:root {
  --bg: #060816;
  --panel: rgba(9, 14, 36, 0.82);
  --panel-strong: rgba(15, 20, 48, 0.95);
  --border: rgba(91, 243, 255, 0.28);
  --text: #eff6ff;
  --muted: #94a0d5;
  --accent: #5bf3ff;
  --accent-2: #ff4fd8;
  --accent-3: #ffe86b;
  --danger: #ff6b8b;
  --success: #63ffa8;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --font: "Trebuchet MS", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

body {
  overflow-x: hidden;
  overflow-y: auto;
}

button,
input {
  font: inherit;
}

.hidden {
  display: none !important;
}

.app-shell {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  overflow-y: auto;
  background:
    radial-gradient(circle at top, rgba(255, 79, 216, 0.16), transparent 28%),
    radial-gradient(circle at 50% 120%, rgba(91, 243, 255, 0.1), transparent 35%),
    linear-gradient(180deg, #0c1028 0%, #060816 55%, #02030a 100%);
}

.backdrop,
.scanlines,
.grid-horizon,
.sun {
  position: absolute;
  inset: 0;
}

.sun {
  inset: auto 50% 48%;
  width: 14rem;
  height: 14rem;
  transform: translateX(-50%);
  border-radius: 50%;
  background:
    linear-gradient(180deg, rgba(255, 232, 107, 0.95), rgba(255, 79, 216, 0.92));
  box-shadow: 0 0 60px rgba(255, 79, 216, 0.3);
  filter: blur(0.3px);
}

.sun::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: repeating-linear-gradient(
    180deg,
    transparent 0 11px,
    rgba(8, 10, 28, 0.35) 11px 15px
  );
}

.grid-horizon {
  top: 52%;
  background:
    linear-gradient(rgba(91, 243, 255, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 243, 255, 0.14) 1px, transparent 1px);
  background-size: 100% 20px, 20px 100%;
  transform-origin: top;
  transform: perspective(500px) rotateX(78deg) scale(2);
  animation: horizon-shift 14s linear infinite;
}

.scanlines {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.03) 0,
    rgba(255, 255, 255, 0.01) 2px,
    transparent 3px,
    transparent 6px
  );
  opacity: 0.18;
  pointer-events: none;
}

.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  min-height: 100dvh;
  padding: max(1rem, env(safe-area-inset-top)) 1rem max(1rem, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
}

.screen,
.panel {
  width: min(100%, 32rem);
}

.screen-game {
  width: min(100%, 32rem);
}

.screen-attract {
  width: min(100%, 42rem);
  min-height: calc(100dvh - max(2rem, env(safe-area-inset-top) + env(safe-area-inset-bottom) + 1rem));
  margin-block: auto;
  justify-content: space-between;
  align-items: center;
  text-align: center;
  gap: clamp(0.75rem, 2vh, 1.25rem);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: 1.5rem;
  backdrop-filter: blur(14px);
}

.screen,
.screen-menu,
.screen-game {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.screen-menu {
  padding: 1.4rem;
}

.attract-logo-block {
  display: grid;
  gap: 0.65rem;
  justify-items: center;
}

.attract-kicker {
  color: var(--accent-3);
}

.attract-logo {
  margin: 0;
  font-size: clamp(2.5rem, 9vw, 5rem);
  line-height: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  text-shadow:
    0 0 22px rgba(91, 243, 255, 0.35),
    0 0 42px rgba(255, 79, 216, 0.18);
}

.attract-subtitle {
  margin: 0;
  max-width: 30rem;
  padding: 0.35rem 0.9rem;
  color: #f8fbff;
  font-size: clamp(0.82rem, 2.2vw, 0.98rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-shadow:
    0 0 14px rgba(91, 243, 255, 0.22),
    0 2px 10px rgba(0, 0, 0, 0.55);
  background: linear-gradient(180deg, rgba(5, 9, 24, 0.56), rgba(5, 9, 24, 0.2));
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

.attract-panel {
  width: min(100%, min(34rem, 72vh));
  padding: clamp(0.8rem, 2vh, 1.15rem);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(4, 8, 22, 0.88);
}

.attract-marquee {
  display: flex;
  justify-content: center;
  padding-bottom: 0.85rem;
  color: var(--accent-3);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-align: center;
}

.attract-board-wrap {
  position: relative;
  width: min(100%, min(26rem, 46vh));
  margin: 0 auto;
  padding: 0.4rem;
  border-radius: 1.4rem;
  background:
    radial-gradient(circle at top, rgba(91, 243, 255, 0.12), transparent 60%),
    rgba(3, 7, 20, 0.95);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.attract-board {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 2px;
  aspect-ratio: 1;
  border-radius: 1rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
}

