/* =========================================================
   MORSE CODE DEVICE
   ========================================================= */

/* =========================================================
   SELF-HOSTED FONTS
   ---------------------------------------------------------
   Files live in /fonts (woff2 only). font-display:swap shows a
   system fallback until each weight loads. Family names match
   the --f-mono / --f-sans / --f-serif variables below.
   ========================================================= */
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 400;
  font-display: swap; src: url("fonts/jetbrains-mono-400.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 500;
  font-display: swap; src: url("fonts/jetbrains-mono-500.woff2") format("woff2");
}
@font-face {
  font-family: "JetBrains Mono"; font-style: normal; font-weight: 700;
  font-display: swap; src: url("fonts/jetbrains-mono-700.woff2") format("woff2");
}
@font-face {
  font-family: "Space Grotesk"; font-style: normal; font-weight: 400;
  font-display: swap; src: url("fonts/space-grotesk-400.woff2") format("woff2");
}
@font-face {
  font-family: "Space Grotesk"; font-style: normal; font-weight: 500;
  font-display: swap; src: url("fonts/space-grotesk-500.woff2") format("woff2");
}
@font-face {
  font-family: "Space Grotesk"; font-style: normal; font-weight: 700;
  font-display: swap; src: url("fonts/space-grotesk-700.woff2") format("woff2");
}
@font-face {
  font-family: "DM Serif Display"; font-style: normal; font-weight: 400;
  font-display: swap; src: url("fonts/dm-serif-display-400.woff2") format("woff2");
}

/* =========================================================
   THEMES
   ---------------------------------------------------------
   :root holds the DARK palette. body[data-theme="light"]
   overrides for light mode. Finishes only add textures and
   *very small* tonal nudges; they do not redefine the palette
   except for explicitly-themed surfaces (wood, pcb) which
   have separate light/dark variants below.
   ========================================================= */
:root {
  /* glow */
  --glow: #ffbe5c;

  /* success / positive feedback (drill correct, copied, fresh-chip) */
  --final: #7cf2a0;

  /* surfaces (DARK) */
  --bg-0: #0a0c10;
  --bg-1: #0f1218;
  --panel: #14171d;
  --panel-2: #1c2230;
  --panel-edge: #2a3142;
  --inkline: #3a455c;
  --led-off: #1c2330;
  --led-off-edge: #2c3650;

  /* ink */
  --ink: #e7ecf3;
  --ink-dim: #98a3b5;
  --ink-faint: #5b6677;

  /* on-led ink (text inside lit LEDs, always dark for contrast) */
  --on-led-ink: #14110a;

  /* fonts */
  --f-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --f-sans: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --f-serif: "DM Serif Display", ui-serif, Georgia, serif;
  --f-ui: var(--f-mono);
  --f-display: var(--f-mono);

  --radius: 22px;
  --shadow-deep: 0 30px 80px -20px rgba(0,0,0,.55), 0 6px 20px -10px rgba(0,0,0,.6);
}

/* LIGHT palette */
body[data-theme="light"] {
  --bg-0: #ebe6da;
  --bg-1: #ddd6c5;
  --panel: #f4efe5;
  --panel-2: #ebe5d8;
  --panel-edge: #c8c0ad;
  --inkline: #a89e87;
  --led-off: #d8cfb8;
  --led-off-edge: #b2a78d;
  --ink: #1a1916;
  --ink-dim: #5a564c;
  --ink-faint: #8a8475;
  --final: #1e8e3e;
  --on-led-ink: #ffffff;
}

body[data-font="mono"]    { --f-ui: var(--f-mono);  --f-display: var(--f-mono); }
body[data-font="grotesk"] { --f-ui: var(--f-sans);  --f-display: var(--f-sans); }
body[data-font="serif"]   { --f-ui: var(--f-sans);  --f-display: var(--f-serif); }

body[data-glow="amber"]   { --glow: #ffbe5c; }
body[data-glow="green"]   { --glow: #7cf2a0; }
body[data-glow="cyan"]    { --glow: #7adfff; }
body[data-glow="magenta"] { --glow: #ff85d8; }
body[data-glow="red"]     { --glow: #ff8c7e; }

/* Light-mode glow variants — darker for contrast on light surfaces */
body[data-theme="light"][data-glow="amber"]   { --glow: #c46a00; }
body[data-theme="light"][data-glow="green"]   { --glow: #1e8e3e; }
body[data-theme="light"][data-glow="cyan"]    { --glow: #0a6e9c; }
body[data-theme="light"][data-glow="magenta"] { --glow: #b22a87; }
body[data-theme="light"][data-glow="red"]     { --glow: #c8362a; }

/* ---------- base ---------- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--f-ui);
  color: var(--ink);
  background:
    radial-gradient(1100px 600px at 20% -10%, rgba(255,190,92,.06), transparent 60%),
    radial-gradient(900px 500px at 110% 110%, rgba(124,242,160,.05), transparent 65%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1));
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body[data-theme="light"] {
  background:
    radial-gradient(900px 500px at 20% -10%, rgba(255,170,60,.18), transparent 60%),
    radial-gradient(900px 500px at 110% 110%, rgba(100,200,140,.12), transparent 65%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1));
}

button { font: inherit; color: inherit; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }
kbd {
  font: 500 .78em/1 var(--f-mono);
  background: var(--panel-2); color: var(--ink-dim);
  border: 1px solid var(--panel-edge);
  border-bottom-width: 2px;
  padding: 2px 6px; border-radius: 6px;
}

/* ---------- device-mounted action panel ---------- */
.device-actions {
  position: absolute;
  top: 14px;
  display: flex; gap: 6px;
  z-index: 3;
}
.device-actions.left  { left: 28px; }
.device-actions.right { right: 28px; }
.device-actions .iconbtn-square {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  color: var(--ink-dim);
}
.device-actions .iconbtn-square:hover {
  color: var(--glow);
  border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge));
  background: var(--panel);
}
.device-actions .iconbtn-square svg { width: 14px; height: 14px; }

/* tree model selector — two-line buttons */
.tree-model-seg {
  grid-template-columns: repeat(2, 1fr) !important;
  gap: 6px;
}
.tree-model-seg .seg-btn {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 10px 6px;
  text-align: center;
}
.tree-model-seg .tm-name {
  font: 700 11px/1 var(--f-mono); letter-spacing: .12em;
  color: inherit;
}
.tree-model-seg .tm-sub {
  font: 500 9px/1 var(--f-mono); letter-spacing: .04em;
  color: var(--ink-faint);
  text-transform: none;
}
.tree-model-seg .seg-btn.active .tm-sub { color: var(--ink-dim); }

