:root {
  --bg: #101318;
  --bg-soft: #171c24;
  --panel: rgba(245, 247, 250, 0.9);
  --panel-dark: rgba(20, 25, 33, 0.82);
  --text: #f7fafc;
  --ink: #18202b;
  --muted: #6c7888;
  --line: rgba(255, 255, 255, 0.16);
  --x: #ff4f6d;
  --o: #2ed3b7;
  --amber: #ffb84c;
  --blue: #48a7ff;
  --shadow: 0 26px 70px rgba(0, 0, 0, 0.32);
  --radius: 8px;
  --cell-size: clamp(82px, 18vmin, 136px);
  --gap: clamp(10px, 2vmin, 16px);
  --tilt-x: 58deg;
  --tilt-y: 0deg;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(46, 211, 183, 0.18) 0 16%, transparent 16% 100%),
    linear-gradient(315deg, rgba(255, 79, 109, 0.14) 0 14%, transparent 14% 100%),
    linear-gradient(180deg, #0b0d11 0%, #171b22 52%, #0f1217 100%);
}

body.light {
  --panel: rgba(255, 255, 255, 0.88);
  --text: #17202b;
  --muted: #607080;
  --line: rgba(22, 32, 43, 0.13);
  background:
    linear-gradient(135deg, rgba(46, 211, 183, 0.2) 0 15%, transparent 15% 100%),
    linear-gradient(315deg, rgba(255, 184, 76, 0.22) 0 15%, transparent 15% 100%),
    linear-gradient(180deg, #f6f9fb 0%, #dde8f0 100%);
}

button,
select {
  font: inherit;
}

button {
  border: 0;
}

.fx-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.36;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 58px 58px;
  transform: perspective(900px) rotateX(68deg) translateY(-22vh) scale(1.25);
  transform-origin: top;
  animation: grid-drift 16s linear infinite;
}

.fx-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(115deg, transparent 0 90px, rgba(72, 167, 255, 0.1) 90px 92px, transparent 92px 170px),
    linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.64) 100%);
}

.fx-layer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 80;
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 28px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 22px 0 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
}

.top-bar,
.status-panel,
.score-panel,
.overlay-card {
  border: 1px solid var(--line);
  background: var(--panel-dark);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

body.light .top-bar,
body.light .status-panel,
body.light .score-panel,
body.light .overlay-card {
  background: var(--panel);
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 12px;
  border-radius: var(--radius);
}

.control-cluster {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.profile-cluster {
  justify-content: flex-end;
}

.select-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 5px 5px 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
  color: var(--muted);
  white-space: nowrap;
}

body.light .select-wrap {
  background: rgba(255, 255, 255, 0.72);
}

.select-wrap select {
  min-width: 116px;
  height: 32px;
  border-radius: 6px;
  border: 0;
  padding: 0 10px;
  color: var(--text);
  background: rgba(0, 0, 0, 0.28);
  outline: none;
}

body.light .select-wrap select {
  color: var(--ink);
  background: rgba(20, 32, 43, 0.08);
}

.icon-button,
.ghost-action,
.primary-action {
  min-height: 42px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 170ms ease, box-shadow 170ms ease, background 170ms ease, border-color 170ms ease;
}

.icon-button {
  min-width: 44px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
}

.ghost-action {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  padding: 0 16px;
}

.primary-action {
  color: #0d1218;
  background: linear-gradient(135deg, var(--amber), #ffec8a 48%, var(--o));
  box-shadow: 0 12px 28px rgba(46, 211, 183, 0.23);
  padding: 0 18px;
  font-weight: 800;
}

.compact {
  min-height: 38px;
  padding-inline: 14px;
}

.icon-button:hover,
.ghost-action:hover,
.primary-action:hover {
  transform: translateY(-2px);
}

.primary-action:active,
.ghost-action:active,
.icon-button:active {
  transform: translateY(1px) scale(0.98);
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(210px, 0.72fr) minmax(330px, 1.18fr) minmax(190px, 0.62fr);
  align-items: center;
  gap: 18px;
}

