@font-face {
  font-family: "PerformFont";
  src: url("calcolatore-massimale/fonts/PerformFont5-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "PerformFont";
  src: url("calcolatore-massimale/fonts/PerformFont5-SemiBold.ttf") format("truetype");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "PerformFont";
  src: url("calcolatore-massimale/fonts/PerformFont5-ExtraBold.ttf") format("truetype");
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

:root {
  --tools-bg: #faf8f4;
  --tools-surface: #fff;
  --tools-surface-2: #f4f1eb;
  --tools-text: #181a20;
  --tools-muted: #545c68;
  --tools-faint: #8a909b;
  --tools-line: rgba(23, 25, 31, .10);
  --tools-line-strong: rgba(23, 25, 31, .17);
  --tools-brand: #ff6b35;
  --tools-brand-deep: #d8480f;
  --tools-display: "PerformFont", system-ui, sans-serif;
  --tools-body: "PerformFont", system-ui, sans-serif;
  --tools-container: 1200px;
}

/* Elementi condivisi da tutte le pagine della sezione Strumenti. */
button, input, textarea, select { font: inherit; }
.site-nav {
  height: 72px;
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  border-bottom: 1px solid var(--tools-line);
  background: rgba(250, 248, 244, .84);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
  backdrop-filter: saturate(160%) blur(18px);
  box-shadow: 0 8px 24px -22px rgba(23, 25, 31, .35);
  font-family: var(--tools-body);
}

.site-nav-inner {
  max-width: var(--tools-container);
  height: 100%;
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  gap: 36px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--tools-text);
  text-decoration: none;
  font-family: var(--tools-display);
  font-size: 19px;
  font-weight: 600;
}

.site-logo img { width: 34px; height: 34px; border-radius: 9px; }
.site-nav-links { display: flex; gap: 28px; margin-left: auto; }
.site-nav-links a {
  position: relative;
  color: var(--tools-muted);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 500;
  transition: color .25s ease;
}
.site-nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1.5px;
  background: var(--tools-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.site-nav-links a:hover, .site-nav-links a[aria-current="page"] { color: var(--tools-text); }
.site-nav-links a:hover::after, .site-nav-links a[aria-current="page"]::after { transform: scaleX(1); }
.site-nav-cta {
  padding: 10px 20px;
  border-radius: 11px;
  color: #fff;
  background: linear-gradient(180deg, #ff8049, var(--tools-brand));
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 20px -8px rgba(255, 107, 53, .5);
  transition: transform .25s ease, box-shadow .25s ease;
}
.site-nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 26px -8px rgba(255, 107, 53, .55); }
.site-burger {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0 10px;
  border: 1px solid var(--tools-line-strong);
  border-radius: 11px;
  background: transparent;
  cursor: pointer;
}
.site-burger span { display: block; width: 100%; height: 2px; margin: 6px 0; border-radius: 2px; background: var(--tools-text); transition: transform .3s ease; }
.site-burger.is-open span:first-child { transform: translateY(4px) rotate(45deg); }
.site-burger.is-open span:last-child { transform: translateY(-4px) rotate(-45deg); }
.site-mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: grid;
  place-items: center;
  background: rgba(250, 248, 244, .98);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  opacity: 0;
  transition: opacity .3s ease;
  font-family: var(--tools-body);
}
.site-mobile-menu[hidden] { display: none; }
.site-mobile-menu.is-open { opacity: 1; }
.site-mobile-menu nav { display: flex; flex-direction: column; gap: 24px; text-align: center; }
.site-mobile-menu a { color: var(--tools-text); text-decoration: none; font-family: var(--tools-display); font-size: 2rem; font-weight: 600; }
.site-mobile-menu .site-mobile-cta { padding: 13px 24px; border-radius: 12px; color: #fff; background: var(--tools-brand); font-family: var(--tools-body); font-size: 1rem; }

.site-footer {
  padding: 64px 0 30px;
  border-top: 1px solid var(--tools-line);
  color: var(--tools-text);
  background: var(--tools-surface-2);
  font-family: var(--tools-body);
}
.site-footer-inner { width: min(var(--tools-container), calc(100% - 56px)); margin: 0 auto; }
.site-footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.site-footer-brand p { margin: 16px 0 0; color: var(--tools-faint); font-size: 14px; }
.site-footer-col h2 { margin: 0 0 12px; color: var(--tools-faint); text-transform: uppercase; letter-spacing: .16em; font-size: 10px; }
.site-footer-col a { display: block; padding: 5px 0; color: var(--tools-muted); text-decoration: none; font-size: 14px; transition: color .25s ease, transform .25s ease; }
.site-footer-col a:hover { color: var(--tools-brand-deep); transform: translateX(3px); }
.site-footer-bottom { margin-top: 48px; padding-top: 25px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--tools-line); color: var(--tools-faint); font-size: 13px; }
.site-footer-top { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--tools-line-strong); border-radius: 12px; color: var(--tools-muted); text-decoration: none; transition: transform .25s ease, color .25s ease, border-color .25s ease; }
.site-footer-top:hover { color: var(--tools-brand-deep); border-color: var(--tools-brand); transform: translateY(-3px); }

