:root {
  --bg: #000; --panel: #1c1c1e; --key: #2a2a2d; --key-hi: #4a4a50;
  --text: #f5f5f7; --dim: #8e8e93; --accent: #0a84ff;
  --green: #30d158; --amber: #ff9f0a; --red: #ff453a; --grey: #636366;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --pad: max(190px, min(280px, calc(100vw - 64px), calc(100dvh - 450px)));
}
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body {
  margin: 0; background: var(--bg); color: var(--text);
  overscroll-behavior: none; overflow: hidden; touch-action: manipulation;
}
body {
  position: fixed; inset: 0; height: 100dvh; width: 100%;
  font: 16px/1.35 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-user-select: none; user-select: none; -webkit-touch-callout: none;
  -webkit-text-size-adjust: 100%;
}
button, a { -webkit-touch-callout: none; font-family: inherit; }
svg { pointer-events: none; }
.ic { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.ic.sm { width: 20px; height: 20px; }

#app {
  height: 100%; max-width: 440px; margin: 0 auto; display: flex; flex-direction: column;
  padding: calc(env(safe-area-inset-top) + 8px) calc(env(safe-area-inset-right) + 18px)
           calc(env(safe-area-inset-bottom) + 10px) calc(env(safe-area-inset-left) + 18px);
}

/* Top bar */
.top { display: flex; align-items: center; justify-content: space-between; min-height: 56px; flex: none; }
.conn { display: flex; align-items: center; gap: 10px; min-width: 0; }
.connText { display: flex; flex-direction: column; min-width: 0; }
.connText b { font-size: 15px; font-weight: 600; line-height: 1.2; }
.connText small { font-size: 12px; color: var(--dim); line-height: 1.2; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--grey); flex: none; transition: background-color .25s, box-shadow .25s; }
.dot.connected { background: var(--green); box-shadow: 0 0 8px rgba(48, 209, 88, .7); }
.dot.connecting, .dot.waiting { background: var(--amber); box-shadow: 0 0 8px rgba(255, 159, 10, .55); }
.dot.error { background: var(--red); }
.tools { display: flex; align-items: center; gap: 10px; }
.icobtn {
  width: 48px; height: 48px; border: 0; border-radius: 50%; background: transparent; color: var(--dim);
  display: flex; align-items: center; justify-content: center;
  transition: transform .12s var(--ease), background-color .12s, color .12s;
}
.icobtn.down { transform: scale(.92); background: #1c1c1e; color: var(--text); transition: none; }
.hint { flex: none; color: var(--amber); font-size: 13px; text-align: center; padding: 2px 8px 6px; }
.hint:empty { display: none; }

/* Keys */
.key {
  appearance: none; -webkit-appearance: none; border: 0; margin: 0; padding: 0 14px;
  min-width: 56px; min-height: 56px; border-radius: 30px; background: var(--key); color: var(--text);
  font: 600 15px/1 -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  display: flex; align-items: center; justify-content: center; gap: 7px;
  touch-action: manipulation; -webkit-user-select: none; user-select: none;
  transition: transform .12s var(--ease), background-color .12s var(--ease);
}
.key.down { background: var(--key-hi); transform: scale(.94); transition: none; }
.power { width: 56px; padding: 0; background: var(--red); color: #fff; }
.power.down { background: #ff7a70; }

/* Remote layout */
.stage { position: relative; flex: 1; min-height: 0; display: flex; align-items: center; justify-content: center; }
.remote { width: 100%; display: flex; flex-direction: column; align-items: center; gap: clamp(10px, 2.2dvh, 20px); }
.row { width: 100%; display: grid; gap: 12px; }
.r3 { grid-template-columns: repeat(3, 1fr); }
.r2 { grid-template-columns: repeat(2, 1fr); }
.row .key { width: 100%; }
.rmid { grid-template-columns: repeat(3, 1fr); align-items: center; }
.cell { display: flex; justify-content: center; }
.row .key.mute { width: 64px; height: 64px; border-radius: 50%; padding: 0; }
.apps .key { min-height: 52px; font-size: 14px; }

/* Rockers */
.rocker { width: 68px; display: flex; flex-direction: column; align-items: center; background: var(--key); border-radius: 34px; padding: 4px; }
.rocker .key.rk { width: 100%; min-width: 0; min-height: 58px; padding: 0; background: transparent; border-radius: 30px; }
.rocker .key.rk.down { background: rgba(255, 255, 255, .17); }
.rl { font-size: 11px; font-weight: 600; letter-spacing: .08em; color: var(--dim); line-height: 14px; }

/* Touchpad */
.pad {
  position: relative; width: var(--pad); height: var(--pad); border-radius: 38px; overflow: hidden;
  background: linear-gradient(155deg, #353539 0%, #222225 55%, #19191b 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .09), inset 0 0 0 1px rgba(255, 255, 255, .035), 0 14px 32px rgba(0, 0, 0, .65);
  touch-action: none; -webkit-user-select: none; user-select: none;
  transition: transform .14s var(--ease);
}
.pad.down { transform: scale(.992); transition: none; }
.e { position: absolute; width: 9px; height: 9px; border: solid rgba(255, 255, 255, .26); border-width: 0 2.5px 2.5px 0; pointer-events: none; }
.eu { top: 16px; left: calc(50% - 4.5px); transform: rotate(-135deg); }
.ed { bottom: 16px; left: calc(50% - 4.5px); transform: rotate(45deg); }
.el { left: 16px; top: calc(50% - 4.5px); transform: rotate(135deg); }
.er { right: 16px; top: calc(50% - 4.5px); transform: rotate(-45deg); }
.glow {
  position: absolute; left: 0; top: 0; width: 160px; height: 160px; margin: -80px 0 0 -80px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, .26), rgba(255, 255, 255, 0) 65%);
  opacity: 0; transition: opacity .28s; pointer-events: none; will-change: transform;
}
.pad.down .glow { opacity: 1; transition: none; }
.ripple {
  position: absolute; left: 0; top: 0; width: 120px; height: 120px; margin: -60px 0 0 -60px; border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .5); background: rgba(255, 255, 255, .12); opacity: 0; pointer-events: none;
}

