:root{
  --bg:#0a0a1a; --ink:#e9e9ff; --cyan:#00e5ff; --magenta:#ff2db4; --yellow:#ffde00;
  --panel:#140a26; --safe-t:env(safe-area-inset-top,0px); --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box; margin:0; padding:0; -webkit-tap-highlight-color:transparent;}
html,body{height:100%; background:var(--bg); color:var(--ink);
  font-family:"Courier New",monospace; overflow:hidden; image-rendering:pixelated;
  touch-action:manipulation; user-select:none;}
#app{position:fixed; inset:0; display:flex; flex-direction:column;}
button{font-family:inherit; cursor:pointer; border:none; background:none; color:inherit;}
.screen{position:absolute; inset:0; display:flex; flex-direction:column;
  padding:calc(16px + var(--safe-t)) 16px calc(16px + var(--safe-b));}
canvas{display:block; image-rendering:pixelated;}

/* ── Home screen ─────────────────────────────────────────────────────────────── */
.screen.home{overflow-y:auto; gap:12px;}
.home-header{display:flex; align-items:center; justify-content:space-between; padding-bottom:4px; flex-shrink:0;}
.home-title{font-size:clamp(1.1rem,5.5vw,1.9rem); color:var(--cyan);
  text-shadow:0 0 10px var(--cyan),0 0 22px var(--cyan); letter-spacing:.12em;}
.btn-mute{font-size:1.4rem; padding:6px; min-width:44px; min-height:44px;
  display:flex; align-items:center; justify-content:center; border-radius:4px;}
.theme-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px;}
@media (min-width:640px){ .theme-grid{grid-template-columns:repeat(3,1fr);} }
@media (min-width:1000px){ .theme-grid{grid-template-columns:repeat(4,1fr);} }
.theme-card{background:var(--panel); border:2px solid var(--cyan); border-radius:4px;
  overflow:hidden; cursor:pointer; touch-action:manipulation;}
.theme-card:active{border-color:var(--magenta);}
.theme-card--soon{opacity:.45; cursor:not-allowed; border-color:#3a2055; pointer-events:none;}
.theme-card__thumb{position:relative; line-height:0;}
.theme-card__lock{position:absolute; top:4px; right:4px; width:22px;
  image-rendering:pixelated; display:block;}
.theme-card__soon-tag{position:absolute; bottom:4px; left:4px; font-size:.6rem;
  background:rgba(0,0,0,.75); color:var(--yellow); padding:2px 4px; letter-spacing:.1em;}
.theme-card__name{padding:8px 6px; text-align:center; font-size:.72rem;
  color:var(--ink); letter-spacing:.06em;}

/* ── Picker screen ────────────────────────────────────────────────────────────── */
.screen.picker{overflow-y:auto; gap:14px;}
.picker-header{display:flex; align-items:center; gap:10px; flex-shrink:0;}
.btn-back{font-size:.78rem; padding:8px 12px; min-height:44px;
  border:1px solid var(--cyan); color:var(--cyan); border-radius:4px; letter-spacing:.08em;}
.picker-theme{font-size:.7rem; color:var(--magenta); letter-spacing:.12em;}
.picker-readout{text-align:center; font-size:clamp(2.8rem,14vw,4.8rem); color:var(--cyan);
  text-shadow:0 0 16px var(--cyan); letter-spacing:.12em; line-height:1; flex-shrink:0;}
.picker-dial-wrap{display:flex; justify-content:center; flex-shrink:0;}
.picker-dial{position:relative; width:min(160px,42vw); height:min(160px,42vw);
  border:3px solid var(--cyan); border-radius:50%; box-shadow:0 0 14px var(--cyan); cursor:pointer;}
.picker-dial__track{position:absolute; inset:0; border-radius:50%;}
.picker-dial__hand{position:absolute; top:50%; left:50%;
  width:3px; height:46%; background:var(--magenta); transform-origin:0% 100%;
  margin-left:-1.5px; margin-top:-46%; border-radius:3px; box-shadow:0 0 6px var(--magenta);}
.picker-dial__center{position:absolute; top:50%; left:50%;
  width:10px; height:10px; background:var(--cyan); border-radius:50%;
  transform:translate(-50%,-50%); box-shadow:0 0 6px var(--cyan);}
.picker-stepper{display:flex; justify-content:center; gap:20px; flex-shrink:0;}
.btn-step{font-size:2rem; width:60px; height:60px; border:2px solid var(--cyan);
  color:var(--cyan); border-radius:4px; display:flex; align-items:center;
  justify-content:center; touch-action:none; line-height:1;}
.btn-step:active{background:var(--cyan); color:var(--bg);}
.preset-chips{display:flex; flex-wrap:wrap; gap:8px; justify-content:center; flex-shrink:0;}
.chip{padding:10px 12px; min-width:50px; border:1px solid var(--magenta);
  color:var(--magenta); font-size:.78rem; border-radius:4px; letter-spacing:.05em;}
.chip:active{background:var(--magenta); color:var(--bg);}
.btn-start{align-self:stretch; padding:18px; background:var(--cyan); color:var(--bg);
  font-size:1.1rem; letter-spacing:.15em; border-radius:4px; font-weight:bold;
  flex-shrink:0; margin-top:auto; min-height:58px;}
.btn-start:active{background:var(--magenta);}

