:root {
  --banco: #E7E6E3;
  --carta: #F6F7F8;
  --bianco: #FFFFFF;
  --inchiostro: #1A1D21;
  --tenue: #5D646E;
  --linea: #CCD1D6;
  --scocca: #D99A12;
  --scocca-luce: #F2BE3A;
  --tasto: #1E2024;
  --scelta: #FFFFFF;
  --azione: #1F5FD6;
  --azione-scura: #174AA8;
  --attenzione: #B3261E;
  --ok: #1E7A43;
  --arcobaleno: linear-gradient(180deg, #ff5a36, #ffb000, #3ddc84, #20c9e0, #3d7bff, #9b5cff);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--banco); color: var(--inchiostro); font: 15px/1.45 'Instrument Sans', system-ui, sans-serif; min-height: 100vh; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .5; }
:focus-visible { outline: 3px solid var(--azione); outline-offset: 2px; }
[hidden] { display: none !important; }

header { display: flex; align-items: center; gap: 12px; padding: 14px 24px; flex-wrap: wrap; }
header h1 { font-size: 20px; font-weight: 700; margin: 0 auto 0 0; letter-spacing: -0.01em; }
header h1 small { font-weight: 500; color: var(--tenue); font-size: 14px; margin-left: 6px; }
.stato { display: flex; align-items: center; gap: 8px; color: var(--tenue); font-size: 14px; }
.stato i { width: 9px; height: 9px; border-radius: 50%; background: #A3AAB3; }
.stato[data-collegata] i { background: #2EAD5B; }
.bottone { border: 1px solid var(--linea); background: var(--carta); border-radius: 10px; padding: 9px 16px; font-weight: 600; }
a.bottone { color: inherit; text-decoration: none; display: inline-block; }
.bottone:hover:not(:disabled) { background: var(--bianco); }
.bottone.primo { background: var(--azione); border-color: var(--azione); color: #fff; }
.bottone.primo:hover:not(:disabled) { background: var(--azione-scura); }
.bottone.piccolo { font-size: 13px; padding: 6px 11px; border-radius: 8px; }
.bottone.pericolo { color: var(--attenzione); }
.menu { position: relative; }
.menu-voci { position: absolute; right: 0; top: calc(100% + 6px); background: var(--bianco); border: 1px solid var(--linea); border-radius: 12px; padding: 6px; min-width: 240px; box-shadow: 0 12px 30px -10px rgba(0,0,0,.25); z-index: 5; display: grid; }
.menu-voci button { border: 0; background: none; text-align: left; padding: 9px 12px; border-radius: 8px; }
.menu-voci button:hover { background: var(--carta); }

/* ---------- benvenuto ---------- */
.benvenuto { max-width: 620px; margin: 6vh auto; background: var(--carta); border-radius: 18px; padding: 36px; display: grid; gap: 18px; }
.benvenuto h2 { margin: 0; font-size: 26px; letter-spacing: -0.01em; }
.benvenuto p { margin: 0; color: var(--tenue); }
.benvenuto .errore { color: var(--attenzione); font-weight: 600; }
.benvenuto details { border-top: 1px solid var(--linea); padding-top: 14px; }
.benvenuto summary { cursor: pointer; font-weight: 600; }
pre { background: #1A1D21; color: #E8ECF0; padding: 12px 14px; border-radius: 10px; overflow-x: auto; font-size: 12.5px; white-space: pre-wrap; word-break: break-all; }

