/* Instrument — l'estetica è quella di uno strumento da banco, non di un'app di fotocamera:
   fondo nero assoluto perché il soggetto è l'immagine, un solo verde di fosforo per tutto ciò
   che la macchina ha CALCOLATO, e i numeri in monospaziato perché un numero che salta di
   larghezza mentre cambia si legge male. Nessuna libreria di componenti. */

:root {
  --bg: #07080a;
  --ink: #eef2f6;
  --dim: #8b95a3;
  --dimmer: #59616e;
  --line: rgba(255, 255, 255, .1);
  --line-2: rgba(255, 255, 255, .2);
  --glow: #00e5a0;
  --warn: #ffb347;
  --bad: #ff6b6b;
  --panel: rgba(12, 14, 18, .88);
  --sans: 'Archivo', ui-sans-serif, system-ui, sans-serif;
  --serif: 'Instrument Serif', Georgia, serif;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --dock-h: 74px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

/* Quasi ogni pannello qui dichiara un `display`, che per specificità batte quello di [hidden]:
   senza questa riga `el.hidden = true` non nasconde niente e la porta d'ingresso resta davanti
   a tutto, invisibilmente. */
[hidden] { display: none !important; }

html, body {
  margin: 0; height: 100%; overflow: hidden; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 14px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ---------- palco ---------- */

.stage { position: absolute; inset: 0; background: #000; overflow: hidden; }
#video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; }
#video.show { opacity: 1; }
#out { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }

/* il mirino: dice DOVE guardare, che in metà degli strumenti è tutta la differenza fra
   un numero giusto e uno inventato. */
.reticle {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(58vw, 300px); aspect-ratio: 1; pointer-events: none;
  border-radius: 14px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, .45);
}
.reticle::before, .reticle::after {
  content: ''; position: absolute; inset: 0; border-radius: 14px;
}
.reticle::before { border: 1px solid rgba(255, 255, 255, .3); }
.reticle::after {
  inset: -1px; border: 2px solid var(--glow); clip-path: polygon(
    0 0, 22% 0, 22% 2px, 2px 2px, 2px 22%, 0 22%,
    0 78%, 2px 78%, 2px calc(100% - 2px), 22% calc(100% - 2px), 22% 100%, 0 100%,
    100% 100%, 78% 100%, 78% calc(100% - 2px), calc(100% - 2px) calc(100% - 2px), calc(100% - 2px) 78%, 100% 78%,
    100% 22%, calc(100% - 2px) 22%, calc(100% - 2px) 2px, 78% 2px, 78% 0, 100% 0);
}
.reticle.wide { width: min(86vw, 560px); aspect-ratio: 16/10; }

/* ---------- porta d'ingresso ---------- */

.gate {
  position: absolute; inset: 0; z-index: 40; display: grid; place-items: center;
  background: radial-gradient(120% 90% at 50% 0%, #10151b 0%, #07080a 62%);
  padding: 24px;
}
.gate-in { max-width: 420px; text-align: center; }
.logo { display: grid; place-items: center; margin-bottom: 20px; }

/* la traccia papillare come marchio: disegnata con i box-shadow, zero immagini */
.ridges {
  width: 56px; height: 56px; border-radius: 50%; position: relative; display: block;
  background:
    repeating-radial-gradient(circle at 50% 62%, transparent 0 3px, var(--glow) 3px 4.4px);
  -webkit-mask-image: radial-gradient(circle at 50% 55%, #000 55%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 55%, #000 55%, transparent 78%);
  opacity: .95;
}
.ridges.sm { width: 19px; height: 19px; }

h1 { font-family: var(--serif); font-size: 46px; font-weight: 400; margin: 0 0 12px; letter-spacing: -.01em; }
.lede { font-size: 15px; color: var(--dim); margin: 0 0 14px; line-height: 1.6; }
.lede em { font-family: var(--serif); font-style: italic; font-size: 17px; color: var(--ink); }
.fine { font-size: 12px; color: var(--dimmer); margin: 0 0 24px; line-height: 1.55; }

.gate-btns { display: flex; flex-direction: column; gap: 9px; }
button { font: inherit; cursor: pointer; }
.primary {
  height: 48px; border-radius: 12px; border: none; background: var(--glow); color: #032118;
  font-weight: 700; font-size: 15px; letter-spacing: .005em;
}
.primary:hover { filter: brightness(1.07); }
.ghost {
  height: 42px; border-radius: 12px; background: none; color: var(--dim);
  border: 1px solid var(--line); font-size: 13.5px;
}
.ghost:hover { color: var(--ink); border-color: var(--line-2); }
.err { color: var(--bad); font-size: 13px; margin: 16px 0 0; line-height: 1.5; }

/* ---------- barra alta ---------- */

.top {
  position: absolute; top: 0; left: 0; right: 0; z-index: 25; height: 54px;
  display: flex; align-items: center; gap: 14px; padding: 0 14px;
  background: linear-gradient(180deg, rgba(7, 8, 10, .92), transparent);
  padding-top: env(safe-area-inset-top);
}
.brand { display: flex; align-items: center; gap: 8px; font-size: 14px; letter-spacing: -.01em; }
.mode-name {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--glow); margin-left: auto;
}
.top-btns { display: flex; gap: 7px; }
.icon {
  width: 34px; height: 34px; border-radius: 10px; background: rgba(255, 255, 255, .07);
  border: 1px solid var(--line); color: var(--ink); font-size: 15px; line-height: 1;
}
.icon:hover { background: rgba(255, 255, 255, .13); }

