:root {
  --ink: #18211f;
  --muted: #74817d;
  --paper: #f4f5ef;
  --lime: #d9ff65;
  --orange: #ff775d;
  --line: #dbe0d8;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}
.shell {
  max-width: 1180px;
  margin: auto;
  padding: 34px 42px 60px;
}
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.1em;
  display: flex;
  gap: 10px;
  align-items: center;
}
.brand b {
  color: #99ad37;
}
.brand-mark {
  background: var(--ink);
  color: var(--lime);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 20px;
}
.nav-user {
  font:
    12px "Courier New",
    monospace;
  letter-spacing: 0.06em;
}
.hidden {
  display: none !important;
}
.auth-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 100px;
  align-items: center;
  min-height: calc(100vh - 150px);
}
.eyebrow {
  font:
    11px "Courier New",
    monospace;
  letter-spacing: 0.16em;
  color: #78847e;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(64px, 9vw, 124px);
  line-height: 0.86;
  letter-spacing: -0.075em;
  margin: 0 0 32px;
  font-weight: 600;
}
.hero h1 em {
  font-style: normal;
  color: var(--orange);
}
.hero p {
  color: #697670;
  max-width: 410px;
  line-height: 1.7;
  font-size: 17px;
}
.hero-foot {
  display: flex;
  gap: 22px;
  margin-top: 70px;
  font:
    10px "Courier New",
    monospace;
  color: #a1aaa4;
}
.auth-card {
  background: white;
  border: 1px solid var(--line);
  padding: 34px;
  border-radius: 5px;
  box-shadow: 10px 10px 0 #e5e9df;
}
.tabs {
  display: flex;
  gap: 25px;
  border-bottom: 1px solid var(--line);
  margin: -34px -34px 32px;
  padding: 22px 34px 0;
}
.tab {
  background: none;
  border: 0;
  padding: 0 0 18px;
  font: 500 13px inherit;
  color: #9aa39d;
  cursor: pointer;
}
.tab.active {
  color: var(--ink);
  border-bottom: 2px solid var(--orange);
}
h2 {
  font-size: 30px;
  margin: 0 0 8px;
  letter-spacing: -0.04em;
}
.auth-card p {
  color: var(--muted);
  margin: 0 0 28px;
}
.auth-card label {
  display: block;
  font:
    10px "Courier New",
    monospace;
  letter-spacing: 0.1em;
  color: #707a75;
  margin: 18px 0;
}
.auth-card input {
  display: block;
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--line);
  font: 16px inherit;
  padding: 11px 0;
  outline: 0;
  color: var(--ink);
}
.auth-card input:focus {
  border-color: var(--orange);
}
button {
  font-family: inherit;
  cursor: pointer;
}
.primary {
  border: 0;
  border-radius: 3px;
  background: var(--ink);
  color: white;
  width: 100%;
  padding: 16px 18px;
  margin-top: 20px;
  display: flex;
  justify-content: space-between;
  font-weight: 600;
}
.primary:hover {
  background: #293a35;
}
.auth-card small {
  display: block;
  color: #a4ada7;
  font:
    10px "Courier New",
    monospace;
  margin-top: 25px;
}
.error {
  color: var(--orange);
  font-size: 12px;
  margin-top: 15px;
  min-height: 16px;
}
.game-top {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin: 90px 0 46px;
}
.game-top h1 {
  margin: 0;
  font-size: 48px;
  letter-spacing: -0.06em;
}
.game-top p {
  color: var(--muted);
  margin-top: 10px;
}
.ghost {
  border: 1px solid var(--line);
  background: transparent;
  padding: 10px 14px;
  color: var(--muted);
  font-size: 12px;
}
.arena-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 44px;
}
.side-panel {
  border-top: 2px solid var(--ink);
  padding-top: 23px;
}
.profile-head {
  display: flex;
  align-items: center;
  gap: 12px;
}
.avatar {
  width: 42px;
  height: 42px;
  background: var(--lime);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 700;
}
.profile-head span,
.rating span,
.stats span {
  display: block;
  font:
    10px "Courier New",
    monospace;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-top: 5px;
}
.rating {
  margin: 38px 0 28px;
}
.rating strong {
  font-size: 42px;
  display: block;
  margin-top: 8px;
  letter-spacing: -0.06em;
}
.rating-bar {
  height: 5px;
  background: #e6eae2;
  margin-top: 12px;
}
.rating-bar i {
  display: block;
  width: 60%;
  height: 100%;
  background: var(--orange);
}
.stats {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}
.stats strong {
