em;
  color: #f6ddb0;
  text-shadow: 0 3px 10px rgba(0, 0, 0, 0.45);
}

.subtitle {
  margin: 8px 0 0;
  max-width: 740px;
  color: #e4d5bc;
}

.status-panel {
  background: linear-gradient(180deg, #f7ebce, #edd9b2);
  color: var(--panel-ink);
  border: 2px solid #8a6a3d;
  border-radius: 16px;
  padding: 12px 14px;
  box-shadow: 0 8px 18px var(--shadow);
  position: relative;
  overflow: hidden;
}

.status-panel::before {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  top: 8px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(138, 106, 61, 0.65), transparent);
}

.turn-indicator {
  font-family: "Cinzel", serif;
  font-weight: 800;
  text-align: center;
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.score-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.score-card {
  border-radius: 12px;
  padding: 10px 12px;
  border: 2px solid transparent;
  background: rgba(255, 255, 255, 0.55);
}

.score-card h2 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-family: "Cinzel", serif;
}

.score-card p {
  margin: 2px 0;
}

.red-card {
  border-color: #9f4444;
  box-shadow: inset 0 0 0 1px rgba(159, 68, 68, 0.26);
}

.blue-card {
  border-color: #4269ab;
  box-shadow: inset 0 0 0 1px rgba(66, 105, 171, 0.24);
}

.hint {
  margin: 10px 0 0;
  font-size: 0.92rem;
}

.board-stage {
  margin-top: 6px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}

.board-shell {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: linear-gradient(180deg, rgba(246, 228, 188, 0.16), rgba(120, 82, 35, 0.16));
  border: 2px solid rgba(209, 173, 109, 0.5);
  border-radius: 18px;
  padding: 10px 10px 12px;
  box-shadow: 0 12px 22px rgba(0, 0, 0, 0.28), inset 0 0 0 1px rgba(250, 217, 151, 0.18);
  min-width: max-content;
}

.crest-row {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}

.crest {
  text-align: center;
  font-family: "Cinzel", serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 6px 8px;
  border-radius: 999px;
  border: 1px solid rgba(0, 0, 0, 0.28);
  text-transform: uppercase;
}

.crest-red {
  background: linear-gradient(90deg, rgba(147, 34, 34, 0.72), rgba(212, 95, 95, 0.76));
}

.crest-gold {
  background: linear-gradient(90deg, rgba(167, 118, 48, 0.72), rgba(231, 187, 111, 0.76));
  color: #271706;
}

.crest-blue {
  background: linear-gradient(90deg, rgba(34, 75, 146, 0.72), rgba(93, 143, 212, 0.76));
}

.board-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.board {
  display: grid;
  grid-template-columns: repeat(11, var(--cell-size));
  grid-template-rows: repeat(11, var(--cell-size));
  border: 9px solid var(--board-border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 12px 20px var(--shadow), inset 0 0 0 2px #cca76a;
  position: relative;
}

.board::before,
.board::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.board::before {
  inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.04) 0 2px, transparent 2px 20px);
  mix-blend-mode: soft-light;
}

.board::after {
  inset: 8px;
  border: 2px solid rgba(255, 233, 190, 0.28);
}

.y-labels,
.x-labels {
  display: grid;
  font-family: "Cinzel", serif;
  font-weight: 600;
  color: #f4dfbc;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.y-labels {
  grid-template-rows: repeat(11, var(--cell-size));
  width: 28px;
  align-items: center;
  justify-items: center;
}

.x-labels {
  grid-template-columns: repeat(11, var(--cell-size));
  width: auto;
  justify-items: center;
}

.x-labels.top {
  margin-bottom: 7px;
}

.x-labels.bottom {
  margin-top: 7px;
}

.cell {
  display: grid;
  place-items: center;
  position: relative;
  cursor: pointer;
  transition: filter 120ms ease, transform 120ms ease;
  border: none;
  padding: 0;
  touch-action: manipulation;
}

.cell.light {
  background: var(--board-light);
}

.cell.dark {
  background: var(--board-dark);
}

.cell:hover {
  filter: brightness(1.06);
}

.cell.valid-target {
  outline: 3px solid rgba(67, 176, 106, 0.9);
  outline-offset: -3px;
}

