:root {
  --green: #33ff66;
  --green-dim: #1a7a35;
  --green-dark: #0d2e18;
  --amber: #ffb000;
  --bg: #060806;
  --panel: #0c110d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  font-family: 'Share Tech Mono', monospace;
  color: var(--green);
  -webkit-font-smoothing: none;
}

/* ===== BOOT SCREEN ===== */
.boot-screen {
  position: fixed; inset: 0;
  background: #000;
  display: flex; align-items: center; justify-content: center;
}
.boot-text {
  font-family: 'VT323', monospace;
  font-size: 28px;
  color: var(--green);
  text-shadow: 0 0 8px var(--green);
  animation: bootIn .3s steps(3);
}
.boot-text > div { animation: fadeUp .4s both; }
.boot-text > div:nth-child(1) { font-size: 42px; animation-delay: 0s; }
.boot-sub { font-size: 20px; color: var(--green-dim); animation-delay: .4s !important; }
.boot-text > div:nth-child(3) { animation-delay: .7s; }
.boot-blink { animation: blink 1s steps(2) infinite !important; margin-top: 8px; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px);} to {opacity:1; transform:none;} }
@keyframes blink { 50% { opacity: 0; } }

/* ===== CRT ===== */
.crt-screen {
  position: relative;
  background:
    radial-gradient(ellipse at center, rgba(20,50,25,0.25) 0%, rgba(0,0,0,0.85) 100%),
    var(--bg);
}
.scanlines {
  pointer-events: none;
  position: fixed; inset: 0; z-index: 5;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0) 0px,
    rgba(0,0,0,0) 2px,
    rgba(0,0,0,0.25) 3px,
    rgba(0,0,0,0.25) 4px
  );
  mix-blend-mode: multiply;
}

/* ===== HEADER ===== */
.tia-title {
  font-family: 'VT323', monospace;
  font-size: clamp(28px, 7vw, 52px);
  letter-spacing: 3px;
  color: var(--green);
  text-shadow: 0 0 10px var(--green), 0 0 22px rgba(51,255,102,.5);
  margin: 0;
  animation: flicker 5s infinite;
}
@keyframes flicker {
  0%,97%,100% { opacity: 1; } 98% { opacity: .7; } 99% { opacity: .9; }
}
.tia-subtitle {
  color: var(--amber);
  font-size: 13px;
  letter-spacing: 2px;
  text-shadow: 0 0 6px rgba(255,176,0,.5);
}

/* ===== INPUTS ===== */
.prompt-label { color: var(--amber); font-size: 14px; }
.tia-input {
  background: #000;
  border: 1px solid var(--green-dim);
  color: var(--green);
  font-family: inherit;
  font-size: 15px;
  padding: 6px 10px;
  outline: none;
  text-shadow: 0 0 4px var(--green);
}
.tia-input:focus { border-color: var(--green); box-shadow: 0 0 8px rgba(51,255,102,.4); }

/* ===== BUTTONS ===== */
.transport {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  background: var(--panel);
  border: 1px solid var(--green-dark);
  padding: 8px; margin-bottom: 8px;
}
.tia-btn {
  background: linear-gradient(#1a2a1d, #0a130c);
  border: 1px solid var(--green-dim);
  border-top-color: #2a5a35;
  color: var(--green);
  font-family: inherit;
  font-size: 13px;
  padding: 7px 12px;
  cursor: pointer;
  text-shadow: 0 0 4px var(--green);
  transition: all .12s;
}
.tia-btn:hover { background: linear-gradient(#24401f, #10200f); box-shadow: 0 0 8px rgba(51,255,102,.3); }
.tia-btn:active { transform: translateY(1px); }
.tia-btn-active { background: var(--green-dim); color: #000; text-shadow: none; box-shadow: 0 0 10px var(--green); }
.tia-btn-danger { border-color: #ff4444; color: #ff5555; text-shadow: 0 0 4px #ff4444; }
.tia-btn-danger.tia-btn-active { background: #cc2222; color: #fff; box-shadow: 0 0 10px #ff4444; }

.tiny-label { font-size: 10px; color: var(--green-dim); letter-spacing: 1px; }
.step-btn {
  background: #0a130c; border: 1px solid var(--green-dim);
  color: var(--green); font-family: inherit; font-size: 12px;
  padding: 5px 9px; cursor: pointer;
}
.step-btn:hover { background: #16281a; }
.step-btn-active { background: var(--green-dim); color: #000; }
.bpm-val { font-size: 16px; min-width: 34px; text-align: center; color: var(--amber); text-shadow: 0 0 5px var(--amber); }

/* ===== DISSONANCE ===== */
.dissonance {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--panel); border: 1px solid var(--green-dark);
  padding: 6px 10px; margin-bottom: 8px; font-size: 12px;
}
.diss-bar { flex: 1; min-width: 100px; height: 12px; background: #000; border: 1px solid var(--green-dim); overflow: hidden; }
.diss-fill { height: 100%; background: linear-gradient(90deg, var(--green), var(--amber), #ff4444); transition: width .3s; }
.diss-val { color: var(--amber); font-size: 11px; }