.status-panel,
.score-panel {
  border-radius: var(--radius);
  padding: 18px;
}

.kicker {
  margin: 0 0 8px;
  color: var(--o);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

.status-panel h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 50px);
  line-height: 1;
}

.status-text {
  min-height: 56px;
  margin: 16px 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.5;
}

.turn-track {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.turn-badge {
  height: 74px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
  font-size: 38px;
  font-weight: 900;
  transform: translateZ(0);
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.turn-badge:first-child {
  color: var(--x);
}

.turn-badge:last-child {
  color: var(--o);
}

.turn-badge.active {
  border-color: currentColor;
  box-shadow: 0 0 26px color-mix(in srgb, currentColor 48%, transparent);
  transform: translateY(-4px) scale(1.04);
}

.stage {
  min-height: min(74vh, 670px);
  display: grid;
  place-items: center;
  perspective: 1200px;
}

.board-shell {
  position: relative;
  pointer-events: none;
  transform-style: preserve-3d;
  transform: rotateX(var(--tilt-x)) rotateZ(var(--tilt-y));
  transition: transform 220ms ease;
  filter: drop-shadow(0 38px 34px rgba(0, 0, 0, 0.38));
}

.board-shell::before,
.board-shell::after {
  content: "";
  position: absolute;
  inset: -26px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 18px;
  pointer-events: none;
  transform: translateZ(-48px);
}

.board-shell::after {
  inset: -44px;
  border-color: rgba(46, 211, 183, 0.24);
  transform: translateZ(-86px);
}

.board-backplate {
  position: absolute;
  inset: -18px;
  border-radius: 18px;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(72, 167, 255, 0.42), transparent 28%),
    linear-gradient(315deg, rgba(255, 79, 109, 0.36), transparent 30%),
    #141923;
  transform: translateZ(-34px);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.board {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, var(--cell-size));
  gap: var(--gap);
  pointer-events: auto;
  transform-style: preserve-3d;
  padding: clamp(12px, 2.6vmin, 20px);
}

.cell {
  position: relative;
  width: var(--cell-size);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  overflow: visible;
  cursor: pointer;
  color: var(--text);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.04)),
    #202734;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 -12px 26px rgba(0, 0, 0, 0.28),
    0 18px 0 #0b0f15,
    0 28px 32px rgba(0, 0, 0, 0.28);
  transform: translateZ(22px);
  transform-style: preserve-3d;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background 160ms ease;
}

body.light .cell {
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(218, 230, 238, 0.72)),
    #eef4f8;
  color: var(--ink);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -12px 28px rgba(59, 88, 112, 0.14),
    0 18px 0 #aab8c3,
    0 28px 32px rgba(45, 60, 74, 0.18);
}

.cell::before {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  pointer-events: none;
  transform: translateZ(5px);
}

.cell:hover:not(:disabled) {
  transform: translateZ(42px) translateY(-8px);
  border-color: rgba(46, 211, 183, 0.65);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.2),
    inset 0 -12px 26px rgba(0, 0, 0, 0.26),
    0 22px 0 #0b0f15,
    0 38px 46px rgba(0, 0, 0, 0.36);
}

.cell:disabled {
  cursor: default;
}

.cell-glow {
  position: absolute;
  inset: 16%;
  border-radius: 50%;
  opacity: 0;
  pointer-events: none;
  filter: blur(18px);
  transform: translateZ(2px);
  transition: opacity 180ms ease;
}

.cell[data-marked="X"] .cell-glow {
  background: var(--x);
  opacity: 0.28;
}

.cell[data-marked="O"] .cell-glow {
  background: var(--o);
  opacity: 0.28;
}

.mark-layer {
  position: relative;
  z-index: 2;
  pointer-events: none;
  transform: translateZ(24px);
}

