/* =========================================================
   Dialettica.net — Corso Cybersecurity
   Foglio di stile condiviso
   ========================================================= */

/* ---- Token ---- */
:root{
  --bg:        #0d1626;
  --bg-soft:   #101b2e;
  --panel:     #141f33;
  --panel-2:   #1a273e;
  --line:      #25334c;
  --line-soft: #1d2a40;

  --txt:       #e8eef7;
  --txt-dim:   #9fb0c7;
  --txt-faint: #6b7c96;

  /* brand */
  --cyan:    #1ba7e0;
  --magenta: #e5197f;
  --lime:    #9dc23a;
  --amber:   #f5a623;
  --violet:  #7c5ce6;
  --white:   #e8eef7;

  --accent: var(--cyan);   /* sovrascritto per pagina via [data-accent] */
  --accent-ink: #06121f;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 18px 40px -22px rgba(0,0,0,.7);

  --sidebar-w: 290px;
  --maxw: 980px;

  --f-display: "Sora", system-ui, sans-serif;
  --f-body: "Inter", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
}

/* per-pagina accenti */
[data-accent="cyan"]    { --accent:#1ba7e0; }
[data-accent="magenta"] { --accent:#e5197f; }
[data-accent="lime"]    { --accent:#9dc23a; }
[data-accent="amber"]   { --accent:#f5a623; }
[data-accent="violet"]  { --accent:#7c5ce6; }
[data-accent="brand"]   { --accent:#1ba7e0; }

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:
    radial-gradient(1100px 600px at 78% -8%, #14233b 0%, transparent 60%),
    radial-gradient(900px 500px at -5% 110%, #11203a 0%, transparent 55%),
    var(--bg);
  color:var(--txt);
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
}

a{ color:var(--accent); text-decoration:none; }
a:hover{ text-decoration:underline; }

/* =========================================================
   Layout
   ========================================================= */
.layout{ display:flex; min-height:100vh; }

/* ---- Sidebar ---- */
.sidebar{
  width:var(--sidebar-w);
  flex:0 0 var(--sidebar-w);
  position:sticky; top:0; align-self:flex-start;
  height:100vh;
  background:linear-gradient(180deg, #0f1a2c 0%, #0b1322 100%);
  border-right:1px solid var(--line);
  display:flex; flex-direction:column;
  padding:22px 18px 16px;
  overflow-y:auto;
}

.brand{
  display:block; padding:6px 6px 18px;
  border-bottom:1px solid var(--line-soft);
  margin-bottom:16px;
}
.brand img{ width:100%; height:auto; display:block; }
.brand .kicker{
  margin-top:12px;
  font-family:var(--f-mono);
  font-size:10.5px; letter-spacing:.22em; text-transform:uppercase;
  color:var(--txt-faint);
}
/* nastro firma */
.ribbon{
  height:6px; width:100%; border-radius:6px; margin-top:12px;
  background:linear-gradient(90deg,
    var(--cyan) 0 33%, var(--magenta) 33% 66%, var(--lime) 66% 100%);
  transform:skewX(-18deg);
}

.nav{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:3px; }
.nav__title{
  font-family:var(--f-mono); font-size:10px; letter-spacing:.2em;
  text-transform:uppercase; color:var(--txt-faint);
  padding:10px 10px 6px;
}
.nav a{
  display:flex; align-items:center; gap:11px;
  padding:9px 11px; border-radius:var(--radius-sm);
  color:var(--txt-dim); font-size:14px; font-weight:500;
  line-height:1.25; text-decoration:none;
  transition:background .15s, color .15s;
}
.nav a .dot{
  width:9px; height:9px; border-radius:50%; flex:0 0 9px;
  background:var(--ndot, var(--txt-faint));
  box-shadow:0 0 0 0 transparent; transition:box-shadow .2s;
}
.nav a:hover{ background:#162234; color:var(--txt); text-decoration:none; }
.nav a.active{
  background:#172741; color:#fff; font-weight:600;
}
.nav a.active .dot{ box-shadow:0 0 0 4px color-mix(in srgb, var(--ndot) 25%, transparent); }
.nav a .num{ font-family:var(--f-mono); font-size:11px; color:var(--txt-faint); }
.nav a.active .num{ color:var(--ndot); }

/* ---- Misuratore di profondità (signature) ---- */
.depth{
  margin-top:auto; padding-top:18px;
  border-top:1px solid var(--line-soft);
}
.depth__head{
  display:flex; align-items:center; justify-content:space-between;
  font-family:var(--f-mono); font-size:10px; letter-spacing:.18em;
  text-transform:uppercase; color:var(--txt-faint); margin-bottom:10px;
}
.depth__val{ color:var(--accent); font-weight:700; }
.depth__track{ display:flex; gap:8px; }
.depth__seg{
  flex:1; cursor:pointer; border:none; padding:0;
  background:transparent; text-align:center;
}
.depth__bar{
  height:7px; border-radius:6px; background:#1c2840;
  border:1px solid var(--line); transition:background .2s, border-color .2s;
}
.depth__seg.on .depth__bar{ background:var(--accent); border-color:var(--accent); }
.depth__name{
  display:block; margin-top:7px;
  font-size:11px; color:var(--txt-faint); font-weight:600; transition:color .2s;
}
.depth__seg.on .depth__name{ color:var(--txt); }
.depth__hint{
  margin-top:11px; font-size:11.5px; color:var(--txt-faint); line-height:1.45;
}