/* ---------- schede dei layer ---------- */
.layer { display: flex; gap: 6px; padding: 0 24px; flex-wrap: wrap; align-items: flex-end; }
.layer button { border: 0; background: transparent; padding: 10px 18px 12px; border-radius: 12px 12px 0 0; font-weight: 600; color: var(--tenue); display: flex; gap: 10px; align-items: center; }
.layer button:hover { color: var(--inchiostro); }
.layer button[aria-selected="true"] { background: var(--carta); color: var(--inchiostro); }
.layer .pallini { display: flex; gap: 2px; }
.layer .pallini span { width: 6px; height: 6px; border-radius: 2px; background: #C7CCD2; }
.layer .nuovo { color: var(--azione); }
.layer .imposta { margin-left: auto; }
.layer .modificato::after { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--azione); }

main { display: grid; grid-template-columns: minmax(560px, 1fr) 390px; background: var(--carta); margin: 0 24px 24px; border-radius: 0 16px 16px 16px; min-height: calc(100vh - 140px); }
main.impostazioni { grid-template-columns: 1fr; border-radius: 16px; }
.banco { display: grid; place-items: center; padding: 40px 24px; }

/* ---------- la pulsantiera ---------- */
.kb { --u: 88px; display: grid; grid-template-columns: repeat(4, var(--u)) 26px 220px; grid-template-rows: repeat(4, var(--u)); gap: 12px; padding: 28px; background: linear-gradient(160deg, var(--scocca-luce), var(--scocca) 40%); border-radius: 22px; box-shadow: 0 1px 0 rgba(255,255,255,.45) inset, 0 -2px 0 rgba(120,80,0,.35) inset, 0 30px 50px -20px rgba(90,60,0,.45); }
.tasto { position: relative; border: 0; border-radius: 12px; background: var(--tasto); color: #EEF1F4; font-weight: 600; font-size: 12px; line-height: 1.15; padding: 8px; display: flex; align-items: flex-end; text-align: left; box-shadow: 0 4px 0 #0E0F11; transition: transform .08s; overflow: hidden; }
.tasto::before { content: ''; position: absolute; inset: 0; border-radius: 12px; box-shadow: 0 0 22px 2px var(--luce, transparent) inset; opacity: .95; pointer-events: none; }
@property --h { syntax: '<number>'; inherits: true; initial-value: 0; }
.tasto[data-arcobaleno] { --luce: hsl(var(--h) 95% 60% / .75); background: color-mix(in srgb, hsl(var(--h) 90% 55%) 20%, #1E2024); animation: tinta 5s linear infinite; animation-delay: calc(var(--riga, 0) * -0.5s); }
@keyframes tinta { to { --h: 360; } }
.tasto[data-spento] { color: #9AA1AA; }
.tasto[data-vuoto] { color: #6E757E; font-weight: 400; }
.tasto[aria-pressed="true"] { outline: 3px solid var(--scelta); outline-offset: 3px; }
.tasto:active { transform: translateY(2px); }
.tasto .delicato { position: absolute; top: 7px; right: 8px; font-size: 11px; opacity: .85; }
.tasto span { position: relative; }

.lato { grid-column: 6; grid-row: 1 / span 4; display: grid; grid-template-rows: auto 1fr auto; gap: 16px; justify-items: center; }
.piccole { display: flex; gap: 26px; }
.manopola { border: 0; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #59606B, #24282E 70%); box-shadow: 0 3px 0 #15181C, 0 0 0 4px #1A1C20, 0 0 0 5px rgba(120,80,0,.4); position: relative; }
.manopola::after { content: ''; position: absolute; left: 50%; top: 8%; width: 3px; height: 22%; margin-left: -1.5px; border-radius: 2px; background: #C9CFD6; }
.manopola.piccola { width: 58px; height: 58px; }
.manopola.grande { width: 132px; height: 132px; }
.manopola[aria-pressed="true"] { outline: 3px solid var(--scelta); outline-offset: 5px; }
.oled { align-self: center; padding: 6px; background: #121418; border-radius: 6px; box-shadow: 0 0 0 2px #0B0C0E; }
.oled canvas { display: block; width: 192px; height: 48px; image-rendering: pixelated; filter: drop-shadow(0 0 3px rgba(120,200,255,.35)); }