.mark {
  display: inline-block;
  font-size: clamp(46px, 10vmin, 84px);
  font-weight: 950;
  line-height: 1;
  transform-style: preserve-3d;
  text-shadow:
    0 2px 0 rgba(255, 255, 255, 0.2),
    0 8px 0 rgba(0, 0, 0, 0.22),
    0 0 24px currentColor;
  animation: mark-slam 460ms cubic-bezier(.16, 1.24, .35, 1) both;
}

.mark-x {
  color: var(--x);
}

.mark-o {
  color: var(--o);
}

.cell.winning {
  animation: winning-tile 950ms ease-in-out infinite;
  border-color: var(--amber);
}

.cell.winning .mark {
  color: var(--amber);
}

.cell.blocked {
  opacity: 0.88;
}

.score-panel {
  display: grid;
  gap: 12px;
}

.score-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  min-height: 76px;
  border-radius: var(--radius);
  padding: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.06);
}

body.light .score-item {
  background: rgba(255, 255, 255, 0.64);
}

.score-item span {
  color: var(--muted);
  font-weight: 700;
}

.score-item strong {
  min-width: 52px;
  text-align: center;
  font-size: 32px;
  line-height: 1;
}

.score-x strong {
  color: var(--x);
}

.score-o strong {
  color: var(--o);
}

.score-tie strong {
  color: var(--amber);
}

.score-pop {
  animation: score-pop 520ms ease;
}

.user-info {
  min-height: 42px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.user-info img,
.avatar-fallback {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--line);
}

.avatar-fallback {
  display: grid;
  place-items: center;
  color: #0d1218;
  background: linear-gradient(135deg, var(--amber), var(--o));
  font-weight: 900;
}

.splash,
.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(5, 8, 12, 0.82);
  backdrop-filter: blur(12px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 220ms ease, visibility 220ms ease;
}

.splash:not(.show),
.overlay:not(.show) {
  opacity: 0 !important;
  pointer-events: none !important;
  visibility: hidden !important;
}

.splash.show,
.overlay.show {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

.splash {
  grid-template-columns: minmax(250px, 430px) minmax(280px, 520px);
  gap: clamp(18px, 5vw, 64px);
}

.splash-scene {
  position: relative;
  width: min(72vw, 430px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  perspective: 900px;
}

.arena-rings,
.arena-rings::before,
.arena-rings::after {
  position: absolute;
  content: "";
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.15);
  inset: 12%;
  transform: rotateX(70deg);
}

.arena-rings::before {
  inset: 12%;
  border-color: rgba(46, 211, 183, 0.38);
  animation: ring-spin 5s linear infinite;
}

.arena-rings::after {
  inset: 28%;
  border-color: rgba(255, 184, 76, 0.42);
  animation: ring-spin 4s linear infinite reverse;
}

.hero-mark {
  position: absolute;
  font-size: clamp(90px, 20vw, 160px);
  font-weight: 950;
  line-height: 1;
  text-shadow: 0 18px 0 rgba(0, 0, 0, 0.28), 0 0 36px currentColor;
  transform-style: preserve-3d;
}

.hero-x {
  color: var(--x);
  transform: translate(-54px, -18px) rotateY(-28deg) rotateZ(-10deg);
  animation: hero-x 3.2s ease-in-out infinite;
}

.hero-o {
  color: var(--o);
  transform: translate(64px, 34px) rotateY(26deg) rotateZ(12deg);
  animation: hero-o 3.6s ease-in-out infinite;
}

.splash-content {
  max-width: 540px;
}

.splash-content h1 {
  margin: 0;
  font-size: clamp(42px, 8vw, 86px);
  line-height: 0.95;
}

.splash-content p:not(.kicker) {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(17px, 2.4vw, 24px);
  line-height: 1.7;
}

.splash-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.splash-actions .primary-action,
.splash-actions .ghost-action {
  min-width: 136px;
}

.overlay {
  z-index: 120;
}

.overlay-card {
  width: min(92vw, 390px);
  padding: 24px;
  border-radius: var(--radius);
  text-align: center;
  transform: translateY(14px) scale(0.96);
  transition: transform 220ms ease;
}

