:root {
  --bg: #04070a;
  --panel: #0a1015;
  --green: #2bff88;
  --green-dim: #1a8a4d;
  --magenta: #ff3ba7;
  --cyan: #3bd6ff;
  --text: #b8ffcf;
  --border: #12351f;
  --mono: 'JetBrains Mono', ui-monospace, 'Courier New', monospace;
}

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

body {
  background:
    radial-gradient(ellipse at 50% -20%, rgba(43,255,136,0.10), transparent 60%),
    radial-gradient(ellipse at 100% 100%, rgba(255,59,167,0.06), transparent 50%),
    var(--bg);
  color: var(--text);
  font-family: var(--mono);
  min-height: 100vh;
  padding: 18px;
  line-height: 1.5;
}

/* CRT scanlines overlay */
.scanlines {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  background: repeating-linear-gradient(
    to bottom, rgba(0,0,0,0) 0, rgba(0,0,0,0) 2px,
    rgba(0,0,0,0.18) 3px, rgba(0,0,0,0.18) 3px);
  mix-blend-mode: multiply;
}

#app { max-width: 860px; margin: 0 auto; }

/* Header */
header { text-align: center; margin-bottom: 22px; animation: flicker 4s infinite; }
h1 {
  font-weight: 800; font-size: clamp(1.8rem, 7vw, 3rem);
  letter-spacing: 2px; color: var(--green);
  text-shadow: 0 0 8px rgba(43,255,136,0.7), 0 0 24px rgba(43,255,136,0.3);
}
h1 .ext { color: var(--magenta); text-shadow: 0 0 8px rgba(255,59,167,0.7); }
.tagline { color: var(--green-dim); font-size: 0.85rem; letter-spacing: 1px; margin-top: 4px; }
.cursor { animation: blink 1s steps(1) infinite; color: var(--green); }

@keyframes blink { 50% { opacity: 0; } }
@keyframes flicker {
  0%, 96%, 100% { opacity: 1; }
  97% { opacity: 0.85; }
  98% { opacity: 1; }
}

/* Editor */
.editor-block { margin-bottom: 14px; }
.lbl { display: block; font-size: 0.75rem; color: var(--green-dim); margin-bottom: 6px; }
.hint { color: #4a6a55; }
#formula {
  width: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--green);
  color: var(--green);
  font-family: var(--mono);
  font-size: clamp(0.95rem, 3.5vw, 1.25rem);
  font-weight: 700;
  padding: 14px;
  resize: vertical;
  outline: none;
  text-shadow: 0 0 6px rgba(43,255,136,0.5);
  border-radius: 4px;
  transition: box-shadow 0.2s, border-color 0.2s;
}
#formula:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 1px var(--green), 0 0 20px rgba(43,255,136,0.25);
}
.error {
  min-height: 18px; margin-top: 6px; font-size: 0.78rem;
  color: var(--magenta); text-shadow: 0 0 6px rgba(255,59,167,0.5);
  opacity: 0; transition: opacity 0.2s;
}
.error.show { opacity: 1; }
.error.muted-err { color: var(--cyan); text-shadow: 0 0 6px rgba(59,214,255,0.4); }

/* Scope */
.scope-wrap {
  position: relative;
  background: #010402;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px;
  margin-bottom: 16px;
  box-shadow: inset 0 0 30px rgba(43,255,136,0.06);
}
#canvas { display: block; width: 100%; }
.tcounter {
  position: absolute; top: 10px; right: 12px;
  font-size: 0.72rem; color: var(--green-dim);
  background: rgba(0,0,0,0.5); padding: 2px 6px; border-radius: 3px;
}

/* Controls */
#controls {
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
  margin-bottom: 24px;
}
.btn {
  font-family: var(--mono); font-weight: 700; font-size: 0.82rem;
  background: var(--panel); color: var(--green);
  border: 1px solid var(--green-dim); border-radius: 4px;
  padding: 10px 16px; cursor: pointer; letter-spacing: 0.5px;
  transition: all 0.15s; text-shadow: 0 0 6px rgba(43,255,136,0.3);
}
.btn:hover {
  background: #0f1c14; border-color: var(--green);
  box-shadow: 0 0 14px rgba(43,255,136,0.3);
  transform: translateY(-1px);
}
.btn:active { transform: translateY(0); }
.btn.play {
  background: linear-gradient(180deg, #0f2a1a, #071810);
  border-color: var(--green); font-size: 0.95rem; padding: 11px 22px;
}
.btn.play.active {
  background: linear-gradient(180deg, #2a0f1f, #180710);
  color: var(--magenta); border-color: var(--magenta);
  text-shadow: 0 0 6px rgba(255,59,167,0.5);
  box-shadow: 0 0 18px rgba(255,59,167,0.3);
}

