/* /strumenti-gratuiti — stile coerente con /login e /guide. 14/11/2026 */
.st-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
.st-hero{min-height:auto;padding:140px 16px 64px;}
.st-hero h1{font-size:clamp(30px,4.8vw,52px);}
.st-hero .lead{margin-bottom:26px;}
.st-search{position:relative;z-index:2;width:100%;max-width:560px;margin:0 auto;display:flex;align-items:center;gap:10px;
  padding:0 8px 0 18px;height:58px;border-radius:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:border-color .15s,background-color .15s,box-shadow .15s;}
.st-search:focus-within{border-color:#FF6600;background:rgba(255,255,255,.12);box-shadow:0 0 0 4px rgba(255,102,0,.18);}
.st-search .material-symbols-outlined{color:rgba(247,244,240,.6);font-size:24px;}
.st-search input{flex:1;min-width:0;height:100%;border:0;background:transparent;color:#fff;font:inherit;font-size:17px;outline:none;}
.st-search input::placeholder{color:rgba(247,244,240,.5);}

.st-wrap{max-width:1180px;padding:36px 16px 80px;}
.st-chips{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 14px;margin:0 0 18px;scrollbar-width:none;}
.st-chips::-webkit-scrollbar{display:none;}
.st-chip{flex:none;display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 14px;border-radius:999px;cursor:pointer;
  border:1px solid var(--border-2);background:var(--surface);color:var(--text);font:inherit;font-size:14px;font-weight:600;transition:all .15s;}
.st-chip .material-symbols-outlined{font-size:18px;color:var(--text-mute);}
.st-chip > span:last-child{font-size:12px;font-weight:600;color:var(--text-mute);background:var(--surface-2);border-radius:999px;padding:2px 7px;}
.st-chip:hover{border-color:#FF6600;}
.st-chip.is-on{background:#12161C;border-color:#12161C;color:#fff;}
.st-chip.is-on .material-symbols-outlined{color:#FF9A55;}
.st-chip.is-on > span:last-child{background:rgba(255,255,255,.14);color:#fff;}

.st-group{margin:0 0 40px;scroll-margin-top:100px;}
.st-group-head{display:flex;align-items:baseline;gap:6px 14px;flex-wrap:wrap;margin:0 0 14px;}
.st-group-head h2{margin:0;font-size:22px;letter-spacing:-.02em;color:var(--text);}
.st-group-head p{margin:0;font-size:15px;color:var(--text-dim);}

.st-grid{display:grid;grid-template-columns:1fr;gap:12px;}
@media (min-width:640px){.st-grid{grid-template-columns:1fr 1fr;}}
@media (min-width:1000px){.st-grid{grid-template-columns:1fr 1fr 1fr;}}
.st-card{position:relative;display:flex;flex-direction:column;gap:14px;padding:22px;border-radius:18px;text-decoration:none;color:var(--text);
  background:var(--surface);border:1px solid var(--border);box-shadow:0 1px 2px rgba(18,22,28,.04),0 6px 20px rgba(18,22,28,.04);
  transition:transform .18s,box-shadow .18s,border-color .18s;overflow:hidden;}
.st-card::after{content:"";position:absolute;inset:auto -40px -60px auto;width:140px;height:140px;border-radius:50%;
  background:radial-gradient(circle,color-mix(in srgb,var(--tool) 22%,transparent),transparent 70%);opacity:0;transition:opacity .2s;}
.st-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--tool) 45%,var(--border));
  box-shadow:0 22px 44px -22px color-mix(in srgb,var(--tool) 55%,transparent);}
.st-card:hover::after{opacity:1;}
.st-card[hidden]{display:none;}
.st-ico{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;font-size:26px;color:var(--tool);
  background:color-mix(in srgb,var(--tool) 12%,#fff);}
.st-body{display:flex;flex-direction:column;gap:6px;}
.st-body strong{font-size:17px;line-height:1.3;letter-spacing:-.01em;}
.st-body > span{font-size:14.5px;line-height:1.55;color:var(--text-dim);}
.st-new{font-style:normal;font-size:11px;font-weight:700;color:#fff;background:#FF6600;border-radius:999px;padding:2px 8px;vertical-align:middle;margin-left:4px;}
.st-go{margin-top:auto;display:inline-flex;align-items:center;gap:4px;font-size:14px;font-weight:600;color:var(--tool);}
.st-go .material-symbols-outlined{font-size:18px;transition:transform .18s;}
.st-card:hover .st-go .material-symbols-outlined{transform:translateX(4px);}

.st-empty{text-align:center;font-size:16px;color:var(--text-dim);padding:30px 0;}
.st-faq{max-width:760px;margin:30px auto 0;}
.st-faq h2{font-size:22px;margin:0 0 14px;}
.st-faq details{border:1px solid var(--border-2);border-radius:14px;background:var(--surface);margin:0 0 8px;}
.st-faq summary{cursor:pointer;padding:16px 18px;font-weight:600;font-size:16px;}
.st-faq details p{margin:0;padding:0 18px 16px;font-size:15.5px;line-height:1.6;color:var(--text-dim);}
.st-cta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin:40px auto 0;max-width:760px;padding:22px 24px;border-radius:18px;
  color:#F7F4F0;background-color:#12161C;background-image:radial-gradient(120% 120% at 110% 120%,rgba(31,173,151,.35) 0,rgba(31,173,151,0) 55%),radial-gradient(90% 90% at -10% -20%,rgba(255,102,0,.3) 0,rgba(255,102,0,0) 55%);}
.st-cta div{display:flex;flex-direction:column;gap:3px;}
.st-cta strong{font-size:18px;color:#fff;}
.st-cta span{font-size:14.5px;color:rgba(247,244,240,.72);}