/* ──────────────────────────────────────────────────────────
   Segnale & Rumore — Casi · stylesheet per i documenti
   coordinato con index.html
   ────────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,400;0,9..144,600;0,9..144,800;1,9..144,400&family=JetBrains+Mono:wght@400;600&display=swap');

:root{
  --ink:#1a1410;
  --ink-soft:#3d332b;
  --paper:#f4ede0;
  --paper-warm:#ebe0cc;
  --accent:#b4361a;
  --accent-soft:#d97757;
  --muted:#8a7a66;
}

*{box-sizing:border-box}

html,body{
  margin:0;padding:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"Fraunces",Georgia,serif;
  font-optical-sizing:auto;
  font-variation-settings:"SOFT" 30;
  -webkit-font-smoothing:antialiased;
}

body{
  background-image:
    radial-gradient(ellipse at 20% 10%, rgba(217,119,87,0.08), transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(180,54,26,0.06), transparent 50%);
  position:relative;
}

body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:100;
  opacity:0.35;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence baseFrequency='0.9' numOctaves='2'/><feColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.08 0 0 0 0 0.05 0 0 0 0.35 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* layout */
main{
  max-width:720px;
  margin:0 auto;
  padding:clamp(1.5rem,4vw,4rem) clamp(1.25rem,4vw,2.5rem);
  position:relative;
  z-index:1;
}

/* nav to home */
.home-link{
  display:inline-block;
  font-family:"JetBrains Mono",monospace;
  font-size:0.7rem;
  text-transform:uppercase;
  letter-spacing:0.14em;
  color:var(--muted);
  text-decoration:none;
  border-bottom:1px solid var(--muted);
  padding-bottom:0.2rem;
  margin-bottom:2.5rem;
  transition:all 0.15s;
}
.home-link:hover{color:var(--accent);border-color:var(--accent)}
.home-link::before{content:"← ";font-family:"Fraunces",serif}

/* headings */
h1{
  font-family:"Fraunces",serif;
  font-variation-settings:"SOFT" 100,"WONK" 1;
  font-weight:300;
  font-size:clamp(1.9rem,5vw,3.2rem);
  line-height:1.05;
  letter-spacing:-0.02em;
  margin:0 0 2rem;
  font-style:italic;
  padding-bottom:1.2rem;
  border-bottom:6px double var(--ink);
}
h1 strong,h1 em{color:var(--accent);font-weight:600;font-style:normal}

h2{
  font-family:"Fraunces",serif;
  font-weight:600;
  font-size:clamp(1.35rem,3vw,1.8rem);
  line-height:1.15;
  letter-spacing:-0.01em;
  margin:3rem 0 1rem;
  padding-top:1rem;
  border-top:1px solid var(--ink);
}

h3{
  font-family:"Fraunces",serif;
  font-weight:600;
  font-size:1.2rem;
  margin:2rem 0 0.7rem;
  font-style:italic;
  color:var(--ink-soft);
}

h4{
  font-family:"JetBrains Mono",monospace;
  font-size:0.75rem;
  text-transform:uppercase;
  letter-spacing:0.12em;
  color:var(--accent);
  margin:1.5rem 0 0.5rem;
  font-weight:600;
}

/* prose */
p{
  font-size:1.08rem;
  line-height:1.65;
  margin:0 0 1.1rem;
  hyphens:auto;
}

p:first-of-type::first-letter{
  font-family:"Fraunces",serif;
  font-weight:800;
  font-size:4.2rem;
  float:left;
  line-height:0.85;
  padding:0.35rem 0.55rem 0 0;
  color:var(--accent);
  font-style:normal;
}

strong{color:var(--ink);font-weight:600}
em{color:var(--ink-soft)}

a{
  color:var(--accent);
  text-decoration:underline;
  text-decoration-thickness:1px;
  text-underline-offset:3px;
}
a:hover{
  background:var(--accent);
  color:var(--paper);
  text-decoration:none;
}

/* lists */
ul,ol{
  padding-left:1.4rem;
  margin:1rem 0 1.4rem;
}
li{
  font-size:1.05rem;
  line-height:1.6;
  margin-bottom:0.5rem;
  padding-left:0.3rem;
}
ul li::marker{color:var(--accent)}
ol li::marker{color:var(--accent);font-family:"JetBrains Mono",monospace;font-size:0.85rem;font-weight:600}

/* blockquote */
blockquote{
  font-family:"Fraunces",serif;
  font-style:italic;
  font-weight:300;
  font-size:1.25rem;
  line-height:1.4;
  color:var(--ink-soft);
  margin:2rem 0;
  padding:0.5rem 0 0.5rem 1.5rem;
  border-left:4px solid var(--accent);
}

/* code (inline) */
code{
  font-family:"JetBrains Mono",monospace;
  font-size:0.88em;
  background:var(--paper-warm);
  padding:0.1rem 0.35rem;
  border-radius:3px;
  color:var(--ink);
}

/* pre blocks */
pre{
  background:var(--paper-warm);
  border:1px solid var(--muted);
  border-left:4px solid var(--accent);
  padding:1rem 1.2rem;
  overflow-x:auto;
  font-size:0.85rem;
  line-height:1.5;
  margin:1.5rem 0;
}
pre code{background:none;padding:0}

/* images */
img{
  max-width:100%;
  height:auto;
  display:block;
  margin:2rem auto;
  border:1px solid var(--muted);
  background:var(--paper-warm);
  padding:0.5rem;
}

/* horizontal rule */
hr{
  border:none;
  height:1px;
  background:var(--ink);
  margin:3rem auto;
  width:40%;
  position:relative;
}
hr::after{
  content:"§";
  position:absolute;
  top:-0.8rem;
  left:50%;
  transform:translateX(-50%);
  background:var(--paper);
  padding:0 0.8rem;
  font-family:"Fraunces",serif;
  color:var(--accent);
  font-size:1.2rem;
}

/* tables */
table{
  border-collapse:collapse;
  width:100%;
  margin:1.5rem 0;
  font-size:0.95rem;
}
th,td{
  padding:0.6rem 0.8rem;
  text-align:left;
  border-bottom:1px solid var(--muted);
}
th{
  font-family:"JetBrains Mono",monospace;
  font-size:0.72rem;
  text-transform:uppercase;
  letter-spacing:0.1em;
  color:var(--accent);
  border-bottom:2px solid var(--ink);
}

/* references section — Pandoc wraps footnotes/references in specific divs */
.references,#refs{
  margin-top:3rem;
  padding-top:1.5rem;
  border-top:1px solid var(--ink);
  font-size:0.92rem;
}
.references p,#refs p{font-size:0.92rem;line-height:1.55}

/* footer */
.colophon{
  margin-top:5rem;
  padding-top:2rem;
  border-top:6px double var(--ink);
  font-family:"JetBrains Mono",monospace;
  font-size:0.7rem;
  text-transform:uppercase;
  letter-spacing:0.1em;
  color:var(--muted);
  line-height:1.8;
  text-align:center;
}

@media (max-width:520px){
  p:first-of-type::first-letter{font-size:3.4rem}
  blockquote{font-size:1.1rem;padding-left:1.2rem}
}