/* Onboarding */
.onboard {
  position: absolute; inset: 0; z-index: 5; display: flex; align-items: center; justify-content: center;
  background: rgba(0, 0, 0, .7); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
}
.obcard { width: 100%; background: var(--panel); border-radius: 28px; padding: 22px 20px; box-shadow: 0 20px 50px rgba(0, 0, 0, .6); }
.obcard h2 { margin: 0 0 14px; font-size: 22px; }
.obcard ol { list-style: none; margin: 0; padding: 0; }
.obcard li { display: flex; gap: 14px; margin-bottom: 18px; }
.obcard p { margin: 3px 0 10px; color: var(--dim); font-size: 14px; }
.obcard .obnote { margin: 0; text-align: center; font-size: 13px; }
.n { flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; font-size: 14px; display: flex; align-items: center; justify-content: center; margin-top: 1px; }

.btn {
  display: flex; align-items: center; justify-content: center; width: 100%; min-height: 50px; padding: 12px 14px; border: 0; border-radius: 14px;
  background: var(--accent); color: #fff; font: 600 16px/1.2 inherit; text-decoration: none; text-align: center; margin: 6px 0;
  transition: transform .12s var(--ease), filter .12s; touch-action: manipulation;
}
.btn:active, .btn.down { transform: scale(.97); filter: brightness(1.2); }
.btn.green { background: var(--green); color: #000; }
.btn.danger { background: #2c1b1b; color: var(--red); }

/* Settings sheet */
.sheet { position: fixed; inset: 0; z-index: 20; visibility: hidden; transition: visibility 0s .32s; }
.sheet.open { visibility: visible; transition-delay: 0s; }
.backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, .55); opacity: 0; transition: opacity .3s; }
.sheet.open .backdrop { opacity: 1; }
.panel {
  position: absolute; left: 0; right: 0; bottom: 0; margin: 0 auto; max-width: 480px; max-height: 90dvh;
  overflow-y: auto; overscroll-behavior: contain; -webkit-overflow-scrolling: touch;
  background: var(--panel); border-radius: 26px 26px 0 0; padding: 14px 20px calc(env(safe-area-inset-bottom) + 24px);
  transform: translateY(102%); transition: transform .32s var(--ease); touch-action: pan-y;
}
.sheet.open .panel { transform: none; }
.phead { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.phead h2 { margin: 0; font-size: 22px; }
.done { border: 0; background: transparent; color: var(--accent); font: 600 17px inherit; padding: 10px 4px 10px 14px; min-height: 44px; }
.fl { display: block; margin: 12px 0 4px; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--dim); }
input[type=text] {
  width: 100%; min-height: 46px; padding: 10px 12px; border-radius: 12px; border: 1px solid #3a3a3c;
  background: #000; color: var(--text); font: 16px inherit; -webkit-user-select: text; user-select: text; -webkit-appearance: none;
}
input[type=text].bad { border-color: var(--red); }
.fe { color: var(--red); font-size: 13px; }
.fe:empty { display: none; }
.note { margin: 2px 2px 8px; color: var(--dim); font-size: 13px; }
.trow { display: flex; align-items: center; justify-content: space-between; min-height: 50px; margin: 6px 2px; font-size: 16px; }
.tg { position: relative; width: 51px; height: 31px; display: block; }
.tg input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; z-index: 1; }
.tg i { position: absolute; inset: 0; border-radius: 16px; background: #39393d; transition: background-color .2s; }
.tg i::after { content: ""; position: absolute; top: 2px; left: 2px; width: 27px; height: 27px; border-radius: 50%; background: #fff; box-shadow: 0 2px 4px rgba(0, 0, 0, .3); transition: transform .2s var(--ease); }
.tg input:checked + i { background: var(--green); }
.tg input:checked + i::after { transform: translateX(20px); }
.diag { margin-top: 14px; border-top: 1px solid #2c2c2e; padding-top: 10px; }
.diag summary { color: var(--dim); font-size: 14px; min-height: 36px; display: flex; align-items: center; }
#log { font: 12px/1.45 ui-monospace, Menlo, monospace; max-height: 240px; overflow-y: auto; white-space: pre-wrap; word-break: break-all; -webkit-user-select: text; user-select: text; }
#log div { padding: 2px 0; border-bottom: 1px solid #2c2c2e; }
#log .err { color: var(--red); } #log .ok { color: var(--green); } #log .hint { color: var(--amber); }

/* Off-screen haptic switch (must stay rendered, not display:none) */
.hx { position: fixed; left: -200px; top: 0; width: 40px; height: 24px; opacity: 0; pointer-events: none; }