.cell.selected {
  outline: 3px solid rgba(255, 240, 176, 0.95);
  outline-offset: -3px;
}

.cell.computer-last-from::before,
.cell.computer-last-move::before {
  content: "";
  position: absolute;
  inset: 2px;
  border: 4px solid rgba(255, 224, 92, 1);
  border-radius: 9px;
  box-shadow:
    0 0 0 2px rgba(255, 248, 204, 1),
    0 0 20px rgba(255, 214, 63, 0.95),
    0 0 40px rgba(255, 182, 16, 0.9);
  pointer-events: none;
  animation: computer-move-glow 1.05s ease-in-out infinite;
}

@keyframes computer-move-glow {
  0%,
  100% {
    box-shadow:
      0 0 0 2px rgba(255, 246, 186, 0.98),
      0 0 22px rgba(255, 213, 54, 0.92),
      0 0 42px rgba(255, 170, 0, 0.8);
  }
  50% {
    box-shadow:
      0 0 0 2px rgba(255, 251, 220, 1),
      0 0 34px rgba(255, 224, 96, 1),
      0 0 58px rgba(255, 196, 28, 0.98);
  }
}

.tile-icon {
  width: 76%;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: clamp(0.58rem, 1.4vw, 0.78rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #f9f6ee;
  border: 2px solid rgba(0, 0, 0, 0.3);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
  text-align: center;
  padding: 2px;
}

.tile-icon.forest {
  background: radial-gradient(circle at 30% 25%, #63a37a, #2d6f49);
  border-color: #1e4b32;
}

.tile-icon.mine {
  background: radial-gradient(circle at 24% 22%, #ffe59c, #a4772f);
  border-color: #6f4f1a;
  color: #251507;
}

.tile-icon.mine.captured {
  background: radial-gradient(circle at 24% 22%, #505050, #111111);
  border-color: #000000;
  color: #f5f5f5;
}

.tile-icon.tower.red {
  background: linear-gradient(165deg, #ce6868, #7f1f1f);
}

.tile-icon.tower.blue {
  background: linear-gradient(165deg, #80a7e4, #214985);
}

.unit {
  width: 82%;
  aspect-ratio: 1;
  border-radius: 16% 16% 46% 46%;
  position: relative;
  display: grid;
  place-items: center;
  border: 2px solid rgba(0, 0, 0, 0.35);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.36);
  transition: transform 140ms ease;
}

.cell:hover .unit {
  transform: translateY(-2px);
}

.unit::before {
  content: "";
  position: absolute;
  inset: 7% 12% auto;
  height: 38%;
  border-radius: 999px;
  opacity: 0.26;
  background: rgba(255, 255, 255, 0.7);
}

.unit::after {
  content: attr(data-seal);
  position: absolute;
  right: 4px;
  bottom: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.58rem;
  color: #f8f7f1;
  border: 1px solid rgba(0, 0, 0, 0.3);
}

.unit.red {
  background: linear-gradient(180deg, var(--red-soft), var(--red-main));
}

.unit.red::after {
  background: #631212;
}

.unit.blue {
  background: linear-gradient(180deg, var(--blue-soft), var(--blue-main));
}

.unit.blue::after {
  background: #133b72;
}

.unit.commander {
  clip-path: polygon(16% 0, 30% 26%, 44% 0, 58% 26%, 72% 0, 84% 20%, 88% 100%, 12% 100%);
}

.piece-emblem {
  display: block;
  width: 56%;
  height: 56%;
  position: relative;
}

.piece-emblem::before,
.piece-emblem::after {
  content: "";
  position: absolute;
}

.piece-emblem.crown {
  width: 62%;
  height: 58%;
}

.piece-emblem.crown::before {
  inset: 32% 10% 8% 10%;
  background: linear-gradient(180deg, #f7e6bf, #d3a957);
  border: 1px solid rgba(46, 30, 8, 0.45);
  clip-path: polygon(0 28%, 16% 34%, 26% 0, 42% 34%, 50% 10%, 58% 34%, 74% 0, 84% 34%, 100% 28%, 100% 100%, 0 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 235, 189, 0.35);
}

.piece-emblem.crown::after {
  left: 28%;
  right: 28%;
  bottom: 4%;
  height: 16%;
  border-radius: 999px;
  background: rgba(44, 24, 4, 0.32);
}

