@import url("https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,500;12..96,700;12..96,800&family=IBM+Plex+Sans:wght@400;500;600&display=swap");

:root {
  --night: #0b1030;
  --night-2: #0f1640;
  --surface: #171f4f;
  --surface-2: #1f2963;
  --ink: #edf0ff;
  --muted: #8c97c9;
  --hairline: rgba(140, 151, 201, 0.22);
  --focus: #7de3ff;

  --display: "Bricolage Grotesque", "Trebuchet MS", system-ui, sans-serif;
  --text: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--night);
  color: var(--ink);
  font-family: var(--text);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100dvh;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ========================================================================
   SCHERMO GRANDE
   Mobile first: una colonna, tutto in flusso normale. Dai 820x520 in su
   i pannelli diventano sovrapposizioni negli angoli e il grafico va a
   tutto schermo. Nessuna posizione calcolata a mano: comandi e legenda
   stanno nello stesso blocco e si impilano da soli.
   ======================================================================== */

.stage {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px 14px calc(14px + env(safe-area-inset-bottom));
  background:
    radial-gradient(120% 90% at 20% 0%, #141c4d 0%, transparent 55%),
    radial-gradient(90% 80% at 90% 100%, #12184a 0%, transparent 60%),
    var(--night);
}

.plot-wrap {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  margin: 0 -14px;
}

#plot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}

#plot.dragging {
  cursor: grabbing;
}

.panel {
  flex: none;
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.stage-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(22px, 6vw, 32px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0;
  max-width: 11ch;
}

.stage-sub {
  display: none;
}

.count {
  display: flex;
  align-items: baseline;
  gap: 7px;
  flex: none;
}

.count-value {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(28px, 7.5vw, 40px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.count-label {
  font-size: 12px;
  line-height: 1.15;
  color: var(--muted);
}

.panel-side {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.switch {
  display: inline-flex;
  flex: none;
  padding: 3px;
  border-radius: 999px;
  background: rgba(23, 31, 79, 0.9);
  border: 1px solid var(--hairline);
}

.switch-btn {
  appearance: none;
  border: none;
  background: none;
  font: inherit;
  font-family: var(--display);
  font-weight: 700;
  font-size: 15px;
  color: var(--muted);
  padding: 8px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}

.switch-btn.is-on {
  background: var(--focus);
  color: #0b1030;
}

.mode-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.35;
  color: var(--muted);
}

.ghost {
  appearance: none;
  font: inherit;
  font-size: 13px;
  color: var(--ink);
  background: rgba(11, 16, 48, 0.86);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 8px 15px;
  cursor: pointer;
}

.reset {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 3;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

.legend-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}

.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: none;
}

.legend-count {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.panel-join {
  display: flex;
  align-items: stretch;
  gap: 10px;
}

.qr-card {
  flex: none;
  background: var(--ink);
  border-radius: 12px;
  padding: 8px;
  display: grid;
  place-items: center;
}

.qr-card svg {
  width: 62px;
  height: auto;
  display: block;
}

.qr-caption {
  display: none;
}

.join {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-family: var(--display);
  font-weight: 700;
  font-size: 17px;
  color: #0b1030;
  background: var(--focus);
  border-radius: 12px;
  padding: 15px;
}

/* ---- proiettore: serve larghezza E altezza, altrimenti si accavalla ---- */

@media (min-width: 820px) and (min-height: 520px) {
  .stage {
    display: block;
    padding: 0;
  }

  .plot-wrap {
    position: absolute;
    inset: 0;
    margin: 0;
  }

  .panel {
    position: absolute;
    z-index: 2;
  }

  .panel-head {
    top: clamp(18px, 2.6vh, 44px);
    left: clamp(20px, 2.4vw, 52px);
    right: clamp(20px, 2.4vw, 52px);
    pointer-events: none;
  }

  .stage-title {
    font-size: clamp(30px, 3.2vw, 58px);
    line-height: 0.98;
    max-width: 14ch;
  }

  .stage-sub {
    display: block;
    margin: 0.55em 0 0;
    font-size: clamp(13px, 1vw, 19px);
    line-height: 1.45;
    color: var(--muted);
    max-width: 36ch;
  }

  .count {
    display: block;
    text-align: right;
  }

  .count-value {
    display: block;
    font-size: clamp(42px, 5vw, 96px);
  }

  .count-label {
    font-size: clamp(13px, 1vw, 18px);
  }

  .count-label br {
    display: none;
  }

  /* comandi e legenda: un unico blocco ancorato in basso a sinistra,
     si impilano fra loro senza offset calcolati */
  .panel-side {
    bottom: clamp(18px, 2.6vh, 44px);
    left: clamp(20px, 2.4vw, 52px);
    align-items: flex-start;
    gap: clamp(12px, 1.8vh, 22px);
    max-width: 36ch;
  }