.ctrl-group { display: flex; align-items: center; gap: 6px; }
.ctrl-group label { font-size: 0.7rem; color: var(--green-dim); letter-spacing: 1px; }
.ctrl-group.vol { flex: 1; min-width: 120px; }
select {
  font-family: var(--mono); font-size: 0.78rem;
  background: var(--panel); color: var(--green);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 8px 8px; cursor: pointer; outline: none;
}
select:focus { border-color: var(--green); }
input[type=range] {
  -webkit-appearance: none; appearance: none; flex: 1;
  height: 4px; background: var(--border); border-radius: 4px; outline: none;
  min-width: 80px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--green); cursor: pointer;
  box-shadow: 0 0 8px rgba(43,255,136,0.6);
}
input[type=range]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%; border: none;
  background: var(--green); cursor: pointer;
  box-shadow: 0 0 8px rgba(43,255,136,0.6);
}

/* Sections */
h2 {
  font-size: 0.8rem; color: var(--green-dim); letter-spacing: 1px;
  margin-bottom: 10px; font-weight: 400;
  display: flex; align-items: center; gap: 8px;
}
.mini-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--green-dim); border-radius: 3px; cursor: pointer;
  font-family: var(--mono); padding: 1px 6px; font-size: 0.75rem;
}
.mini-btn:hover { color: var(--green); border-color: var(--green); }

/* Presets */
.presets { margin-bottom: 26px; }
.preset-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
}
.preset {
  text-align: left; background: var(--panel);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 10px 12px; cursor: pointer; font-family: var(--mono);
  display: flex; flex-direction: column; gap: 4px;
  transition: all 0.15s;
}
.preset:hover {
  border-color: var(--green); background: #0d1912;
  box-shadow: 0 0 12px rgba(43,255,136,0.15);
}
.preset .pname { color: var(--green); font-weight: 700; font-size: 0.82rem; }
.preset code {
  color: var(--cyan); font-size: 0.7rem; opacity: 0.75;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* Community */
.community { margin-bottom: 24px; }
.community-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
}
.cbeat {
  text-align: left; background: var(--panel);
  border: 1px solid var(--border); border-left: 3px solid var(--magenta);
  border-radius: 4px; padding: 10px 12px; cursor: pointer;
  font-family: var(--mono); display: flex; flex-direction: column; gap: 3px;
  transition: all 0.15s;
}
.cbeat:hover { border-color: var(--magenta); box-shadow: 0 0 12px rgba(255,59,167,0.15); }
.cbeat .cname { color: var(--magenta); font-weight: 700; font-size: 0.8rem; }
.cbeat code { color: var(--cyan); font-size: 0.68rem; opacity: 0.7; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cbeat .cby { color: var(--green-dim); font-size: 0.66rem; }
.muted { color: #3a5a45; font-size: 0.8rem; }
#auth-status { margin-top: 10px; font-size: 0.72rem; }
.loginlink { color: var(--cyan); text-decoration: none; border-bottom: 1px dotted; }
.loginlink:hover { text-shadow: 0 0 6px rgba(59,214,255,0.5); }

/* Footer */
footer {
  border-top: 1px solid var(--border); padding-top: 14px; margin-top: 10px;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px;
  font-size: 0.72rem; color: #3a5a45;
}
footer a { color: var(--magenta); text-decoration: none; }
footer a:hover { text-shadow: 0 0 6px rgba(255,59,167,0.6); }

@media (max-width: 520px) {
  #controls { gap: 8px; }
  .btn { flex: 1 1 40%; text-align: center; }
  .btn.play { flex: 1 1 100%; }
  .ctrl-group { flex: 1 1 45%; }
}