.piece-emblem.shield {
  width: 52%;
  height: 58%;
}

.piece-emblem.shield::before {
  inset: 6% 8%;
  background: linear-gradient(180deg, rgba(245, 241, 231, 0.9), rgba(203, 183, 142, 0.95));
  border: 1px solid rgba(46, 30, 8, 0.45);
  clip-path: polygon(12% 0, 88% 0, 100% 16%, 100% 58%, 50% 100%, 0 58%, 0 16%);
  box-shadow: inset 0 0 0 1px rgba(255, 248, 228, 0.4);
}

.piece-emblem.shield::after {
  left: 30%;
  right: 30%;
  top: 24%;
  height: 34%;
  background: linear-gradient(180deg, rgba(112, 80, 30, 0.72), rgba(76, 51, 15, 0.8));
  clip-path: polygon(50% 0, 100% 22%, 100% 74%, 50% 100%, 0 74%, 0 22%);
  opacity: 0.72;
}

.controls {
  margin-top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.difficulty-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid rgba(228, 195, 134, 0.5);
  background: rgba(42, 28, 11, 0.35);
}

.difficulty-title {
  font-family: "Cinzel", serif;
  font-size: 0.84rem;
  letter-spacing: 0.04em;
  color: #f3e2bf;
}

.difficulty-btn {
  border: 1px solid rgba(220, 191, 135, 0.65);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: "Cinzel", serif;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #f9e6c2;
  cursor: pointer;
  background: linear-gradient(180deg, rgba(79, 57, 28, 0.76), rgba(55, 38, 18, 0.76));
  min-height: 38px;
}

.difficulty-btn:hover {
  filter: brightness(1.08);
}

.difficulty-btn.active {
  color: #2a1708;
  border-color: rgba(235, 208, 154, 0.9);
  background: linear-gradient(180deg, #f6e0b7, #ddb577);
  box-shadow: 0 0 0 1px rgba(255, 235, 196, 0.4) inset;
}

#restartBtn {
  border: 2px solid #d9c08b;
  background: linear-gradient(180deg, #f5e0b8, #d5b172);
  color: #2c1c0c;
  font-family: "Cinzel", serif;
  font-weight: 700;
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  min-height: 42px;
}

#restartBtn:hover {
  filter: brightness(1.06);
}

.legend {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  color: #f5e9d2;
  justify-content: center;
}

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

.legend-mark {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.38);
}

.legend-mark.forest {
  background: var(--forest);
}

.legend-mark.mine {
  background: var(--gold);
}

.legend-mark.tower.red {
  background: var(--red-main);
}

.legend-mark.tower.blue {
  background: var(--blue-main);
}

.log-wrap {
  margin-top: 14px;
  background: rgba(244, 226, 193, 0.92);
  border: 2px solid #9b7744;
  color: #2b1b0b;
  border-radius: 12px;
  padding: 10px 14px;
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
}

.log-wrap h3 {
  margin: 0;
  font-family: "Cinzel", serif;
}

#log {
  margin: 8px 0 0;
  max-height: 190px;
  overflow: auto;
  padding-left: 20px;
}

#log li {
  margin-bottom: 4px;
}

.rules-wrap {
  margin-top: 10px;
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 14px;
  padding: 14px;
  border: 2px solid rgba(229, 195, 131, 0.62);
  background:
    radial-gradient(circle at 18% 12%, rgba(246, 220, 170, 0.18), transparent 35%),
    radial-gradient(circle at 90% 85%, rgba(72, 107, 166, 0.16), transparent 30%),
    linear-gradient(160deg, rgba(22, 30, 42, 0.92), rgba(17, 24, 34, 0.95));
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.28), inset 0 0 0 1px rgba(250, 221, 168, 0.16);
}

.rules-wrap h3 {
  margin: 0;
  text-align: center;
  font-family: "Cinzel", serif;
  letter-spacing: 0.05em;
  color: #f2dab0;
}

.rules-subtitle {
  margin: 6px 0 12px;
  text-align: center;
  color: #e7d7b8;
}

