:root{
  --ink:#0E1116;
  --ink-2:#151A21;
  --panel:#171C23;
  --brass:#C9A24B;
  --brass-bright:#EBCD86;
  --brass-deep:#8A6D2E;
  --patina:#52B597;
  --parch:#ECE3CE;
  --muted:#8B8472;
  --line:rgba(201,162,75,.16);
  --line-strong:rgba(201,162,75,.34);
  --shadow:0 18px 50px rgba(0,0,0,.5);
  --rad:16px;
  --accent:var(--brass);            /* cambia in modalità decifra */
  --accent-bright:var(--brass-bright);
}

*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  background:
    radial-gradient(1100px 700px at 50% -8%, #1b212a 0%, rgba(27,33,42,0) 60%),
    radial-gradient(900px 900px at 92% 110%, rgba(82,181,151,.07) 0%, rgba(0,0,0,0) 55%),
    var(--ink);
  color:var(--parch);
  font-family:"Spectral", Georgia, "Times New Roman", serif;
  -webkit-font-smoothing:antialiased;
  min-height:100svh;
  display:flex;flex-direction:column;
  padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.grain{position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}

/* ---------- TOPBAR ---------- */
.topbar{
  position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px clamp(16px,4vw,40px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:baseline;gap:10px}
.brand-mark{color:var(--brass);display:inline-flex;align-self:center;filter:drop-shadow(0 0 8px rgba(201,162,75,.25))}
.brand-text{font-family:"Cinzel",serif;font-weight:700;letter-spacing:.22em;font-size:1.05rem;color:var(--parch)}
.brand-sub{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}
@media(max-width:540px){.brand-sub{display:none}}

.mode-switch{position:relative;display:flex;border:1px solid var(--line-strong);border-radius:999px;padding:4px;background:rgba(0,0,0,.25)}
.mode-btn{
  position:relative;z-index:2;border:0;background:transparent;cursor:pointer;
  font-family:"Cinzel",serif;font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);padding:8px 16px;border-radius:999px;transition:color .25s;
}
.mode-btn.is-active{color:var(--ink)}
.mode-glow{position:absolute;top:4px;left:4px;height:calc(100% - 8px);width:calc(50% - 4px);
  border-radius:999px;background:linear-gradient(180deg,var(--accent-bright),var(--accent));
  box-shadow:0 2px 12px rgba(201,162,75,.4);transition:transform .35s cubic-bezier(.34,1.4,.5,1),background .35s;z-index:1}
.mode-switch.dec .mode-glow{transform:translateX(100%)}

/* ---------- STAGE ---------- */
.stage{
  position:relative;z-index:1;flex:1;
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:clamp(20px,3vw,48px);
  align-items:start;
  padding:clamp(20px,3.4vw,44px) clamp(16px,4vw,40px);
  max-width:1180px;width:100%;margin:0 auto;
}
@media(max-width:880px){.stage{grid-template-columns:1fr;gap:28px}}

/* ---------- DISCO ---------- */
.disc-panel{display:flex;flex-direction:column;align-items:center;gap:18px}

.alignment{
  display:flex;align-items:center;gap:14px;
  font-family:"Cinzel",serif;font-size:1.5rem;letter-spacing:.06em;
  padding:8px 22px;border:1px solid var(--line);border-radius:999px;background:rgba(0,0,0,.22);
}
.al-from{color:var(--parch)}
.al-arrow{color:var(--muted);font-size:1.1rem}
.al-to{color:var(--accent-bright);text-shadow:0 0 16px rgba(201,162,75,.45);transition:color .35s}

.disc-wrap{position:relative;width:min(74vw,440px);aspect-ratio:1}
@media(max-width:880px){.disc-wrap{width:min(82vw,420px)}}
.disc{width:100%;height:100%;display:block;overflow:visible}

.ring text{
  font-family:"Cinzel",serif;font-weight:600;font-size:21px;
  fill:var(--parch);text-anchor:middle;dominant-baseline:central;
  transition:fill .25s, opacity .25s;
}
.ring-inner text{fill:#d7b766}
.ring text.lit{fill:var(--ink);font-weight:700}
.ring-outer text.lit{paint-order:stroke}
text.lit-bg{fill:var(--accent-bright)}

.ring-rotor{transform-box:fill-box;transform-origin:center;
  transition:transform .65s cubic-bezier(.22,1.2,.36,1)}
.beam{transition:transform .28s cubic-bezier(.3,1.3,.5,1);transform-box:view-box;transform-origin:300px 300px}

.index-mark{position:absolute;top:-4px;left:50%;transform:translateX(-50%);
  width:0;height:0;border-left:11px solid transparent;border-right:11px solid transparent;
  border-top:16px solid var(--accent-bright);filter:drop-shadow(0 2px 4px rgba(0,0,0,.6));transition:border-top-color .35s}

/* chiave */
.key-control{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:center;
  width:100%;max-width:440px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--rad);
  background:linear-gradient(180deg,rgba(255,255,255,.02),rgba(0,0,0,.15))}
.key-label{font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.step{width:38px;height:38px;border-radius:10px;border:1px solid var(--line-strong);
  background:rgba(0,0,0,.25);color:var(--accent-bright);font-size:1.4rem;line-height:1;cursor:pointer;
  display:grid;place-items:center;transition:.2s}
.step:hover{background:var(--accent);color:var(--ink);border-color:var(--accent)}
.key-readout{min-width:54px;text-align:center;font-family:"JetBrains Mono",monospace;font-weight:700;
  font-size:1.5rem;color:var(--accent-bright)}
.key-slider{flex:1 1 140px;min-width:120px;-webkit-appearance:none;appearance:none;height:4px;border-radius:4px;
  background:linear-gradient(90deg,var(--accent),var(--brass-deep));outline:none}
.key-slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;
  background:radial-gradient(circle at 35% 30%,var(--brass-bright),var(--brass-deep));
  border:2px solid var(--ink);box-shadow:0 0 10px rgba(201,162,75,.5);cursor:pointer}
.key-slider::-moz-range-thumb{width:20px;height:20px;border-radius:50%;border:2px solid var(--ink);
  background:var(--brass);box-shadow:0 0 10px rgba(201,162,75,.5);cursor:pointer}
.rot13{border:1px solid var(--line-strong);background:transparent;color:var(--muted);
  font-family:"JetBrains Mono",monospace;font-size:.74rem;letter-spacing:.08em;padding:8px 12px;border-radius:10px;cursor:pointer;transition:.2s}
.rot13:hover{color:var(--accent-bright);border-color:var(--accent)}

