/* ───────────────────────────────────────────────────────────
   Reaction Diffusion Studio
   ─────────────────────────────────────────────────────────── */

:root{
  --bg:        #06070a;
  --ink:       #e9edf2;
  --ink-dim:   #8b93a1;
  --ink-faint: #5b626e;
  --accent:    #6ee7d0;
  --accent-2:  #8fb4ff;
  --rec:       #ff5c6c;

  --glass:     rgba(15,17,22,.72);
  --glass-2:   rgba(255,255,255,.045);
  --line:      rgba(255,255,255,.09);
  --line-soft: rgba(255,255,255,.055);

  --r:  14px;
  --r-s: 9px;

  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;

  --pad: 14px;
}

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

/* The `hidden` attribute only sets display:none in the UA stylesheet, so any
   author rule with a `display` (.fatal, .modal, .recdot) silently defeats it.
   Keep this ahead of every component rule. */
[hidden]{ display:none !important; }

html,body{ height:100%; }

body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:13px;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

#app{ position:fixed; inset:0; }

canvas#gl{
  position:absolute; inset:0;
  width:100%; height:100%;
  display:block;
  touch-action:none;
  cursor:crosshair;
  background:#000;
}

/* frosted chrome shared by every floating surface */
.chrome{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r);
  backdrop-filter:blur(22px) saturate(150%);
  -webkit-backdrop-filter:blur(22px) saturate(150%);
  box-shadow:
    0 1px 0 rgba(255,255,255,.06) inset,
    0 18px 50px -22px rgba(0,0,0,.9);
}

/* fade the whole UI out with H / fullscreen-ish mode */
#app.ui-hidden .topbar,
#app.ui-hidden .panel,
#app.ui-hidden .dock{
  opacity:0; pointer-events:none; transform:translateY(-6px);
}
#app.ui-hidden .panel-right{ transform:translateX(14px); }
#app.ui-hidden .dock{ transform:translate(-50%, 14px); }

/* ── top bar ─────────────────────────────────────────────── */
.topbar{
  position:absolute; top:14px; left:14px; right:14px;
  height:46px; z-index:6;
  display:flex; align-items:center; gap:16px;
  padding:0 8px 0 14px;
  transition:opacity .3s, transform .3s;
}

.brand{ display:flex; align-items:center; gap:10px; min-width:0; }
.brand .mark{
  width:15px; height:15px; border-radius:50%;
  border:2px solid var(--accent);
  position:relative; flex:none;
  box-shadow:0 0 14px rgba(110,231,208,.5);
}
.brand .mark::after{
  content:""; position:absolute; inset:3.2px;
  border-radius:50%; background:var(--accent);
}
.wordmark{
  font-size:12px; font-weight:600; letter-spacing:.14em;
  text-transform:uppercase; white-space:nowrap;
}
.wordmark em{ font-style:normal; color:var(--accent); font-weight:500; }

.stats{ display:flex; gap:6px; margin-left:auto; }
.stat{
  display:flex; align-items:baseline; gap:5px;
  font-family:var(--mono); font-size:11px;
  background:var(--glass-2); border:1px solid var(--line-soft);
  border-radius:7px; padding:4px 9px;
}
.stat b{ font-weight:600; color:var(--ink); font-variant-numeric:tabular-nums; }
.stat i{ font-style:normal; color:var(--ink-faint); font-size:10px; letter-spacing:.06em; }

.topActions{ display:flex; align-items:center; gap:6px; }

.recdot{
  display:flex; align-items:center; gap:7px;
  font-family:var(--mono); font-size:11px;
  padding:4px 10px; border-radius:7px;
  background:rgba(255,92,108,.13);
  border:1px solid rgba(255,92,108,.4);
  color:#ffc4ca;
}
.recdot i{
  width:7px; height:7px; border-radius:50%; background:var(--rec);
  animation:pulse 1.15s ease-in-out infinite;
}
.recdot u{ text-decoration:none; color:rgba(255,196,202,.6); }
@keyframes pulse{ 50%{ opacity:.25; } }

/* ── buttons ─────────────────────────────────────────────── */
.ico{
  width:30px; height:30px; flex:none;
  display:grid; place-items:center;
  background:var(--glass-2);
  border:1px solid var(--line-soft);
  border-radius:8px;
  color:var(--ink-dim);
  font-size:12px; line-height:1;
  cursor:pointer;
  transition:.16s;
}
.ico:hover{ color:var(--ink); border-color:rgba(255,255,255,.2); background:rgba(255,255,255,.09); }
.ico:active{ transform:scale(.94); }
.ico.big{ width:38px; height:38px; font-size:13px; color:var(--ink); }
.ico.on{ color:#04120f; background:var(--accent); border-color:var(--accent); }

