/* Cunei Smart — strumento di bordo.
 *
 * La tavolozza non e' decorativa, viene dagli oggetti veri di questo lavoro:
 *   --vial  il verde-giallo del liquido dentro la fiala di una livella a bolla
 *   --ramp  l'arancione dei cunei di livellamento in plastica
 *   --ink   il grigio dell'asfalto di una piazzola
 *
 * Nessun font esterno: l'app deve aprirsi in piazzola senza campo, e una richiesta
 * a un CDN che non parte lascia la pagina senza caratteri. Si usano gli stack di
 * sistema, scelti per ruolo.
 */

:root {
  --ink-950: #101215;
  --ink-900: #191c21;
  --ink-850: #1f242b;
  --ink-800: #2a3038;
  --haze:    #8b93a0;
  --chalk:   #eef1f5;
  --vial:    #c8f04a;
  --ramp:    #ff8a1f;
  --alarm:   #ff5a5a;

  --ground:  var(--ink-950);
  --panel:   var(--ink-900);
  --raised:  var(--ink-850);
  --line:    var(--ink-800);
  --text:    var(--chalk);
  --text-dim: var(--haze);
  --accent:  var(--vial);
  --action:  var(--ramp);
  --on-accent: #101215;

  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  /* I numeri cambiano dieci volte al secondo: senza cifre a larghezza fissa
     la riga "balla" a ogni decimale e diventa illeggibile in movimento. */
  --font-num: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;

  --pad: clamp(16px, 4.5vw, 24px);
}

/* In pieno sole il tema scuro sparisce: il chiaro non e' un vezzo, e' leggibilita'.
   Si segue l'impostazione del telefono, che l'utente cambia gia' da solo. */
@media (prefers-color-scheme: light) {
  :root {
    --ground: #eceef1;
    --panel:  #ffffff;
    --raised: #f5f6f8;
    --line:   #d3d8de;
    --text:   #101215;
    --text-dim: #5c6472;
    --accent: #4f7a00;
    --action: #c25400;
    --on-accent: #ffffff;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 17px;
  line-height: 1.45;
  /* Notch e barra gesti: senza questo, il pulsante in fondo finisce sotto la barra. */
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
           env(safe-area-inset-bottom) env(safe-area-inset-left);
  -webkit-tap-highlight-color: transparent;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--pad) var(--pad) calc(var(--pad) * 3);
}

/* ---- Testata ------------------------------------------------------------- */

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-block: 6px 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}

.masthead h1 {
  margin: 0;
  font-size: 19px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.masthead h1 span { color: var(--accent); }

.masthead a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  font-weight: 550;
  padding: 8px 2px;
}
.masthead a:hover, .masthead a:focus-visible { color: var(--text); }

/* Etichette incise, come sulla scala di uno strumento. */
.tag {
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* ---- Blocchi ------------------------------------------------------------- */

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--pad);
  margin-bottom: 16px;
}

.card > .tag { display: block; margin-bottom: 4px; }

.card h2 {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0 0 16px;
  color: var(--text-dim);
  font-size: 15px;
}
.card p:last-child { margin-bottom: 0; }

.card p strong { color: var(--text); font-weight: 600; }

/* ---- Campi --------------------------------------------------------------- */

.field { margin-bottom: 18px; }
.field:last-of-type { margin-bottom: 0; }

.field label {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 7px;
}

.field .hint {
  display: block;
  font-size: 13.5px;
  font-weight: 400;
  color: var(--text-dim);
  margin-top: 3px;
}

input[type="number"], input[type="text"], select {
  width: 100%;
  padding: 13px 14px;
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: var(--text);
  /* 17px minimo, altrimenti Safari su iOS zooma la pagina al focus. */
  font: 17px/1.2 var(--font-num);
  font-variant-numeric: tabular-nums;
}

select { font-family: var(--font-ui); }

input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.unit { position: relative; }
.unit input { padding-right: 46px; }
.unit::after {
  content: attr(data-unit);
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  font: 600 14px var(--font-ui);
  pointer-events: none;
}

/* ---- Pulsanti ------------------------------------------------------------ */

button {
  font: 600 17px var(--font-ui);
  border-radius: var(--r-md);
  border: 1px solid transparent;
  /* 52px: si preme con il pollice, in piedi, con una mano sola. */
  min-height: 52px;
  padding: 14px 20px;
  cursor: pointer;
  width: 100%;
  transition: transform .12s ease, opacity .12s ease;
}
button:active { transform: scale(.985); }
button:disabled { opacity: .45; cursor: default; }