/* ===== GRID ===== */
.grid-wrap { background: var(--panel); border: 1px solid var(--green-dark); overflow-x: auto; }
.grid-header, .grid-sub {
  display: grid;
  grid-template-columns: 40px 1fr 1fr;
  min-width: 560px;
}
.grid-header { border-bottom: 1px solid var(--green-dim); }
.gh-row { padding: 6px 4px; text-align: center; font-size: 12px; color: var(--green-dim); }
.gh-chan { padding: 6px; text-align: center; font-weight: bold; letter-spacing: 2px; }
.gh-chan.ch0 { color: var(--green); }
.gh-chan.ch1 { color: var(--amber); }
.grid-sub { font-size: 9px; color: var(--green-dim); border-bottom: 1px solid var(--green-dark); }
.gh-fields { display: grid; grid-template-columns: 1.2fr 1.4fr 1.4fr; padding: 2px 24px 2px 4px; gap: 4px; }
.gh-fields span { text-align: center; }

.grid-body { max-height: 46vh; overflow-y: auto; min-width: 560px; }
.trk-row {
  display: grid;
  grid-template-columns: 40px 1fr 1fr;
  border-bottom: 1px solid rgba(26,122,53,0.15);
  align-items: stretch;
}
.trk-row.row-beat { background: rgba(51,255,102,0.03); }
.trk-row.row-play { background: rgba(255,176,0,0.14); box-shadow: inset 0 0 0 1px var(--amber); }
.cell-idx { padding: 5px 4px; text-align: center; font-size: 11px; color: var(--green-dim); border-right: 1px solid var(--green-dark); }

.chan-group { display: grid; grid-template-columns: 1.2fr 1.4fr 1.4fr 22px; gap: 3px; padding: 3px 4px; align-items: center; }
.chan-group.ch1 { border-left: 1px solid var(--green-dark); }

.cell {
  background: #000; border: 1px solid transparent;
  color: var(--green); font-family: inherit; font-size: 12px;
  padding: 3px 4px; text-align: center; cursor: pointer;
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
.cell-note { color: var(--green); text-shadow: 0 0 4px var(--green); border-color: var(--green-dark); }
.chan-group.ch1 .cell-note { color: var(--amber); text-shadow: 0 0 4px var(--amber); }
.cell-wave { background: #050a06; border-color: var(--green-dark); font-size: 10px; }
.cell-sel { border-color: var(--amber) !important; box-shadow: 0 0 6px rgba(255,176,0,.5); }

.vol-wrap { display: flex; align-items: center; gap: 3px; border: 1px solid transparent; padding: 1px; }
.vol-slider { flex: 1; accent-color: var(--green); height: 4px; min-width: 24px; }
.chan-group.ch1 .vol-slider { accent-color: var(--amber); }
.vol-num { font-size: 10px; width: 16px; color: var(--green-dim); }

.cell-clear {
  background: transparent; border: none; color: var(--green-dark);
  cursor: pointer; font-size: 10px; padding: 2px;
}
.cell-clear:hover { color: #ff4444; }

/* ===== HELPER PANEL ===== */
.helper-panel {
  background: var(--panel); border: 1px solid var(--green-dark);
  padding: 8px; margin-top: 8px; font-size: 12px;
}
.note-buttons { display: flex; flex-wrap: wrap; gap: 5px; margin: 8px 0; }
.note-key {
  background: linear-gradient(#eaeaea, #bbb);
  border: 1px solid #000; color: #111;
  font-family: inherit; font-size: 12px; font-weight: bold;
  padding: 8px 10px; min-width: 42px; cursor: pointer;
  border-radius: 0 0 3px 3px;
}
.note-key:hover { background: linear-gradient(#fff, #ccc); }
.note-key:active { transform: translateY(2px); }
.hint { color: var(--green-dim); font-size: 10px; line-height: 1.5; }

/* ===== FOOTER ===== */
.footer-bar {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
  margin-top: 12px; padding: 8px 10px;
  border-top: 1px solid var(--green-dark);
  font-size: 11px; color: var(--green-dim);
}
.remix-link { color: var(--amber); text-decoration: none; text-shadow: 0 0 5px rgba(255,176,0,.4); }
.remix-link:hover { text-decoration: underline; }

/* ===== MODAL ===== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(0,0,0,.8);
  display: flex; align-items: center; justify-content: center;
  padding: 12px;
}
.modal {
  background: var(--panel); border: 2px solid var(--green-dim);
  box-shadow: 0 0 30px rgba(51,255,102,.3);
  width: 100%; max-width: 700px; max-height: 90vh; display: flex; flex-direction: column;
}
.modal-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 12px; border-bottom: 1px solid var(--green-dim);
  font-size: 16px; color: var(--amber); text-shadow: 0 0 6px var(--amber);
}
.modal-close { background: none; border: none; color: var(--green); cursor: pointer; font-size: 16px; }
.modal-info { padding: 6px 12px; font-size: 11px; color: var(--green-dim); }
.export-tabs { display: flex; gap: 4px; padding: 0 12px; }
.etab {
  background: #0a130c; border: 1px solid var(--green-dark);
  color: var(--green-dim); font-family: inherit; font-size: 12px;
  padding: 6px 12px; cursor: pointer; border-bottom: none;
}
.etab-active { background: var(--green-dark); color: var(--green); }
.export-code {
  flex: 1; overflow: auto; margin: 0 12px;
  background: #000; border: 1px solid var(--green-dark);
  color: var(--green); font-size: 11px; line-height: 1.4;
  padding: 10px; white-space: pre; text-shadow: 0 0 3px var(--green);
}
.modal-actions { display: flex; gap: 8px; padding: 12px; }
.modal-actions .tia-btn { flex: 1; }

/* mobile */
@media (max-width: 640px) {
  .transport { gap: 4px; }
  .tia-btn { padding: 6px 8px; font-size: 11px; }
  .grid-body { max-height: 40vh; }
}
</parameter>