/* ==========================================================================
   SISTEMA SONNO — Base: reset, tipografia, componenti condivisi
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.4s ease, color 0.4s ease;
}

img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { list-style: none; }

::selection { background: var(--c-accent-1); color: var(--c-bg); }

:focus-visible { outline: 2px solid var(--c-accent-1); outline-offset: 3px; }

/* ---- Typography ------------------------------------------------------- */

h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--text-hero); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-lg); line-height: 1.25; }

p + p { margin-top: var(--space-4); }

.lead {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--c-text-2);
  font-weight: 300;
}

.emph {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.4;
  color: var(--c-text);
}

.text-muted { color: var(--c-text-2); }
.text-faint { color: var(--c-text-faint); }
.mono { font-family: var(--font-mono); font-size: var(--text-sm); }

/* Label editoriale: maiuscoletto spaziato */
.label {
  display: inline-flex;
  align-items: center;
  gap: 0.75em;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-text-2);
}
.label::before {
  content: "";
  width: 2.2em;
  height: 1px;
  background: var(--c-accent-1);
}
.label.bare::before { display: none; }

/* Numero di sezione, stile dossier */
.sec-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--c-text-faint);
}

/* ---- Layout ------------------------------------------------------------ */

.wrap { max-width: var(--wrap-max); margin: 0 auto; padding-left: var(--wrap-pad); padding-right: var(--wrap-pad); }
.wrap-narrow { max-width: var(--wrap-narrow); }

.rule { border: 0; border-top: 1px solid var(--c-line); }

/* ---- Buttons ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  padding: 1em 1.7em;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--c-text);
  color: var(--c-text);
  background: transparent;
  cursor: pointer;
  transition: background 0.25s var(--ease-out), color 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}
.btn svg { width: 1.1em; height: 1.1em; flex: none; transition: transform 0.25s var(--ease-out); }
.btn:hover { background: var(--c-text); color: var(--c-bg); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary { background: var(--c-text); color: var(--c-bg); border-color: var(--c-text); }
.btn-primary:hover { background: var(--c-accent-1); border-color: var(--c-accent-1); color: #fff; }

/* Bottoni dentro le bande scure */
.band .btn { border-color: var(--c-ink-text); color: var(--c-ink-text); }
.band .btn:hover { background: var(--c-ink-text); color: var(--c-ink); }
.band .btn-primary { background: var(--c-ink-text); color: var(--c-ink); }
.band .btn-primary:hover { background: var(--c-accent-1); border-color: var(--c-accent-1); color: #fff; }

/* Link testuale con freccia */
.tlink {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent-1);
  border-bottom: 1px solid transparent;
  padding-bottom: 0.35em;
  transition: border-color 0.25s;
}
.tlink svg { width: 1.2em; height: 1.2em; transition: transform 0.25s var(--ease-out); }
.tlink:hover { border-color: var(--c-accent-1); }
.tlink:hover svg { transform: translateX(4px); }

/* ---- Reveal on scroll ---------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}