/* ---------- lettura ---------- */

.readout {
  position: absolute; left: 12px; right: 12px; top: 60px; z-index: 22;
  display: flex; flex-wrap: wrap; gap: 8px; pointer-events: none;
}
.cell {
  background: var(--panel); backdrop-filter: blur(13px);
  border: 1px solid var(--line); border-radius: 12px; padding: 9px 13px; min-width: 96px;
}
.cell.hero { border-color: rgba(0, 229, 160, .4); background: rgba(0, 40, 30, .72); }
.cell-l {
  font-family: var(--mono); font-size: 9px; letter-spacing: .13em; text-transform: uppercase;
  color: var(--dimmer); margin-bottom: 3px;
}
.cell.hero .cell-l { color: rgba(0, 229, 160, .75); }
.cell-v { font-family: var(--mono); font-size: 21px; font-weight: 700; letter-spacing: -.025em; line-height: 1.1; }
.cell.hero .cell-v { color: var(--glow); font-size: 27px; }
.cell-u { font-size: 11px; color: var(--dim); font-weight: 400; margin-left: 3px; }
.cell-n { font-size: 10.5px; color: var(--dimmer); margin-top: 2px; }
.cell.warn .cell-v { color: var(--warn); }
.cell.bad .cell-v { color: var(--bad); }

/* barra di riempimento per gli strumenti che devono ACCUMULARE prima di rispondere:
   senza, l'attesa sembra un blocco. */
.bar { height: 3px; border-radius: 2px; background: rgba(255, 255, 255, .12); margin-top: 7px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--glow); transition: width .2s linear; }

/* ---------- azione ---------- */

.action-wrap {
  position: absolute; left: 0; right: 0; bottom: calc(var(--dock-h) + 16px); z-index: 24;
  display: grid; place-items: center; padding: 0 16px;
}
.action {
  min-width: 190px; height: 50px; padding: 0 26px; border-radius: 25px; border: none;
  background: var(--glow); color: #032118; font-weight: 700; font-size: 15px;
  box-shadow: 0 8px 30px rgba(0, 229, 160, .28);
}
.action:hover { filter: brightness(1.07); }
.action.armed { background: #fff; color: #111; }
.action.busy { background: rgba(255, 255, 255, .16); color: var(--dim); box-shadow: none; }

/* ---------- dock degli strumenti ---------- */

.dock {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 26; height: var(--dock-h);
  display: flex; gap: 4px; overflow-x: auto; padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
  background: linear-gradient(0deg, rgba(7, 8, 10, .96) 40%, transparent);
  scrollbar-width: none;
}
.dock::-webkit-scrollbar { display: none; }
.tool {
  flex: none; width: 66px; border: none; background: none; color: var(--dimmer);
  display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 5px 2px;
  border-radius: 11px;
}
.tool:hover { color: var(--dim); background: rgba(255, 255, 255, .04); }
.tool.on { color: var(--glow); background: rgba(0, 229, 160, .1); }
.tool svg { width: 21px; height: 21px; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.tool span { font-size: 9.5px; letter-spacing: .01em; text-align: center; line-height: 1.15; }

/* ---------- foglio "come funziona" ---------- */

.sheet {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 35; max-height: 76vh; overflow-y: auto;
  background: #0c0e12; border-top: 1px solid var(--line-2); border-radius: 18px 18px 0 0;
  padding: 22px 22px calc(30px + env(safe-area-inset-bottom));
}
.close {
  position: absolute; top: 13px; right: 15px; width: 30px; height: 30px; border-radius: 9px;
  background: none; border: 1px solid var(--line); color: var(--dim); font-size: 18px;
}
.sheet h2 { font-family: var(--serif); font-size: 26px; font-weight: 400; margin: 0 0 3px; padding-right: 34px; }
.sheet .kick {
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--glow); margin-bottom: 7px;
}
.sheet h3 {
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--dimmer); margin: 20px 0 7px; font-weight: 400;
}
.sheet p { margin: 0 0 10px; color: var(--dim); font-size: 13.5px; line-height: 1.6; }
.sheet p b { color: var(--ink); font-weight: 600; }
.sheet ol, .sheet ul { margin: 0; padding-left: 18px; color: var(--dim); font-size: 13.5px; line-height: 1.65; }
.sheet li { margin-bottom: 5px; }
.sheet li b { color: var(--ink); font-weight: 600; }
.sheet code { font-family: var(--mono); font-size: 12px; color: var(--glow); }
.limits { border-left: 2px solid var(--warn); padding-left: 12px; margin-top: 6px; }
.limits p { color: var(--dimmer); font-size: 12.5px; margin-bottom: 6px; }
.max { max-width: 620px; margin-inline: auto; }

/* ---------- toast ---------- */

.toast {
  position: absolute; left: 50%; transform: translateX(-50%); bottom: calc(var(--dock-h) + 78px);
  z-index: 30; background: rgba(12, 14, 18, .96); border: 1px solid var(--line-2);
  border-radius: 11px; padding: 9px 16px; font-size: 13px; max-width: 84vw; text-align: center;
}
.toast.err { border-color: rgba(255, 107, 107, .55); color: #ffbdbd; }

@media (min-width: 900px) {
  .readout { left: 16px; right: auto; max-width: 420px; }
  .sheet { left: 50%; right: auto; transform: translateX(-50%); width: 680px; border-radius: 18px 18px 0 0; }
}