.btn{
  flex:1; min-width:0;
  padding:8px 12px;
  background:var(--glass-2);
  border:1px solid var(--line-soft);
  border-radius:var(--r-s);
  color:var(--ink);
  font-family:var(--sans); font-size:11.5px; font-weight:500;
  letter-spacing:.02em;
  cursor:pointer; transition:.16s;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.btn:hover{ background:rgba(255,255,255,.1); border-color:rgba(255,255,255,.2); }
.btn:active{ transform:translateY(1px); }

.btn-rec{
  display:flex; align-items:center; justify-content:center; gap:8px;
  border-color:rgba(255,92,108,.35); color:#ffb9c1;
}
.btn-rec:hover{ background:rgba(255,92,108,.14); border-color:rgba(255,92,108,.6); }
.btn-rec .sq{ width:9px; height:9px; border-radius:50%; background:var(--rec); flex:none; }
.btn-rec.recording{ background:rgba(255,92,108,.18); border-color:var(--rec); color:#fff; }
.btn-rec.recording .sq{ border-radius:2px; animation:pulse 1.15s ease-in-out infinite; }

.btn-present{
  border-color:rgba(110,231,208,.32); color:var(--accent);
}
.btn-present:hover{ background:rgba(110,231,208,.13); border-color:rgba(110,231,208,.6); }

.rowBtns{ display:flex; gap:7px; margin-top:9px; }

/* ── panels ──────────────────────────────────────────────── */
.panel{
  position:absolute; top:72px; bottom:76px;
  width:300px; z-index:5;
  overflow-y:auto; overscroll-behavior:contain;
  padding:4px;
  transition:opacity .3s, transform .3s;
}
.panel-right{ right:14px; }

.panel::-webkit-scrollbar{ width:9px; }
.panel::-webkit-scrollbar-thumb{
  background:rgba(255,255,255,.13); border-radius:9px;
  border:3px solid transparent; background-clip:content-box;
}
.panel::-webkit-scrollbar-thumb:hover{ background:rgba(255,255,255,.26); background-clip:content-box; }
.panel::-webkit-scrollbar-track{ background:transparent; }

.sec{ padding:var(--pad); border-bottom:1px solid var(--line-soft); }
.sec:last-child{ border-bottom:0; }

.sec h2{
  font-size:10px; font-weight:600; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-faint); margin-bottom:12px;
  display:flex; align-items:baseline; gap:8px;
}
.sec h3{
  font-size:10px; font-weight:600; letter-spacing:.12em; text-transform:uppercase;
  color:var(--ink-faint); margin:14px 0 8px;
}
.hint{ font-weight:400; letter-spacing:.02em; text-transform:none; color:rgba(255,255,255,.2); font-size:10px; margin-left:auto; }

.note{
  margin-top:10px; font-size:10.5px; line-height:1.55;
  color:var(--ink-faint);
}
.note i{ font-family:var(--mono); font-style:normal; color:var(--ink-dim); }

/* ── preset chooser ──────────────────────────────────────── */
.sel{
  -webkit-appearance:none; appearance:none;
  display:block; width:100%;
  padding:9px 30px 9px 11px;
  background:rgba(0,0,0,.35);
  border:1px solid var(--line-soft); border-radius:var(--r-s);
  color:var(--ink);
  font-family:var(--sans); font-size:12px; font-weight:500;
  cursor:pointer; transition:.16s;
  /* chevron, inlined so the page stays self-contained */
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238b93a1' stroke-width='1.4' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 11px center;
  background-size:10px 6px;
}
.sel:hover{ border-color:rgba(255,255,255,.22); }
.sel:focus{ outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(110,231,208,.14); }
.sel option{ background:#14161c; color:var(--ink); }
.sel optgroup{ background:#14161c; color:var(--ink-faint); font-style:normal; }

.chips{ display:flex; flex-wrap:wrap; gap:6px; }
.chip{
  display:flex; align-items:center; gap:6px;
  padding:5px 6px 5px 9px; border-radius:20px;
  background:var(--glass-2); border:1px solid var(--line-soft);
  font-size:10.5px; color:var(--ink-dim); cursor:pointer; transition:.15s;
}
.chip:hover{ color:var(--ink); border-color:rgba(255,255,255,.22); }
.chip b{ font-weight:500; }
.chip span{
  width:15px; height:15px; border-radius:50%; display:grid; place-items:center;
  font-size:11px; line-height:1; color:var(--ink-faint);
}
.chip span:hover{ background:rgba(255,92,108,.2); color:var(--rec); }

