/* ============================================================
   CORSO GREP — Foglio di stile condiviso
   Tipografia: JetBrains Mono + Newsreader
   Palette: dark editoriale con accenti ambra
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&family=Newsreader:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&display=swap');

:root{
  --bg:#0d0d0c;
  --bg-elev:#161513;
  --bg-card:#1a1917;
  --bg-term:#0a0907;
  --line:#2a2824;
  --line-soft:#1f1d1a;
  --ink:#ece6d4;
  --ink-dim:#9a9384;
  --ink-faint:#5e584d;
  --amber:#ffb000;
  --amber-soft:#3a2a00;
  --amber-glow:rgba(255,176,0,.15);
  --green:#7bbf5a;
  --red:#e25c4a;
  --magenta:#d97aac;
  --cyan:#5fb3b3;
  --match-bg:#3a2a00;
  --match-fg:#ffe28a;
  --mono:'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --serif:'Newsreader', Georgia, serif;
  --r-sm:4px;
  --r-md:8px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--serif);
  font-size:18px;
  line-height:1.65;
  font-feature-settings:"liga","kern";
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  min-height:100vh;
}

/* Grana sottile a schermo intero */
body::before{
  content:"";
  position:fixed;inset:0;
  pointer-events:none;
  opacity:.035;
  z-index:100;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

a{color:var(--amber);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s, color .2s}
a:hover{border-bottom-color:var(--amber)}

/* ============ TOPBAR ============ */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(13,13,12,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  padding:14px 32px;
  display:flex;align-items:center;justify-content:space-between;
  font-family:var(--mono);
  font-size:13px;
}
.topbar .brand{
  color:var(--ink);
  font-weight:700;
  letter-spacing:.02em;
}
.topbar .brand .dollar{color:var(--amber);margin-right:6px}
.topbar nav{display:flex;gap:22px;align-items:center}
.topbar nav a{
  color:var(--ink-dim);
  border-bottom:none;
  transition:color .2s;
}
.topbar nav a:hover{color:var(--amber)}
.topbar nav a.current{color:var(--amber)}

/* ============ HERO INDICE ============ */
.hero{
  max-width:1100px;
  margin:0 auto;
  padding:120px 32px 80px;
  position:relative;
}
.hero .kicker{
  font-family:var(--mono);
  font-size:13px;
  color:var(--amber);
  letter-spacing:.18em;
  text-transform:uppercase;
  margin-bottom:24px;
}
.hero h1{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(56px,9vw,128px);
  line-height:.95;
  letter-spacing:-.03em;
  margin-bottom:24px;
}
.hero h1 .match{
  background:var(--match-bg);
  color:var(--match-fg);
  padding:0 .12em;
  border-radius:3px;
}
.hero h1 em{
  font-style:italic;
  color:var(--ink-dim);
  font-weight:400;
}
.hero .sub{
  font-size:22px;
  max-width:680px;
  color:var(--ink-dim);
  margin-bottom:48px;
  line-height:1.5;
}
.hero .sub em{color:var(--ink);font-style:italic}

.hero-meta{
  display:flex;gap:48px;flex-wrap:wrap;
  font-family:var(--mono);font-size:13px;
  border-top:1px solid var(--line);
  padding-top:24px;
  color:var(--ink-faint);
}
.hero-meta div span{display:block;color:var(--ink);margin-top:4px;font-size:14px}

/* ============ INDICE LEZIONI ============ */
.lessons{
  max-width:1100px;
  margin:0 auto;
  padding:40px 32px 120px;
}
.lessons-title{
  font-family:var(--mono);
  font-size:13px;
  color:var(--ink-faint);
  letter-spacing:.18em;
  text-transform:uppercase;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
  margin-bottom:8px;
}
.lesson-card{
  display:grid;
  grid-template-columns:80px 1fr auto;
  gap:32px;
  align-items:start;
  padding:28px 8px;
  border-bottom:1px solid var(--line-soft);
  transition:background .25s, padding .25s;
  border-radius:0;
}
.lesson-card:hover{
  background:rgba(255,176,0,.03);
  padding-left:16px;
}
.lesson-card a{
  display:contents;
  color:var(--ink);
  border:none;
}
.lesson-card .num{
  font-family:var(--mono);
  font-size:42px;
  color:var(--amber);
  font-weight:700;
  line-height:1;
  letter-spacing:-.02em;
}
.lesson-card .body h3{
  font-family:var(--serif);
  font-weight:600;
  font-size:28px;
  line-height:1.2;
  margin-bottom:6px;
  letter-spacing:-.01em;
}
.lesson-card .body p{
  color:var(--ink-dim);
  font-size:17px;
  line-height:1.5;
}
.lesson-card .arrow{
  font-family:var(--mono);
  color:var(--ink-faint);
  align-self:center;
  font-size:20px;
  transition:transform .25s, color .25s;
}
.lesson-card:hover .arrow{transform:translateX(6px);color:var(--amber)}

/* ============ PAGINA LEZIONE ============ */
.lesson-wrap{
  max-width:840px;
  margin:0 auto;
  padding:80px 32px 120px;
}
.lesson-head{
  border-bottom:1px solid var(--line);
  padding-bottom:32px;
  margin-bottom:48px;
}
.lesson-head .crumb{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:16px;
}
.lesson-head h1{
  font-family:var(--serif);
  font-weight:600;
  font-size:clamp(38px,5.5vw,64px);
  line-height:1.05;
  letter-spacing:-.02em;
  margin-bottom:18px;
}
.lesson-head .lead{
  font-size:21px;
  color:var(--ink-dim);
  line-height:1.55;
  max-width:680px;
}
.lesson-head .lead em{color:var(--ink);font-style:italic}

