:root {
    --stone:        #1a1714;
    --stone-mid:    #252018;
    --torch:        #c87a18;
    --torch-dim:    #8a5010;
    --torch-bright: #e8a030;
    --parchment:    #c8b888;
    --parchment-dim:#7a6840;
    --error-bright: #c44;
    --header-h:     56px;
    --footer-h:     56px;
  }

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

  html, body {
    width: 100%; height: 100%;
    overflow: hidden;
    background: var(--stone);
    font-family: 'Crimson Text', Georgia, serif;
    color: var(--parchment);
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
  }

  body::before {
    content: '';
    position: fixed; inset: 0; z-index: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.07'/%3E%3C/svg%3E");
    pointer-events: none;
  }

  body::after {
    content: '';
    position: fixed; inset: 0; z-index: 1;
    background: radial-gradient(ellipse at center, transparent 35%, rgba(0,0,0,0.88) 100%);
    pointer-events: none;
  }

  /* ── Header ── */
  #header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 10;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 0.75rem 1.25rem;
    border-bottom: 1px solid rgba(200,122,24,0.12);
    background: rgba(26,23,20,0.85);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }

  #ct-home {
    font-family: 'Cinzel', serif;
    font-size: clamp(0.45rem, 1.5vw, 0.55rem);
    letter-spacing: 0.18em;
    color: var(--torch-dim);
    text-transform: uppercase;
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.2s, color 0.2s;
    justify-self: start;
    white-space: nowrap;
  }
  #ct-home:hover { opacity: 1; color: var(--torch); }

  #header-center {
    display: flex; flex-direction: column;
    align-items: center; gap: 0.2rem;
    justify-self: center;
  }

  #site-title {
    font-family: 'Cinzel', serif;
    font-size: clamp(0.5rem, 1.8vw, 0.6rem);
    font-weight: 600;
    letter-spacing: 0.35em;
    color: var(--torch-dim);
    text-transform: uppercase;
  }

  #level-badge {
    font-family: 'Cinzel', serif;
    font-size: clamp(0.55rem, 2vw, 0.68rem);
    letter-spacing: 0.22em;
    color: var(--parchment-dim);
  }

  /* ── Arena ── */
  #arena {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    bottom: var(--footer-h);
    z-index: 2;
  }

  /* ── Footer ── */
  #footer {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    z-index: 10;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 1.5rem 0.7rem;
    border-top: 1px solid rgba(200,122,24,0.1);
    background: rgba(26,23,20,0.85);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }

  #footer-text {
    font-family: 'Cinzel', serif;
    font-size: clamp(0.55rem, 1.8vw, 0.7rem);
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--parchment-dim);
  }

  /* ── Shared CT button ── */
  .ct-btn {
    font-family: 'Cinzel', serif;
    font-size: clamp(0.6rem, 2vw, 0.75rem);
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--parchment-dim);
    background: transparent;
    border: 1px solid var(--torch-dim);
    padding: 0.75em 1.75em;
    border-radius: 2px;
    cursor: pointer;
    min-height: 44px;
    outline: none;
    transition: color 0.2s, border-color 0.2s, box-shadow 0.2s;
    white-space: nowrap;
  }
  .ct-btn:hover:not(:disabled) {
    color: var(--parchment);
    border-color: var(--torch);
    box-shadow: 0 0 16px rgba(200,122,24,0.25), inset 0 0 8px rgba(200,122,24,0.08);
  }
  .ct-btn:active:not(:disabled) { transform: scale(0.96); }
  .ct-btn:disabled { opacity: 0.4; cursor: default; }

  /* ── Pip track — lives inside footer ── */
  #pip-track {
    display: none;
    gap: clamp(5px, 1.5vw, 9px);
    align-items: center;
  }
  #pip-track.visible { display: flex; }

  .pip {
    width: clamp(7px, 1.8vw, 9px);
    height: clamp(7px, 1.8vw, 9px);
    border-radius: 50%;
    border: 1px solid var(--torch-dim);
    background: transparent;
    transition: background 0.25s, border-color 0.25s, box-shadow 0.25s;
  }
  .pip.lit {
    background: var(--torch);
    border-color: var(--torch-bright);
    box-shadow: 0 0 7px rgba(200,122,24,0.75);
  }

  /* ── Hitmarker ── */
  .hm {
    position: fixed; pointer-events: none; z-index: 200;
    width: 20px; height: 20px;
    transform: translate(-50%, -50%);
    animation: hm-out 0.45s ease-out forwards;
  }
  .hm-l, .hm-r, .hm-t, .hm-b {
    position: absolute; background: #fff;
    box-shadow: 0 0 2px rgba(232,160,48,1);
  }
  .hm-l { width:5px; height:1.5px; top:50%; left:0;    transform:translateY(-50%); }
  .hm-r { width:5px; height:1.5px; top:50%; right:0;   transform:translateY(-50%); }
  .hm-t { width:1.5px; height:5px; top:0;    left:50%; transform:translateX(-50%); }
  .hm-b { width:1.5px; height:5px; bottom:0; left:50%; transform:translateX(-50%); }

