/* ==============================
   RESET & VARIABLES
   ============================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:      #07071a;
  --bg2:     #0d0d28;
  --bg3:     #14143a;
  --border:  #2a2a55;
  --text:    #dde0ff;
  --text2:   #7070aa;
  --gold:    #ffd700;
  --green:   #00e676;
  --red:     #ff4444;
  --radius:  14px;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

#app {
  position: relative;
  width: 100%; height: 100%;
}

button { cursor: pointer; font-family: inherit; }
input  { font-family: inherit; }

/* ==============================
   SCREENS
   ============================== */
.screen {
  position: absolute;
  inset: 0;
  display: none;
  overflow-y: auto;
  overflow-x: hidden;
}
.screen.active { display: block; }

/* ==============================
   SELECT SCREEN
   ============================== */
.select-inner {
  max-width: 580px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.game-logo {
  font-size: 3rem;
  font-weight: 900;
  text-align: center;
  line-height: 1.05;
  background: linear-gradient(135deg, #ffd700 0%, #ff6b6b 60%, #a29bfe 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.05em;
}
.game-logo span {
  font-size: 1.9rem;
  letter-spacing: 0.22em;
}

/* Name input */
.name-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  max-width: 380px;
}
.name-row label {
  font-size: 0.85rem;
  color: var(--text2);
  white-space: nowrap;
}
#player-name {
  flex: 1;
  background: var(--bg3);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
  padding: 0.55rem 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}
#player-name:focus { border-color: var(--gold); }
#player-name.error { border-color: var(--red); animation: shake 0.3s; }

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-5px); }
  75%      { transform: translateX(5px); }
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  width: 100%;
  text-align: center;
}

/* Character grid */
.char-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  width: 100%;
}

.char-card {
  background: var(--bg2);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1rem 1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.45rem;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.2s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.char-card:hover {
  transform: translateY(-4px);
  border-color: var(--c, #fff);
  box-shadow: 0 6px 28px color-mix(in srgb, var(--c, #fff) 25%, transparent);
}
.char-card:active { transform: scale(0.96); }

.char-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 32%, var(--c), var(--c2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
  box-shadow: 0 0 22px color-mix(in srgb, var(--c) 50%, transparent);
  margin-bottom: 0.2rem;
}

.char-name { font-size: 1.2rem; font-weight: 700; }

.char-stars {
  color: var(--gold);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.char-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
}
.char-badge.hard     { background: #3d0000; color: var(--red); border: 1px solid #7a0000; }
.char-badge.normal   { background: #1a0040; color: #a29bfe; border: 1px solid #4a2aaa; }
.char-badge.easy     { background: #003328; color: #55efc4; border: 1px solid #007755; }
.char-badge.beginner { background: #3d2a00; color: var(--gold); border: 1px solid #7a5500; }

/* Leaderboard */
.leaderboard-box {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.leaderboard-box h2,
.leaderboard-box h3 {
  text-align: center;
}

.rank-tabs {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
}
.rank-tab {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text2);
  font-size: 0.82rem;
  padding: 0.3rem 1.1rem;
  transition: all 0.18s;
}
.rank-tab.active {
  background: var(--gold);
  color: #000;
  border-color: var(--gold);
  font-weight: 700;
}
.rank-tab:hover:not(.active) {
  border-color: var(--text2);
  color: var(--text);
}

.rank-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.rank-list li {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.6rem 1rem;
  background: var(--bg3);
  border-radius: 10px;
  font-size: 0.88rem;
  border: 1px solid transparent;
  transition: border-color 0.2s;
}
.rank-list li.highlight { border-color: var(--gold); }
.rank-list li .rk-num  { font-weight: 700; width: 1.6rem; text-align: center; color: var(--text2); }
.rank-list li .rk-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-list li .rk-score{ font-weight: 700; color: var(--gold); }
.rank-list li:nth-child(1) .rk-num { color: #ffd700; font-size: 1rem; }
.rank-list li:nth-child(2) .rk-num { color: #c0c0c0; }
.rank-list li:nth-child(3) .rk-num { color: #cd7f32; }

.rank-empty {
  text-align: center;
  color: var(--text2);
  padding: 1.2rem;
  font-size: 0.85rem;
}
.rank-status {
  text-align: center;
  color: var(--text2);
  font-size: 0.82rem;
  animation: pulse 1.5s infinite;
}