/* Blocchi: teoria / pratica / trucco */
.block{
  margin:48px 0;
}
.block-label{
  display:inline-block;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.22em;
  text-transform:uppercase;
  padding:4px 10px;
  border-radius:var(--r-sm);
  margin-bottom:18px;
}
.block-label.teoria{background:var(--amber-soft);color:var(--amber)}
.block-label.pratica{background:rgba(123,191,90,.12);color:var(--green)}
.block-label.trucco{background:rgba(217,122,172,.12);color:var(--magenta)}

.block h2{
  font-family:var(--serif);
  font-weight:600;
  font-size:34px;
  line-height:1.15;
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.block p{
  margin-bottom:18px;
  font-size:18px;
  line-height:1.7;
}
.block p em{font-style:italic;color:var(--ink)}
.block ul,.block ol{
  margin:18px 0 24px 22px;
  font-size:18px;
  line-height:1.65;
}
.block li{margin-bottom:8px}
.block li code{color:var(--amber)}

code{
  font-family:var(--mono);
  font-size:.88em;
  background:var(--bg-elev);
  padding:1px 6px;
  border-radius:3px;
  color:var(--amber);
  border:1px solid var(--line-soft);
}

/* Terminale */
.terminal{
  background:var(--bg-term);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin:20px 0 28px;
  font-family:var(--mono);
  font-size:14px;
  overflow:hidden;
  box-shadow:0 8px 24px rgba(0,0,0,.4);
}
.terminal-head{
  background:var(--bg-elev);
  border-bottom:1px solid var(--line);
  padding:8px 14px;
  font-size:11px;
  color:var(--ink-faint);
  letter-spacing:.06em;
  display:flex;justify-content:space-between;align-items:center;
}
.terminal-head .dots{display:inline-flex;gap:6px;margin-right:12px}
.terminal-head .dots span{
  width:10px;height:10px;border-radius:50%;
  background:#3a3a3a;display:inline-block;
}
.terminal-head .title{flex:1;text-align:center;font-style:italic}
.terminal-body{padding:18px 20px;line-height:1.6;color:var(--ink)}
.terminal-body .prompt{color:var(--amber);user-select:none}
.terminal-body .comment{color:var(--ink-faint);font-style:italic}
.terminal-body .out{color:var(--ink-dim)}
.terminal-body .ok{color:var(--green)}
.terminal-body .err{color:var(--red)}
.terminal-body .key{color:var(--cyan)}
.terminal-body .match{
  background:var(--match-bg);
  color:var(--match-fg);
  padding:0 2px;
  border-radius:2px;
  font-weight:500;
}
.terminal-body pre{
  margin:0;
  white-space:pre-wrap;
  word-break:break-word;
}

/* Riquadri di approfondimento */
.callout{
  border-left:3px solid var(--amber);
  background:rgba(255,176,0,.05);
  padding:14px 18px;
  margin:22px 0;
  font-size:17px;
  border-radius:0 var(--r-sm) var(--r-sm) 0;
}
.callout strong{color:var(--amber)}

/* Tabella confronti */
.cmp{
  width:100%;
  border-collapse:collapse;
  margin:20px 0;
  font-family:var(--mono);
  font-size:14px;
}
.cmp th,.cmp td{
  text-align:left;
  padding:10px 14px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.cmp th{
  color:var(--amber);
  font-weight:600;
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.cmp td:first-child{color:var(--cyan)}

/* Navigazione tra lezioni */
.lesson-nav{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin-top:64px;
  padding-top:32px;
  border-top:1px solid var(--line);
}
.lesson-nav a{
  border:1px solid var(--line);
  padding:16px 20px;
  border-radius:var(--r-md);
  display:block;
  transition:background .2s, border-color .2s;
  font-family:var(--mono);
  font-size:13px;
  color:var(--ink-dim);
  border-bottom:1px solid var(--line);
}
.lesson-nav a:hover{
  background:rgba(255,176,0,.04);
  border-color:var(--amber);
}
.lesson-nav .label{
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ink-faint);
  margin-bottom:6px;
}
.lesson-nav .title{
  color:var(--ink);
  font-family:var(--serif);
  font-size:18px;
  font-weight:500;
  font-style:italic;
}
.lesson-nav .next{text-align:right}
.lesson-nav .placeholder{opacity:.35;pointer-events:none}

/* Footer */
.footer{
  border-top:1px solid var(--line);
  padding:32px 32px 48px;
  margin-top:80px;
  font-family:var(--mono);
  font-size:12px;
  color:var(--ink-faint);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;
  max-width:1100px;
  margin-left:auto;margin-right:auto;
}

@media (max-width:680px){
  .topbar{padding:12px 18px;flex-direction:column;gap:10px}
  .topbar nav{gap:14px;font-size:12px}
  .hero{padding:64px 22px 56px}
  .lessons{padding:24px 22px 80px}
  .lesson-card{grid-template-columns:48px 1fr;gap:18px;padding:22px 4px}
  .lesson-card .arrow{display:none}
  .lesson-card .num{font-size:30px}
  .lesson-card .body h3{font-size:22px}
  .lesson-wrap{padding:48px 22px 80px}
  .lesson-nav{grid-template-columns:1fr}
  .lesson-nav .next{text-align:left}
  .terminal-body{font-size:13px;padding:14px}
}