  font-size: 20px;
}
.side-panel .primary {
  margin-top: 35px;
}
.queue {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 17px;
  font:
    11px "Courier New",
    monospace;
  color: var(--muted);
}
.challenge-box {
  border-top: 1px solid #2c3755;
  margin-top: 28px;
  padding-top: 22px;
}
.challenge-title {
  color: var(--lime);
  font:
    10px "Courier New",
    monospace;
  letter-spacing: 0.12em;
}
.challenge-copy {
  color: #7180a3;
  font-size: 11px;
  line-height: 1.5;
  margin: 8px 0 12px;
}
.challenge-form {
  display: flex;
  gap: 6px;
}
.challenge-form input {
  min-width: 0;
  width: 100%;
  border: 1px solid #303b5b;
  background: #10172b;
  color: #fff;
  padding: 10px;
  font:
    11px "Courier New",
    monospace;
  outline: 0;
}
.challenge-form button,
.challenge-action {
  border: 1px solid #5e7534;
  background: transparent;
  color: var(--lime);
  padding: 8px 9px;
  font:
    10px "Courier New",
    monospace;
  white-space: nowrap;
}
.challenge-form button:hover,
.challenge-action.accept:hover {
  background: #22351d;
}
.challenge-message {
  color: var(--orange);
  font:
    10px "Courier New",
    monospace;
  min-height: 16px;
  margin-top: 9px;
}
.challenge-empty,
.challenge-waiting {
  color: #586783;
  font:
    9px "Courier New",
    monospace;
  letter-spacing: 0.08em;
  padding-top: 9px;
}
.challenge-row {
  align-items: center;
  border-top: 1px solid #222d49;
  display: flex;
  gap: 8px;
  justify-content: space-between;
  padding: 10px 0;
}
.challenge-row strong {
  display: block;
  font-size: 12px;
}
.challenge-row small {
  color: #7180a3;
  display: block;
  font:
    9px "Courier New",
    monospace;
  margin-top: 4px;
}
.challenge-actions {
  display: flex;
  gap: 4px;
}
.challenge-action.decline {
  border-color: #63354d;
  color: #ff86a4;
}
.challenge-action.decline:hover {
  background: #2c1729;
}
.queue i,
.live-dot {
  width: 7px;
  height: 7px;
  background: var(--orange);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 1.2s infinite;
}
@keyframes pulse {
  50% {
    opacity: 0.3;
  }
}
.board-panel {
  background: white;
  padding: 30px 38px 28px;
  border: 1px solid var(--line);
}
.players {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 26px;
}
.player {
  display: flex;
  gap: 10px;
  align-items: center;
}
.player.opponent {
  text-align: right;
}
.player.opponent .token {
  order: 2;
}
.player strong {
  display: block;
  font-size: 12px;
}
.player small {
  display: block;
  font:
    10px "Courier New",
    monospace;
  color: var(--muted);
  margin-top: 4px;
}
.token {
  width: 32px;
  height: 32px;
  border-radius: 3px;
  display: grid;
  place-items: center;
  font-weight: 700;
}
.token.x {
  background: var(--lime);
}
.token.o {
  background: #e8ebe5;
}
.turn-badge {
  font:
    10px "Courier New",
    monospace;
  color: var(--orange);
  letter-spacing: 0.1em;
  display: grid;
  gap: 5px;
  text-align: center;
}
.turn-badge strong {
  color: var(--ink);
  font:
    700 22px Arial,
    sans-serif;
  letter-spacing: -0.04em;
}
.forfeit {
  display: block;
  margin: 18px auto 0;
  border: 1px solid #f0c5bc;
  background: white;
  color: var(--orange);
  padding: 10px 18px;
  font:
    11px "Courier New",
    monospace;
}
.forfeit:hover {
  background: #fff5f2;
}
.board {
  max-width: 520px;
  margin: auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 2px solid var(--ink);
}
.cell {
  aspect-ratio: 1;
  border: 0;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  background: #fff;
  display: grid;
  place-items: center;
  font-size: clamp(42px, 8vw, 76px);
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
}
.cell:nth-child(3n) {
  border-right: 0;
}
.cell:nth-child(n + 7) {
  border-bottom: 0;
}
.cell.x {
  color: var(--ink);
}
.cell.o {
  color: var(--orange);
}
.cell:disabled {
  cursor: default;
}
.cell:not(:disabled):hover {
  background: #f3f7e7;
}
.result {
  text-align: center;
  font:
    11px "Courier New",
    monospace;
  color: var(--muted);
  padding: 24px 0 0;
  min-height: 35px;
}
@media (max-width: 760px) {
  .shell {