.overlay.show .overlay-card {
  transform: translateY(0) scale(1);
}

.celebration {
  min-height: 102px;
  display: grid;
  place-items: center;
  margin-bottom: 8px;
}

.celebration .big-mark {
  font-size: 86px;
  font-weight: 950;
  line-height: 1;
  animation: result-pop 720ms cubic-bezier(.16, 1.24, .35, 1) both;
}

.celebration .big-mark.win-x {
  color: var(--x);
}

.celebration .big-mark.win-o {
  color: var(--o);
}

.celebration .big-mark.tie {
  color: var(--amber);
}

.overlay-card p {
  margin: 0 0 18px;
  color: var(--text);
  font-size: 24px;
  font-weight: 800;
}

.confetti,
.spark {
  position: absolute;
  left: var(--xpos);
  top: var(--ypos);
  pointer-events: none;
}

.confetti {
  width: 9px;
  height: 18px;
  border-radius: 2px;
  background: var(--color);
  transform: translate3d(0, 0, 0) rotate(var(--rot));
  animation: confetti-fall var(--dur) ease-out forwards;
}

.spark {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color);
  box-shadow: 0 0 18px var(--color);
  animation: spark-burst 620ms ease-out forwards;
}

@keyframes grid-drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 0 58px, 58px 0; }
}

@keyframes mark-slam {
  0% { opacity: 0; transform: translateZ(90px) scale(1.45) rotateX(-68deg); filter: blur(7px); }
  60% { opacity: 1; transform: translateZ(30px) scale(0.92) rotateX(10deg); filter: blur(0); }
  100% { opacity: 1; transform: translateZ(24px) scale(1) rotateX(0); }
}

@keyframes winning-tile {
  0%, 100% { transform: translateZ(32px) translateY(-3px); box-shadow: 0 18px 0 #0b0f15, 0 0 24px rgba(255, 184, 76, 0.34); }
  50% { transform: translateZ(54px) translateY(-11px); box-shadow: 0 24px 0 #0b0f15, 0 0 42px rgba(255, 184, 76, 0.58); }
}

@keyframes score-pop {
  0% { transform: scale(1); }
  44% { transform: scale(1.18); }
  100% { transform: scale(1); }
}

@keyframes result-pop {
  0% { opacity: 0; transform: translateY(28px) scale(0.68) rotateX(-70deg); }
  72% { opacity: 1; transform: translateY(-8px) scale(1.08) rotateX(8deg); }
  100% { opacity: 1; transform: translateY(0) scale(1) rotateX(0); }
}

@keyframes confetti-fall {
  0% { opacity: 1; transform: translate3d(0, 0, 0) rotate(var(--rot)); }
  100% { opacity: 0; transform: translate3d(var(--dx), var(--dy), 0) rotate(calc(var(--rot) + 420deg)); }
}

@keyframes spark-burst {
  0% { opacity: 1; transform: translate(-50%, -50%) scale(0.5); }
  100% { opacity: 0; transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(0); }
}

@keyframes ring-spin {
  to { transform: rotateX(70deg) rotateZ(360deg); }
}

@keyframes hero-x {
  0%, 100% { transform: translate(-54px, -18px) rotateY(-28deg) rotateZ(-10deg) translateZ(30px); }
  50% { transform: translate(-40px, -34px) rotateY(-8deg) rotateZ(6deg) translateZ(70px); }
}

@keyframes hero-o {
  0%, 100% { transform: translate(64px, 34px) rotateY(26deg) rotateZ(12deg) translateZ(18px); }
  50% { transform: translate(44px, 18px) rotateY(6deg) rotateZ(-6deg) translateZ(58px); }
}

@media (max-width: 980px) {
  .app-shell {
    justify-content: flex-start;
  }

  .game-layout {
    grid-template-columns: 1fr;
  }

  .status-panel,
  .score-panel {
    width: 100%;
  }

  .score-panel {
    grid-template-columns: repeat(3, 1fr);
  }

  .stage {
    min-height: auto;
    padding: 24px 0 36px;
  }
}

@media (max-width: 720px) {
  :root {
    --cell-size: clamp(72px, 25vw, 108px);
    --gap: 9px;
  }

