/* Palette accento: valori per tema scuro (d) e chiaro (l) */
:root{--a-dark:#4cc9b0;--a-light:#0b7a68}
:root[data-accent="blue"]{--a-dark:#7aa2f7;--a-light:#3a5bd9}
:root[data-accent="violet"]{--a-dark:#b392f0;--a-light:#6f42c1}
:root[data-accent="amber"]{--a-dark:#f2b84b;--a-light:#b45309}
:root[data-accent="rose"]{--a-dark:#f47c9a;--a-light:#c2255c}

/* Tema scuro (predefinito) */
:root{
  --bg:#0d1117; --panel:#161b22; --line:#262d38; --text:#e6edf3; --muted:#8b98a8;
  --accent:var(--a-dark); --on-accent:#0d1117; color-scheme:dark;
}
/* Tema chiaro: automatico se il sistema lo chiede e non è stato scelto altro */
@media (prefers-color-scheme: light){
  :root:not([data-mode]){
    --bg:#f6f8fa; --panel:#ffffff; --line:#d8dee4; --text:#1f2328; --muted:#59636e;
    --accent:var(--a-light); --on-accent:#ffffff; color-scheme:light;
  }
}
:root[data-mode="light"]{
  --bg:#f6f8fa; --panel:#ffffff; --line:#d8dee4; --text:#1f2328; --muted:#59636e;
  --accent:var(--a-light); --on-accent:#ffffff; color-scheme:light;
}
:root[data-mode="dark"]{
  --bg:#0d1117; --panel:#161b22; --line:#262d38; --text:#e6edf3; --muted:#8b98a8;
  --accent:var(--a-dark); --on-accent:#0d1117; color-scheme:dark;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}

header.top{position:sticky;top:0;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:5}
header.top .wrap{display:flex;justify-content:space-between;align-items:center;height:56px}
.logo{font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:600;color:var(--text)}
.logo span{color:var(--accent)}
nav a{margin-left:18px;color:var(--muted);font-size:.92rem}
nav a:hover,nav a.active{color:var(--text);text-decoration:none}

.hero{padding:88px 0 56px}
.hero.small{padding:64px 0 40px}
.tag{font-family:ui-monospace,Menlo,Consolas,monospace;color:var(--accent);font-size:.9rem;margin-bottom:14px}
h1{font-size:clamp(2.2rem,6vw,3.4rem);line-height:1.1;letter-spacing:-.02em}
.role{margin-top:12px;font-size:1.15rem;color:var(--muted);max-width:60ch}
.role b{color:var(--text);font-weight:600}
.cta{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.btn{padding:10px 18px;border-radius:8px;border:1px solid var(--line);color:var(--text);font-weight:500;font-size:.95rem}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.btn:hover{text-decoration:none;filter:brightness(1.1)}

section{padding:44px 0;border-top:1px solid var(--line)}
h2{font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-family:ui-monospace,Menlo,Consolas,monospace;margin-bottom:22px}
p.lead{font-size:1.05rem;max-width:66ch}
p.lead + p.lead{margin-top:14px}

.skills{display:flex;flex-wrap:wrap;gap:10px}
.chip{background:var(--panel);border:1px solid var(--line);padding:8px 14px;border-radius:999px;font-size:.92rem}

.item{position:relative;padding-left:22px;margin-bottom:26px;border-left:2px solid var(--line)}
.item::before{content:"";position:absolute;left:-6px;top:8px;width:10px;height:10px;border-radius:50%;background:var(--accent)}
.item h3{font-size:1.05rem}
.item .meta{color:var(--muted);font-size:.9rem}
.item p{margin-top:6px;color:var(--muted)}

.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}
.card h3{font-size:1rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.93rem}
.card ul{list-style:none;color:var(--muted);font-size:.93rem}
.card li{padding:3px 0}
.card li::before{content:"› ";color:var(--accent)}
.card.link{display:block;color:var(--text)}
.card.link:hover{text-decoration:none;border-color:var(--accent)}
.card .more{display:inline-block;margin-top:10px;color:var(--accent);font-size:.92rem}