.attract-cell {
  position: relative;
  background: rgba(255, 255, 255, 0.04);
  min-width: 0;
}

.attract-cell.given {
  background:
    linear-gradient(180deg, rgba(255, 232, 107, 0.24), rgba(255, 232, 107, 0.08));
}

.attract-cell.filled {
  background:
    linear-gradient(180deg, rgba(91, 243, 255, 0.22), rgba(91, 243, 255, 0.07));
}

.attract-cell.selected {
  background:
    linear-gradient(180deg, rgba(255, 79, 216, 0.35), rgba(91, 243, 255, 0.14));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.attract-cell.error {
  background:
    linear-gradient(180deg, rgba(255, 107, 139, 0.4), rgba(255, 107, 139, 0.12));
  animation: pulse-error 420ms ease infinite alternate;
}

.attract-cell.subgrid-right::before,
.attract-cell.subgrid-bottom::after {
  content: "";
  position: absolute;
  background: rgba(255, 79, 216, 0.72);
  pointer-events: none;
}

.attract-cell.subgrid-right::before {
  top: 0;
  right: -2px;
  width: 3px;
  height: 100%;
}

.attract-cell.subgrid-bottom::after {
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 3px;
}

.attract-caption {
  margin: 0;
  padding-top: 0.65rem;
  color: var(--text);
  font-size: clamp(0.82rem, 2vw, 0.95rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.insert-coin {
  margin: 0;
  color: var(--accent-3);
  font-size: clamp(1.25rem, 4.8vw, 2.2rem);
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  animation: insert-coin-blink 850ms steps(1, end) infinite;
}

.attract-cta {
  margin: 0;
  color: var(--muted);
  font-size: clamp(0.72rem, 1.7vw, 0.78rem);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.screen-header h2,
.top-bar-title h2,
.overlay-card h2,
.orientation-card h2 {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.eyebrow,
.tagline,
.top-bar-title p {
  margin: 0;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
}

.hero {
  display: grid;
  gap: 0.55rem;
}

.tagline {
  color: var(--accent);
}

.menu-actions,
.menu-tools {
  display: grid;
  gap: 0.75rem;
}

.menu-button,
.secondary-button,
.number-button,
.submit-button {
  border: 0;
  cursor: pointer;
  border-radius: 1rem;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.menu-button,
.submit-button {
  padding: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #02111a;
  background: linear-gradient(135deg, var(--accent), #8affdf);
  box-shadow: 0 12px 24px rgba(91, 243, 255, 0.25);
}

.secondary-button {
  padding: 0.8rem 1rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.compact {
  padding: 0.65rem 0.85rem;
}

.sound-toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 1rem;
}

.sound-toggle input {
  width: 1.2rem;
  height: 1.2rem;
  accent-color: var(--accent-2);
}

.top-bar,
.screen-header,
.status-bar {
  display: grid;
  gap: 0.75rem;
}

.top-bar {
  width: 100%;
  grid-template-columns: auto 1fr auto;
  align-items: center;
}

.screen-header {
  padding: 1.2rem;
  grid-template-columns: 1fr auto;
  align-items: center;
}

.game-panel {
  padding: 1rem;
}

.status-bar {
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 1rem;
}

.status-card {
  padding: 0.8rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.05);
  text-align: center;
}

.status-label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.board-wrap {
  display: grid;
  gap: 0.65rem;
}

.board-message {
  min-height: 1.25rem;
  color: var(--accent-3);
  text-align: center;
  font-size: 0.9rem;
}

.board {
  display: grid;
  gap: 2px;
  padding: 0.35rem;
  width: 100%;
  border-radius: 1.25rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.03)),
    rgba(5, 9, 24, 0.95);
  aspect-ratio: 1;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 0;
  padding: 0;
  border-radius: 0.4rem;
  min-width: 0;
  aspect-ratio: 1;
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  font-size: clamp(1rem, 4.2vw, 1.8rem);
  font-weight: 800;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.cell.given {
  color: var(--accent-3);
  background: rgba(255, 232, 107, 0.08);
}

.cell.filled {
  color: var(--accent);
}

.cell.selected {
  background: rgba(91, 243, 255, 0.18);
  box-shadow: 0 0 0 1px rgba(91, 243, 255, 0.8), 0 0 20px rgba(91, 243, 255, 0.22);
}

.cell.error {
  background: rgba(255, 107, 139, 0.24);
  color: #fff4f7;
  animation: pulse-error 220ms ease;
}

