/* ============================================================
   Centro Studi · Claude — portale interno Team Sfizio
   Estetica: atlante editoriale · carta calda + terracotta
   ============================================================ */

:root {
  --paper:      #F3EFE6;
  --paper-alt:  #ECE6D8;
  --surface:    #FBF9F3;
  --ink:        #211C16;
  --ink-soft:   #5E5648;
  --ink-faint:  #8A8170;
  --line:       #D9D2C2;
  --line-soft:  #E6E0D2;
  --clay:       #C05B38;
  --clay-deep:  #9F462A;
  --olive:      #5A6048;
  --shadow:     18px 18px 0 rgba(33,28,22,.04);

  --font-display: 'Fraunces', Georgia, serif;
  --font-body:    'Hanken Grotesk', system-ui, sans-serif;
  --font-mono:    'Space Mono', ui-monospace, monospace;

  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

/* grana sottile su tutta la pagina */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: .045;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--clay); color: var(--paper); }

a { color: inherit; text-decoration: none; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ---------- TOP BAR ---------- */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(243,239,230,.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  font-family: var(--font-mono);
  font-size: .82rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  display: flex; align-items: center; gap: .6em;
}
.brand .dot { width: 9px; height: 9px; background: var(--clay); border-radius: 50%; display: inline-block; }
.topnav { display: flex; gap: 28px; }
.topnav a {
  font-size: .82rem; font-weight: 500; color: var(--ink-soft);
  position: relative; transition: color .25s;
}
.topnav a:hover { color: var(--clay); }
.topnav a::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 2px; background: var(--clay); transition: width .25s;
}
.topnav a:hover::after { width: 100%; }
@media (max-width: 760px){ .topnav { display: none; } }

/* ---------- HERO ---------- */
.hero { padding: 96px 0 64px; border-bottom: 1px solid var(--line); position: relative; }
.kicker {
  font-family: var(--font-mono); font-size: .76rem; font-weight: 700;
  letter-spacing: .2em; text-transform: uppercase; color: var(--clay);
  margin-bottom: 28px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 6.5vw, 5.4rem);
  line-height: .98; letter-spacing: -.02em;
  font-variation-settings: 'opsz' 120, 'SOFT' 30;
  max-width: 16ch;
  margin-bottom: 28px;
}
.hero h1 em { font-style: italic; color: var(--clay); font-weight: 500; }
.hero .lead {
  font-size: 1.18rem; color: var(--ink-soft); max-width: 56ch; line-height: 1.55;
}
.stats {
  display: flex; flex-wrap: wrap; gap: 0; margin-top: 56px;
  border: 1px solid var(--line); background: var(--surface);
}
.stat { flex: 1 1 0; min-width: 140px; padding: 24px 28px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat .n { font-family: var(--font-display); font-size: 2.3rem; font-weight: 600; line-height: 1; }
.stat .l { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-faint); margin-top: 8px; }
@media (max-width: 680px){ .stat { flex-basis: 50%; border-bottom: 1px solid var(--line); } }

/* ---------- SECTION ---------- */
.section { padding: 80px 0; border-bottom: 1px solid var(--line); }
.section.alt { background: var(--paper-alt); }
.sec-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 44px; }
.sec-num {
  font-family: var(--font-mono); font-size: .82rem; font-weight: 700;
  color: var(--clay); padding-top: .55em; letter-spacing: .08em;
}
.sec-title { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.7rem, 3.5vw, 2.7rem); letter-spacing: -.015em; line-height: 1.05; }
.sec-sub { color: var(--ink-soft); max-width: 60ch; margin-top: 12px; font-size: 1.02rem; }

/* ---------- CARDS ---------- */
.grid { display: grid; gap: 20px; grid-template-columns: repeat(2, 1fr); }
@media (max-width: 720px){ .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--line);
  padding: 30px 30px 26px; position: relative;
  transition: transform .3s cubic-bezier(.2,.7,.2,1), box-shadow .3s, border-color .3s;
}
.card:hover { transform: translate(-4px,-4px); box-shadow: var(--shadow); border-color: var(--clay); }
.card .idx { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-faint); letter-spacing: .1em; }
.card h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.5rem; margin: 10px 0 10px; letter-spacing: -.01em; }
.card p { color: var(--ink-soft); font-size: .96rem; }
.card .tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.tag {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .04em;
  padding: 4px 9px; border: 1px solid var(--line); border-radius: 100px; color: var(--ink-soft);
}
.card .go {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 20px;
  font-family: var(--font-mono); font-size: .76rem; font-weight: 700; color: var(--clay);
  letter-spacing: .06em; text-transform: uppercase;
}
.card .go .arr { transition: transform .25s; }
.card:hover .go .arr { transform: translateX(5px); }

/* ---------- STARTUP HIGHLIGHT ---------- */
.startup {
  background: var(--ink); color: var(--paper); border: 1px solid var(--ink);
  padding: 48px; display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: center;
}
@media (max-width: 760px){ .startup { grid-template-columns: 1fr; padding: 34px; } }
.startup h3 { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.6rem,3vw,2.3rem); line-height: 1.05; margin-bottom: 16px; }
.startup h3 em { color: #E8916E; font-style: italic; }
.startup p { color: #C9C1B2; font-size: 1rem; }
.startup ul { list-style: none; margin-top: 18px; display: grid; gap: 9px; }
.startup li { font-size: .94rem; color: #DAD3C4; padding-left: 22px; position: relative; }
.startup li::before { content: "→"; position: absolute; left: 0; color: var(--clay); }
.btn {
  display: inline-flex; align-items: center; gap: 9px; margin-top: 26px;
  background: var(--clay); color: var(--paper); padding: 14px 24px;
  font-family: var(--font-mono); font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  transition: background .25s, transform .25s;
}
.btn:hover { background: var(--clay-deep); transform: translateY(-2px); }