/* ---- Contenuto ---- */
.main{ flex:1 1 auto; min-width:0; }
.wrap{ max-width:var(--maxw); margin:0 auto; padding:46px 48px 90px; }

.page-head{ margin-bottom:34px; }
.eyebrow{
  font-family:var(--f-mono); font-size:11px; letter-spacing:.2em;
  text-transform:uppercase; color:var(--accent); margin:0 0 10px;
}
h1{
  font-family:var(--f-display); font-weight:700;
  font-size:clamp(28px, 4.2vw, 44px); line-height:1.08; margin:0 0 14px;
  letter-spacing:-.01em;
}
h1 .accentbar{
  display:block; width:64px; height:5px; border-radius:5px;
  background:var(--accent); margin-top:18px;
}
.lede{ font-size:18px; color:var(--txt-dim); max-width:64ch; margin:0; }

h2{
  font-family:var(--f-display); font-weight:600;
  font-size:24px; margin:42px 0 14px; letter-spacing:-.01em;
  display:flex; align-items:baseline; gap:12px;
}
h2::before{
  content:""; width:14px; height:14px; border-radius:4px;
  background:var(--accent); transform:skewX(-18deg); flex:0 0 14px;
  align-self:center;
}
h3{ font-family:var(--f-display); font-weight:600; font-size:18px; margin:26px 0 8px; }
p{ margin:0 0 14px; }
strong{ color:#fff; font-weight:650; }
ul,ol{ margin:0 0 16px; padding-left:22px; }
li{ margin:6px 0; }
code{
  font-family:var(--f-mono); font-size:.88em;
  background:#0c1626; border:1px solid var(--line);
  padding:1px 6px; border-radius:6px; color:var(--accent);
}

/* ---- Componenti ---- */
.card{
  background:var(--panel); border:1px solid var(--line);
  border-radius:var(--radius); padding:22px 24px; margin:18px 0;
  box-shadow:var(--shadow);
}
.grid{ display:grid; gap:16px; }
.grid.two{ grid-template-columns:1fr 1fr; }
.grid.three{ grid-template-columns:repeat(3,1fr); }

.callout{
  border-left:4px solid var(--accent);
  background:linear-gradient(90deg, color-mix(in srgb, var(--accent) 12%, transparent), transparent 80%);
  padding:14px 18px; border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  margin:18px 0;
}
.callout.warn{ --accent:var(--amber); }
.callout.danger{ --accent:var(--magenta); }
.callout.ok{ --accent:var(--lime); }
.callout .tag{
  font-family:var(--f-mono); font-size:10.5px; letter-spacing:.15em;
  text-transform:uppercase; color:var(--accent); display:block; margin-bottom:4px; font-weight:700;
}

.chips{ display:flex; flex-wrap:wrap; gap:9px; margin:14px 0; }
.chip{
  font-family:var(--f-mono); font-size:12.5px;
  background:#0e1a2c; border:1px solid var(--line);
  padding:6px 12px; border-radius:999px; color:var(--txt-dim);
}
.chip b{ color:var(--accent); }

.do-dont{ display:grid; grid-template-columns:1fr 1fr; gap:16px; margin:18px 0; }
.do-dont .col{ border-radius:var(--radius); padding:18px 20px; border:1px solid var(--line); }
.do-dont .do{ background:color-mix(in srgb, var(--lime) 9%, var(--panel)); border-color:color-mix(in srgb,var(--lime) 35%, var(--line)); }
.do-dont .dont{ background:color-mix(in srgb, var(--magenta) 9%, var(--panel)); border-color:color-mix(in srgb,var(--magenta) 35%, var(--line)); }
.do-dont h4{ margin:0 0 10px; font-family:var(--f-display); font-size:15px; display:flex; align-items:center; gap:8px; }
.do-dont .do h4{ color:var(--lime); }
.do-dont .dont h4{ color:var(--magenta); }
.do-dont ul{ margin:0; padding-left:18px; }
.do-dont li{ font-size:14.5px; }

.figure{ margin:22px 0; }
.figure svg{ width:100%; height:auto; display:block;
  background:#0b1322; border:1px solid var(--line); border-radius:var(--radius); }
.figure figcaption{
  margin-top:10px; font-size:13px; color:var(--txt-faint);
  font-family:var(--f-mono); letter-spacing:.02em;
}

