:root {
    --bg: #0a0a14;
    --panel: #12121f;
    --accent: #00f0ff;
    --accent2: #ff00c8;
    --gold: #ffd700;
    --tile-bg: #1a1a30;
    --tile-hover: #252545;
    --tile-selected: #00f0ff22;
    --tile-border: #2a2a50;
    --text: #e0e0ff;
    --dim: #5a5a8a;
  }

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

  body {

    font-family: 'Rajdhani', sans-serif;
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow-x: hidden;
   
     background-color: #0a0a14;
    background-image: 
    linear-gradient(#00f0ff08 1px, transparent 1px),
    linear-gradient(90deg, #00f0ff08 1px, transparent 1px);
    background-size: 40px 40px;
}
  

  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
      radial-gradient(ellipse at 20% 20%, #00f0ff0a 0%, transparent 60%),
      radial-gradient(ellipse at 80% 80%, #ff00c80a 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
  }

  h1 {
    font-family: 'Orbitron', monospace;
    font-size: clamp(1.4rem, 4vw, 2.2rem);
    font-weight: 900;
    letter-spacing: 4px;
    text-transform: uppercase;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 18px;
    position: relative;
    z-index: 1;
  }

  .hud {
    display: flex;
    gap: 24px;
    margin-bottom: 18px;
    flex-wrap: wrap;
    justify-content: center;
    position: relative;
    z-index: 1;
  }

  .hud-item {
    background: var(--panel);
    border: 1px solid var(--tile-border);
    border-radius: 10px;
    padding: 8px 20px;
    text-align: center;
    min-width: 90px;
  }

  .hud-label {
    font-size: 0.7rem;
    letter-spacing: 2px;
    color: var(--dim);
    text-transform: uppercase;
  }

  .hud-value {
    font-family: 'Orbitron', monospace;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
  }

  .hud-value.gold { color: var(--gold); }
  .hud-value.pink { color: var(--accent2); }

  /* Level progress bar */
  .level-progress {
    width: 100%;
    max-width: 500px;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
  }

  .progress-track {
    height: 6px;
    background: var(--panel);
    border-radius: 3px;
    overflow: hidden;
    border: 1px solid var(--tile-border);
  }

  .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    border-radius: 3px;
    transition: width 0.5s ease;
  }

  .progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--dim);
    margin-top: 4px;
    letter-spacing: 1px;
  }

  /* Grid */
  #grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    background: var(--panel);
    border: 1px solid var(--tile-border);
    border-radius: 14px;
    padding: 10px;
    max-width: 500px;
    width: 100%;
    transition: transform 0.5s ease;
    position: relative;
    z-index: 1;
    box-shadow: 0 0 40px #00f0ff10;
  }

  .tile {
    aspect-ratio: 1;
    background: var(--tile-bg);
    border: 1px solid var(--tile-border);
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', monospace;
    font-size: clamp(1.2rem, 1.5vw, 0.75rem);
    font-weight: 700;
    color: var(--text);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, transform 0.1s, box-shadow 0.15s;
    user-select: none;
  }

  .tile:hover:not(.empty) {
    background: var(--tile-hover);
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent)44;
    transform: scale(1.06);
  }

  .tile.selected {
    background: var(--tile-selected);
    border-color: var(--accent);
    box-shadow: 0 0 14px var(--accent)88;
    color: var(--accent);
  }

  .tile.empty {
    background: transparent;
    border-color: #1a1a30;
    cursor: default;
  }

  /* Correct position highlight */
  .tile.correct {
    border-color: #00ff8844;
    color: #00ff88;
  }

  /* Buttons */
  .buttons {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
    justify-content: center;
    position: relative;
    z-index: 1;
  }

  button {
    font-family: 'Orbitron', monospace;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 10px 22px;
    border-radius: 8px;
    border: 1px solid var(--accent);
    background: transparent;
    color: var(--accent);
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s, transform 0.1s;
  }

  button:hover {
    background: var(--accent)15;
    box-shadow: 0 0 16px var(--accent)55;
    transform: translateY(-1px);
  }

  button:active { transform: translateY(0); }

  button.btn-spin {
    border-color: var(--gold);
    color: var(--gold);
  }

  button.btn-spin:hover {
    background: var(--gold)15;
    box-shadow: 0 0 16px var(--gold)55;
  }