.rules-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.rule-card {
  border-radius: 10px;
  padding: 10px 12px;
  background: linear-gradient(180deg, rgba(247, 233, 203, 0.95), rgba(236, 215, 176, 0.93));
  border: 1px solid rgba(145, 110, 58, 0.58);
  color: #2c1c0c;
  box-shadow: inset 0 0 0 1px rgba(255, 247, 227, 0.45);
}

.rule-card h4 {
  margin: 0 0 5px;
  font-family: "Cinzel", serif;
  font-size: 0.92rem;
  color: #5b3812;
}

.rule-card p {
  margin: 0;
  line-height: 1.35;
  font-size: 0.94rem;
}

.seo-copy {
  margin-top: 10px;
  max-width: 920px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 12px;
  border: 2px solid rgba(229, 195, 131, 0.5);
  padding: 12px 14px;
  background: rgba(14, 20, 29, 0.82);
  color: #f0e0c2;
}

.seo-copy h3 {
  margin: 0 0 6px;
  font-family: "Cinzel", serif;
  color: #f3ddb1;
}

.seo-copy p {
  margin: 0;
  line-height: 1.45;
}

.site-footer {
  margin-top: 10px;
  text-align: center;
  color: #d9c7a4;
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 820px) {
  .app {
    padding: 14px 10px 24px;
    gap: 12px;
  }

  .score-cards {
    grid-template-columns: 1fr;
  }

  .title-wrap {
    margin-bottom: 8px;
  }

  .subtitle {
    font-size: 0.95rem;
  }

  .board {
    border-width: 7px;
  }

  .y-labels {
    width: 22px;
    font-size: 0.82rem;
  }

  .x-labels {
    font-size: 0.82rem;
  }

  .rules-grid {
    grid-template-columns: 1fr;
  }

  .crest-row {
    gap: 6px;
  }

  .crest {
    font-size: 0.62rem;
    padding: 5px 6px;
    letter-spacing: 0.05em;
  }

  .controls {
    gap: 8px;
  }

  .difficulty-wrap {
    flex-wrap: wrap;
    justify-content: center;
  }

  #log {
    max-height: 160px;
  }
}

@media (max-width: 560px) {
  :root {
    --cell-size: 40px;
  }

  .status-panel {
    padding: 10px;
  }

  .turn-indicator {
    font-size: 1rem;
  }

  .score-card {
    padding: 8px 10px;
  }

  .score-card h2 {
    font-size: 0.9rem;
  }

  .hint {
    font-size: 0.86rem;
  }

  .board-shell {
    border-radius: 14px;
    padding: 8px;
  }

  .controls {
    flex-direction: column;
  }

  .difficulty-wrap {
    width: 100%;
  }

  #restartBtn {
    width: 100%;
    max-width: 320px;
  }

  .legend {
    font-size: 0.88rem;
  }

  .log-wrap,
  .rules-wrap {
    padding: 10px;
  }
}

/* Mobile and tablet compatibility layer */

:root {
  --section-max: 980px;
  --board-label-size: 24px;
  --board-gutter: 6px;
  --piece-size: clamp(14px, calc(var(--cell-size) * 0.8), 54px);
  --piece-border: clamp(1px, calc(var(--cell-size) * 0.055), 2px);
  --piece-seal-size: clamp(10px, calc(var(--cell-size) * 0.3), 16px);
  --piece-seal-font-size: clamp(7px, calc(var(--cell-size) * 0.19), 10px);
  --icon-size: clamp(13px, calc(var(--cell-size) * 0.76), 50px);
  --icon-font-size: clamp(8px, calc(var(--cell-size) * 0.26), 13px);
}

body {
  min-height: 100dvh;
}

.app {
  width: min(1160px, 100%);
  padding-left: max(12px, env(safe-area-inset-left));
  padding-right: max(12px, env(safe-area-inset-right));
  padding-bottom: max(22px, env(safe-area-inset-bottom));
}

.status-panel,
.board-stage,
.controls,
.log-wrap,
.rules-wrap {
  width: min(var(--section-max), 100%);
  margin-left: auto;
  margin-right: auto;
}

.board-stage {
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-gutter: stable both-edges;
}

.board-shell {
  display: grid;
  justify-items: center;
  row-gap: 0;
  width: fit-content;
  max-width: 100%;
  min-width: 0;
  margin: 0 auto;
}

.crest-row,
.x-labels.top,
.board-row,
.x-labels.bottom {
  justify-self: center;
}