/* small LED variants (Model 2 deeper levels) */
#tree-svg .led-num .led-glyph { font-size: 14px; }
#tree-svg .led-punct .led-glyph { font-size: 10px; letter-spacing: -.05em; }
.iconbtn-square,
.iconbtn {
  padding: 0; width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--panel-edge);
  background: var(--panel-2);
  color: var(--ink-dim);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
}
.iconbtn { border-radius: 50%; font-size: 14px; }
.iconbtn-square svg, .iconbtn svg { width: 16px; height: 16px; }
.iconbtn-square:hover,
.iconbtn:hover {
  color: var(--glow);
  border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge));
  background: var(--panel);
}

/* hidden attribute must win over display: */
[hidden] { display: none !important; }

/* ---------- share banner ---------- */
.share-banner {
  position: sticky; top: 8px; z-index: 30;
  max-width: 540px; margin: 0 auto 8px;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(255,190,92,.14), rgba(255,190,92,.05));
  border: 1px solid color-mix(in oklab, var(--glow) 50%, transparent);
  border-radius: 14px;
  backdrop-filter: blur(8px);
}
.sb-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--glow) 30%, transparent), 0 0 14px var(--glow);
  animation: pulse 1.4s ease-in-out infinite;
}
.sb-text { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.sb-text strong { font: 700 11px/1 var(--f-mono); letter-spacing: .16em; color: var(--glow); }
.sb-text span { font-size: 13px; color: var(--ink-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sb-play {
  background: var(--glow); color: #1a1305; border: 0;
  padding: 8px 16px; border-radius: 999px;
  font: 700 11px/1 var(--f-mono); letter-spacing: .16em;
}
.sb-close {
  background: transparent; border: 0; color: var(--ink-dim);
  width: 28px; height: 28px; border-radius: 50%; font-size: 18px;
}
.sb-close:hover { color: var(--ink); background: rgba(255,255,255,.06); }

/* =========================================================
   DEVICE
   ========================================================= */
.stage {
  display: flex; justify-content: center;
  padding: 30px 16px 60px;
}
.device {
  width: min(100%, 540px);
  position: relative;
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: var(--radius);
  padding: 22px 22px 20px;
  box-shadow: var(--shadow-deep),
              inset 0 1px 0 rgba(255,255,255,.04),
              inset 0 -1px 0 rgba(0,0,0,.4);
  color: var(--ink);
}

/* =========================================================
   FINISHES — texture overlays + a few themed palettes
   Matte / Plastic / Brushed are texture-only and respect the
   active theme. Wood and PCB carry their own palettes that
   have explicit dark/light variants below.
   ========================================================= */

/* ---------- MATTE ---------- */
body[data-theme="dark"][data-finish="matte"] {
  --panel: #0d0f13;
  --panel-2: #15181f;
  --panel-edge: #1f242d;
}
body[data-theme="dark"][data-finish="matte"] .device {
  background:
    radial-gradient(140% 100% at 50% -20%, rgba(255,255,255,.02), transparent 65%),
    var(--panel);
}
body[data-theme="light"][data-finish="matte"] {
  --panel: #ede7d8;
  --panel-2: #e3dcc9;
  --panel-edge: #c1b89e;
}
body[data-theme="light"][data-finish="matte"] .device {
  background:
    radial-gradient(140% 100% at 50% -20%, rgba(0,0,0,.025), transparent 70%),
    var(--panel);
}

/* ---------- PLASTIC ---------- */
body[data-theme="dark"][data-finish="plastic"] {
  --panel: #2a3040;
  --panel-2: #232838;
  --panel-edge: #424a60;
}
body[data-theme="dark"][data-finish="plastic"] .device {
  background:
    linear-gradient(180deg,
      color-mix(in oklab, var(--panel) 60%, white 18%) 0%,
      color-mix(in oklab, var(--panel) 80%, white 8%) 18%,
      var(--panel) 45%,
      color-mix(in oklab, var(--panel) 80%, black 10%) 85%,
      color-mix(in oklab, var(--panel) 60%, black 22%) 100%);
  box-shadow: var(--shadow-deep),
    inset 0 2px 0 rgba(255,255,255,.18),
    inset 0 -2px 0 rgba(0,0,0,.55);
}
body[data-theme="light"][data-finish="plastic"] {
  --panel: #ece6d0;
  --panel-2: #e4ddc4;
  --panel-edge: #bdb290;
}
body[data-theme="light"][data-finish="plastic"] .device {
  background:
    linear-gradient(180deg,
      color-mix(in oklab, var(--panel) 50%, white 30%) 0%,
      color-mix(in oklab, var(--panel) 80%, white 12%) 22%,
      var(--panel) 45%,
      color-mix(in oklab, var(--panel) 80%, black 8%) 90%,
      color-mix(in oklab, var(--panel) 70%, black 15%) 100%);
  box-shadow: var(--shadow-deep),
    inset 0 2px 0 rgba(255,255,255,.6),
    inset 0 -2px 0 rgba(0,0,0,.25);
}
body[data-finish="plastic"] .device::after {
  content: ""; position: absolute;
  inset: 1px 1px auto 1px; height: 40%;
  border-radius: var(--radius) var(--radius) 50% 50% / var(--radius) var(--radius) 30% 30%;
  background: linear-gradient(180deg, rgba(255,255,255,.06), transparent 80%);
  pointer-events: none;
}
body[data-theme="light"][data-finish="plastic"] .device::after {
  background: linear-gradient(180deg, rgba(255,255,255,.55), transparent 80%);
}

/* ---------- BRUSHED ---------- */
body[data-theme="dark"][data-finish="brushed"] {
  --panel: #2c2e32;
  --panel-2: #25272b;
  --panel-edge: #3d4046;
}
body[data-theme="dark"][data-finish="brushed"] .device {
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,.025) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, color-mix(in oklab, var(--panel) 90%, white 6%), var(--panel));
}
body[data-theme="light"][data-finish="brushed"] {
  --panel: #d8d3c4;
  --panel-2: #cdc8b8;
  --panel-edge: #ada690;
}
body[data-theme="light"][data-finish="brushed"] .device {
  background:
    repeating-linear-gradient(90deg, rgba(0,0,0,.03) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, color-mix(in oklab, var(--panel) 90%, white 14%), var(--panel));
}