  .top-bar {
    align-items: stretch;
    flex-direction: column;
  }

  .control-cluster,
  .profile-cluster {
    justify-content: center;
  }

  .select-wrap {
    flex: 1 1 160px;
    justify-content: space-between;
  }

  .select-wrap select {
    min-width: 96px;
  }

  .splash {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .splash-scene {
    width: min(76vw, 310px);
  }

  .splash-actions {
    justify-content: center;
  }

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

  .board-shell {
    transform: rotateX(50deg) rotateZ(var(--tilt-y));
  }
}

@media (max-width: 430px) {
  :root {
    --cell-size: clamp(64px, 27vw, 88px);
    --gap: 7px;
  }

  .app-shell {
    width: min(100% - 18px, 1180px);
    padding-top: 12px;
  }

  .status-panel h2 {
    font-size: 34px;
  }

  .turn-badge {
    height: 58px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}


/* Refined public game: deliberate blue / amber, less motion, clear focus. */
@font-face{font-family:Manrope;src:url('assets/fonts/Manrope.ttf');font-weight:200 800;font-display:swap}
@font-face{font-family:'Cairo';src:url('assets/fonts/Cairo.ttf');font-weight:100 900;font-display:swap}
:root{--x:#8fc0ff;--o:#e7b768;--amber:#e7b768;--blue:#8fc0ff;--tilt-x:32deg;--shadow:0 20px 45px rgba(0,0,0,.18)}
body{background:#151d27;font-family:Manrope,'Cairo',sans-serif}
html[dir=rtl] body{font-family:'Cairo',Manrope,sans-serif}
body.light{background:#f5f6f8;--x:#244573;--o:#986410;--amber:#da952f;--blue:#244573}
.fx-grid{display:none}
.status-panel h2{line-height:1.4}
body:not(.light){--muted:#b8c4d2}
.primary-action{background:#e7b768;box-shadow:none}
button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #e7b768;outline-offset:4px}
.splash{background:#151d27}
body.light .splash{background:#f5f6f8;color:#25354c}
.splash-scene{transform:scale(.8)}
.hero-mark,.arena-rings{animation:none}
.home-link{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}
.game-footer{display:flex;justify-content:center;align-items:center;gap:20px;flex-wrap:wrap;font-size:13px;color:var(--text)}
.game-footer p{margin:0}
.board-shell{--tilt-x:32deg}
@media(max-width:720px){.board-shell{transform:rotateX(12deg) rotateZ(0deg)}.top-bar{align-items:stretch}.profile-cluster{justify-content:space-between}.game-layout{gap:16px}.stage{min-height:300px}.score-panel{grid-template-columns:repeat(3,minmax(0,1fr))}.score-item{padding:10px;font-size:12px}.score-item strong{font-size:28px}}
@media(max-width:430px){.control-cluster{gap:8px}.select-wrap{flex:1 1 100%;justify-content:space-between;min-width:0}.select-wrap select{min-width:140px;width:auto}.board-shell{--cell-size:clamp(66px,23vw,88px)}.board-shell::before,.board-shell::after{display:none}.splash-content h1{font-size:40px}.splash-content{padding:20px}.status-panel{padding:16px}.status-panel h2{font-size:28px}}
@media(prefers-reduced-motion:reduce){.board-shell{transform:rotateX(0deg)!important}.fx-grid{display:none}}

/* Original XO identity, shared with the portfolio. */
.splash-scene{display:flex;align-items:center;justify-content:center}
.game-logo{width:min(250px,65vw);height:250px;object-fit:contain;filter:drop-shadow(0 20px 20px rgba(0,0,0,.16))}
.brand-mark{width:62px;height:62px;object-fit:contain;margin-bottom:14px}
html[dir=rtl] body{font-family:Cairo,Tahoma,sans-serif}