/* OFFICIUM — fogli di stile */

/* ----- reset ----- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; }

/* ----- variabili ----- */
:root {
  --bg: #050505;
  --ink: #e8e6e1;
  --ink-dim: #6b6b6b;
  --ink-mute: #3d3d3d;
  --ash: #1a1a1a;
  --iron: #2a2a2a;
  --ember: #9a1b1b;          /* rosso pompeiano */
  --glow: #d92626;
  --vignette: 0;             /* pilotato da JS via TENEBRAE */
}

html, body {
  /* iOS: blocca rubber-band e zoom non voluti durante lo swipe */
  overscroll-behavior: none;
  touch-action: none;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-weight: 300;
  font-size: 14px;
  letter-spacing: 0.01em;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* su iPhone X+: lascia respirare le notch */
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.mono, kbd, .hud-cell, .legend, .tb-label, .tb-btn, .tb-value {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}

/* ----- layout ----- */
#stage {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  grid-template-columns: 1fr;
  padding: 1.4rem 2.2rem 1.2rem;
  gap: 1rem;
}

/* ----- fade-in al risveglio ----- */
.hud, .toolbar, .legend, .rota-wrap {
  opacity: 0;
  transition: opacity 1100ms ease 200ms;
}
.is-awakened .hud,
.is-awakened .toolbar,
.is-awakened .legend,
.is-awakened .rota-wrap {
  opacity: 1;
}

/* ----- HUD ----- */
.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  z-index: 2;
  gap: 1.2rem;
  flex-wrap: wrap;
}
.hud-top    { grid-row: 1; }
.hud-cell   { color: var(--ink); white-space: nowrap; }
.hud-dim    { color: var(--ink-dim); }
.hud-mark   { letter-spacing: 0.42em; font-weight: 500; }
#hud-tenebrae { color: var(--ember); }

/* ----- rota: canvas + parola al centro + play ----- */
.rota-wrap {
  grid-row: 2;
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.rota-frame {
  position: relative;
  width: min(72vh, 72vw, 720px);
  height: min(72vh, 72vw, 720px);
  max-width: 100%;
}
#rota {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
}
.rota-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  /* leggera traslazione verso l'alto per lasciare spazio al play sotto */
  padding-bottom: 14%;
}
#word {
  font-family: "Bebas Neue", sans-serif;
  font-size: clamp(3rem, 9vmin, 6.5rem);
  line-height: 0.9;
  letter-spacing: 0.06em;
  color: var(--ink);
  transition: opacity 480ms ease, color 600ms ease;
  text-shadow: 0 0 30px rgba(217, 38, 38, calc(var(--vignette) * 0.55));
  -webkit-font-smoothing: antialiased;
}
#word.is-fading { opacity: 0; }

.word-trans {
  margin-top: 0.4rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.4em;
  text-transform: lowercase;
  color: var(--ink-dim);
  transition: opacity 480ms ease 60ms;
}
.word-trans.is-fading { opacity: 0; }

/* ----- play / pause centrale ----- */
.play-toggle {
  position: absolute;
  left: 50%;
  bottom: 14%;
  transform: translateX(-50%);
  width: 52px;
  height: 52px;
  min-width: 44px;
  min-height: 44px;
  display: grid;
  place-items: center;
  background: rgba(5, 5, 5, 0.55);
  border: 1px solid var(--ink-mute);
  color: var(--ink);
  cursor: pointer;
  pointer-events: auto;
  transition: border-color 200ms ease, background 200ms ease, color 200ms ease;
  -webkit-tap-highlight-color: transparent;
}
.play-toggle:hover,
.play-toggle:focus-visible {
  border-color: var(--ink);
  outline: none;
}
.play-toggle:active {
  background: rgba(217, 38, 38, 0.08);
}
.play-toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  display: block;
}
.play-toggle .icon-pause { display: none; }
.play-toggle.is-playing { color: var(--ember); border-color: var(--ember); }
.play-toggle.is-playing .icon-play { display: none; }
.play-toggle.is-playing .icon-pause { display: block; }

