/* ============================================================
   Tentori TLS — Blog stylesheet
   Riusa i design token della home; layout indipendente.
   ============================================================ */

:root {
  --ink:        #111111;
  --ink-soft:   #333333;
  --paper:      #ffffff;
  --paper-2:    #f3f3f3;
  --rule:       #111111;
  --muted:      #777777;
  --hair:       1px;
  --col-max:    1400px;
  --prose-max:  720px;
  --gutter:     clamp(20px, 3vw, 48px);
  --baseline:   1.65;
  --serif:      "Fraunces", "Cormorant Garamond", Georgia, serif;
  --sans:       "Fira Sans", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono:       "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

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

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

body {
  margin: 0;
  font-family: var(--sans);
  font-weight: 300;
  color: var(--ink);
  background: var(--paper);
  line-height: var(--baseline);
  font-feature-settings: "kern","liga","calt";
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.wrap {
  max-width: var(--col-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Meta-bar ticker (come home) ---------- */
.meta-bar {
  border-bottom: var(--hair) solid var(--ink);
  background: var(--paper);
  font-family: var(--mono);
  text-transform: uppercase;
  font-size: .68rem;
  letter-spacing: .14em;
  overflow: hidden;
  padding: 10px 0;
  position: relative;
}
.meta-bar__track {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  animation: metaticker 60s linear infinite;
  will-change: transform;
}
.meta-bar:hover .meta-bar__track { animation-play-state: paused; }
.meta-bar__group {
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding-right: clamp(24px, 4vw, 56px);
}
.meta-bar__group > span { display: inline-flex; align-items: center; }
.meta-bar__group > span::after {
  content: "·";
  display: inline-block;
  margin: 0 clamp(20px, 4vw, 56px);
  opacity: .45;
}
.meta-bar em { font-style: normal; color: var(--ink); font-weight: 500; }
@keyframes metaticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .meta-bar__track { animation: none; }
}
@media (max-width: 520px) { .meta-bar { font-size: .62rem; } }

/* ---------- Link underline (come home) ---------- */
a.link {
  position: relative;
  text-decoration: none;
  padding-bottom: 2px;
  background-image: linear-gradient(var(--ink), var(--ink));
  background-size: 100% var(--hair);
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: background-size .45s cubic-bezier(.2,.6,.2,1);
}
a.link:hover { background-size: 0 var(--hair); }

/* ---------- Nav (identica alla home) ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: saturate(120%) blur(8px);
  -webkit-backdrop-filter: saturate(120%) blur(8px);
  border-bottom: var(--hair) solid var(--ink);
}
.nav__inner {
  max-width: var(--col-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: clamp(16px, 3vw, 48px);
  align-items: center;
  padding: 16px var(--gutter);
}
.nav__mark {
  display: inline-flex; align-items: center; gap: 14px;
  text-decoration: none; color: var(--ink);
}
.nav__mark::before {
  content:""; width: var(--hair); background: var(--ink);
  align-self: stretch; min-height: 28px;
}
.nav__mark-name { display: flex; flex-direction: column; line-height: 1; }
.nav__mark-name strong {
  font-family: var(--sans); font-weight: 400; font-size: 1.05rem; letter-spacing: -0.01em;
}
.nav__mark-name span {
  font-family: var(--mono); font-size: .64rem; letter-spacing: .22em;
  text-transform: uppercase; margin-top: 3px; opacity: .75;
}
.nav__links {
  display: flex; gap: clamp(14px, 2.2vw, 32px); justify-content: center;
  font-family: var(--mono); text-transform: uppercase; font-size: .72rem; letter-spacing: .14em;
}
.nav__links a { text-decoration: none; }
.nav__links a.link { background-size: 0 var(--hair); }
.nav__links a.link:hover, .nav__links a[aria-current] { background-size: 100% var(--hair); }
.nav__cta {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); text-transform: uppercase; font-size: .72rem; letter-spacing: .14em;
  text-decoration: none; padding: 10px 16px; border: var(--hair) solid var(--ink);
  color: var(--ink); background: transparent; transition: background .2s, color .2s;
}
.nav__cta:hover { background: var(--ink); color: var(--paper); }
.nav__cta svg { width: 15px; height: 15px; transition: transform .35s cubic-bezier(.2,.6,.2,1); }
.nav__cta:hover svg { transform: translateX(4px); }