  .controls {
    flex-direction: column;
    align-items: flex-start;
    gap: 9px;
  }

  .switch-btn {
    font-size: clamp(15px, 1.15vw, 20px);
    padding: 9px 22px;
  }

  .mode-note {
    font-size: clamp(13px, 0.9vw, 17px);
  }

  .legend {
    display: grid;
    gap: clamp(5px, 0.7vh, 10px);
  }

  .legend-row {
    font-size: clamp(14px, 1vw, 19px);
    gap: 0.7em;
  }

  .legend-dot {
    width: 0.85em;
    height: 0.85em;
  }

  .reset {
    top: auto;
    bottom: clamp(18px, 2.6vh, 44px);
    left: 50%;
    right: auto;
    transform: translateX(-50%);
    font-size: 15px;
  }

  .panel-join {
    bottom: clamp(18px, 2.6vh, 44px);
    right: clamp(20px, 2.4vw, 52px);
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .qr-card {
    gap: 0.6em;
    padding: clamp(10px, 1vw, 18px);
    border-radius: 14px;
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  }

  .qr-card svg {
    width: clamp(120px, 9.5vw, 200px);
  }

  .qr-caption {
    display: block;
    color: #1b2040;
    font-family: var(--display);
    font-weight: 700;
    font-size: clamp(13px, 0.9vw, 17px);
    text-align: center;
    line-height: 1.2;
    margin: 0;
    max-width: 16ch;
  }

  .join {
    font-size: clamp(14px, 1vw, 18px);
    padding: 12px;
  }
}

/* ========================================================================
   QUIZ (telefono)
   ======================================================================== */

.quiz {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 20px 18px calc(20px + env(safe-area-inset-bottom));
  max-width: 560px;
  margin: 0 auto;
  background:
    radial-gradient(120% 60% at 50% 0%, #161e52 0%, transparent 60%),
    var(--night);
}

.progress {
  display: flex;
  gap: 5px;
  margin-bottom: 26px;
}

.progress span {
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--hairline);
  transition: background 0.3s ease;
}

.progress span.done {
  background: var(--focus);
}

.progress span.current {
  background: var(--ink);
}

.step-index {
  font-size: 14px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.question {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(26px, 7vw, 34px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 26px;
}

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

.option {
  appearance: none;
  width: 100%;
  text-align: left;
  font: inherit;
  font-size: 17px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 17px 18px;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}

.option:active {
  transform: scale(0.985);
  background: var(--surface-2);
}

.option.picked {
  background: var(--surface-2);
  border-color: var(--focus);
}

.quiz-foot {
  margin-top: auto;
  padding-top: 26px;
}

.back {
  appearance: none;
  background: none;
  border: none;
  color: var(--muted);
  font: inherit;
  font-size: 15px;
  padding: 8px 0;
  cursor: pointer;
}

.field {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.field label {
  font-size: 15px;
  color: var(--muted);
}

.field input {
  font: inherit;
  font-size: 19px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 15px 16px;
}

.field input::placeholder {
  color: rgba(140, 151, 201, 0.65);
}

.primary {
  appearance: none;
  width: 100%;
  font: inherit;
  font-family: var(--display);
  font-weight: 700;
  font-size: 19px;
  color: #0b1030;
  background: var(--focus);
  border: none;
  border-radius: 12px;
  padding: 17px;
  cursor: pointer;
}

.primary:disabled {
  opacity: 0.4;
  cursor: default;
}

.note {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  margin: 14px 0 0;
}

.error {
  color: #ffb3a0;
  font-size: 15px;
  margin: 14px 0 0;
}

/* esito */

.result-cluster {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(34px, 10vw, 48px);
  line-height: 1;
  letter-spacing: -0.02em;
  margin: 6px 0 8px;
}

.result-blurb {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 22px;
}

.mini {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 14px;
  background: rgba(11, 16, 48, 0.6);
  border: 1px solid var(--hairline);
  display: block;
}

.mini-caption {
  font-size: 14px;
  color: var(--muted);
  margin: 12px 0 0;
  line-height: 1.5;
}

.explainer {
  margin-top: 26px;
  border-top: 1px solid var(--hairline);
  padding-top: 20px;
}

.explainer h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 21px;
  margin: 0 0 8px;
}

.explainer p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 14px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}