.kv{display:grid;gap:10px}
.kv div{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 16px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.kv span{color:var(--muted)}

.contact{display:grid;gap:10px}
.contact div{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 16px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.contact span{color:var(--muted)}

pre.diagram{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;overflow-x:auto;font:.85rem/1.5 ui-monospace,Menlo,Consolas,monospace;color:var(--muted)}

footer{padding:32px 0 48px;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}
@media (max-width:520px){nav a{margin-left:12px}}

/* ---------- Movimento (rispetta prefers-reduced-motion) ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes blink{50%{opacity:0}}

.hero > *{animation:fadeUp .7s cubic-bezier(.2,.7,.2,1) both}
.hero > *:nth-child(2){animation-delay:.08s}
.hero > *:nth-child(3){animation-delay:.16s}
.hero > *:nth-child(4){animation-delay:.24s}

.js .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1)}
.js .reveal.in{opacity:1;transform:none}

.caret{display:inline-block;width:.55em;height:1em;margin-left:2px;vertical-align:-.12em;background:var(--accent);animation:blink 1s steps(1) infinite}

.btn,.chip,.card,.contact div,.kv div{transition:transform .2s ease,border-color .2s ease,filter .2s ease}
.btn:hover{transform:translateY(-2px)}
.chip:hover{border-color:var(--accent);transform:translateY(-2px)}
.card:hover{border-color:var(--accent);transform:translateY(-3px)}
.contact div:hover,.kv div:hover{border-color:var(--accent)}
.item::before{transition:transform .25s ease}
.item:hover::before{transform:scale(1.35)}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .js .reveal{opacity:1;transform:none}
}

/* ---------- Selettore lingua ---------- */
header.top .wrap{flex-wrap:wrap;gap:4px 12px}
header.top .right{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.lang{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.78rem}
.lang a{padding:3px 10px;color:var(--muted);margin:0}
.lang a:hover{color:var(--text);text-decoration:none}
.lang a[aria-current="true"]{background:var(--accent);color:var(--on-accent);font-weight:600}
@media (max-width:520px){header.top .wrap{padding-top:8px;padding-bottom:8px;height:auto}}

/* ---------- Selettore tema ---------- */
.theme{position:relative;display:none}
.js .theme{display:block}
.theme .toggle{display:flex;align-items:center;justify-content:center;height:26px;width:30px;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--text);cursor:pointer;font-size:.95rem;line-height:1}
.theme .toggle:hover,.theme .toggle[aria-expanded="true"]{border-color:var(--accent)}
.theme .panel{position:absolute;right:0;top:calc(100% + 10px);z-index:20;min-width:210px;padding:14px;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 32px rgba(0,0,0,.28)}
.theme .panel[hidden]{display:none}
.theme .lbl{display:block;margin-bottom:8px;color:var(--muted);font:.72rem ui-monospace,Menlo,Consolas,monospace;letter-spacing:.1em;text-transform:uppercase}
.theme .row{display:flex;gap:10px;margin-bottom:14px}
.theme .row:last-child{margin-bottom:0}
.theme .sw{width:24px;height:24px;border-radius:50%;border:0;cursor:pointer;padding:0;outline-offset:3px;background-origin:border-box;background-clip:border-box}
.theme .sw[aria-pressed="true"]{box-shadow:0 0 0 2px var(--panel),0 0 0 4px var(--text)}
.theme .seg{display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;width:100%}
.theme .seg button{flex:1;padding:5px 0;border:0;background:transparent;color:var(--muted);font:.82rem system-ui,sans-serif;cursor:pointer}
.theme .seg button[aria-pressed="true"]{background:var(--accent);color:var(--on-accent);font-weight:600}
@media (max-width:520px){.theme .panel{right:auto;left:0}}