/* =========================================================
   STILE: colori e aspetto della pagina
   I colori definiti qui sono letti anche dalla pioggia (js/rain.js),
   quindi basta cambiarli in questo punto.
   ========================================================= */
:root {
  --bg: #000000;                    /* sfondo */
  --rain: #00ff41;                  /* verde dei caratteri */
  --head: #d8ffe0;                  /* carattere in testa a ogni colonna */
  --trail: rgba(0, 255, 65, 0.75);  /* caratteri che cambiano nella scia */
  --glow: rgba(0, 255, 65, 0.6);    /* alone luminoso della scritta */

  color-scheme: dark;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* La pagina resta nera anche con il tema chiaro del sistema */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #000000; }
}
:root[data-theme="dark"] { --bg: #000000; }

html { scroll-padding-top: env(safe-area-inset-top, 0px); }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  overflow: hidden;
}

/* ---------- Pioggia ---------- */
canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* ---------- Scritta centrale ---------- */
.portal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
}

.portal a {
  pointer-events: auto;
  font-family: "Share Tech Mono", "Courier New", Courier, monospace;
  font-size: clamp(2.4rem, 11vw, 7.5rem);   /* dimensione della scritta */
  letter-spacing: 0.06em;
  color: var(--rain);
  text-decoration: none;
  padding: 0.5em 1em;
  background: radial-gradient(ellipse at center, rgba(0,0,0,0.95) 35%, rgba(0,0,0,0.7) 55%, rgba(0,0,0,0) 75%);
  text-shadow: 0 0 6px var(--glow), 0 0 22px var(--glow);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.4s ease, visibility 0s linear 1.4s, color 0.25s ease, text-shadow 0.25s ease;
}

.portal a.visible {
  opacity: 1;
  visibility: visible;
  transition: opacity 1.4s ease, visibility 0s, color 0.25s ease, text-shadow 0.25s ease;
}

.portal a:hover {
  color: var(--head);
  text-shadow: 0 0 8px var(--glow), 0 0 30px var(--glow), 0 0 60px var(--glow);
}

.portal a:focus-visible {
  outline: 2px solid var(--rain);
  outline-offset: -0.35em;
}

.cursor {
  display: inline-block;
  margin-left: 0.05em;
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ---------- Pulsante musica ---------- */
.sound {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right, 0px));
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  font-family: "Share Tech Mono", "Courier New", Courier, monospace;
  font-size: 0.95rem;
  color: var(--rain);
  background: rgba(0, 0, 0, 0.78);
  border: 1px solid rgba(0, 255, 65, 0.45);
  padding: 0.5em 0.9em;
  cursor: pointer;
  text-shadow: 0 0 6px var(--glow);
  transition: color 0.2s ease, border-color 0.2s ease;
}
.sound:hover { color: var(--head); border-color: var(--rain); }
.sound:focus-visible { outline: 2px solid var(--rain); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
}