/* ============================================================
   EdilBerat — base.css
   Design system condiviso: variabili, reset, tipografia, bottoni,
   utilità di sezione e animazioni reveal.
   ============================================================ */

:root{
  /* Colori marchio */
  --red:#8b0000;
  --red-600:#a50000;
  --red-700:#6d0000;
  --gold:#c9a24b;

  /* Neutri caldi (pietra ligure) */
  --ink:#191715;
  --ink-soft:#3a3631;
  --muted:#6f6a63;
  --bg:#ffffff;
  --bg-soft:#f7f4f0;
  --bg-dark:#1b1916;
  --line:#eae5dd;
  --line-strong:#ddd6cb;

  /* Forme */
  --radius:14px;
  --radius-sm:10px;
  --radius-lg:22px;
  --shadow:0 10px 40px rgba(25,23,21,.10);
  --shadow-sm:0 4px 18px rgba(25,23,21,.08);

  /* Layout */
  --maxw:1200px;
  --header-h:84px;

  /* Movimento */
  --ease:cubic-bezier(.22,.61,.36,1);

  /* Font */
  --font-head:'Poppins',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --font-body:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h);overflow-x:hidden;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.12;letter-spacing:-.02em;color:var(--ink)}
::selection{background:var(--red);color:#fff}

/* Accessibilità */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
:focus-visible{outline:2px solid var(--red);outline-offset:3px;border-radius:4px}

/* Layout helpers */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:92px 0}
.section--soft{background:var(--bg-soft)}
.section--dark{background:var(--bg-dark);color:#f3efe9}
.section--dark h2,.section--dark h3{color:#fff}

.kicker{display:inline-block;font-family:var(--font-head);font-weight:600;font-size:.78rem;
  letter-spacing:.2em;text-transform:uppercase;color:var(--red);margin-bottom:14px}
.section--dark .kicker{color:var(--gold)}
.section-head{max-width:700px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-title{font-size:clamp(1.9rem,3.6vw,2.9rem)}
.section-sub{color:var(--muted);font-size:1.05rem;margin-top:14px}
.section--dark .section-sub{color:#cfc8bd}

/* ---------- Bottoni ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--font-head);
  font-weight:600;font-size:.95rem;padding:14px 26px;border-radius:999px;border:1.5px solid transparent;
  cursor:pointer;transition:transform .25s var(--ease),background .25s,box-shadow .25s,color .25s,border-color .25s;
  white-space:nowrap}
.btn i{font-size:1.05em}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 8px 24px rgba(139,0,0,.28)}
.btn-primary:hover{background:var(--red-600);transform:translateY(-2px);box-shadow:0 12px 30px rgba(139,0,0,.36)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--red);border-color:var(--red)}
.btn-outline:hover{background:var(--red);color:#fff;transform:translateY(-2px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000;transform:translateY(-2px)}
.btn-lg{padding:17px 34px;font-size:1.02rem}

/* ---------- Reveal allo scroll ---------- */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.js .reveal.d1{transition-delay:.08s}
.js .reveal.d2{transition-delay:.16s}
.js .reveal.d3{transition-delay:.24s}
.js .reveal.d4{transition-delay:.32s}

@keyframes fadeDown{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes bob{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition:none!important;scroll-behavior:auto!important}
  .js .reveal{opacity:1;transform:none}
}

@media (max-width:760px){
  .section{padding:64px 0}
}