/* ---------- WOOD (themed, theme-aware) ---------- */
body[data-theme="dark"][data-finish="wood"] {
  --panel: #5b3a1e;
  --panel-2: #4a2f18;
  --panel-edge: #2a1808;
  --led-off: #2a1808;
  --led-off-edge: #4a2f18;
  --ink: #f4e4c8;
  --ink-dim: #c5a878;
  --ink-faint: #8a6e4a;
  --inkline: #6b4422;
}
body[data-theme="dark"][data-finish="wood"] .device {
  background:
    repeating-linear-gradient(92deg, transparent 0 7px, rgba(0,0,0,.06) 7px 8px, transparent 8px 22px, rgba(255,200,140,.04) 22px 24px),
    repeating-linear-gradient(88deg, transparent 0 31px, rgba(0,0,0,.08) 31px 32px, transparent 32px 80px),
    radial-gradient(40px 18px at 28% 22%, rgba(0,0,0,.18), transparent 70%),
    radial-gradient(50px 20px at 78% 68%, rgba(0,0,0,.14), transparent 75%),
    linear-gradient(180deg, #6b4424 0%, #5b3a1e 40%, #4a2f18 100%);
  box-shadow: var(--shadow-deep),
    inset 0 2px 0 rgba(255,210,160,.12),
    inset 0 -2px 0 rgba(0,0,0,.55);
}
body[data-theme="dark"][data-finish="wood"] .tree-panel {
  background: linear-gradient(180deg, #1a0e05, #110800);
  border-color: #2a1808;
}

body[data-theme="light"][data-finish="wood"] {
  --panel: #d4a574;
  --panel-2: #c4965f;
  --panel-edge: #8b6038;
  --led-off: #b88858;
  --led-off-edge: #8b6038;
  --ink: #2b1908;
  --ink-dim: #5a3a1e;
  --ink-faint: #7a5530;
  --inkline: #8b6038;
}
body[data-theme="light"][data-finish="wood"] .device {
  background:
    repeating-linear-gradient(92deg, transparent 0 7px, rgba(0,0,0,.06) 7px 8px, transparent 8px 22px, rgba(255,255,255,.05) 22px 24px),
    repeating-linear-gradient(88deg, transparent 0 31px, rgba(0,0,0,.07) 31px 32px, transparent 32px 80px),
    radial-gradient(40px 18px at 28% 22%, rgba(0,0,0,.15), transparent 70%),
    radial-gradient(50px 20px at 78% 68%, rgba(0,0,0,.12), transparent 75%),
    linear-gradient(180deg, #e0b582 0%, #d4a574 40%, #c4965f 100%);
  box-shadow: var(--shadow-deep),
    inset 0 2px 0 rgba(255,235,200,.5),
    inset 0 -2px 0 rgba(0,0,0,.2);
}
body[data-theme="light"][data-finish="wood"] .tree-panel {
  background: linear-gradient(180deg, #f0d6ad, #e6c596);
  border-color: #8b6038;
}

/* ---------- CIRCUIT (PCB) ---------- */
body[data-theme="dark"][data-finish="pcb"] {
  --panel: #103424;
  --panel-2: #0c2a1d;
  --panel-edge: #1d5638;
  --inkline: #2a7a52;
  --led-off: #0d2618;
  --led-off-edge: #1c4630;
  --ink: #c8f0d2;
  --ink-dim: #7fc89a;
  --ink-faint: #4a8a64;
}
body[data-theme="dark"][data-finish="pcb"] .device::before {
  content: ""; position: absolute; inset: 12px; border-radius: 18px; pointer-events: none;
  background:
    radial-gradient(2px 2px at 12% 18%, #b8d8b8 99%, transparent),
    radial-gradient(2px 2px at 78% 22%, #b8d8b8 99%, transparent),
    radial-gradient(2px 2px at 28% 92%, #b8d8b8 99%, transparent),
    radial-gradient(2px 2px at 88% 88%, #b8d8b8 99%, transparent),
    linear-gradient(90deg, transparent 0 9.7%, rgba(184,216,184,.07) 9.7% 10%, transparent 10% 100%),
    linear-gradient(0deg, transparent 0 49.7%, rgba(184,216,184,.06) 49.7% 50%, transparent 50% 100%);
  background-size: auto, auto, auto, auto, 60px 60px, 60px 60px;
  opacity: .55;
  mix-blend-mode: screen;
}
body[data-theme="light"][data-finish="pcb"] {
  --panel: #d4e8c8;
  --panel-2: #c4dcb4;
  --panel-edge: #6a9354;
  --inkline: #4a6e38;
  --led-off: #b8d0a0;
  --led-off-edge: #87a86d;
  --ink: #1a3010;
  --ink-dim: #3e5a28;
  --ink-faint: #6a8050;
}
body[data-theme="light"][data-finish="pcb"] .device::before {
  content: ""; position: absolute; inset: 12px; border-radius: 18px; pointer-events: none;
  background:
    radial-gradient(2px 2px at 12% 18%, rgba(0,0,0,.25) 99%, transparent),
    radial-gradient(2px 2px at 78% 22%, rgba(0,0,0,.25) 99%, transparent),
    radial-gradient(2px 2px at 28% 92%, rgba(0,0,0,.25) 99%, transparent),
    radial-gradient(2px 2px at 88% 88%, rgba(0,0,0,.25) 99%, transparent),
    linear-gradient(90deg, transparent 0 9.7%, rgba(0,0,0,.07) 9.7% 10%, transparent 10% 100%),
    linear-gradient(0deg, transparent 0 49.7%, rgba(0,0,0,.06) 49.7% 50%, transparent 50% 100%);
  background-size: auto, auto, auto, auto, 60px 60px, 60px 60px;
  opacity: .7;
  mix-blend-mode: multiply;
}

/* screws */
.screw {
  position: absolute; width: 10px; height: 10px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #6e7889, #2a3142 60%, #15181f);
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.4), 0 1px 0 rgba(255,255,255,.04);
}
.screw::after {
  content:""; position:absolute; inset:2px; border-radius:50%;
  background: linear-gradient(35deg, transparent 44%, rgba(0,0,0,.5) 45% 55%, transparent 56%);
}
.screw.tl { top: 10px; left: 10px; }
.screw.tr { top: 10px; right: 10px; }
.screw.bl { bottom: 10px; left: 10px; }
.screw.br { bottom: 10px; right: 10px; }