/* ---------- MESSAGGIO ---------- */
.msg-panel{display:flex;flex-direction:column;gap:16px;align-self:stretch}
.field{display:flex;flex-direction:column;gap:8px}
.field-head{display:flex;align-items:center;justify-content:space-between}
.field-head label{font-family:"Cinzel",serif;font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.field.out .field-head label{color:var(--accent)}
textarea{
  width:100%;resize:vertical;min-height:96px;
  background:var(--ink-2);border:1px solid var(--line);border-radius:var(--rad);
  color:var(--parch);padding:14px 16px;font-family:"Spectral",serif;font-size:1.08rem;line-height:1.5;
  transition:border-color .2s, box-shadow .2s;
}
textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(201,162,75,.14)}
#output{font-family:"JetBrains Mono",monospace;font-size:1rem;letter-spacing:.04em;color:var(--accent-bright);
  background:linear-gradient(180deg,rgba(82,181,151,0),rgba(0,0,0,.18)),var(--ink-2)}

.ghost{background:transparent;border:0;color:var(--muted);cursor:pointer;font-family:"Spectral",serif;
  font-size:.85rem;padding:4px 6px;border-radius:8px;transition:.2s}
.ghost:hover{color:var(--accent-bright)}

.transmit-row{display:flex;gap:12px;flex-wrap:wrap}
.transmit{flex:1 1 auto;display:inline-flex;align-items:center;justify-content:center;gap:10px;
  border:0;cursor:pointer;border-radius:var(--rad);padding:13px 18px;
  font-family:"Cinzel",serif;font-size:.84rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);
  background:linear-gradient(180deg,var(--accent-bright),var(--accent));
  box-shadow:0 6px 20px rgba(201,162,75,.28);transition:transform .15s, box-shadow .2s, filter .2s}
.transmit:hover{filter:brightness(1.05);box-shadow:0 8px 26px rgba(201,162,75,.4)}
.transmit:active{transform:translateY(1px)}
.transmit.playing{filter:grayscale(.2) brightness(.92)}
.t-ico{font-size:.7rem}
.swap{border:1px solid var(--line-strong);background:rgba(0,0,0,.2);color:var(--parch);cursor:pointer;
  border-radius:var(--rad);padding:13px 16px;font-family:"Spectral",serif;font-size:.92rem;transition:.2s}
.swap:hover{border-color:var(--accent);color:var(--accent-bright)}

/* crack */
.crack{border:1px solid var(--line);border-radius:var(--rad);background:rgba(0,0,0,.16);padding:4px 16px}
.crack summary{cursor:pointer;padding:12px 2px;font-size:.92rem;color:var(--muted);list-style:none}
.crack summary span{color:var(--accent-bright)}
.crack summary::-webkit-details-marker{display:none}
.crack[open] summary{border-bottom:1px solid var(--line);margin-bottom:6px}
.crack-list{display:grid;gap:2px;padding:8px 0 12px;max-height:280px;overflow:auto;
  font-family:"JetBrains Mono",monospace;font-size:.82rem}
.crack-row{display:grid;grid-template-columns:auto 1fr;gap:12px;padding:5px 8px;border-radius:8px;cursor:pointer;transition:background .15s}
.crack-row:hover{background:rgba(201,162,75,.08)}
.crack-row .k{color:var(--accent);white-space:nowrap}
.crack-row .v{color:var(--parch);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.crack-row.cur{background:rgba(201,162,75,.14)}

/* ---------- FOOT ---------- */
.foot{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding:16px clamp(16px,4vw,40px);color:var(--muted);font-size:.84rem;max-width:1180px;margin:0 auto;width:100%}
.foot p{margin:0;max-width:62ch;line-height:1.5}
.install{border:1px solid var(--accent);background:transparent;color:var(--accent-bright);cursor:pointer;
  font-family:"Cinzel",serif;font-size:.74rem;letter-spacing:.1em;text-transform:uppercase;padding:9px 16px;border-radius:10px;transition:.2s}
.install:hover{background:var(--accent);color:var(--ink)}

/* ---------- TOAST ---------- */
.toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);z-index:30;
  background:var(--accent);color:var(--ink);font-family:"Cinzel",serif;font-size:.78rem;letter-spacing:.06em;
  padding:11px 20px;border-radius:999px;box-shadow:0 10px 30px rgba(0,0,0,.4);
  opacity:0;pointer-events:none;transition:opacity .3s, transform .3s}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- modalità DECIFRA (patina verde) ---------- */
body.decrypt{--accent:var(--patina);--accent-bright:#7fe0c4}

/* ---------- accessibilità ---------- */
:focus-visible{outline:2px solid var(--accent-bright);outline-offset:2px;border-radius:4px}
@media(prefers-reduced-motion:reduce){
  .ring-rotor,.beam,.mode-glow{transition:none}
  *{scroll-behavior:auto}
}