  #message {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--dim);
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
    min-height: 20px;
  }

  /* Celebration overlay */
  #celebration {
    position: fixed;
    inset: 0;
    background: #00000099;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
  }

  #celebration.hidden { display: none; }

  .celebration-box {
    background: var(--panel);
    border: 2px solid var(--accent);
    border-radius: 20px;
    padding: 40px 60px;
    text-align: center;
    box-shadow: 0 0 60px var(--accent)44;
    position: relative;
    z-index: 101;
  }

  .celebration-title {
    font-family: 'Orbitron', monospace;
    font-size: clamp(1.4rem, 5vw, 2.5rem);
    font-weight: 900;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
  }

  .celebration-sub {
    font-size: 1rem;
    color: var(--dim);
    letter-spacing: 2px;
  }

  /* Game Over overlay */
  #gameover {
    position: fixed;
    inset: 0;
    background: #00000099;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
  }

  #gameover.hidden { display: none; }

  .gameover-box {
    background: var(--panel);
    border: 2px solid var(--accent2);
    border-radius: 20px;
    padding: 40px 60px;
    text-align: center;
    box-shadow: 0 0 60px var(--accent2)44;
    position: relative;
    z-index: 101;
  }

  .gameover-title {
    font-family: 'Orbitron', monospace;
    font-size: clamp(1.4rem, 5vw, 2.5rem);
    font-weight: 900;
    color: var(--accent2);
    margin-bottom: 10px;
  }

  .gameover-sub {
    font-size: 1rem;
    color: var(--dim);
    letter-spacing: 1px;
    margin-bottom: 20px;
  }

  .gameover-box button {
    border-color: var(--accent2);
    color: var(--accent2);
  }

  .gameover-box button:hover {
    background: var(--accent2)15;
    box-shadow: 0 0 16px var(--accent2)55;
  }

  canvas#confettiCanvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 99;
  }

  /* Countdown bar */
  .countdown-wrap {
    width: 100%;
    max-width: 500px;
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
  }
  .countdown-track {
    height: 10px;
    background: var(--panel);
    border-radius: 5px;
    overflow: hidden;
    border: 1px solid var(--tile-border);
  }
  .countdown-fill {
    height: 100%;
    border-radius: 5px;
    transition: width 1s linear, background 0.5s;
  }
  .countdown-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--dim);
    margin-top: 4px;
    letter-spacing: 1px;
  }
  @keyframes flashShuffle {
    0%   { box-shadow: 0 0 0px var(--accent2); }
    40%  { box-shadow: 0 0 35px var(--accent2); }
    100% { box-shadow: 0 0 40px #00f0ff10; }
  }
  .shuffle-flash { animation: flashShuffle 0.5s ease; }

  /* Balloons */
  .balloon {
    position: fixed;
    bottom: -120px;
    width: 60px;
    height: 75px;
    border-radius: 50% 50% 50% 50% / 55% 55% 45% 45%;
    animation: floatUp 4s ease-in forwards;
    pointer-events: none;
    z-index: 200;
    filter: drop-shadow(0 4px 8px #0008);
  }
  .balloon::after {
    content: '';
    position: absolute;
    bottom: -18px;
    left: 50%;
    transform: translateX(-50%);
    width: 1.5px;
    height: 20px;
    background: #ffffff88;
  }
  @keyframes floatUp {
    0%   { bottom: -120px; opacity: 1; transform: translateX(0) rotate(0deg); }
    20%  { opacity: 1; }
    50%  { transform: translateX(var(--sway)); }
    80%  { opacity: 0.8; }
    100% { bottom: 110vh; opacity: 0; transform: translateX(calc(var(--sway) * -1)) rotate(5deg); }
  }
  /* Mobile tweaks */
  @media (max-width: 480px) {
    body { padding: 10px 6px; justify-content: flex-start; padding-top: 16px; }
    h1 { margin-bottom: 10px; }
    .buttons { gap: 8px; }
    .title{ font-size: clamp(1.7rem, 1.5vw, 0.75rem);}
    .tile:hover:not(.empty) { transform: none; }
     #grid { grid-template-columns: repeat(5, 1fr);}

  }