/* ---------- device head ---------- */
.device-head { text-align: center; padding: 6px 6px 4px; }
.status-strip {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 12px;
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  border-radius: 999px;
  margin: 0 auto 14px;
  width: max-content;
  font: 600 10px/1 var(--f-mono); letter-spacing: .22em; color: var(--ink-dim);
}
.led-pill {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 8px var(--glow), inset 0 0 2px rgba(255,255,255,.5);
  animation: pulse 2.4s ease-in-out infinite;
}
.signal-bars { display: inline-flex; gap: 2px; align-items: flex-end; height: 11px; }
.signal-bars i {
  display: block; width: 3px; background: var(--ink-faint); border-radius: 1px;
  opacity: .35; transition: opacity .2s, background .2s;
}
.signal-bars i:nth-child(1){height:3px}
.signal-bars i:nth-child(2){height:5px}
.signal-bars i:nth-child(3){height:7px}
.signal-bars i:nth-child(4){height:9px}
.signal-bars i:nth-child(5){height:11px}
.transmitting .signal-bars i {
  background: var(--glow); opacity: .85;
  animation: barWave 1.2s ease-in-out infinite;
}
.transmitting .signal-bars i:nth-child(2){animation-delay:.1s}
.transmitting .signal-bars i:nth-child(3){animation-delay:.2s}
.transmitting .signal-bars i:nth-child(4){animation-delay:.3s}
.transmitting .signal-bars i:nth-child(5){animation-delay:.4s}
@keyframes barWave { 0%,100%{opacity:.35} 50%{opacity:1} }

.antenna { display: inline-block; color: var(--ink-dim); margin: 2px auto -2px; }
.antenna-svg { width: 72px; height: 50px; display: block; }
.transmitting .antenna .wave { animation: waveLight 1s ease-in-out infinite; }
.transmitting .antenna .w1 { color: var(--glow); }
.transmitting .antenna .w2 { animation-delay: .15s; }
.transmitting .antenna .w3 { animation-delay: .3s; }
@keyframes waveLight {
  0%,100% { stroke: currentColor; opacity: .55; }
  50%     { stroke: var(--glow); opacity: 1; filter: drop-shadow(0 0 6px var(--glow)); }
}

.device-title {
  font: 700 18px/1 var(--f-mono);
  letter-spacing: .32em;
  margin: 10px 0 8px;
  color: var(--ink);
}
body[data-font="serif"] .device-title { font-family: var(--f-serif); letter-spacing: .08em; font-weight: 400; font-size: 24px; }
body[data-font="grotesk"] .device-title { font-family: var(--f-sans); letter-spacing: .22em; }
.device-sub {
  font: 500 10px/1 var(--f-mono);
  letter-spacing: .22em;
  color: var(--ink-faint);
  text-transform: uppercase;
  margin: 0 0 6px;
}

/* =========================================================
   TREE PANEL
   ========================================================= */
.tree-panel {
  position: relative;
  background: linear-gradient(180deg, var(--panel-2), color-mix(in oklab, var(--panel-2) 92%, black));
  border: 1px solid var(--panel-edge);
  border-radius: 16px;
  padding: 18px 4px 14px;
  margin-top: 12px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04), inset 0 0 60px rgba(0,0,0,.35);
  overflow: hidden;
}
body[data-finish="pcb"] .tree-panel {
  background: linear-gradient(180deg, #0d2a1c, #0a1f15);
}
.tree-panel::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(220px 110px at 50% -10%, color-mix(in oklab, var(--glow) 12%, transparent), transparent 70%);
  pointer-events: none;
}
#tree-svg { width: 100%; height: auto; display: block; position: relative; z-index: 1; overflow: visible; }

/* =========================================================
   TREE — LEDs, branches, path gradient
   ========================================================= */

/* connector lines */
#tree-svg .branch {
  stroke: var(--inkline);
  stroke-width: 2.4;
  stroke-linecap: round;
  fill: none;
  opacity: .8;
  transition: stroke .35s, filter .35s, stroke-width .35s, opacity .35s;
}
#tree-svg .branch.lit {
  /* step-pos ramps 0..1 along the path. Earlier steps are dimmer. */
  --t: var(--step-pos, 1);
  stroke: color-mix(in oklab, var(--glow) calc(30% + 70% * var(--t)), var(--inkline));
  stroke-width: calc(2.4px + 1.6px * var(--t));
  opacity: calc(.35 + .65 * var(--t));
  filter: drop-shadow(0 0 calc(1px + 5px * var(--t)) color-mix(in oklab, var(--glow) 70%, transparent));
}

/* LED + its glyph share a <g class="led-g"> */
#tree-svg .led-g .led {
  fill: var(--led-off);
  stroke: var(--led-off-edge);
  stroke-width: 1.2;
  transition: fill .2s, stroke .2s, filter .25s, transform .25s;
}
#tree-svg .led-g .led-glyph {
  font: 700 19px/1 var(--f-mono);
  fill: var(--ink-dim);
  text-anchor: middle;
  dominant-baseline: middle;
  pointer-events: none;
  transition: fill .2s;
}

/* lit (path) — partial intensity based on --step-pos */
#tree-svg .led-g.lit {
  --t: var(--step-pos, 1);
}
#tree-svg .led-g.lit .led {
  fill: color-mix(in oklab, var(--glow) calc(40% + 60% * var(--t)), var(--led-off));
  stroke: color-mix(in oklab, var(--glow) calc(50% + 50% * var(--t)), var(--led-off-edge));
  opacity: calc(.55 + .45 * var(--t));
  filter:
    drop-shadow(0 0 calc(1px + 5px * var(--t)) color-mix(in oklab, var(--glow) 80%, transparent))
    drop-shadow(0 0 calc(3px + 12px * var(--t)) color-mix(in oklab, var(--glow) 50%, transparent));
}
#tree-svg .led-g.lit .led-glyph {
  /* For lit LEDs the fill is bright; text goes dark for contrast. */
  fill: var(--on-led-ink);
  opacity: calc(.6 + .4 * var(--t));
}

/* final (target letter) — full intensity glow + pop */
#tree-svg .led-g.final .led {
  fill: var(--glow);
  stroke: color-mix(in oklab, var(--glow) 60%, white 30%);
  filter:
    drop-shadow(0 0 6px var(--glow))
    drop-shadow(0 0 18px color-mix(in oklab, var(--glow) 70%, transparent));
  animation: ledPop .55s ease-out 1;
}
#tree-svg .led-g.final .led-glyph {
  fill: var(--on-led-ink);
}
@keyframes ledPop {
  0%   { transform: scale(.7); }
  50%  { transform: scale(1.35); }
  100% { transform: scale(1); }
}