/* ── parameter-space pad ─────────────────────────────────── */
.pad{
  width:100%; height:186px; display:block;
  border-radius:var(--r-s);
  border:1px solid var(--line-soft);
  cursor:crosshair; touch-action:none;
}
.padRead{
  display:flex; gap:14px; margin-top:8px;
  font-family:var(--mono); font-size:10.5px; color:var(--ink-faint);
}
.padRead b{ color:var(--accent); font-weight:500; font-variant-numeric:tabular-nums; }

/* ── sliders ─────────────────────────────────────────────── */
.ctrls{ display:flex; flex-direction:column; gap:11px; }

.ctrl label{
  display:flex; justify-content:space-between; align-items:baseline;
  font-size:11px; color:var(--ink-dim); margin-bottom:6px;
}
.ctrl label b{
  font-family:var(--mono); font-size:10.5px; font-weight:500;
  color:var(--ink); font-variant-numeric:tabular-nums;
}

input[type=range]{
  -webkit-appearance:none; appearance:none;
  width:100%; height:16px; background:transparent; cursor:grab; display:block;
}
input[type=range]:active{ cursor:grabbing; }

input[type=range]::-webkit-slider-runnable-track{
  height:3px; border-radius:3px;
  background:linear-gradient(to right,
    var(--accent) 0 calc(var(--p,0) * 100%),
    rgba(255,255,255,.12) calc(var(--p,0) * 100%) 100%);
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; appearance:none;
  width:13px; height:13px; margin-top:-5px;
  border-radius:50%; background:#f2f6fa;
  border:0; box-shadow:0 1px 5px rgba(0,0,0,.6);
  transition:transform .13s;
}
input[type=range]:hover::-webkit-slider-thumb{ transform:scale(1.18); }

input[type=range]::-moz-range-track{ height:3px; border-radius:3px; background:rgba(255,255,255,.12); }
input[type=range]::-moz-range-progress{ height:3px; border-radius:3px; background:var(--accent); }
input[type=range]::-moz-range-thumb{
  width:13px; height:13px; border:0; border-radius:50%;
  background:#f2f6fa; box-shadow:0 1px 5px rgba(0,0,0,.6);
}

/* ── segmented controls ──────────────────────────────────── */
.segRow{ margin-top:13px; }
.segRow label{
  display:block; font-size:11px; color:var(--ink-dim); margin-bottom:6px;
}
.seg{
  display:flex; gap:2px; padding:2px;
  background:rgba(0,0,0,.35);
  border:1px solid var(--line-soft); border-radius:8px;
}
.seg button{
  flex:1 1 0; min-width:0;
  padding:5px 4px; border:0; border-radius:6px;
  background:transparent; color:var(--ink-faint);
  font-family:var(--sans); font-size:10.5px; letter-spacing:.01em;
  cursor:pointer; transition:.15s;
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.seg button:hover{ color:var(--ink); }
.seg button.on{ background:rgba(110,231,208,.16); color:var(--accent); box-shadow:0 0 0 1px rgba(110,231,208,.22) inset; }

/* ── palette row ─────────────────────────────────────────── */
.palettes{
  display:grid; grid-template-columns:repeat(4,1fr); gap:6px; margin-bottom:14px;
}
.pal{
  height:26px; border-radius:6px; cursor:pointer;
  border:1px solid var(--line-soft);
  position:relative; transition:.15s;
}
.pal:hover{ transform:translateY(-1px); border-color:rgba(255,255,255,.28); }
.pal.on{ box-shadow:0 0 0 2px var(--bg), 0 0 0 3px var(--accent); }

/* ── toggles ─────────────────────────────────────────────── */
.toggles{ display:flex; flex-wrap:wrap; gap:6px; margin-top:13px; }
.tgl{
  display:flex; align-items:center; gap:7px;
  padding:6px 10px 6px 8px; border-radius:20px;
  background:var(--glass-2); border:1px solid var(--line-soft);
  font-size:10.5px; color:var(--ink-dim); cursor:pointer;
  user-select:none; transition:.15s;
}
.tgl i{
  width:22px; height:12px; border-radius:12px; flex:none;
  background:rgba(255,255,255,.14); position:relative; transition:.18s;
}
.tgl i::after{
  content:""; position:absolute; top:2px; left:2px;
  width:8px; height:8px; border-radius:50%;
  background:#fff; transition:.18s;
}
.tgl.on{ color:var(--accent); border-color:rgba(110,231,208,.35); }
.tgl.on i{ background:var(--accent); }
.tgl.on i::after{ left:12px; background:#04120f; }

