:root {
  color-scheme: dark;
  --bg: #12131a;
  --panel: #1c1e29;
  --cell: #262939;
  --cell-locked: #1a1b24;
  --accent: #5eead4;
  --accent-2: #f472b6;
  --miss: #ef4444;
  --text: #e6e7ee;
  --text-dim: #8a8da3;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  height: 100vh;
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 0%, #1e2130, var(--bg));
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--text);
  overflow: hidden;
}

.app {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(0.5rem, 2vmin, 1rem);
  padding: clamp(0.75rem, 3vmin, 1.5rem);
  width: min(560px, 92vmin, 95vw);
}

h1 {
  margin: 0;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-size: clamp(1.1rem, 5.5vmin, 1.6rem);
  color: var(--accent);
}

.hud {
  display: flex;
  width: 100%;
  justify-content: space-between;
  background: var(--panel);
  border-radius: 12px;
  padding: clamp(0.4rem, 2vmin, 0.75rem) clamp(0.5rem, 2.5vmin, 1rem);
}

.hud-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  flex: 1;
}

.hud-label {
  font-size: clamp(0.55rem, 1.8vmin, 0.7rem);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.hud-value {
  font-size: clamp(0.85rem, 3vmin, 1.1rem);
  font-weight: 600;
}

#lives {
  color: var(--accent-2);
  letter-spacing: 0.15em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: clamp(4px, 1.8vmin, 10px);
  width: 100%;
  aspect-ratio: 1 / 1;
  background: var(--panel);
  padding: clamp(6px, 2.2vmin, 12px);
  border-radius: 16px;
}

.cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: 50%;
  background: var(--cell);
  transition: background 0.15s ease, opacity 0.2s ease, transform 0.1s ease;
  cursor: default;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.cell .mole {
  height: 78%;
  width: 78%;
  object-fit: contain;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.12s ease, transform 0.12s ease;
  pointer-events: none;
}

.cell .mole.visible {
  opacity: 1;
  transform: scale(1);
}

.cell.locked {
  background: var(--cell-locked);
  opacity: 0.35;
}

.cell.active-zone {
  cursor: pointer;
}

.cell.lit {
  background: var(--cell);
  box-shadow: 0 0 16px 2px rgba(94, 234, 212, 0.4);
  animation: pulse var(--lit-duration, 1s) linear forwards;
}

.cell.lit:active {
  transform: scale(0.9);
}

.cell.hit {
  background: var(--accent-2);
  box-shadow: 0 0 18px 4px var(--accent-2);
}

.cell.missed {
  background: var(--miss);
}

@keyframes pulse {
  from { filter: brightness(1.15); }
  to { filter: brightness(0.55); }
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 11, 16, 0.75);
  border-radius: 16px;
}

.overlay.hidden {
  display: none;
}

.overlay-card {
  background: var(--panel);
  border-radius: 14px;
  padding: 1.5rem;
  width: min(420px, 85vw);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.overlay-card h2 {
  margin: 0;
  color: var(--accent);
}

.overlay-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.4;
}

.auth-box {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.auth-buttons {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.auth-btn {
  padding: 0.45rem 0.9rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: transform 0.1s ease;
}

.auth-btn:hover {
  transform: translateY(-1px);
}

.auth-btn-primary {
  background: var(--accent);
  color: #08221d;
}

.auth-btn-secondary {
  background: var(--cell);
  color: var(--text);
}

.auth-user {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 0.75rem;
  background: var(--cell);
  border-radius: 10px;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
}

.auth-username {
  font-weight: 600;
}

.auth-coins {
  color: var(--accent);
  font-weight: 600;
}

.auth-link-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.8rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
}

.auth-form input {
  background: var(--cell);
  border: 1px solid var(--cell-locked);
  border-radius: 8px;
  padding: 0.5rem 0.6rem;
  color: var(--text);
  font-size: 0.9rem;
}

.auth-form input:focus {
  outline: 1px solid var(--accent);
}

.auth-form-error {
  margin: 0;
  color: var(--miss);
  font-size: 0.8rem;
  min-height: 1em;
}

.auth-form-actions {
  display: flex;
  gap: 0.5rem;
}

.auth-form-actions .auth-btn {
  flex: 1;
}

.auth-switch {
  margin: 0;
  font-size: 0.8rem;
  text-align: center;
}

.auth-switch a {
  color: var(--accent);
}

.reward-text {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
}

.reward-text.hidden {
  display: none;
}

#start-btn {
  margin-top: 0.5rem;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #08221d;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.1s ease;
}

#start-btn:hover {
  transform: translateY(-1px);
}

.back-btn {
  margin-top: 0.25rem;
  padding: 0.5rem 1.1rem;
  border-radius: 8px;
  background: var(--cell);
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: transform 0.1s ease;
}

.back-btn:hover {
  transform: translateY(-1px);
}

.back-btn.hidden {
  display: none;
}

.leaderboard-box {
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--cell-locked);
}

.leaderboard-box h3 {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.leaderboard-list {
  list-style: none;
  counter-reset: leaderboard;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-height: 220px;
  overflow-y: auto;
}

.leaderboard-list li {
  counter-increment: leaderboard;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--cell);
  border-radius: 8px;
  padding: 0.35rem 0.6rem;
  font-size: 0.85rem;
}

.leaderboard-list li::before {
  content: counter(leaderboard);
  flex: 0 0 auto;
  width: 1.4em;
  color: var(--text-dim);
  font-weight: 700;
  text-align: right;
}

.leaderboard-name {
  flex: 1;
  text-align: left;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-score {
  color: var(--accent);
  font-weight: 700;
}

.leaderboard-time {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.leaderboard-empty {
  color: var(--text-dim);
  font-size: 0.85rem;
  text-align: center;
  background: none !important;
}