.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-action  { background: var(--action); color: var(--on-accent); }
.btn-quiet {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn-danger { background: transparent; color: var(--alarm); border-color: var(--alarm); }

.btn-row { display: grid; gap: 10px; margin-top: 18px; }
.btn-row.two { grid-template-columns: 1fr 1fr; }

/* ---- Gradini dei cunei --------------------------------------------------- */

.steps { display: grid; gap: 10px; }

.step-line {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
}

.step-no {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--raised);
  border: 1px solid var(--line);
  font: 650 15px var(--font-num);
  color: var(--action);
}

.step-line button {
  width: auto;
  min-height: 44px;
  padding: 10px 14px;
}

/* ---- Messaggi ------------------------------------------------------------ */

.note {
  border-radius: var(--r-md);
  padding: 13px 15px;
  font-size: 15px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  background: var(--raised);
}
.note.good  { border-color: var(--accent); color: var(--accent); }
.note.warn  { border-color: var(--action); color: var(--action); }
.note.bad   { border-color: var(--alarm);  color: var(--alarm); }
.note[hidden] { display: none; }

/* ---- Lettura sensori nel setup ------------------------------------------- */

.readout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.readout .cell {
  background: var(--raised);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 14px;
  text-align: center;
}

.readout .value {
  display: block;
  font: 650 30px/1.1 var(--font-num);
  font-variant-numeric: tabular-nums;
  margin-top: 6px;
  letter-spacing: -0.02em;
}

/* Pallino di stabilita': il numero va letto solo quando il telefono e' fermo. */
.steady {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-dim);
}
.steady::before {
  content: "";
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--action);
  transition: background .2s ease;
}
.steady[data-steady="true"]::before { background: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ---- La livella a bolla --------------------------------------------------
 * L'elemento centrale dell'app: la stessa livella circolare che sta sul
 * cruscotto, ma viva. Si legge in un colpo d'occhio, da lontano, di sfuggita.
 */

.vial-wrap {
  display: grid;
  place-items: center;
  padding: 8px 0 20px;
}

.vial { width: min(78vw, 320px); height: auto; display: block; }

.vial .body { fill: var(--panel); stroke: var(--line); stroke-width: 2; }
.vial .grad { fill: none; stroke: var(--line); stroke-width: 1.5; }
.vial .grad-label { fill: var(--text-dim); font: 600 7px var(--font-num); }
.vial .cross { stroke: var(--line); stroke-width: 1.5; stroke-linecap: round; }
.vial .nose { fill: var(--text-dim); font: 650 8px var(--font-ui); letter-spacing: .14em; }

.vial .bubble {
  fill: var(--action);
  transition: cx .1s linear, cy .1s linear, fill .3s ease;
}
.vial .bubble.centred { fill: var(--accent); }
.vial .glint { fill: #fff; opacity: .28; transition: cx .1s linear, cy .1s linear; }

@media (prefers-reduced-motion: reduce) {
  .vial .bubble, .vial .glint { transition: none; }
}

/* ---- Lettura grande ------------------------------------------------------ */

.angles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.angle {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 16px 14px;
  text-align: center;
}

.angle .value {
  display: block;
  font: 650 clamp(30px, 9vw, 40px)/1 var(--font-num);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  margin-top: 8px;
}
.angle .value.centred { color: var(--accent); }
.angle .side { display: block; font-size: 13px; color: var(--text-dim); margin-top: 8px; }

/* ---- Il verdetto --------------------------------------------------------- */

.verdict { margin-bottom: 16px; }

.verdict-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.verdict-head h2 { margin: 0; font-size: 20px; font-weight: 650; }

.wheels { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.wheel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 16px 14px;
  text-align: center;
}
.wheel.acting { border-color: var(--action); }

.wheel .step {
  display: block;
  font: 650 clamp(34px, 11vw, 48px)/1 var(--font-num);
  letter-spacing: -0.03em;
  color: var(--action);
  margin: 10px 0 2px;
}
.wheel.ground .step { color: var(--text-dim); }
.wheel .cm { display: block; font-size: 14px; color: var(--text-dim); }
.wheel .ramp { width: 100%; height: auto; margin-top: 12px; }
.wheel .ramp .tread { fill: var(--raised); stroke: var(--line); stroke-width: 1; }
.wheel .ramp .tread.on { fill: var(--action); stroke: var(--action); }

/* ---- Verifica ------------------------------------------------------------ */

.compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.compare:last-of-type { border-bottom: 0; }
.compare .who { font-size: 14px; color: var(--text-dim); }
.compare .num {
  font: 650 20px var(--font-num);
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.compare .arrow { color: var(--text-dim); }

[hidden] { display: none !important; }