.board-row {
  gap: var(--board-gutter);
}

.x-labels,
.y-labels {
  font-size: clamp(0.64rem, 2vw, 0.95rem);
}

.x-labels {
  width: calc(var(--cell-size) * 11);
}

.y-labels {
  width: var(--board-label-size);
}

.x-labels.top,
.x-labels.bottom {
  margin-left: calc(var(--board-label-size) + var(--board-gutter));
  margin-right: calc(var(--board-label-size) + var(--board-gutter));
}

.unit {
  width: var(--piece-size);
  height: var(--piece-size);
  border-width: var(--piece-border);
  border-radius: 18% 18% 44% 44%;
}

.unit::after {
  left: 50%;
  right: auto;
  transform: translateX(-50%);
  bottom: 3px;
  width: var(--piece-seal-size);
  height: var(--piece-seal-size);
  font-size: var(--piece-seal-font-size);
  font-family: "Cinzel", serif;
  font-weight: 700;
  line-height: 1;
}

.tile-icon {
  width: var(--icon-size);
  height: var(--icon-size);
  border-width: var(--piece-border);
  font-size: var(--icon-font-size);
  font-family: "Cinzel", serif;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.35);
  padding: 0;
}

.piece-emblem.crown {
  width: 64%;
  height: 60%;
}

.piece-emblem.shield {
  width: 56%;
  height: 60%;
}

#restartBtn,
.difficulty-btn {
  min-height: 44px;
}

.controls {
  display: grid;
  grid-template-columns: minmax(190px, 0.9fr) minmax(290px, 1fr) minmax(220px, 1fr);
  align-items: center;
  gap: 10px;
}

#restartBtn {
  width: 100%;
  max-width: 240px;
  justify-self: center;
}

.difficulty-wrap,
.legend {
  justify-self: center;
}

.difficulty-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(229, 195, 131, 0.55);
  background:
    linear-gradient(180deg, rgba(255, 232, 186, 0.16), rgba(58, 39, 18, 0.48)),
    rgba(24, 17, 10, 0.52);
  box-shadow:
    0 8px 16px rgba(0, 0, 0, 0.2),
    inset 0 0 0 1px rgba(255, 239, 205, 0.16);
  backdrop-filter: blur(3px);
  justify-content: center;
}

.difficulty-title {
  color: #f8e6bf;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.difficulty-btn {
  min-width: 84px;
  border-radius: 10px;
  border: 1px solid rgba(228, 195, 137, 0.62);
  background: linear-gradient(180deg, rgba(102, 72, 38, 0.9), rgba(60, 40, 20, 0.92));
  color: #fae7c0;
  font-weight: 800;
  transition: transform 120ms ease, filter 120ms ease, box-shadow 120ms ease, border-color 120ms ease;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.26), inset 0 0 0 1px rgba(255, 230, 180, 0.08);
}

.difficulty-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.07);
}

.difficulty-btn:active {
  transform: translateY(0);
  filter: brightness(0.97);
}

.difficulty-btn:focus-visible {
  outline: 2px solid rgba(246, 216, 158, 0.95);
  outline-offset: 1px;
}

.difficulty-btn.active {
  color: #2b190b;
  border-color: rgba(249, 226, 178, 0.96);
  background: linear-gradient(180deg, #f8e3bc, #e1bc83);
  box-shadow:
    0 3px 10px rgba(0, 0, 0, 0.22),
    inset 0 0 0 1px rgba(255, 247, 228, 0.62);
}

@media (hover: none) {
  .cell:hover,
  .difficulty-btn:hover,
  #restartBtn:hover {
    filter: none;
  }

  .cell:hover .unit {
    transform: none;
  }
}

@media (max-width: 1024px) {
  :root {
    --piece-seal-font-size: clamp(8px, calc(var(--cell-size) * 0.19), 10px);
    --icon-font-size: clamp(8px, calc(var(--cell-size) * 0.26), 12px);
  }

  .controls {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 8px;
  }

  #restartBtn,
  .difficulty-wrap,
  .legend {
    width: min(760px, 100%);
  }

  .difficulty-wrap {
    display: grid;
    grid-template-columns: auto repeat(3, minmax(70px, 1fr));
    align-items: center;
    gap: 6px;
    flex-wrap: nowrap;
  }