.steps{ counter-reset:s; list-style:none; padding:0; margin:18px 0; }
.steps li{ position:relative; padding:4px 0 16px 46px; border-left:2px solid var(--line); margin-left:16px; }
.steps li::before{
  counter-increment:s; content:counter(s);
  position:absolute; left:-17px; top:0;
  width:32px; height:32px; border-radius:50%;
  background:var(--panel-2); border:2px solid var(--accent); color:var(--accent);
  font-family:var(--f-mono); font-weight:700; font-size:14px;
  display:flex; align-items:center; justify-content:center;
}
.steps li:last-child{ border-left-color:transparent; }

.kv{ width:100%; border-collapse:collapse; margin:16px 0; font-size:14.5px; }
.kv th,.kv td{ text-align:left; padding:10px 12px; border-bottom:1px solid var(--line-soft); vertical-align:top; }
.kv th{ color:var(--txt-faint); font-family:var(--f-mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase; font-weight:600; }
.kv td:first-child{ font-family:var(--f-mono); color:var(--accent); white-space:nowrap; }

/* ---- Livelli di profondità ---- */
[data-min-level="2"], [data-min-level="3"]{ display:none; }
body[data-level="2"] [data-min-level="2"]{ display:revert; }
body[data-level="3"] [data-min-level="2"],
body[data-level="3"] [data-min-level="3"]{ display:revert; }

.lvl-flag{
  display:inline-flex; align-items:center; gap:7px;
  font-family:var(--f-mono); font-size:10.5px; letter-spacing:.14em;
  text-transform:uppercase; font-weight:700;
  padding:4px 10px; border-radius:999px; margin:26px 0 2px;
}
.lvl-flag[data-l="2"]{ color:var(--amber); background:color-mix(in srgb,var(--amber) 14%, transparent); }
.lvl-flag[data-l="3"]{ color:var(--violet); background:color-mix(in srgb,var(--violet) 16%, transparent); }
.lvl-flag::before{ content:""; width:7px; height:7px; border-radius:50%; background:currentColor; }

.reveal{ animation:reveal .4s ease both; }
@keyframes reveal{ from{ opacity:0; transform:translateY(8px);} to{ opacity:1; transform:none;} }

/* ---- Footer / paginazione ---- */
.pager{ display:flex; justify-content:space-between; gap:14px; margin-top:54px;
  padding-top:22px; border-top:1px solid var(--line); }
.pager a{ color:var(--txt-dim); font-size:14px; }
.pager a span{ display:block; font-family:var(--f-mono); font-size:10px;
  letter-spacing:.18em; text-transform:uppercase; color:var(--txt-faint); }
.pager a:hover{ color:#fff; text-decoration:none; }
.pager a:hover span{ color:var(--accent); }

/* ---- Topbar mobile ---- */
.topbar{ display:none; }

/* =========================================================
   Home / programma
   ========================================================= */
.hero{ position:relative; padding:8px 0 8px; }
.session-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:16px; margin:26px 0; }
.s-card{
  display:block; background:var(--panel); border:1px solid var(--line);
  border-radius:var(--radius); padding:20px 22px; text-decoration:none; color:inherit;
  border-top:3px solid var(--sc, var(--accent)); transition:transform .15s, border-color .15s, background .15s;
}
.s-card:hover{ transform:translateY(-3px); background:var(--panel-2); text-decoration:none; }
.s-card .n{ font-family:var(--f-mono); font-size:12px; color:var(--sc); letter-spacing:.1em; }
.s-card h3{ margin:6px 0 8px; font-size:18px; color:#fff; }
.s-card p{ margin:0; font-size:14px; color:var(--txt-dim); }
.s-card .meta{ margin-top:12px; font-family:var(--f-mono); font-size:11px; color:var(--txt-faint); }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 880px){
  .layout{ flex-direction:column; }
  .topbar{
    display:flex; align-items:center; gap:12px; position:sticky; top:0; z-index:30;
    background:#0b1322; border-bottom:1px solid var(--line); padding:10px 16px;
  }
  .topbar img{ height:30px; width:auto; }
  .topbar .ribbon{ display:none; }
  .topbar button{
    margin-left:auto; background:var(--panel-2); color:var(--txt);
    border:1px solid var(--line); border-radius:9px; padding:8px 12px;
    font-size:18px; line-height:1; cursor:pointer;
  }
  .sidebar{
    position:fixed; top:0; left:0; height:100vh; z-index:40;
    transform:translateX(-100%); transition:transform .25s ease;
    box-shadow:0 0 60px rgba(0,0,0,.6);
  }
  .sidebar.open{ transform:none; }
  .wrap{ padding:26px 20px 70px; }
  .grid.two,.grid.three,.session-grid,.do-dont{ grid-template-columns:1fr; }
  .scrim{ display:none; position:fixed; inset:0; background:rgba(0,0,0,.55); z-index:35; }
  .scrim.show{ display:block; }
}

@media print{
  .sidebar,.topbar,.pager,.depth{ display:none !important; }
  body{ background:#fff; color:#111; }
  .card,.figure svg{ box-shadow:none; }
  [data-min-level]{ display:revert !important; }
}

/* accessibilità */
:focus-visible{ outline:2px solid var(--accent); outline-offset:3px; border-radius:4px; }
@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; scroll-behavior:auto; }
}