/* ---------- ARTICLE LIST ---------- */
.arts { display: grid; gap: 0; border-top: 1px solid var(--line); }
.art {
  display: flex; align-items: center; gap: 22px; padding: 22px 6px;
  border-bottom: 1px solid var(--line); transition: padding-left .25s, background .25s;
}
.art:hover { padding-left: 18px; background: var(--surface); }
.art .a-idx { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-faint); width: 34px; flex-shrink: 0; }
.art .a-body { flex: 1; }
.art .a-title { font-family: var(--font-display); font-size: 1.22rem; font-weight: 600; letter-spacing: -.01em; }
.art .a-desc { color: var(--ink-soft); font-size: .9rem; margin-top: 3px; }
.art .a-flag {
  font-family: var(--font-mono); font-size: .66rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  padding: 5px 10px; border-radius: 100px; flex-shrink: 0;
}
.a-flag.it { background: var(--clay); color: var(--paper); }
.a-flag.en { border: 1px solid var(--line); color: var(--ink-faint); }
@media (max-width: 600px){ .art .a-desc { display: none; } }

/* ---------- PATH ---------- */
.path { display: grid; gap: 0; counter-reset: step; }
.step {
  display: grid; grid-template-columns: 70px 1fr; gap: 24px;
  padding: 26px 0; border-bottom: 1px dashed var(--line); align-items: start;
}
.step:last-child { border-bottom: 0; }
.step .s-n {
  font-family: var(--font-display); font-size: 2.4rem; font-weight: 600; color: var(--clay);
  line-height: 1; font-variation-settings: 'opsz' 120;
}
.step h4 { font-family: var(--font-body); font-weight: 700; font-size: 1.12rem; margin-bottom: 5px; }
.step p { color: var(--ink-soft); font-size: .96rem; }
.step code {
  font-family: var(--font-mono); font-size: .82em; background: var(--paper-alt);
  padding: 2px 6px; border-radius: 4px; border: 1px solid var(--line-soft);
}

/* ---------- FOOTER ---------- */
.foot { padding: 48px 0 64px; }
.foot .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; align-items: center; }
.foot p { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .06em; color: var(--ink-faint); text-transform: uppercase; }

/* ---------- LOAD ANIMATION ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: none; } }
.reveal { opacity: 0; animation: fadeUp .8s cubic-bezier(.2,.7,.2,1) forwards; }
.d1{animation-delay:.05s}.d2{animation-delay:.15s}.d3{animation-delay:.25s}.d4{animation-delay:.35s}.d5{animation-delay:.45s}
@media (prefers-reduced-motion: reduce){ .reveal{ animation: none; opacity: 1; } }

/* ============================================================
   PROSE — pagine articolo tradotte
   ============================================================ */
.article-page { padding-bottom: 100px; }
.art-hero { padding: 80px 0 50px; border-bottom: 1px solid var(--line); }
.art-back { font-family: var(--font-mono); font-size: .76rem; color: var(--clay); letter-spacing: .06em; text-transform: uppercase; }
.art-hero h1 { font-family: var(--font-display); font-weight: 600; font-size: clamp(2.1rem,5vw,3.6rem); line-height: 1.02; letter-spacing: -.02em; margin: 24px 0 18px; max-width: 20ch; }
.art-meta { font-family: var(--font-mono); font-size: .76rem; color: var(--ink-faint); letter-spacing: .05em; }
.art-meta a { color: var(--clay); }
.prose { max-width: 70ch; margin: 0 auto; padding-top: 50px; font-size: 1.08rem; }
.prose > * + * { margin-top: 1.4em; }
.prose h2 { font-family: var(--font-display); font-weight: 600; font-size: 1.9rem; letter-spacing: -.01em; margin-top: 2.2em; padding-top: .4em; border-top: 1px solid var(--line); }
.prose h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.4rem; margin-top: 1.8em; }
.prose p { color: #2C261E; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li + li { margin-top: .5em; }
.prose li { color: #2C261E; }
.prose strong { color: var(--ink); }
.prose em { color: var(--clay-deep); }
.prose blockquote {
  border-left: 3px solid var(--clay); padding: 4px 0 4px 22px; color: var(--ink-soft); font-style: italic;
}
.prose code { font-family: var(--font-mono); font-size: .86em; background: var(--paper-alt); padding: 2px 6px; border-radius: 4px; border: 1px solid var(--line-soft); }
.callout {
  background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--clay);
  padding: 18px 22px; font-size: .98rem;
}
.callout .c-lab { font-family: var(--font-mono); font-size: .7rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--clay); display: block; margin-bottom: 6px; }

/* code blocks + tables nelle pagine articolo */
.prose pre {
  background: var(--ink); color: #ECE6D8; padding: 18px 20px; border-radius: 6px;
  overflow-x: auto; font-family: var(--font-mono); font-size: .82rem; line-height: 1.55;
}
.prose pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.prose .table-wrap { overflow-x: auto; }
.prose table { width: 100%; border-collapse: collapse; font-size: .94rem; }
.prose th, .prose td { text-align: left; padding: 10px 14px; border: 1px solid var(--line); vertical-align: top; }
.prose th { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); background: var(--paper-alt); }
.prose td code { font-size: .82em; }