  .difficulty-title {
    white-space: nowrap;
  }

  .difficulty-btn {
    min-width: 0;
    width: 100%;
  }
}

@media (max-width: 820px) {
  .app {
    padding-top: 14px;
    gap: 12px;
  }

  .score-cards,
  .rules-grid {
    grid-template-columns: 1fr;
  }

  .board-shell {
    border-radius: 16px;
    padding: 8px;
  }
}

@media (max-width: 560px) {
  .app {
    padding-top: 12px;
  }

  .subtitle {
    font-size: 0.92rem;
  }

  .difficulty-wrap {
    grid-template-columns: auto repeat(3, minmax(56px, 1fr));
    gap: 4px;
    padding: 6px;
  }

  .difficulty-title {
    font-size: 0.74rem;
  }

  .difficulty-btn {
    flex: initial;
    min-width: 0;
    padding: 6px 4px;
    font-size: 0.7rem;
    letter-spacing: 0.02em;
  }

  .legend {
    gap: 8px;
    font-size: 0.86rem;
  }

  .tile-icon {
    font-size: clamp(8px, calc(var(--cell-size) * 0.3), 11px);
  }

  .unit::after {
    font-size: clamp(7px, calc(var(--cell-size) * 0.2), 9px);
  }
}

@media (max-width: 400px) {
  .title-wrap h1 {
    font-size: clamp(1.5rem, 8vw, 1.9rem);
  }

  .subtitle {
    font-size: 0.86rem;
  }

  .board-shell {
    padding: 7px;
  }
}

@media (orientation: landscape) and (max-height: 560px) {
  .app {
    padding-top: 10px;
    gap: 10px;
  }

  .title-wrap {
    margin-bottom: 4px;
  }
}

@media (min-width: 1025px) {
  .controls {
    grid-template-columns: auto minmax(420px, 620px);
    justify-content: center;
    column-gap: 8px;
    row-gap: 10px;
  }

  #restartBtn {
    grid-column: 1;
    justify-self: end;
    width: 100%;
    max-width: 240px;
    min-width: 128px;
    min-height: 44px;
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    transition: filter 120ms ease;
  }

  .difficulty-wrap {
    grid-column: 2;
    justify-self: start;
    width: min(100%, 620px);
    max-width: 620px;
    display: grid;
    grid-template-columns: auto repeat(3, minmax(128px, 1fr));
    align-items: center;
    padding: 12px 14px;
    border-radius: 14px;
    gap: 10px;
    border-color: rgba(239, 205, 145, 0.68);
    box-shadow:
      0 12px 24px rgba(0, 0, 0, 0.26),
      inset 0 0 0 1px rgba(255, 241, 210, 0.2);
  }

  .difficulty-title {
    font-size: 0.9rem;
    letter-spacing: 0.06em;
  }

  .difficulty-btn {
    min-width: 128px;
    min-height: 44px;
    padding: 6px 10px;
    border-radius: 10px;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    border: 1px solid rgba(228, 195, 137, 0.62);
    background: linear-gradient(180deg, rgba(102, 72, 38, 0.9), rgba(60, 40, 20, 0.92));
    color: #fae7c0;
    width: 100%;
    box-shadow:
      0 2px 6px rgba(0, 0, 0, 0.26),
      inset 0 0 0 1px rgba(255, 230, 180, 0.08);
  }

  #restartBtn:hover,
  .difficulty-btn:hover {
    transform: translateY(0);
    filter: brightness(1.07);
  }

  #restartBtn:active,
  .difficulty-btn:active {
    transform: translateY(0);
    filter: brightness(0.97);
  }

  .difficulty-btn.active {
    color: #2b190b;
    border-color: rgba(249, 226, 178, 0.96);
    background: linear-gradient(180deg, #f8e3bc, #e1bc83);
    box-shadow:
      0 3px 10px rgba(0, 0, 0, 0.22),
      inset 0 0 0 1px rgba(255, 247, 228, 0.62);
  }

  .legend {
    grid-column: 1 / -1;
    justify-self: center;
    flex-wrap: nowrap;
    justify-content: center;
    gap: 12px;
  }

  .legend span {
    white-space: nowrap;
  }
}