:root {
  --bg-1: #2a6a93;
  --bg-2: #2a6a93;
  --panel: rgba(10, 20, 36, 0.82);
  --panel-border: rgba(215, 239, 252, 0.24);
  --text: #ebf7ff;
  --muted: #d2e5f1;
  --cyan: #d9f3ff;
  --lime: #bef264;
  --pink: #f9a8d4;
  --gold: #fde68a;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", Verdana, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.1), transparent 24%),
    radial-gradient(circle at 80% 10%, rgba(217, 243, 255, 0.14), transparent 20%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
}

.screen {
  width: min(1280px, calc(100vw - 28px));
  margin: 22px auto;
}

.start-screen,
.hero,
.hud,
.players,
.board-wrap {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.start-screen {
  min-height: calc(100vh - 44px);
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
}

.start-screen::before,
.start-screen::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(8px);
  opacity: 0.5;
}

.start-screen::before {
  width: 280px;
  height: 280px;
  top: -60px;
  left: -50px;
  background: rgba(255, 255, 255, 0.12);
}

.start-screen::after {
  width: 240px;
  height: 240px;
  right: -40px;
  bottom: -40px;
  background: rgba(217, 243, 255, 0.14);
}

.start-content {
  position: relative;
  z-index: 1;
  width: min(820px, calc(100vw - 40px));
  padding: 42px 30px;
  text-align: center;
  display: grid;
  gap: 18px;
}

.kicker {
  margin: 0;
  color: var(--cyan);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 5.2rem);
  line-height: 0.95;
}

.lead {
  margin: 0 auto;
  max-width: 720px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.invite {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 8px;
}

.invite-card {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.invite-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
}

.invite-card span {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.robot-row {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.preview-chip {
  width: 72px;
  height: 72px;
  padding: 6px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.preview-chip img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 14px;
}

.game-screen {
  display: none;
  gap: 18px;
}

.game-screen.is-active {
  display: grid;
}

.hero {
  padding: 28px;
  display: grid;
  gap: 12px;
}

.hud {
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  align-items: center;
}

.highlight-turn {
  background: linear-gradient(145deg, rgba(190, 242, 100, 0.2), rgba(255, 255, 255, 0.06));
  border-color: rgba(190, 242, 100, 0.26);
}

.stat {
  padding: 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.value {
  font-size: 1.7rem;
  font-weight: 700;
}

.cta {
  appearance: none;
  border: 0;
  border-radius: 18px;
  padding: 16px 18px;
  font: inherit;
  font-weight: 800;
  color: #16334a;
  cursor: pointer;
  background: linear-gradient(135deg, #ffffff, #d9f3ff);
  transition: transform 160ms ease, box-shadow 160ms ease;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.22);
}

.cta.alt {
  justify-self: center;
  min-width: 220px;
  font-size: 1.05rem;
  padding: 18px 26px;
}

.players {
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.player-card {
  position: relative;
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  opacity: 0.55;
  transform: scale(0.98);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease, opacity 160ms ease, background 160ms ease;
}

.turn-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  display: none;
  padding: 6px 10px;
  border-radius: 999px;
  background: #bef264;
  color: #16334a;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.player-card.is-active {
  opacity: 1;
  transform: scale(1.02);
  background: linear-gradient(145deg, rgba(190, 242, 100, 0.18), rgba(255, 255, 255, 0.08));
  border-color: rgba(190, 242, 100, 0.76);
  box-shadow: 0 0 0 2px rgba(190, 242, 100, 0.34), 0 16px 36px rgba(0, 0, 0, 0.22);
}

.player-card.is-active .turn-badge {
  display: inline-flex;
}

.player-card.is-active .player-score {
  color: var(--lime);
  text-shadow: 0 0 18px rgba(190, 242, 100, 0.28);
}

.player-score {
  display: block;
  font-size: 1.6rem;
  line-height: 1.1;
}

.board-wrap {
  padding: 18px;
}

.board {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.card {
  position: relative;
  min-height: 170px;
  border: 0;
  cursor: pointer;
  background: transparent;
  perspective: 1000px;
}

.card-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 22px;
  backface-visibility: hidden;
  transition: transform 260ms ease;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.card-back {
  padding: 14px;
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.12), rgba(217, 243, 255, 0.08)),
    rgba(255, 255, 255, 0.04);
  transform: rotateY(0deg);
}

.card-front {
  padding: 14px;
  text-align: center;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.12), transparent 45%),
    rgba(16, 51, 74, 0.94);
  transform: rotateY(180deg);
}

.card.is-flipped .card-back,
.card.is-matched .card-back {
  transform: rotateY(180deg);
}

.card.is-flipped .card-front,
.card.is-matched .card-front {
  transform: rotateY(360deg);
}

.card.is-matched .card-front {
  box-shadow: inset 0 0 0 2px rgba(217, 243, 255, 0.65), 0 0 24px rgba(217, 243, 255, 0.18);
}

.card-media {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.card-media img {
  width: 100%;
  height: 100%;
  max-width: 170px;
  max-height: 170px;
  object-fit: contain;
  border-radius: 16px;
  display: block;
}

.bot-name {
  display: none;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.back-mark {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.back-mark img {
  width: 100%;
  height: 100%;
  max-width: 128px;
  max-height: 128px;
  object-fit: contain;
  display: block;
}

.message {
  min-height: 28px;
  margin: 6px 4px 0;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(5, 18, 28, 0.68);
  z-index: 20;
}

.modal-card {
  width: min(520px, calc(100vw - 30px));
  padding: 28px;
  border-radius: 28px;
  background: rgba(16, 51, 74, 0.96);
  border: 1px solid rgba(215, 239, 252, 0.24);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  text-align: center;
}

.modal-card h2 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 5vw, 3rem);
}

.modal-text {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.modal-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}

.modal-scoreboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 22px;
}

.modal-stat {
  padding: 16px 12px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.is-hidden {
  display: none;
}

@media (max-width: 780px) {
  .invite {
    grid-template-columns: 1fr;
  }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .player-card,
  .player-card.is-active {
    transform: none;
  }

  .board {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .modal-stats,
  .modal-scoreboard {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .screen {
    width: min(100vw - 18px, 100%);
  }

  .start-screen,
  .hero,
  .hud,
  .board-wrap {
    border-radius: 20px;
  }

  .board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .card {
    min-height: 138px;
  }

  .card-media img {
    max-width: 108px;
    max-height: 108px;
  }
}