/* ---------- pannello ---------- */
aside { border-left: 1px solid var(--linea); padding: 26px; display: flex; flex-direction: column; gap: 20px; }
aside h2 { margin: 0; font-size: 22px; letter-spacing: -0.01em; }
aside h2 small { display: block; font-size: 13px; font-weight: 500; color: var(--tenue); margin-top: 2px; }
.campo { display: grid; gap: 7px; }
.campo > span { font-weight: 600; font-size: 13px; color: var(--tenue); }
.campo .nota, .foglio > .nota, aside > .nota { font-size: 13px; color: var(--tenue); margin: 0; }
select, input[type=text] { border: 1px solid var(--linea); border-radius: 10px; background: var(--bianco); padding: 10px 12px; width: 100%; }
input[type=text][aria-invalid="true"] { border-color: var(--attenzione); }
.colori { display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px; }
.colori button { aspect-ratio: 1; border-radius: 50%; border: 2px solid transparent; box-shadow: 0 0 0 1px rgba(0,0,0,.12) inset; padding: 0; }
.colori button[aria-pressed="true"] { border-color: var(--inchiostro); box-shadow: 0 0 0 2px var(--bianco) inset; }
.colori .arco { background: conic-gradient(#ff5a36, #ffb000, #3ddc84, #20c9e0, #3d7bff, #9b5cff, #ff5a36); }
.colori .nero { background: #22252a; }
.riga-azioni { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
input[type=color] { width: 40px; height: 34px; border: 1px solid var(--linea); border-radius: 8px; padding: 2px; background: var(--bianco); }
.giro { display: grid; gap: 10px; }
.giro label { display: grid; grid-template-columns: 96px 1fr; align-items: center; gap: 10px; font-size: 14px; }
.spunta { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; }
.spunta input { margin-top: 3px; width: 17px; height: 17px; }
.spunta small { display: block; color: var(--tenue); }
.spazio { flex: 1; }
.nota-layer { border-top: 1px solid var(--linea); padding-top: 18px; display: grid; gap: 14px; }
.scelte { display: flex; gap: 6px; flex-wrap: wrap; }
.scelte button { border: 1px solid var(--linea); background: var(--bianco); border-radius: 999px; padding: 6px 13px; font-size: 13px; font-weight: 600; }
.scelte button[aria-pressed="true"] { background: var(--inchiostro); color: #fff; border-color: var(--inchiostro); }
.avviso { background: #FDECEA; color: #7A1A14; border-radius: 10px; padding: 10px 12px; font-size: 14px; }

/* ---------- impostazioni ---------- */
.fogli { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; padding: 30px; }
.foglio { display: grid; gap: 16px; align-content: start; }
.foglio h3 { margin: 0; font-size: 17px; }
input[type=range] { width: 100%; accent-color: var(--azione); }
.valore { font-variant-numeric: tabular-nums; color: var(--tenue); font-size: 13px; }

/* ---------- avanzamento e avvisi ---------- */
.barra { position: fixed; inset: auto 0 0 0; padding: 14px 24px; background: var(--inchiostro); color: #fff; display: flex; align-items: center; gap: 16px; z-index: 10; }
.barra progress { flex: 1; height: 8px; accent-color: #8fd8ff; }
.barra.ok { background: var(--ok); }
.barra.errore { background: var(--attenzione); }
.barra .bottone { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }

@media (max-width: 1080px) {
  main { grid-template-columns: 1fr; }
  aside { border-left: 0; border-top: 1px solid var(--linea); }
}
@media (max-width: 720px) {
  header, .layer { padding-left: 16px; padding-right: 16px; }
  main { margin: 0 16px 16px; }
  .kb { --u: 52px; gap: 8px; padding: 16px; grid-template-columns: repeat(4, var(--u)) 8px 120px; }
  .tasto { font-size: 9.5px; padding: 5px; }
  .oled canvas { width: 112px; height: 28px; }
  .manopola.grande { width: 84px; height: 84px; }
  .manopola.piccola { width: 40px; height: 40px; }
  .piccole { gap: 12px; }
}
@media (prefers-reduced-motion: reduce) { .tasto { transition: none; } .tasto[data-arcobaleno] { animation: none; } }