/* ==============================
   GAME SCREEN / HUD
   ============================== */
#screen-game {
  overflow: hidden;
  background: var(--bg);
}

#hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 10;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 0.8rem 1.4rem;
  background: linear-gradient(to bottom, rgba(0,0,0,0.75) 0%, transparent 100%);
  pointer-events: none;
}

.hud-left {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
#hud-char-name {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
#hud-time {
  font-size: 0.75rem;
  color: var(--text2);
  font-variant-numeric: tabular-nums;
}

.hud-center {
  position: absolute;
  left: 50%; top: 0.7rem;
  transform: translateX(-50%);
  text-align: center;
  pointer-events: none;
}
#score-val {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 20px rgba(255,215,0,0.55);
  font-variant-numeric: tabular-nums;
}

.hud-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  min-width: 110px;
}
.hud-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  color: #74b9ff;
  font-weight: 600;
}
.hud-item.hidden { display: none; }
.timer-bar {
  width: 70px;
  height: 7px;
  background: rgba(255,255,255,0.12);
  border-radius: 999px;
  overflow: hidden;
}
#magnet-fill, #invinc-fill {
  height: 100%;
  width: 100%;
  border-radius: 999px;
  transition: width 0.15s linear;
}
#magnet-fill { background: linear-gradient(90deg, #74b9ff, #0984e3); }

.hud-upgrades {
  font-size: 0.78rem;
  font-weight: 700;
  color: #ffd700;
  text-align: right;
  letter-spacing: 0.05em;
  min-height: 1.1em;
  text-shadow: 0 0 8px rgba(255,215,0,0.6);
}

#canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#pause-overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
}
#pause-overlay.hidden { display: none; }
.pause-box { text-align: center; }
.pause-title { font-size: 2.5rem; font-weight: 900; letter-spacing: 0.1em; }
.pause-hint  { font-size: 0.9rem; color: var(--text2); margin-top: 0.5rem; }

/* ==============================
   GAME OVER SCREEN
   ============================== */
.go-inner {
  max-width: 500px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.6rem;
}

.go-title {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--red);
  text-shadow: 0 0 40px rgba(255,68,68,0.5);
  letter-spacing: 0.12em;
}

#go-char-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 1.15rem;
  font-weight: 700;
}
.go-char-icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 32%, var(--c), var(--c2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 900;
  color: #fff;
  box-shadow: 0 0 18px color-mix(in srgb, var(--c) 50%, transparent);
}

.go-score-block { text-align: center; }
.go-score-label {
  font-size: 0.78rem;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 0.3rem;
}
#go-score-val {
  font-size: 4rem;
  font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 30px rgba(255,215,0,0.45);
  font-variant-numeric: tabular-nums;
}

#go-new-rec {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--green);
  animation: pulse 1s infinite;
}
#go-new-rec.hidden { display: none; }

.go-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, #ffd700, #ff6b6b);
  border: none;
  border-radius: 999px;
  color: #000;
  font-size: 1rem;
  font-weight: 700;
  padding: 0.8rem 2.2rem;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 24px rgba(255,215,0,0.4);
}
.btn-primary:active { transform: scale(0.96); }

.btn-secondary {
  background: var(--bg3);
  border: 1.5px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-size: 1rem;
  padding: 0.8rem 2.2rem;
  transition: all 0.15s;
}
.btn-secondary:hover { border-color: var(--text2); background: var(--bg2); }
.btn-secondary:active { transform: scale(0.96); }

/* ==============================
   MUTE BUTTON (fixed, all screens)
   ============================== */
#mute-btn {
  position: fixed;
  top: 0.7rem;
  right: 0.8rem;
  z-index: 100;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
}
#mute-btn:hover  { background: rgba(255,255,255,0.18); }
#mute-btn:active { transform: scale(0.9); }

/* ==============================
   ANIMATIONS
   ============================== */
@keyframes pulse {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.45; }
}

/* ==============================
   RESPONSIVE
   ============================== */
@media (max-width: 480px) {
  .game-logo { font-size: 2.4rem; }
  .game-logo span { font-size: 1.5rem; }
  .char-icon { width: 58px; height: 58px; font-size: 1.6rem; }
  .char-grid { gap: 0.7rem; }
  #score-val { font-size: 1.8rem; }
  #go-score-val { font-size: 3rem; }
  .go-title { font-size: 2.5rem; }
}