/* root antenna — see consolidated definition below near .chip-g */

/* number / punctuation chips */
#tree-svg .chip-box {
  fill: var(--led-off);
  stroke: var(--led-off-edge);
  stroke-width: 1.4;
  transition: fill .18s, stroke .18s, filter .25s;
}
#tree-svg .chip-letter {
  font: 700 26px/1 var(--f-display);
  fill: var(--ink);
  dominant-baseline: middle;
  text-anchor: middle;
  pointer-events: none;
  transition: fill .18s;
}
#tree-svg .chip-code {
  font: 600 13px/1 var(--f-mono);
  fill: var(--ink-dim);
  letter-spacing: .1em;
  dominant-baseline: middle;
  text-anchor: middle;
  pointer-events: none;
  transition: fill .18s;
}
#tree-svg .chip-g.lit {
  --t: var(--step-pos, 1);
}
#tree-svg .chip-g.lit .chip-box {
  fill: color-mix(in oklab, var(--glow) calc(65% + 35% * var(--t)), var(--led-off));
  stroke: color-mix(in oklab, var(--glow) calc(75% + 25% * var(--t)), var(--led-off-edge));
  filter:
    drop-shadow(0 0 calc(4px + 3px * var(--t)) color-mix(in oklab, var(--glow) 70%, transparent))
    drop-shadow(0 0 calc(8px + 8px * var(--t)) color-mix(in oklab, var(--glow) 45%, transparent));
}
#tree-svg .chip-g.final .chip-box {
  fill: var(--glow);
  stroke: color-mix(in oklab, var(--glow) 60%, white 30%);
  filter:
    drop-shadow(0 0 6px var(--glow))
    drop-shadow(0 0 18px color-mix(in oklab, var(--glow) 70%, transparent));
  animation: ledPop .55s ease-out 1;
}
#tree-svg .chip-g.lit .chip-letter,
#tree-svg .chip-g.final .chip-letter,
#tree-svg .chip-g.lit .chip-code,
#tree-svg .chip-g.final .chip-code { fill: var(--on-led-ink); }

/* root antenna icon */
#tree-svg .root-mast { stroke: var(--ink-faint); stroke-width: 1.4; }
#tree-svg .root-core { fill: var(--ink-dim); }
body.transmitting #tree-svg .root-core { fill: var(--glow); filter: drop-shadow(0 0 6px var(--glow)); }

/* big letter spotlight — sits at the TOP of the tree panel
   (between the antenna and the E/T row) so big circular LEDs
   don't bury it. */
.letter-spot {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center;
  justify-content: flex-start;
  padding-top: 30px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .25s;
}
.letter-spot.show { opacity: 1; }
.letter-spot::before {
  content: ""; position: absolute;
  top: 0; left: 50%; transform: translateX(-50%);
  width: 200px; height: 180px; border-radius: 50%;
  background: radial-gradient(circle at 50% 30%, color-mix(in oklab, var(--glow) 32%, transparent), transparent 65%);
  filter: blur(2px);
}
.ls-glyph {
  position: relative;
  font: 700 72px/1 var(--f-display);
  color: var(--glow);
  text-shadow:
    0 0 30px color-mix(in oklab, var(--glow) 60%, transparent),
    0 0 8px color-mix(in oklab, var(--glow) 80%, transparent);
  letter-spacing: 0;
}
body[data-font="serif"] .ls-glyph { font-weight: 400; font-size: 96px; }
.ls-morse {
  position: relative;
  margin-top: 4px;
  font: 600 12px/1 var(--f-mono);
  letter-spacing: .35em;
  color: color-mix(in oklab, var(--glow) 85%, white 5%);
}

/* =========================================================
   READOUT
   ========================================================= */
.readout {
  margin-top: 12px;
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  border-radius: 14px;
  padding: 10px 12px;
  display: flex; flex-direction: column; gap: 8px;
}
.readout-row { display: flex; align-items: center; gap: 10px; min-height: 28px; }
.readout-label {
  font: 700 9px/1 var(--f-mono); letter-spacing: .22em; color: var(--ink-faint);
  width: 64px; flex-shrink: 0;
}
.readout-marks {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 4px;
  font: 600 18px/1 var(--f-mono);
  color: var(--glow);
  letter-spacing: .15em;
  overflow: hidden; white-space: nowrap;
  text-shadow: 0 0 8px color-mix(in oklab, var(--glow) 50%, transparent);
}
.readout-marks .rm-placeholder {
  color: var(--ink-faint); font-weight: 500;
  font-size: 11px; letter-spacing: .18em; text-shadow: none;
  text-transform: uppercase;
}
.decode-countdown {
  width: 60px; height: 3px; background: var(--led-off);
  border-radius: 2px; overflow: hidden;
}
.dc-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--glow), color-mix(in oklab, var(--glow) 60%, white));
  box-shadow: 0 0 6px var(--glow);
  transition: width .04s linear;
}
.readout-text {
  flex: 1; min-width: 0;
  font: 700 16px/1.2 var(--f-display);
  color: var(--ink); letter-spacing: .04em;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  min-height: 20px;
}
.readout-text:empty::before { content: attr(data-empty); color: var(--ink-faint); font-weight: 500; font-size: 12px; }
.readout-tools { display: flex; gap: 4px; }
.ghostbtn {
  width: 30px; height: 28px; border-radius: 8px;
  background: transparent; border: 1px solid var(--panel-edge);
  color: var(--ink-dim);
  display: inline-flex; align-items: center; justify-content: center;
  transition: background .15s, color .15s, border-color .15s;
}
.ghostbtn svg { width: 14px; height: 14px; }
.ghostbtn:hover { color: var(--ink); border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge)); background: rgba(255,255,255,.03); }
body[data-theme="light"] .ghostbtn:hover { background: rgba(0,0,0,.04); }
.ghostbtn.copied { color: var(--final); border-color: var(--final); }

/* ---------- history tape ---------- */
.history-row { gap: 8px; }
.history-tape {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 2px 2px;
  scroll-behavior: smooth;
  min-height: 30px;
}
.history-tape::-webkit-scrollbar { display: none; }
.history-tape[data-state="empty"]::before {
  content: attr(data-empty);
  color: var(--ink-faint);
  font: 500 11px/1 var(--f-mono); letter-spacing: .18em; text-transform: uppercase;
}
.ht-chip {
  flex-shrink: 0;
  background: var(--panel); border: 1px solid var(--panel-edge);
  border-radius: 8px; padding: 4px 7px 5px;
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .12s;
}
.ht-chip:hover { border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge)); background: var(--panel-2); }
.ht-chip:active { transform: translateY(1px); }
.ht-ch {
  font: 700 13px/1 var(--f-display);
  color: var(--ink); letter-spacing: 0;
}
.ht-code {
  font: 600 7px/1 var(--f-mono); letter-spacing: .1em;
  color: var(--glow);
  text-shadow: 0 0 4px color-mix(in oklab, var(--glow) 40%, transparent);
}
.ht-chip.fresh {
  animation: chipPop .55s ease-out 1;
  border-color: color-mix(in oklab, var(--final) 60%, var(--panel-edge));
}
.ht-chip.fresh .ht-ch { color: var(--final); }
@keyframes chipPop {
  0%   { transform: scale(.6); opacity: 0; }
  50%  { transform: scale(1.12); }
  100% { transform: scale(1); opacity: 1; }
}
.ht-sep {
  flex-shrink: 0;
  width: 1px; height: 20px;
  background: var(--panel-edge);
  margin: 0 4px;
}