  /* ── Level 2 card ── */
  .l2-card {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
  }
  .l2-inner {
    display: flex; flex-direction: column;
    align-items: center;
    gap: clamp(1.2rem, 3vw, 2rem);
    width: min(520px, 90vw);
    padding: clamp(1.5rem, 4vw, 3rem) clamp(1.5rem, 5vw, 3.5rem);
    border: 1px solid rgba(200,122,24,0.12);
    background: rgba(26,23,20,0.5);
    position: relative;
  }
  .l2-inner::before {
    content:''; position:absolute; top:-1px; left:-1px;
    width:12px; height:12px;
    border-top:1px solid var(--torch-dim);
    border-left:1px solid var(--torch-dim);
    opacity:0.4;
  }
  .l2-inner::after {
    content:''; position:absolute; bottom:-1px; right:-1px;
    width:12px; height:12px;
    border-bottom:1px solid var(--torch-dim);
    border-right:1px solid var(--torch-dim);
    opacity:0.4;
  }
  .l2-directive {
    font-family: 'Cinzel', serif;
    font-size: clamp(0.75rem, 2.5vw, 1rem);
    letter-spacing: 0.12em;
    color: var(--parchment-dim);
    text-align: center;
    line-height: 1.6;
  }
  .l2-input-wrap { width:100%; display:flex; flex-direction:column; align-items:center; gap:0.5rem; }
  .l2-input {
    width: 100%;
    font-family: 'Crimson Text', Georgia, serif;
    font-size: clamp(0.9rem, 2.5vw, 1.1rem);
    letter-spacing: 0.06em;
    color: var(--parchment);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--torch-dim);
    border-radius: 2px;
    padding: 0.7em 1em;
    outline: none; text-align: center;
    caret-color: var(--torch);
    user-select: text; -webkit-user-select: text;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  }
  .l2-input::placeholder { color:var(--parchment-dim); opacity:0.35; font-style:italic; }
  .l2-input:focus {
    border-color: rgba(200,122,24,0.5);
    box-shadow: 0 0 12px rgba(200,122,24,0.12), inset 0 0 6px rgba(200,122,24,0.05);
    background: rgba(255,255,255,0.05);
  }
  .l2-input.error {
    border-color: var(--error-bright);
    box-shadow: 0 0 10px rgba(200,60,60,0.2);
    animation: shake 0.35s ease;
  }
  .l2-input.correct {
    border-color: var(--torch-bright);
    box-shadow: 0 0 16px rgba(200,122,24,0.4), inset 0 0 8px rgba(200,122,24,0.1);
  }
  .l2-hint {
    font-family:'Crimson Text',serif; font-size:clamp(0.7rem,2vw,0.8rem);
    font-style:italic; color:var(--parchment-dim);
    opacity:0; letter-spacing:0.05em;
    transition:opacity 0.5s ease;
    text-align:center; min-height:1.2em;
  }
  .l2-hint.visible { opacity:0.55; }

  /* ── Level 3: free gift ── */
  .l3-card {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    padding: 2rem;
  }
  .l3-inner {
    display: flex; flex-direction: column;
    align-items: center;
    gap: clamp(1.2rem, 3vw, 1.8rem);
    width: min(520px, 90vw);
    text-align: center;
  }
  .l3-headline {
    font-family: 'Cinzel', serif;
    font-size: clamp(1.1rem, 4vw, 1.6rem);
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--torch-bright);
    text-shadow: 0 0 20px rgba(200,122,24,0.35);
  }
  .l3-subline {
    font-family: 'Crimson Text', serif;
    font-size: clamp(0.9rem, 2.5vw, 1.1rem);
    color: var(--parchment-dim);
    letter-spacing: 0.05em;
    line-height: 1.6;
  }
  .l3-reward-img {
    width: min(280px, 80vw);
    height: min(280px, 80vw);
    object-fit: cover;
    border: 1px solid rgba(200,122,24,0.2);
    border-radius: 2px;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s ease, transform 0.6s ease;
    box-shadow: 0 0 30px rgba(200,122,24,0.15);
  }
  .l3-reward-img.revealed {
    opacity: 1;
    transform: scale(1);
  }

  /* ── Complete overlay ── */
  #complete {
    position: fixed; inset: 0; z-index: 300;
    display: none;
    flex-direction: column; align-items: center; justify-content: center;
    gap: clamp(1rem, 3vw, 1.5rem);
    padding: 2rem;
    background: rgba(26,23,20,0.92);
    backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  }
  #complete.show { display:flex; animation:fade-in 0.6s ease; }

  #complete-title {
    font-family: 'Cinzel', serif;
    font-size: clamp(1.3rem, 6vw, 2.2rem);
    font-weight: 700; letter-spacing: 0.15em;
    color: var(--torch-bright);
    text-shadow: 0 0 30px rgba(200,122,24,0.6);
    text-align: center;
  }
  #complete-sub {
    font-family: 'Crimson Text', serif;
    font-size: clamp(0.9rem, 2.5vw, 1rem);
    color: var(--parchment-dim);
    letter-spacing: 0.05em; text-align: center;
  }
  #ct-exit {
    font-family:'Crimson Text',serif;
    font-size:clamp(0.7rem,2vw,0.8rem);
    font-style:italic; letter-spacing:0.08em;
    color:var(--parchment-dim); text-decoration:none;
    opacity:0.45; transition:opacity 0.2s; margin-top:0.25rem;
  }
  #ct-exit:hover { opacity:0.8; }

  /* ── Transition ── */
  #transition {
    position: fixed; inset: 0; z-index: 500;
    background: var(--stone);
    opacity: 0; pointer-events: none;
    transition: opacity 0.35s ease;
  }
  #transition.fade-in { opacity:1; pointer-events:all; }

  /* ── Animations ── */
  @keyframes fade-in { from{opacity:0} to{opacity:1} }
  @keyframes hm-out  { 0%,60%{opacity:1} 100%{opacity:0} }
  @keyframes shake {
    0%,100%{transform:translateX(0)}
    20%{transform:translateX(-6px)}
    40%{transform:translateX(6px)}
    60%{transform:translateX(-4px)}
    80%{transform:translateX(4px)}
  }

/* ── Level 4: reverse tetris ── */
.l4-card {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.l4-inner {
  display: flex; flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
#l4-canvas {
  display: block;
  image-rendering: pixelated;
}
.l4-controls {
  display: flex;
  gap: 1.5rem;
}