.cell.subgrid-right::before,
.cell.subgrid-bottom::after {
  content: "";
  position: absolute;
  background: rgba(255, 79, 216, 0.75);
  pointer-events: none;
}

.cell.subgrid-right::before {
  top: 0;
  right: -2px;
  width: 3px;
  height: 100%;
}

.cell.subgrid-bottom::after {
  top: auto;
  right: auto;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 3px;
}

.number-pad {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.number-button {
  padding: 0.95rem 0.5rem;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.number-button.active {
  color: #06111c;
  background: linear-gradient(135deg, var(--accent-2), #ffc4f1);
}

.number-button.fading {
  animation: number-button-fade 2s ease-out;
  animation-fill-mode: both;
}

@keyframes number-button-fade {
  0% {
    color: #06111c;
    background: linear-gradient(135deg, var(--accent-2), #ffc4f1);
    border-color: transparent;
  }

  100% {
    color: var(--text);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.08);
  }
}

.leaderboard-list {
  padding: 0 1.2rem 1.2rem;
  display: grid;
  gap: 0.75rem;
}

.score-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.85rem 0.95rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.05);
}

.score-row small,
.empty-state,
.overlay-card p {
  color: var(--muted);
}

.overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(3, 5, 14, 0.72);
  backdrop-filter: blur(8px);
  z-index: 3;
}

.overlay-card,
.orientation-card {
  padding: 1.35rem;
  display: grid;
  gap: 0.8rem;
}

.name-entry {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.name-entry input {
  flex: 1;
  min-width: 0;
  padding: 0.85rem 1rem;
  border-radius: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  text-transform: uppercase;
}

.overlay-actions {
  display: grid;
  gap: 0.7rem;
}

.orientation-lock {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  padding: 1rem;
  background: rgba(1, 2, 7, 0.92);
  z-index: 4;
}

@media (orientation: landscape) and (max-height: 640px) {
  .orientation-lock {
    display: grid;
  }

  .app {
    visibility: hidden;
  }
}

@media (min-width: 640px) {
  .screen-attract {
    gap: clamp(1rem, 2.4vh, 1.5rem);
  }

  .screen-game {
    width: min(100%, 32rem, calc(100dvh - 19rem));
  }

  .screen-menu {
    padding: 1.7rem;
  }

  .game-panel {
    padding: 1.2rem;
  }
}

@media (min-width: 640px) and (max-height: 900px) {
  .screen-game {
    width: min(100%, 32rem, calc(100dvh - 20rem));
  }

  .status-bar {
    margin-bottom: 0.8rem;
  }

  .board-wrap {
    gap: 0.5rem;
  }

  .number-pad {
    gap: 0.6rem;
    margin-top: 0.8rem;
  }

  .number-button {
    padding: 0.8rem 0.45rem;
  }
}

@media (max-height: 860px) {
  .screen-game {
    gap: 0.75rem;
  }

  .top-bar {
    gap: 0.6rem;
  }

  .game-panel {
    padding: 0.85rem;
  }

  .status-bar {
    margin-bottom: 0.75rem;
  }

  .status-card {
    padding: 0.7rem;
  }

  .board-wrap {
    gap: 0.5rem;
  }

  .number-pad {
    gap: 0.55rem;
    margin-top: 0.75rem;
  }

  .number-button {
    padding: 0.75rem 0.45rem;
    font-size: 1rem;
  }
}

@media (max-height: 760px) {
  .app {
    padding-top: max(0.65rem, env(safe-area-inset-top));
    padding-bottom: max(0.65rem, env(safe-area-inset-bottom));
  }

  .attract-logo-block {
    gap: 0.45rem;
  }

  .attract-panel {
    width: min(100%, min(30rem, 66vh));
  }

  .attract-board-wrap {
    width: min(100%, min(22rem, 40vh));
  }
}

@keyframes horizon-shift {
  from {
    transform: perspective(500px) rotateX(78deg) translateY(0) scale(2);
  }
  to {
    transform: perspective(500px) rotateX(78deg) translateY(18px) scale(2);
  }
}

@keyframes pulse-error {
  from {
    transform: scale(0.96);
  }
  to {
    transform: scale(1);
  }
}

@keyframes insert-coin-blink {
  0%,
  48% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0.18;
  }
}

.menu-button:hover,
.secondary-button:hover,
.number-button:hover,
.submit-button:hover,
.menu-button:active,
.secondary-button:active,
.number-button:active,
.submit-button:active {
  transform: translateY(-1px);
}