/* =========================================================
   INPUT BAY
   ========================================================= */
.inputbay {
  margin-top: 12px;
}
.tabs {
  display: flex; gap: 4px; padding: 4px;
  background: var(--panel-2); border: 1px solid var(--panel-edge);
  border-radius: 12px;
}
.tab {
  flex: 1; background: transparent; border: 0;
  padding: 8px 6px; border-radius: 8px;
  font: 700 10px/1 var(--f-mono); letter-spacing: .14em;
  color: var(--ink-faint); transition: background .18s, color .18s;
}
.tab:hover { color: var(--ink-dim); }
.tab.active {
  color: var(--ink); background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--panel-edge);
}
.tabpanel {
  margin-top: 12px;
  display: flex; flex-direction: column; gap: 10px;
  height: 290px;
}
.tabpanel > textarea { flex: 1; min-height: 0; }
.tabpanel .preview { flex: 0 0 auto; }

/* keypad */
.keypad {
  position: relative;
  flex: 1; min-height: 180px;
  border-radius: 14px;
  background:
    radial-gradient(120% 80% at 50% 0%, color-mix(in oklab, var(--panel-2) 80%, white 4%), var(--panel-2));
  border: 1px solid var(--panel-edge);
  display: flex; align-items: center; justify-content: center;
  user-select: none; -webkit-user-select: none;
  cursor: pointer; touch-action: manipulation;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.4);
  transition: transform .08s, background .15s, box-shadow .15s;
}
.keypad:hover .keypad-symbol { color: var(--ink-dim); }
.keypad.pressed {
  transform: translateY(1px);
  background:
    radial-gradient(120% 80% at 50% 100%, color-mix(in oklab, var(--glow) 30%, var(--panel-2)), var(--panel-2));
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--glow) 50%, transparent),
              inset 0 0 30px color-mix(in oklab, var(--glow) 30%, transparent);
}
.keypad.pressed .keypad-symbol { color: var(--glow); text-shadow: 0 0 12px var(--glow); }
.keypad-inner { display: flex; flex-direction: column; align-items: center; gap: 4px; pointer-events: none; }
.keypad-label { font: 700 10px/1 var(--f-mono); letter-spacing: .25em; color: var(--ink-faint); }
.keypad-symbol { font: 700 64px/1 var(--f-display); color: var(--ink-faint); transition: color .15s, text-shadow .15s; }
.keypad-hint { font: 500 10px/1 var(--f-mono); letter-spacing: .12em; color: var(--ink-faint); }
.keypad-ring {
  position: absolute; inset: 8px; border-radius: 10px;
  border: 1px dashed color-mix(in oklab, var(--panel-edge) 80%, transparent);
  pointer-events: none;
}

.key-aux { display: flex; gap: 6px; flex-wrap: wrap; }
.pillbtn {
  flex: 1; min-width: 64px;
  background: var(--panel-2); color: var(--ink);
  border: 1px solid var(--panel-edge);
  padding: 9px 12px; border-radius: 999px;
  font: 700 11px/1 var(--f-mono); letter-spacing: .12em;
  transition: background .15s, border-color .15s, transform .08s;
}
.pillbtn:hover { background: var(--panel); border-color: color-mix(in oklab, var(--glow) 50%, var(--panel-edge)); }
.pillbtn:active { transform: translateY(1px); }
.pillbtn.ghost { background: transparent; color: var(--ink-dim); }

textarea {
  width: 100%; resize: none;
  min-height: 70px;
  background: var(--panel-2); color: var(--ink);
  border: 1px solid var(--panel-edge); border-radius: 12px;
  padding: 12px 14px;
  font: 500 14px/1.4 var(--f-mono);
  outline: none;
  transition: border-color .15s;
}
textarea:focus { border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge)); }
textarea::placeholder { color: var(--ink-faint); }

.row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.primarybtn {
  background: var(--glow); color: #1a1305;
  border: 0; padding: 10px 18px; border-radius: 999px;
  font: 700 12px/1 var(--f-mono); letter-spacing: .15em;
  display: inline-flex; align-items: center; gap: 6px;
  box-shadow: 0 6px 16px -8px var(--glow);
  transition: filter .15s, transform .08s;
}
.primarybtn svg { width: 14px; height: 14px; }
.primarybtn:hover { filter: brightness(1.08); }
.primarybtn:active { transform: translateY(1px); }
.primarybtn:disabled { filter: grayscale(.4) brightness(.85); cursor: not-allowed; }

.preview {
  background: var(--panel-2); border: 1px dashed var(--panel-edge);
  border-radius: 10px; padding: 10px 12px;
  font: 600 13px/1.4 var(--f-mono);
  color: var(--glow); min-height: 38px;
  letter-spacing: .12em;
  word-break: break-word;
  text-shadow: 0 0 6px color-mix(in oklab, var(--glow) 35%, transparent);
}
.preview:empty::before { content: attr(data-empty); color: var(--ink-faint); font-weight: 400; letter-spacing: 0; text-shadow: none; }

/* ---------- drill (practice mode) ---------- */
.drill-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  flex-wrap: wrap;
}
.drill-score-block {
  display: flex; align-items: baseline; gap: 8px;
}
.ds-label {
  font: 700 9px/1 var(--f-mono); letter-spacing: .22em; color: var(--ink-faint);
}
#drill-score {
  font: 700 18px/1 var(--f-display); letter-spacing: .04em; color: var(--ink);
}
.ds-streak {
  font: 700 9px/1 var(--f-mono); letter-spacing: .14em;
  color: var(--glow); padding: 4px 8px;
  background: color-mix(in oklab, var(--glow) 14%, transparent);
  border: 1px solid color-mix(in oklab, var(--glow) 35%, transparent);
  border-radius: 999px;
  opacity: 0; transition: opacity .2s;
}
.drill-pool-seg .seg-btn { font-size: 9px; padding: 6px 8px; }
.drill-mode-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
}
.dm-label {
  font: 700 9px/1 var(--f-mono); letter-spacing: .22em; color: var(--ink-faint);
}
.drill-mode-seg .seg-btn { font-size: 9px; padding: 6px 12px; }

