.screen {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(6, 4, 15, 0.86);
  backdrop-filter: blur(3px);
  text-align: center;
}
.screen.hidden { display: none; }

.card {
  width: 100%;
  max-width: 420px;
  background: linear-gradient(180deg, #1c1032, #120a24);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 18px;
  padding: 28px 24px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.title-block { margin-bottom: 18px; }
.title-block .title-blast {
  font-size: 1.1rem;
  letter-spacing: 4px;
  color: var(--accent-2);
  font-weight: 700;
}
.title-block .title-tower {
  font-size: 2.1rem;
  font-weight: 900;
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--gold), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 30px rgba(255, 93, 122, 0.25);
}
.subtitle { color: var(--text-dim); font-size: 0.85rem; margin-top: 6px; }

.btn {
  display: block;
  width: 100%;
  padding: 13px 18px;
  margin-top: 10px;
  border-radius: 12px;
  font-weight: 800;
  letter-spacing: 0.6px;
  font-size: 0.95rem;
  transition: transform 0.12s ease, filter 0.12s ease;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff2e6c);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 93, 122, 0.35);
}
.btn-secondary {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.14);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.btn-row { display: flex; gap: 10px; }
.btn-row .btn { margin-top: 0; }

.menu-toggle-row { display: flex; gap: 8px; margin-top: 14px; }
.menu-toggle-row button {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 0.8rem;
  color: var(--text-dim);
}
.menu-toggle-row button[aria-pressed="true"] { color: #fff; border-color: var(--accent-2); }

.tutorial-steps { display: flex; flex-direction: column; gap: 10px; margin: 16px 0; text-align: left; }
.tutorial-step {
  display: flex; gap: 12px; align-items: flex-start;
  background: rgba(255,255,255,0.04);
  border-radius: 10px; padding: 10px 12px;
}
.tutorial-step .num {
  width: 26px; height: 26px; flex: none;
  border-radius: 50%;
  background: var(--accent);
  color: #fff; font-weight: 800; font-size: 0.85rem;
  display: grid; place-items: center;
}
.tutorial-step .txt { font-size: 0.85rem; color: var(--text-dim); }
.tutorial-step .txt b { color: #fff; }

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0;
}
.stat-box {
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  padding: 10px;
}
.stat-box .label { font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.5px; }
.stat-box .value { font-size: 1.3rem; font-weight: 800; color: #fff; margin-top: 2px; }
.rank-line { margin: 4px 0 14px; color: var(--gold); font-weight: 700; font-size: 0.9rem; min-height: 1.2em; }

.nickname-field {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.16);
  color: #fff;
  font-size: 1rem;
  text-align: center;
  letter-spacing: 1px;
  margin: 6px 0;
}
.nickname-field::placeholder { color: rgba(255,255,255,0.3); }
.field-error { color: var(--accent); font-size: 0.78rem; min-height: 1.1em; margin-bottom: 6px; }
.field-hint { color: var(--text-dim); font-size: 0.72rem; margin-top: -2px; margin-bottom: 10px; }

.leaderboard-list { max-height: 46vh; overflow-y: auto; margin: 12px 0; }
.lb-row, .lb-loading {
  display: grid;
  grid-template-columns: 34px 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 8px 6px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 0.85rem;
  text-align: left;
}
.lb-loading { display: block; text-align: center; color: var(--text-dim); padding: 20px 0; }
.lb-rank { color: var(--text-dim); font-weight: 700; }
.lb-top .lb-rank { color: var(--gold); }
.lb-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-score { color: var(--gold); font-weight: 800; }
.lb-level { color: var(--text-dim); font-size: 0.75rem; }

@media (max-width: 420px) {
  .card { padding: 20px 16px; }
  .title-block .title-tower { font-size: 1.7rem; }
}