/* Hub /strumenti/. */
.tools-page { margin: 0; color: var(--tools-text); background: var(--tools-bg); font-family: var(--tools-body); -webkit-font-smoothing: antialiased; }
.tools-page *, .tools-page *::before, .tools-page *::after { box-sizing: border-box; }
.tools-page .tools-container { width: min(var(--tools-container), calc(100% - 56px)); margin: 0 auto; }
.tools-main { min-height: 100vh; padding-top: 72px; overflow: hidden; }
.tools-hero { position: relative; padding: clamp(90px, 13vw, 160px) 0 72px; }
.tools-hero::before { content: ""; position: absolute; width: 620px; height: 620px; top: -300px; right: -130px; border-radius: 50%; background: rgba(255, 107, 53, .12); filter: blur(55px); }
.tools-kicker { margin: 0 0 20px; color: var(--tools-brand-deep); text-transform: uppercase; letter-spacing: .17em; font-size: 11px; font-weight: 700; }
.tools-hero h1 { max-width: 960px; margin: 0; font-family: var(--tools-display); font-size: clamp(54px, 8vw, 108px); line-height: .91; letter-spacing: -.052em; font-weight: 600; }
.tools-hero h1 em { color: var(--tools-brand); font-style: normal; }
.tools-lead { max-width: 660px; margin: 32px 0 0; color: var(--tools-muted); font-size: clamp(18px, 2vw, 22px); line-height: 1.55; }
.tools-list { padding: 12px 0 120px; }
.tool-card { position: relative; min-height: 390px; padding: clamp(32px, 6vw, 70px); display: grid; grid-template-columns: 1fr .9fr; align-items: end; gap: 60px; overflow: hidden; border: 1px solid var(--tools-line); border-radius: 30px; color: #fff; background: radial-gradient(70% 130% at 85% 5%, rgba(255, 128, 73, .25), transparent 55%), #17140f; box-shadow: 0 40px 80px -55px rgba(23, 20, 15, .8); }
.tool-card::after { content: "1RM"; position: absolute; right: -18px; top: -38px; color: rgba(255,255,255,.045); font-family: var(--tools-display); font-size: clamp(170px, 25vw, 340px); line-height: 1; font-weight: 700; letter-spacing: -.08em; }
.tool-card-copy, .tool-card-action { position: relative; z-index: 1; }
.tool-number { display: block; margin-bottom: 30px; color: #ff9168; letter-spacing: .14em; font-size: 11px; font-weight: 700; }
.tool-card h2 { margin: 0 0 20px; font-family: var(--tools-display); font-size: clamp(42px, 5vw, 68px); line-height: .94; letter-spacing: -.04em; font-weight: 600; }
.tool-card p { max-width: 580px; margin: 0; color: #bdb7af; font-size: 17px; line-height: 1.55; }
.tool-card-action { display: flex; justify-content: flex-end; }
.tool-link { min-width: 230px; padding: 19px 24px; display: flex; justify-content: space-between; align-items: center; border-radius: 14px; color: #fff; background: linear-gradient(180deg, #ff8049, var(--tools-brand)); text-decoration: none; font-weight: 700; box-shadow: 0 18px 36px -18px rgba(255,107,53,.8); transition: transform .25s ease, box-shadow .25s ease; }
.tool-link span { font-size: 28px; font-weight: 400; transition: transform .25s ease; }
.tool-link:hover { transform: translateY(-3px); box-shadow: 0 24px 44px -18px rgba(255,107,53,.9); }
.tool-link:hover span { transform: translateX(5px); }
.tools-future { margin-top: 28px; padding: 26px 2px; display: flex; justify-content: space-between; gap: 30px; border-top: 1px solid var(--tools-line); border-bottom: 1px solid var(--tools-line); color: var(--tools-muted); }
.tools-future strong { color: var(--tools-text); }

@media (max-width: 900px) {
  .site-nav-links, .site-nav-cta { display: none; }
  .site-burger { display: block; margin-left: auto; }
  .site-footer-grid { grid-template-columns: 1fr 1fr; }
  .tool-card { grid-template-columns: 1fr; gap: 42px; }
  .tool-card-action { justify-content: flex-start; }
}

@media (max-width: 620px) {
  .site-nav { height: 64px; }
  .site-nav-inner { padding: 0 15px; }
  .site-logo { font-size: 16px; }
  .site-logo img { width: 31px; height: 31px; }
  .site-footer-inner, .tools-page .tools-container { width: calc(100% - 30px); }
  .site-footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .site-footer-bottom { flex-direction: column; align-items: flex-start; gap: 18px; }
  .tools-main { padding-top: 64px; }
  .tools-hero { padding: 70px 0 55px; }
  .tools-hero h1 { font-size: clamp(52px, 16vw, 76px); }
  .tools-lead { margin-top: 24px; font-size: 17px; }
  .tools-list { padding-bottom: 78px; }
  .tool-card { min-height: 480px; padding: 28px 22px; border-radius: 22px; }
  .tool-card::after { top: 20px; right: -22px; font-size: 190px; }
  .tool-card h2 { font-size: 45px; }
  .tool-link { width: 100%; min-width: 0; }
  .tools-future { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}