.drill-prompt {
  position: relative;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  border-radius: 12px;
  padding: 12px 12px;
  min-height: 48px;
}
.drill-morse {
  font: 700 22px/1 var(--f-mono);
  letter-spacing: .3em;
  color: var(--glow);
  text-shadow: 0 0 10px color-mix(in oklab, var(--glow) 50%, transparent);
  transition: color .2s, text-shadow .2s, opacity .2s;
}
.drill-morse.hidden {
  color: var(--ink-faint);
  opacity: .45;
  text-shadow: none;
  letter-spacing: .3em;
}
.drill-replay {
  background: var(--panel); border: 1px solid var(--panel-edge);
  color: var(--ink-dim);
  width: 32px; height: 32px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  transition: color .15s, border-color .15s, background .15s;
}
.drill-replay svg { width: 14px; height: 14px; }
.drill-replay:hover {
  color: var(--glow);
  border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge));
  background: var(--panel-2);
}

.drill-choices {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  flex: 1; min-height: 60px;
}
.drill-choice {
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  color: var(--ink);
  padding: 6px;
  border-radius: 10px;
  font: 700 22px/1 var(--f-display);
  letter-spacing: 0;
  transition: background .15s, border-color .15s, color .15s, transform .08s;
  display: flex; align-items: center; justify-content: center;
}
.drill-choice:hover {
  background: var(--panel);
  border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge));
}
.drill-choice:active { transform: translateY(1px); }
.drill-choice.correct {
  background: color-mix(in oklab, var(--final) 24%, var(--panel-2));
  border-color: var(--final);
  color: var(--final);
  box-shadow: 0 0 0 1px var(--final), 0 0 14px color-mix(in oklab, var(--final) 50%, transparent);
  animation: pop .35s ease-out 1;
}
.drill-choice.wrong {
  background: color-mix(in oklab, #ff7a6e 22%, var(--panel-2));
  border-color: #ff7a6e;
  color: #ffb1a8;
  animation: shake .35s ease-out 1;
}
.drill-choice.reveal {
  border-color: var(--final);
  color: var(--final);
  box-shadow: inset 0 0 0 1px var(--final);
}
@keyframes pop {
  0% { transform: scale(.9); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.drill-feedback {
  min-height: 14px;
  text-align: center;
  font: 700 12px/1 var(--f-mono); letter-spacing: .14em;
  color: var(--ink-faint);
}
.drill-feedback[data-result="right"] { color: var(--final); }
.drill-feedback[data-result="wrong"] { color: #ff8c7e; }

.drill-row { justify-content: center; }
.drill-row .primarybtn { flex: 1; justify-content: center; }
.drill-row .pillbtn { flex: 0 0 auto; }

@media (max-width: 360px) {
  .drill-choice { font-size: 18px; }
}

/* =========================================================
   BOTTOM RAIL
   ========================================================= */
.rail {
  margin-top: 12px;
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  border-radius: 14px;
  padding: 10px 12px;
  display: flex; flex-direction: column; gap: 8px;
}
.rail-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

input[type=range] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 16px; background: transparent;
  accent-color: var(--glow);
}
input[type=range]::-webkit-slider-runnable-track {
  height: 4px; background: var(--led-off); border-radius: 2px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--glow); margin-top: -6px;
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--glow) 25%, transparent), 0 0 10px var(--glow);
  border: 0;
}
input[type=range]::-moz-range-track { height: 4px; background: var(--led-off); border-radius: 2px; }
input[type=range]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--glow); border: 0;
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--glow) 25%, transparent), 0 0 10px var(--glow);
}

.seg {
  display: inline-flex; background: var(--panel); border: 1px solid var(--panel-edge);
  border-radius: 999px; padding: 3px;
}
.seg-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px; border-radius: 12px; padding: 4px; }
.seg-grid:has(.seg-btn:nth-child(3)) { grid-template-columns: repeat(3, 1fr); }
.seg-grid:has(.seg-btn:nth-child(4)) { grid-template-columns: repeat(4, 1fr); }
.seg-grid:has(.seg-btn:nth-child(5)) { grid-template-columns: repeat(5, 1fr); }
.seg-btn {
  background: transparent; border: 0; color: var(--ink-dim);
  padding: 6px 10px; border-radius: 999px;
  font: 700 10px/1 var(--f-mono); letter-spacing: .14em;
  transition: background .15s, color .15s;
}
.seg-grid .seg-btn { border-radius: 9px; padding: 8px 6px; }
.seg-btn:hover { color: var(--ink); }
.seg-btn.active {
  background: var(--panel-2); color: var(--ink);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--glow) 50%, var(--panel-edge));
}

.sos {
  flex: 1;
  display: flex; align-items: center; justify-content: center; gap: 12px;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--panel-edge);
  padding: 10px 14px; border-radius: 12px;
  font: 700 14px/1 var(--f-mono); letter-spacing: .25em;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04), inset 0 -1px 0 rgba(0,0,0,.3);
  transition: filter .15s, transform .08s, border-color .15s, background .15s;
}
.sos:hover {
  background: var(--panel-2);
  border-color: color-mix(in oklab, var(--glow) 50%, var(--panel-edge));
}
.sos:active { transform: translateY(1px); }
.sos-glyph { font-size: 10px; letter-spacing: .04em; color: var(--ink-faint); }
.sos strong { color: var(--glow); }
.sos:disabled { filter: grayscale(.4) brightness(.85); cursor: not-allowed; }

.audiotoggle {
  background: var(--panel); border: 1px solid var(--panel-edge);
  color: var(--ink-dim); padding: 8px 12px; border-radius: 999px;
  display: inline-flex; align-items: center; gap: 6px;
  font: 600 10px/1 var(--f-mono); letter-spacing: .16em;
}
.audiotoggle svg { width: 14px; height: 14px; }
.audiotoggle[aria-pressed="false"] { color: var(--ink-faint); text-decoration: line-through; }
.audiotoggle[aria-pressed="true"] { color: var(--glow); border-color: color-mix(in oklab, var(--glow) 50%, var(--panel-edge)); }

.device-foot {
  margin-top: 14px; text-align: center;
  font: 500 9px/1 var(--f-mono); letter-spacing: .3em;
  color: var(--ink-faint);
}

