.btn-primary, .btn-secondary, .btn-ghost {
  padding: 14px 22px;
  border-radius: 12px;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.5px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--purple), #a37bff);
  color: #fff;
  box-shadow: 0 6px 20px rgba(124,92,255,0.45);
}
.btn-primary:disabled { opacity: 0.4; box-shadow: none; }
.btn-secondary {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.18);
}
.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  text-decoration: underline;
}

/* ---------- Menu ---------- */
#screen-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 16px 20px;
  gap: 16px;
}
.menu-title {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 0.95;
  background: linear-gradient(180deg, #fff, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 40px rgba(77,216,255,0.35);
  letter-spacing: 2px;
}
.menu-castle { font-size: 2.6rem; margin: 4px 0; }
.menu-tagline { color: var(--text-dim); font-size: 0.95rem; max-width: 340px; }
.menu-buttons { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 300px; margin-top: 10px; }
.menu-toggles { display: flex; gap: 12px; margin-top: 6px; }
.menu-bests {
  display: flex; gap: 24px;
  margin-top: 18px;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.menu-bests strong { display: block; color: var(--gold); font-size: 1.05rem; }
.menu-links { margin-top: 8px; }

/* ---------- Modals (shared) ---------- */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(4,4,12,0.78);
  display: flex; align-items: center; justify-content: center;
  z-index: 40;
  padding: 16px;
}
.modal-box {
  background: var(--navy2);
  border: 1px solid rgba(124,92,255,0.35);
  border-radius: 16px;
  padding: 22px 20px;
  max-width: 440px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  /* Defense-in-depth: these modals are meant to scroll normally on touch
     even though the game board elsewhere uses touch-action:none to stop
     mid-game panning/zooming. */
  touch-action: pan-y;
}
.modal-box h2 { color: var(--gold); font-size: 1.2rem; margin-bottom: 12px; }
.modal-close-row { text-align: right; margin-top: 14px; }

/* Upgrade choice modal (in-game, not fixed backdrop dimming whole page since gameplay is paused visually) */
#upgrade-modal { z-index: 20; }
#upgrade-modal .modal-box { text-align: center; }
.upgrade-cards { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 6px; }
.upgrade-card {
  display: flex; align-items: center; gap: 12px;
  text-align: left;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(124,92,255,0.4);
  border-radius: 12px;
  padding: 12px 14px;
}
.upgrade-card:hover { background: rgba(124,92,255,0.15); }
.upgrade-card.risky { border-color: rgba(255,77,94,0.6); }
.upgrade-card .uc-icon { font-size: 1.6rem; }
.upgrade-card .uc-title { font-weight: 800; display: block; }
.upgrade-card .uc-desc { font-size: 0.8rem; color: var(--text-dim); display: block; }
.upgrade-cards.big .upgrade-card { border-width: 2px; }

/* How to play */
.howtoplay-body { color: var(--text-dim); font-size: 0.9rem; line-height: 1.6; }
.howtoplay-body h3 { color: var(--text); margin: 12px 0 4px; font-size: 0.95rem; }

/* ---------- Tutorial ---------- */
#screen-tutorial {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(4,4,12,0.9);
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
}
.tutorial-box {
  background: var(--navy2);
  border: 1px solid rgba(255,209,102,0.4);
  border-radius: 16px;
  padding: 26px 22px;
  max-width: 380px;
  text-align: center;
}
.tutorial-box h2 { color: var(--gold); font-size: 1.3rem; margin-bottom: 10px; }
.tutorial-box p { color: var(--text-dim); margin-bottom: 8px; line-height: 1.6; }
.tutorial-box button { margin-top: 14px; width: 100%; }

/* ---------- Game Over ---------- */
#screen-gameover {
  max-width: 460px;
  margin: 30px auto;
  text-align: center;
  padding: 24px 18px;
  background: var(--navy2);
  border-radius: 18px;
  border: 1px solid rgba(255,77,94,0.3);
}
.go-title { font-size: 1.6rem; font-weight: 900; color: var(--red); letter-spacing: 1px; margin-bottom: 10px; }
.go-stats { display: flex; justify-content: center; gap: 28px; margin: 14px 0; }
.go-stats .stat-label { font-size: 0.75rem; color: var(--text-dim); }
.go-stats .stat-value { font-size: 1.5rem; font-weight: 800; color: var(--gold); }
.go-newbest { color: var(--green); font-weight: 800; margin-bottom: 10px; }
.go-nickname-row { display: flex; gap: 8px; margin: 16px 0 6px; }
.go-nickname-row input {
  flex: 1; padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.06);
  color: var(--text);
}
.status-error { color: var(--red); font-size: 0.8rem; margin-top: 6px; display: block; }
.status-ok { color: var(--green); font-size: 0.8rem; margin-top: 6px; display: block; }
.go-buttons { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.go-share-row { margin-top: 10px; }

/* ---------- Leaderboard ---------- */
#screen-leaderboard {
  max-width: 460px;
  margin: 30px auto;
  padding: 20px 16px;
  background: var(--navy2);
  border-radius: 18px;
  border: 1px solid rgba(124,92,255,0.3);
}
#screen-leaderboard h2 { text-align: center; color: var(--gold); margin-bottom: 12px; }
.lb-tabs { display: flex; gap: 6px; margin-bottom: 12px; }
.lb-tabs button {
  flex: 1; padding: 8px; border-radius: 8px;
  background: rgba(255,255,255,0.05);
  font-size: 0.8rem;
  color: var(--text-dim);
}
.lb-tabs button.active { background: var(--purple); color: #fff; }
.lb-row {
  display: grid; grid-template-columns: 34px 1fr auto;
  align-items: center;
  padding: 8px 6px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.lb-row.me { background: rgba(124,92,255,0.15); border-radius: 8px; }
.lb-rank { font-weight: 800; }
.lb-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-score { color: var(--gold); font-weight: 700; }
.lb-empty { text-align: center; color: var(--text-dim); padding: 20px 0; }
.lb-close-row { text-align: center; margin-top: 14px; }

/* ---------- Daily ---------- */
#screen-daily {
  max-width: 460px;
  margin: 30px auto;
  padding: 22px 18px;
  background: var(--navy2);
  border-radius: 18px;
  border: 1px solid rgba(255,209,102,0.3);
  text-align: center;
}
#daily-info { color: var(--text-dim); margin-bottom: 16px; line-height: 1.6; }
.daily-lb { margin: 16px 0; }
.daily-lb h3 { font-size: 0.85rem; color: var(--gold); margin-bottom: 6px; }