/* Hamburger */
.nav__burger {
  display: none; width: 42px; height: 42px; background: transparent;
  border: var(--hair) solid var(--ink); cursor: pointer; padding: 0; position: relative;
}
.nav__burger::before, .nav__burger::after {
  content:""; position: absolute; left: 10px; right: 10px; height: var(--hair);
  background: var(--ink); transition: transform .3s, top .3s, bottom .3s;
}
.nav__burger::before { top: 16px; }
.nav__burger::after  { bottom: 16px; }
.nav__burger[aria-expanded="true"]::before { top: 50%; transform: translateY(-50%) rotate(45deg); }
.nav__burger[aria-expanded="true"]::after  { bottom: 50%; transform: translateY(50%) rotate(-45deg); }

/* Mobile menu */
.mobile-menu {
  position: fixed; top: 0; left: 0; right: 0; background: var(--paper);
  border-bottom: var(--hair) solid var(--ink); padding: 84px var(--gutter) 36px;
  z-index: 40; transform: translateY(-100%);
  transition: transform .45s cubic-bezier(.2,.6,.2,1); display: none;
}
.mobile-menu[data-open="true"] { transform: translateY(0); }
.mobile-menu__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 18px; }
.mobile-menu__list a {
  display: block; font-family: var(--serif); font-weight: 300;
  font-variation-settings: "opsz" 144; font-size: 2rem; line-height: 1;
  letter-spacing: -0.015em; text-decoration: none; color: var(--ink); padding: 6px 0;
}
.mobile-menu__list a em { font-style: italic; }
.mobile-menu__meta {
  margin-top: 36px; padding-top: 20px; border-top: var(--hair) solid var(--ink);
  font-family: var(--mono); text-transform: uppercase; font-size: .68rem;
  letter-spacing: .14em; color: var(--muted); display: flex; flex-direction: column; gap: 6px;
}
.mobile-menu__meta a { color: var(--ink); text-decoration: none; }

@media (max-width: 880px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .nav__inner { grid-template-columns: auto 1fr; justify-items: end; }
  .nav__burger { display: inline-block; }
  .mobile-menu { display: block; }
}

/* ---------- Breadcrumb ---------- */
.crumb {
  font-family: var(--mono); font-size: .68rem; text-transform: uppercase;
  letter-spacing: .16em; color: var(--muted);
  padding: 22px 0 0;
}
.crumb a { text-decoration: none; color: var(--muted); }
.crumb a:hover { color: var(--ink); }
.crumb span { margin: 0 8px; }

/* ---------- Blog index hero ---------- */
.blog-hero {
  padding: clamp(48px, 8vw, 100px) 0 clamp(32px, 5vw, 56px);
  border-bottom: var(--hair) solid var(--ink);
}
.blog-hero__kicker {
  font-family: var(--mono); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .24em; color: var(--muted); margin-bottom: 22px;
}
.blog-hero h1 {
  font-family: var(--serif); font-weight: 340; letter-spacing: -0.015em;
  font-size: clamp(2.4rem, 6vw, 4.4rem); line-height: 1.03; margin: 0;
}
.blog-hero h1 em { font-style: italic; }
.blog-hero p {
  max-width: 620px; margin: 26px 0 0; font-size: 1.08rem; color: var(--ink-soft);
}

/* ---------- Cluster + cards ---------- */
.cluster { padding: clamp(40px, 6vw, 72px) 0; border-bottom: var(--hair) solid #e4e4e4; }
.cluster:last-of-type { border-bottom: none; }
.cluster__head {
  display: flex; align-items: baseline; gap: 16px; margin-bottom: 34px;
}
.cluster__num {
  font-family: var(--mono); font-size: .8rem; color: var(--muted);
}
.cluster__title {
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-size: clamp(1.5rem, 3vw, 2.1rem); margin: 0;
}
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 400px)); gap: 24px; }
.card {
  background: var(--paper); padding: 32px 30px 34px; text-decoration: none; color: inherit;
  display: flex; flex-direction: column; min-height: 240px;
  border: var(--hair) solid #e0e0e0;
  transition: background .3s ease, border-color .3s ease;
}
.card:hover { background: var(--paper-2); border-color: var(--ink); }
.card__meta {
  font-family: var(--mono); font-size: .66rem; text-transform: uppercase;
  letter-spacing: .14em; color: var(--muted); margin-bottom: 18px;
  display: flex; gap: 14px;
}
.card__title {
  font-family: var(--serif); font-weight: 400; font-size: 1.4rem; line-height: 1.2;
  letter-spacing: -0.01em; margin: 0 0 14px;
}
.card__excerpt { font-size: .95rem; color: var(--ink-soft); margin: 0; }
.card__more {
  margin-top: auto; padding-top: 22px; font-family: var(--mono);
  font-size: .68rem; text-transform: uppercase; letter-spacing: .16em;
}