/* ----- tenebrae hint: piccola guida visiva al primo accesso ----- */
.t-hint {
  position: fixed;
  right: 1.6rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
  font-family: "IBM Plex Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.3em;
  color: var(--ink-dim);
  opacity: 0;
  pointer-events: none;
  transition: opacity 1200ms ease;
  z-index: 5;
}
.is-awakened .t-hint { opacity: 1; }
.t-hint.is-fading { opacity: 0; }
.t-hint-top { color: var(--ink); }
.t-hint-bot { color: var(--ember); }
.t-hint-bar {
  width: 1px;
  height: 70px;
  background: linear-gradient(to bottom, rgba(232, 230, 225, 0.6), rgba(154, 27, 27, 0.85));
}

/* ----- toolbar: controlli sempre visibili ----- */
.toolbar {
  grid-row: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  z-index: 2;
}
.tb-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.tb-label {
  font-size: 9px;
  letter-spacing: 0.36em;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin-right: 0.5rem;
}
.tb-btn {
  appearance: none;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid var(--ink-mute);
  color: var(--ink);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  min-width: 44px;
  min-height: 44px;
  padding: 0 0.4rem;
  cursor: pointer;
  transition: border-color 150ms ease, color 150ms ease, background 150ms ease;
  -webkit-tap-highlight-color: transparent;
}
.tb-btn:hover { border-color: var(--ink-dim); }
.tb-btn:focus-visible { outline: none; border-color: var(--ink); }
.tb-btn:active { background: rgba(217, 38, 38, 0.08); }

.tb-btn.is-active {
  border-color: var(--ember);
  color: var(--ember);
}
.tb-btn.is-firing {
  background: rgba(217, 38, 38, 0.18);
  color: var(--glow);
  border-color: var(--glow);
}
.tb-value {
  min-width: 44px;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--ink);
}

/* ----- legend (scorciatoie da tastiera, desktop) ----- */
.legend {
  grid-row: 4;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem 1.8rem;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--ink-dim);
  z-index: 2;
}
.legend kbd { margin: 0 0.15rem; }

kbd {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--ink-mute);
  border-radius: 2px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 10px;
  color: var(--ink);
  letter-spacing: 0.15em;
  background: rgba(255, 255, 255, 0.02);
}

/* ----- vignette: TENEBRAE che mangia i bordi ----- */
#vignette {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    transparent 30%,
    rgba(0, 0, 0, calc(var(--vignette) * 0.85)) 75%,
    rgba(0, 0, 0, calc(var(--vignette) * 0.95)) 100%
  );
  z-index: 4;
}

/* ----- boot screen ----- */
#boot {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  z-index: 100;
}
.boot-frame { text-align: left; padding: 0 1.5rem; }
.boot-eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin-bottom: 2.5rem;
}
.boot-title {
  font-family: "Bebas Neue", sans-serif;
  font-size: clamp(3rem, 9vw, 6rem);
  line-height: 0.92;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin-bottom: 3rem;
  text-transform: uppercase;
}
.boot-line {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.32em;
  color: var(--ink-dim);
  text-transform: uppercase;
}

/* ----- responsive ----- */
@media (max-width: 720px) {
  #stage {
    padding: 0.8rem 0.7rem 0.7rem;
    gap: 0.6rem;
  }
  .hud {
    font-size: 9px;
    letter-spacing: 0.2em;
    gap: 0.6rem 1rem;
    justify-content: center;
  }
  .hud-mark { letter-spacing: 0.32em; }
  .rota-frame { width: min(88vw, 56vh); height: min(88vw, 56vh); }
  .toolbar { gap: 0.45rem 0.9rem; }
  .tb-label { font-size: 8px; letter-spacing: 0.28em; margin-right: 0.3rem; }
  .tb-btn {
    font-size: 11px;
    min-width: 44px;
    min-height: 44px;
    padding: 0 0.3rem;
  }
  .tb-value { font-size: 11px; min-width: 38px; }
  .legend {
    grid-row: 4;
    gap: 0.4rem 0.9rem;
    font-size: 8px;
    letter-spacing: 0.22em;
  }
  .legend kbd { font-size: 8px; padding: 0 4px; }
  .play-toggle {
    width: 48px;
    height: 48px;
    bottom: 12%;
  }
  .t-hint {
    right: 2%;
    font-size: 8px;
  }
  .t-hint-bar { height: 50px; }
}

/* ----- screen ancora più stretti: la legenda non serve, la toolbar dice tutto ----- */
@media (max-width: 480px) {
  .legend { display: none; }
  #stage { grid-template-rows: auto 1fr auto; }
}