/* ── dock ────────────────────────────────────────────────── */
.dock{
  position:absolute; left:50%; bottom:16px; transform:translateX(-50%);
  z-index:6; display:flex; align-items:center; gap:7px;
  padding:7px 9px;
  transition:opacity .3s, transform .3s;
}
.dock .sep{ width:1px; height:20px; background:var(--line); margin:0 2px; }
.brushHint{
  font-size:10.5px; color:var(--ink-faint); padding:0 8px 0 6px;
  letter-spacing:.02em; white-space:nowrap;
}

/* ── modal / toast / fatal ───────────────────────────────── */
.modal{
  position:absolute; inset:0; z-index:20;
  display:grid; place-items:center;
  background:rgba(4,5,8,.6);
  backdrop-filter:blur(3px);
}
.modalBox{ width:min(360px, 88vw); padding:22px; }
.modalBox h2{
  font-size:10px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--ink-faint); margin-bottom:16px;
}
.modalBox dl{
  display:grid; grid-template-columns:auto 1fr; gap:9px 16px;
  font-size:12px; margin-bottom:20px;
}
.modalBox dl + h2{ margin-top:4px; }
.modalBox dt{
  font-family:var(--mono); font-size:10.5px; color:var(--accent);
  text-align:right; white-space:nowrap;
}
.modalBox dd{ color:var(--ink-dim); }
.modalBox.wide{ width:min(560px, 92vw); }

.fieldLabel{
  display:flex; align-items:baseline; gap:8px;
  font-size:11px; color:var(--ink-dim); margin:0 0 6px;
}
.fieldLabel span{ font-size:10px; color:var(--ink-faint); margin-left:auto; }
.fieldLabel + *{ margin-bottom:14px; }

.txt, .code{
  display:block; width:100%;
  padding:9px 11px;
  background:rgba(0,0,0,.4);
  border:1px solid var(--line-soft); border-radius:var(--r-s);
  color:var(--ink);
  font-family:var(--mono); font-size:11.5px; line-height:1.6;
  resize:vertical;
}
.txt{ font-family:var(--sans); font-size:12px; }
.txt:focus, .code:focus{
  outline:none; border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(110,231,208,.14);
}
/* pre-wrap, not pre: the entry is pre-wrapped at ~62 chars, and soft wrapping
   catches the rest on a narrow screen so no code is ever scrolled out of sight.
   Soft wraps are not real newlines, so a copy still yields valid source. */
.code{
  min-height:130px;
  white-space:pre-wrap; overflow-wrap:anywhere; overflow-x:hidden;
  color:var(--accent);
}
.code::selection{ background:rgba(110,231,208,.28); }

/* ── present-mode hint ───────────────────────────────────── */
.presentHint{
  position:absolute; left:50%; bottom:40px; transform:translateX(-50%);
  z-index:12;
  display:flex; align-items:center; flex-wrap:wrap;
  justify-content:center; gap:8px 22px;
  padding:13px 22px;
  max-width:calc(100vw - 28px);
  font-size:12px; color:var(--ink-dim);
  pointer-events:none;
  opacity:1; transition:opacity .9s ease;
}
.presentHint.fading{ opacity:0; }
.presentHint span{ white-space:nowrap; }
.presentHint b{
  font-family:var(--mono); font-size:11px; font-weight:600;
  color:var(--accent); margin-right:7px;
}

@media (max-width:560px){
  .presentHint{ font-size:11px; gap:6px 14px; padding:10px 14px; bottom:24px; }
}

.toast{
  position:absolute; left:50%; bottom:74px; transform:translateX(-50%);
  z-index:30; padding:9px 16px; border-radius:20px;
  background:rgba(20,22,28,.94);
  border:1px solid var(--line);
  font-size:11.5px; color:var(--ink);
  box-shadow:0 12px 34px -14px rgba(0,0,0,.9);
  animation:toastIn .28s cubic-bezier(.2,.9,.3,1.3);
  pointer-events:none; white-space:nowrap;
}
@keyframes toastIn{ from{ opacity:0; transform:translate(-50%,10px); } }

.fatal{
  position:absolute; inset:0; z-index:40;
  display:grid; place-items:center; text-align:center;
  padding:40px; background:var(--bg);
  font-size:14px; line-height:1.7; color:var(--ink-dim);
}
.fatal b{ display:block; color:var(--ink); font-size:16px; margin-bottom:10px; }

/* ── responsive ──────────────────────────────────────────── */
@media (max-width:1100px){
  .panel{ width:272px; }
}

@media (max-width:860px){
  .topbar{ height:42px; padding:0 6px 0 12px; gap:10px; }
  .wordmark{ font-size:10px; }
  .stats .stat:nth-child(3){ display:none; }

  .panel{
    top:auto; bottom:70px; left:10px; right:10px; width:auto;
    max-height:52vh;
  }

  .dock{ bottom:10px; }
  .brushHint{ display:none; }
}

@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
}