/* ---------- Article ---------- */
.article { padding: clamp(36px, 5vw, 64px) 0 clamp(48px, 7vw, 88px); }
.article__inner { max-width: var(--prose-max); margin: 0 auto; }
.article__kicker {
  font-family: var(--mono); font-size: .7rem; text-transform: uppercase;
  letter-spacing: .2em; color: var(--muted); margin-bottom: 20px;
}
.article h1 {
  font-family: var(--serif); font-weight: 340; letter-spacing: -0.015em;
  font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.08; margin: 0 0 24px;
}
.article__meta {
  font-family: var(--mono); font-size: .72rem; color: var(--muted);
  display: flex; gap: 18px; flex-wrap: wrap;
  padding-bottom: 30px; margin-bottom: 40px;
  border-bottom: var(--hair) solid var(--ink);
}
.prose { font-size: 1.075rem; color: var(--ink-soft); }
.prose > * + * { margin-top: 1.4em; }
.prose h2 {
  font-family: var(--serif); font-weight: 500; color: var(--ink);
  font-size: 1.6rem; letter-spacing: -0.01em; line-height: 1.2;
  margin-top: 2.2em; margin-bottom: .2em;
}
.prose h3 {
  font-family: var(--sans); font-weight: 600; color: var(--ink);
  font-size: 1.12rem; margin-top: 1.8em;
}
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: .5em; }
.prose blockquote {
  border-left: 3px solid var(--ink); margin: 1.8em 0; padding: 4px 0 4px 24px;
  font-family: var(--serif); font-style: italic; font-size: 1.2rem; color: var(--ink);
}
.prose .lead { font-size: 1.2rem; color: var(--ink); }
.prose .callout {
  background: var(--paper-2); border: var(--hair) solid #e0e0e0;
  padding: 22px 26px; font-size: .98rem;
}
.prose .callout strong { display: block; margin-bottom: 6px; font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .14em; }

/* ---------- CTA block ---------- */
.cta {
  max-width: var(--prose-max); margin: clamp(48px, 6vw, 72px) auto 0;
  border: var(--hair) solid var(--ink); padding: clamp(30px, 4vw, 46px);
  display: flex; flex-direction: column; gap: 20px;
}
.cta__title {
  font-family: var(--serif); font-weight: 400; font-size: 1.6rem; line-height: 1.2; margin: 0;
}
.cta__title em { font-style: italic; }
.cta__row { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.cta__btn {
  font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .14em;
  background: var(--ink); color: var(--paper); padding: 14px 22px; text-decoration: none;
  transition: opacity .25s ease;
}
.cta__btn:hover { opacity: .82; }
.cta__link {
  font-family: var(--mono); font-size: .74rem; text-transform: uppercase; letter-spacing: .14em;
  text-decoration: none; border-bottom: var(--hair) solid var(--ink); padding-bottom: 3px;
}

/* ---------- Related ---------- */
.related { max-width: var(--prose-max); margin: clamp(40px,5vw,64px) auto 0; }
.related__label {
  font-family: var(--mono); font-size: .7rem; text-transform: uppercase;
  letter-spacing: .16em; color: var(--muted); margin-bottom: 18px;
}
.related a { display: block; text-decoration: none; padding: 16px 0; border-top: var(--hair) solid #e4e4e4; }
.related a:last-child { border-bottom: var(--hair) solid #e4e4e4; }
.related a span { font-family: var(--serif); font-size: 1.15rem; }

/* ---------- Footer ---------- */
.foot {
  border-top: var(--hair) solid var(--ink); margin-top: 0;
  padding: 40px 0; font-family: var(--mono); font-size: .72rem;
  color: var(--muted);
}
.foot__inner {
  max-width: var(--col-max); margin: 0 auto; padding: 0 var(--gutter);
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.foot a { text-decoration: none; color: var(--muted); }
.foot a:hover { color: var(--ink); }