/* ─── Gravity Flip — Stylesheet ────────────────────────────────────────────── */
/* Original synthwave/neon aesthetic. No Mario assets. */

:root {
  --c-bg:       #0d0d2b;
  --c-surface:  #1a1040;
  --c-surface2: #241560;
  --c-neon1:    #e040fb;
  --c-neon2:    #00e5ff;
  --c-accent:   #6c35de;
  --c-text:     #e8e0ff;
  --c-textDim:  #9e93c8;
  --c-gold:     #ffd740;
  --c-danger:   #ff3e6c;
  --radius:     14px;
  --safe-top:   env(safe-area-inset-top, 0px);
  --safe-bot:   env(safe-area-inset-bottom, 0px);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--c-bg);
  font-family: 'Fredoka One', 'Nunito', system-ui, sans-serif;
  color: var(--c-text);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  touch-action: none;
}

/* ─── Canvas ──────────────────────────────────────────────────────────────── */

#gameCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

/* ─── Screens ─────────────────────────────────────────────────────────────── */

.screen {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13, 13, 43, 0.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.screen.active {
  opacity: 1;
  pointer-events: all;
}

.screen.hidden { display: none; }
.hidden { display: none !important; }

.screen-inner {
  width: 100%;
  max-width: 420px;
  padding: 24px 20px calc(24px + var(--safe-bot));
  padding-top: calc(20px + var(--safe-top));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

/* ─── Home screen ─────────────────────────────────────────────────────────── */

.home-inner { gap: 18px; }

.logo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.game-title {
  font-size: 52px;
  font-weight: 900;
  letter-spacing: 6px;
  text-align: center;
  width: 100%;
  background: linear-gradient(135deg, var(--c-neon2), var(--c-neon1));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
  filter: drop-shadow(0 0 18px rgba(0,229,255,0.5));
  line-height: 1;
}

.tagline {
  font-size: 15px;
  color: var(--c-textDim);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* BOLT logo SVG */
.bolt-logo {
  width: 72px;
  height: 72px;
  filter: drop-shadow(0 0 16px rgba(0,229,255,0.6));
}

.home-controls-hint {
  background: rgba(108,53,222,0.18);
  border: 1px solid rgba(108,53,222,0.35);
  border-radius: var(--radius);
  padding: 12px 18px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hint-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--c-textDim);
}

.key {
  background: var(--c-accent);
  color: #fff;
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 12px;
  letter-spacing: 1px;
  font-weight: 700;
  min-width: 52px;
  text-align: center;
}

/* ─── Buttons ─────────────────────────────────────────────────────────────── */

.btn-primary {
  width: 100%;
  padding: 18px;
  border: none;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--c-neon2), var(--c-accent));
  color: #fff;
  font-family: inherit;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 4px;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(0,229,255,0.35);
  transition: transform 0.1s, box-shadow 0.1s;
}

.btn-primary:active {
  transform: scale(0.97);
  box-shadow: 0 2px 12px rgba(0,229,255,0.2);
}

.home-menu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}

.btn-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 8px;
  border: 1px solid rgba(108,53,222,0.5);
  border-radius: var(--radius);
  background: var(--c-surface);
  color: var(--c-text);
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.btn-menu:active { transform: scale(0.96); background: var(--c-surface2); }

.btn-menu-icon { font-size: 22px; }

.home-bottom-row {
  display: flex;
  gap: 10px;
  width: 100%;
  align-items: center;
}

.btn-set-name {
  flex: 1;
}

.btn-sound {
  background: var(--c-surface);
  border: 1px solid rgba(108,53,222,0.5);
  font-size: 22px;
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s, transform 0.1s;
  flex-shrink: 0;
}
.btn-sound:active { opacity: 0.7; transform: scale(0.96); }

.btn-icon {
  background: transparent;
  border: none;
  font-size: 22px;
  cursor: pointer;
  padding: 4px;
  border-radius: 8px;
  transition: opacity 0.15s;
}
.btn-icon:active { opacity: 0.6; }

.btn-secondary {
  width: 100%;
  padding: 14px;
  border: 1.5px solid var(--c-accent);
  border-radius: var(--radius);
  background: transparent;
  color: var(--c-neon2);
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn-secondary:active { transform: scale(0.97); background: rgba(108,53,222,0.15); }

.btn-danger {
  background: transparent;
  border: 1.5px solid var(--c-danger);
  color: var(--c-danger);
  width: 100%;
  padding: 14px;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.btn-danger:active { transform: scale(0.97); background: rgba(255,62,108,0.1); }

/* ─── HUD ─────────────────────────────────────────────────────────────────── */

.hud {
  position: fixed;
  top: calc(16px + var(--safe-top));
  left: 16px;
  right: 16px;
  z-index: 20;
  display: flex;
  gap: 16px;
  align-items: center;
  pointer-events: none;
}

.hud.hidden { display: none; }

.hud.tier-up {
  animation: tierFlash 0.6s ease-out;
}
@keyframes tierFlash {
  0%   { filter: drop-shadow(0 0 0px transparent); }
  30%  { filter: drop-shadow(0 0 18px var(--c-neon1)); }
  100% { filter: drop-shadow(0 0 0px transparent); }
}

.hud-block {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hud-label {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--c-textDim);
}