/* ── Run screen ───────────────────────────────────────────────────────────────── */
.screen.run{background:var(--bg); padding:0; flex-direction:column; justify-content:stretch;}
.run-canvas-wrap{flex:1; display:flex; align-items:stretch; justify-content:stretch;
  min-height:0; overflow:hidden;}
/* Canvas fills the wrap; run.js sets inline width/height/image-rendering. */
.run-canvas-wrap canvas{width:100%; height:100%;
  image-rendering:pixelated; display:block;}
.run-controls{flex-shrink:0; display:flex; flex-direction:column; align-items:center;
  gap:6px; padding:8px 16px calc(8px + var(--safe-b)); background:rgba(10,10,26,.92);}
.run-hint{font-size:.62rem; color:var(--yellow); min-height:1.1em;
  letter-spacing:.06em; text-align:center;}
.run-buttons{display:flex; gap:10px; align-items:center;}
.btn-run{padding:12px 16px; min-width:76px; min-height:48px;
  border:2px solid var(--cyan); color:var(--cyan); font-size:.76rem;
  letter-spacing:.08em; border-radius:4px; touch-action:manipulation;}
.btn-run.btn-back-home{border-color:#444; color:#888; min-width:44px;
  font-size:1.2rem; padding:10px;}
.btn-run.btn-back-home:active{color:var(--ink);}
.btn-run.btn-pause:active{background:var(--cyan); color:var(--bg);}
.btn-run.btn-ff{border-color:var(--yellow); color:var(--yellow); min-width:64px;}
.btn-run.btn-ff:active,
.btn-run.btn-ff.ff-active{background:var(--yellow); color:var(--bg);}
.btn-run.btn-ff:disabled{border-color:#444; color:#666; background:transparent;}
.btn-run.btn-reset{border-color:var(--magenta); color:var(--magenta);}
.btn-run.btn-reset:active{background:var(--magenta); color:var(--bg);}

/* ── Done screen ──────────────────────────────────────────────────────────────── */
.screen.done{align-items:center; justify-content:center; gap:28px; text-align:center;}
.done-title{font-size:clamp(2.4rem,12vw,4rem); color:var(--done-accent,var(--cyan));
  text-shadow:0 0 18px var(--done-accent,var(--cyan)),0 0 36px var(--done-accent,var(--cyan));
  letter-spacing:.14em; line-height:1.1;
  animation:done-pulse 1.1s ease-in-out infinite alternate;}
@keyframes done-pulse{
  from{text-shadow:0 0 18px var(--cyan),0 0 36px var(--cyan);}
  to  {text-shadow:0 0 28px var(--magenta),0 0 56px var(--magenta);}
}
.done-sub{font-size:1.15rem; color:var(--yellow);}
.done-buttons{display:flex; flex-direction:column; gap:16px; width:100%; max-width:280px;}
.btn-done{padding:18px; font-size:1.05rem; letter-spacing:.12em;
  border-radius:4px; min-height:60px; width:100%;}
.btn-done.btn-again{background:var(--cyan); color:var(--bg); font-weight:bold;}
.btn-done.btn-again:active{background:var(--magenta);}
.btn-done.btn-change{border:2px solid var(--magenta); color:var(--magenta);}
.btn-done.btn-change:active{background:var(--magenta); color:var(--bg);}

/* ── Responsive: large screens — cap content width and center ─────────────────── */
@media (min-width:700px){
  .screen.home, .screen.picker, .screen.done {
    padding-left: max(16px, calc((100% - 640px) / 2));
    padding-right: max(16px, calc((100% - 640px) / 2));
  }
}

/* ── Responsive: landscape phones / short viewports ──────────────────────────── */
@media (orientation:landscape) and (max-height:500px){
  .screen.picker{ gap:6px; }
  .picker-readout{ font-size:clamp(2rem,8vw,3rem); }
  .picker-dial-wrap{ display:none; }
  .picker-stepper{ gap:12px; }
  .btn-step{ width:48px; height:48px; font-size:1.5rem; }
  .preset-chips{ gap:5px; }
  .chip{ padding:7px 10px; }
  .btn-start{ padding:12px; min-height:48px; }

  .screen.done{ gap:12px; }
  .done-title{ font-size:clamp(1.8rem,8vw,2.8rem); }
  .done-sub{ font-size:.9rem; }
  .done-buttons{ gap:10px; }
  .btn-done{ padding:12px; min-height:48px; font-size:.9rem; }
}