/* =========================================================
   DRAWERS
   ========================================================= */
.scrim {
  position: fixed; inset: 0; background: rgba(0,0,0,.5);
  z-index: 90; backdrop-filter: blur(2px);
  animation: fadeIn .2s;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.drawer {
  position: fixed; top: 0; left: 0;
  height: 100dvh; width: min(360px, 92vw);
  background: var(--panel);
  border-right: 1px solid var(--panel-edge);
  z-index: 100;
  display: flex; flex-direction: column;
  animation: slideInL .26s cubic-bezier(.2,.7,.2,1);
  box-shadow: 12px 0 40px rgba(0,0,0,.5);
}
.drawer.right {
  left: auto; right: 0;
  border-right: 0; border-left: 1px solid var(--panel-edge);
  animation-name: slideInR;
  box-shadow: -12px 0 40px rgba(0,0,0,.5);
}
@keyframes slideInL { from { transform: translateX(-100%); } to { transform: translateX(0); } }
@keyframes slideInR { from { transform: translateX(100%); } to { transform: translateX(0); } }
.drawer-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--panel-edge);
}
.drawer-head h2 {
  margin: 0; font: 700 13px/1 var(--f-mono); letter-spacing: .2em; color: var(--ink);
}
.drawer-body {
  flex: 1; overflow-y: auto;
  padding: 16px;
  display: flex; flex-direction: column; gap: 18px;
}

/* ---------- help drawer ---------- */
.help-lead {
  margin: 0 0 4px;
  font: 500 13px/1.5 var(--f-mono);
  color: var(--ink-dim); letter-spacing: .02em;
}
.help-section {
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  border-radius: 10px;
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 8px;
}
.help-section h3 {
  margin: 0;
  font: 700 11px/1.3 var(--f-mono); letter-spacing: .16em;
  color: var(--ink); text-transform: uppercase;
  display: flex; align-items: center; gap: 8px;
}
.help-section .hs-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: color-mix(in oklab, var(--glow) 18%, transparent);
  border: 1px solid color-mix(in oklab, var(--glow) 45%, transparent);
  color: var(--glow);
  font: 700 10px/1 var(--f-mono); letter-spacing: 0;
  flex-shrink: 0;
}
.help-section .hs-sub {
  font-weight: 500; color: var(--ink-faint); letter-spacing: .04em; text-transform: none;
  font-size: 10px;
}
.help-note {
  margin: 4px 0 0;
  font: 500 11px/1.4 var(--f-mono);
  color: var(--ink-faint); letter-spacing: .02em;
  padding-top: 6px;
  border-top: 1px dashed var(--panel-edge);
}
/* tip-list (used inside help-section) */
.tip-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 6px;
}
.tip-list li {
  display: flex; align-items: center; gap: 10px;
  font: 500 12px/1.3 var(--f-mono);
  color: var(--ink-dim); letter-spacing: .02em;
}
.tip-list li span { flex: 1; color: var(--ink-faint); }
.tip-list li span b { color: var(--ink); font-weight: 700; }
.tip-list kbd { flex-shrink: 0; }

/* ---------- reference drawer ---------- */
.ref-section { display: flex; flex-direction: column; gap: 8px; }
.ref-section h3 {
  margin: 0 0 4px;
  font: 700 10px/1 var(--f-mono); letter-spacing: .22em; color: var(--ink-faint);
  text-transform: uppercase;
}
.ref-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 5px;
}
.ref-cell {
  background: var(--panel-2);
  border: 1px solid var(--panel-edge);
  border-radius: 7px;
  padding: 4px 4px 4px;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  font: 700 11px/1 var(--f-mono);
  color: var(--ink-dim);
  text-align: center;
  transition: border-color .15s, background .15s;
}
.ref-cell:hover { border-color: color-mix(in oklab, var(--glow) 60%, var(--panel-edge)); background: var(--panel); }
.ref-cell .rc-letter { color: var(--ink); font-size: 14px; }
.ref-cell .rc-code {
  color: var(--glow); font-size: 9px; letter-spacing: .12em;
  text-shadow: 0 0 4px color-mix(in oklab, var(--glow) 30%, transparent);
}
.ref-tip {
  margin-top: 6px; padding: 12px; border-radius: 10px;
  background: var(--panel-2); border: 1px solid var(--panel-edge);
  font: 500 12px/1.5 var(--f-mono); color: var(--ink-dim);
}
.ref-tip strong { color: var(--glow); letter-spacing: .12em; }

/* tweaks */
.tweak { display: flex; flex-direction: column; gap: 8px; }
.tweak-label {
  font: 700 10px/1 var(--f-mono); letter-spacing: .22em; color: var(--ink-faint);
  display: flex; justify-content: space-between; align-items: baseline;
}
.tweak-label b { color: var(--glow); font-size: 12px; letter-spacing: .04em; }
.tweak-help {
  margin: 0; font: 500 11px/1.5 var(--f-mono);
  color: var(--ink-faint); letter-spacing: .04em;
}
.tweak-help.footer-help { margin-top: 8px; padding-top: 12px; border-top: 1px solid var(--panel-edge); }

/* reset-to-defaults button */
.resetbtn {
  width: 100%;
  background: var(--panel-2); color: var(--ink-dim);
  border: 1px solid var(--panel-edge); border-radius: 10px;
  padding: 10px 12px;
  font: 700 10px/1 var(--f-mono); letter-spacing: .16em;
  transition: background .15s, border-color .15s, color .15s, transform .08s;
}
.resetbtn:hover {
  color: var(--glow);
  border-color: color-mix(in oklab, var(--glow) 55%, var(--panel-edge));
  background: var(--panel);
}
.resetbtn:active { transform: translateY(1px); }

/* about-drawer link */
.about-link {
  color: var(--glow); text-decoration: none;
  border-bottom: 1px solid color-mix(in oklab, var(--glow) 45%, transparent);
  transition: border-color .15s;
}
.about-link:hover { border-bottom-color: var(--glow); }

.swatches { display: flex; gap: 8px; }
.swatches .sw {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--c); border: 2px solid transparent;
  box-shadow: 0 0 0 2px var(--panel), 0 0 14px color-mix(in oklab, var(--c) 50%, transparent);
  transition: transform .12s, border-color .15s;
}
.swatches .sw:hover { transform: scale(1.08); }
.swatches .sw.active { border-color: var(--ink); }

/* =========================================================
   UTILS / MOTION
   ========================================================= */
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--glow) 0%, transparent), 0 0 8px var(--glow), inset 0 0 2px rgba(255,255,255,.5); }
  50%      { box-shadow: 0 0 0 4px color-mix(in oklab, var(--glow) 20%, transparent), 0 0 12px var(--glow), inset 0 0 2px rgba(255,255,255,.5); }
}

/* small */
@media (max-width: 420px) {
  .stage { padding: 6px 10px 40px; }
  .device { padding: 18px 16px; }
  .ls-glyph { font-size: 76px; }
}

/* wider — keep device phone-shape but float drawer-toggle hints */
@media (min-width: 720px) {
  .stage { padding: 24px 16px 80px; }
}