.hud-value {
  font-size: 28px;
  font-weight: 900;
  color: var(--c-gold);
  text-shadow: 0 0 10px rgba(255,215,64,0.5);
  line-height: 1;
}

.hud-score { flex: 1; }
.hud-best  { margin-left: auto; }

/* ─── Game Over screen ────────────────────────────────────────────────────── */

.go-inner { gap: 20px; }

.go-title {
  font-size: 40px;
  font-weight: 900;
  letter-spacing: 4px;
  color: var(--c-danger);
  text-shadow: 0 0 20px rgba(255,62,108,0.5);
  text-transform: uppercase;
}

.go-scores {
  display: flex;
  gap: 32px;
  justify-content: center;
}

.go-score-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.go-label {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--c-textDim);
}

.go-value {
  font-size: 36px;
  font-weight: 900;
  color: var(--c-gold);
  text-shadow: 0 0 12px rgba(255,215,64,0.4);
}

.go-best .go-value { color: var(--c-neon1); text-shadow: 0 0 12px rgba(224,64,251,0.4); }

.go-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

/* ─── Section title ───────────────────────────────────────────────────────── */

.section-title {
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 3px;
  color: var(--c-neon2);
  text-transform: uppercase;
  align-self: flex-start;
}

/* ─── Form fields ─────────────────────────────────────────────────────────── */

.field-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
}

.field-label {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--c-textDim);
  text-transform: uppercase;
}

.field-input {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid rgba(108,53,222,0.5);
  border-radius: var(--radius);
  background: var(--c-surface);
  color: var(--c-text);
  font-family: inherit;
  font-size: 16px;
  font-weight: 700;
  outline: none;
  transition: border-color 0.15s;
}

.field-input:focus { border-color: var(--c-neon2); }
.field-input::placeholder { color: var(--c-textDim); font-weight: 400; }

/* ─── Leaderboard tabs ────────────────────────────────────────────────────── */

.lb-tabs {
  display: flex;
  width: 100%;
  gap: 8px;
}

.lb-tab {
  flex: 1;
  padding: 10px;
  border: 1.5px solid rgba(108,53,222,0.5);
  border-radius: var(--radius);
  background: transparent;
  color: var(--c-textDim);
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.lb-tab.active {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

/* ─── Leaderboard list ────────────────────────────────────────────────────── */

.lb-list {
  width: 100%;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 50vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.lb-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: var(--c-surface);
  border-radius: 10px;
  border: 1px solid rgba(108,53,222,0.25);
  font-size: 15px;
  transition: background 0.15s;
}

.lb-row.lb-me {
  background: rgba(0,229,255,0.1);
  border-color: var(--c-neon2);
}

.lb-rank {
  width: 26px;
  text-align: center;
  font-size: 13px;
  color: var(--c-textDim);
  font-weight: 700;
}

.lb-row:nth-child(1) .lb-rank { color: var(--c-gold); font-size: 18px; }
.lb-row:nth-child(2) .lb-rank { color: #b0bec5; }
.lb-row:nth-child(3) .lb-rank { color: #ff8a65; }

.lb-name  { flex: 1; font-weight: 700; color: var(--c-text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lb-score { font-size: 18px; font-weight: 900; color: var(--c-gold); }
.lb-code  { margin-left: auto; font-size: 12px; color: var(--c-textDim); letter-spacing: 2px; background: var(--c-surface2); padding: 2px 8px; border-radius: 6px; }

.lb-loading, .lb-empty {
  padding: 20px;
  text-align: center;
  color: var(--c-textDim);
  font-size: 14px;
}

.league-row { cursor: pointer; }
.league-row:active { background: var(--c-surface2); }

/* ─── Invite screen ───────────────────────────────────────────────────────── */

.invite-code-box {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 24px;
  background: var(--c-surface);
  border: 2px solid var(--c-neon1);
  border-radius: var(--radius);
}

.invite-code-label { font-size: 12px; letter-spacing: 2px; color: var(--c-textDim); text-transform: uppercase; }

.invite-code {
  font-size: 34px;
  font-weight: 900;
  letter-spacing: 6px;
  color: var(--c-neon1);
  text-shadow: 0 0 16px rgba(224,64,251,0.5);
}

/* ─── League detail code row ─────────────────────────────────────────────── */

.league-detail-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-self: flex-start;
}

.league-detail-name { font-size: 20px; font-weight: 900; color: var(--c-neon2); }
.league-detail-code { font-size: 13px; letter-spacing: 3px; color: var(--c-textDim); }

/* ─── Gravity indicator (in-game) ────────────────────────────────────────── */

.gravity-indicator {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 20;
  width: 28px;
  height: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  pointer-events: none;
}

.grav-arrow {
  font-size: 18px;
  opacity: 0.35;
  transition: opacity 0.15s, color 0.15s;
}

.grav-arrow.active { opacity: 1; color: var(--c-neon2); filter: drop-shadow(0 0 4px var(--c-neon2)); }

/* ─── Responsive tweaks ───────────────────────────────────────────────────── */

@media (max-height: 640px) {
  .game-title { font-size: 38px; }
  .home-inner { gap: 12px; }
  .btn-primary { padding: 14px; font-size: 18px; }
}