    padding: 22px 20px;
  }
  .auth-layout {
    grid-template-columns: 1fr;
    gap: 36px;
    min-height: auto;
    padding-top: 70px;
  }
  .hero h1 {
    font-size: 72px;
  }
  .hero-foot {
    margin-top: 35px;
  }
  .auth-card {
    box-shadow: 5px 5px 0 #e5e9df;
  }
  .game-top {
    margin: 65px 0 32px;
  }
  .game-top h1 {
    font-size: 35px;
  }
  .arena-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .side-panel {
    order: 2;
  }
  .board-panel {
    padding: 22px 16px;
  }
  .players {
    gap: 8px;
  }
  .player strong {
    font-size: 10px;
  }
  .hero p {
    font-size: 15px;
  }
}

/* Arcade arena theme */
:root {
  --ink: #f4f7ff;
  --muted: #8d98b5;
  --paper: #080b16;
  --lime: #baff45;
  --orange: #ff5e87;
  --line: #28314d;
}
body {
  min-height: 100vh;
  background:
    radial-gradient(
      circle at 12% 12%,
      rgba(67, 88, 190, 0.28),
      transparent 28rem
    ),
    radial-gradient(
      circle at 86% 72%,
      rgba(255, 54, 127, 0.14),
      transparent 28rem
    ),
    #080b16;
  color: var(--ink);
  overflow-x: hidden;
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(113, 132, 190, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(113, 132, 190, 0.06) 1px, transparent 1px);
  background-size: 42px 42px;
  content: "";
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}
nav {
  border-bottom: 1px solid rgba(126, 146, 207, 0.2);
  padding-bottom: 22px;
}
.brand {
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.18em;
}
.brand b {
  color: var(--lime);
}
.brand-mark {
  background: var(--lime);
  box-shadow: 0 0 20px rgba(186, 255, 69, 0.45);
  color: #101529;
}
.eyebrow {
  color: #7583a9;
}
.hero h1 {
  color: #fff;
  text-shadow: 0 0 35px rgba(125, 148, 255, 0.18);
}
.hero h1 em {
  color: var(--orange);
  text-shadow: 0 0 28px rgba(255, 94, 135, 0.45);
}
.hero p,
.game-top p {
  color: #9ca7c2;
}
.hero-foot {
  color: #64718f;
}
.auth-card,
.board-panel {
  background: rgba(15, 21, 40, 0.88);
  border: 1px solid #2b3657;
  box-shadow:
    0 18px 60px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(126, 146, 207, 0.04) inset;
  color: var(--ink);
}
.auth-card input {
  background: transparent;
  color: #fff;
  border-color: #303b5b;
}
.auth-card input::placeholder {
  color: #55617f;
}
.tab {
  color: #65718f;
}
.tab.active {
  color: #fff;
  border-color: var(--lime);
}
.primary {
  background: var(--lime);
  box-shadow: 0 0 22px rgba(186, 255, 69, 0.15);
  color: #101529;
}
.primary:hover {
  background: #d1ff78;
  color: #101529;
}
.ghost {
  border-color: #34405f;
  color: #a2aec9;
}
.game-top {
  margin-top: 70px;
}
.game-top h1 {
  color: #fff;
}
.side-panel {
  border-color: var(--lime);
}
.avatar,
.token.x {
  background: var(--lime);
  color: #101529;
  box-shadow: 0 0 18px rgba(186, 255, 69, 0.22);
}
.profile-head span,
.rating span,
.stats span,
.player small {
  color: #7180a3;
}
.rating strong {
  color: #fff;
}
.rating-bar {
  background: #222c47;
}
.rating-bar i {
  background: var(--lime);
  box-shadow: 0 0 12px rgba(186, 255, 69, 0.5);
}
.stats {
  border-color: #2c3755;
}
.stats strong {
  color: #fff;
}
.queue {
  color: #92a0be;
}
.queue i,
.live-dot {
  background: var(--orange);
  box-shadow: 0 0 10px var(--orange);
}
.players {
  border-bottom: 1px solid #273250;
  padding-bottom: 20px;
}
.token.o {
  background: #202943;
  color: var(--orange);
  box-shadow: 0 0 18px rgba(255, 94, 135, 0.14);
}
.turn-badge {
  color: var(--lime);
}
.turn-badge strong {
  color: #fff;
}
.board {
  border: 2px solid #52628f;
  box-shadow:
    0 0 0 8px rgba(53, 70, 117, 0.12),
    0 0 44px rgba(71, 96, 179, 0.18);
}
.cell {
  background: #10172b;
  border-color: #52628f;
  color: #fff;
}
.cell.x {
  color: var(--lime);
  text-shadow: 0 0 24px rgba(186, 255, 69, 0.6);
}
.cell.o {
  color: var(--orange);
  text-shadow: 0 0 24px rgba(255, 94, 135, 0.6);
}
.cell:not(:disabled):hover {
  background: #1c2744;
}
.result {
  color: #93a0bf;
}
.forfeit {
  border-color: #63354d;
  background: transparent;
  color: #ff86a4;
}
.forfeit:hover {
  background: #2c1729;
}