/* =========================================================
   Simone Dall'Asta — Portfolio
   Design system + layout. Vanilla CSS, mobile-first.
   Font: stack di sistema (nessuna richiesta esterna → privacy-safe).
   ========================================================= */

:root {
  /* Palette */
  --bg: #0b0f1a;
  --bg-soft: #111726;
  --surface: #161d2e;
  --surface-2: #1c2438;
  --border: #273149;
  --text: #e8ecf5;
  --text-muted: #9aa6bf;
  --text-dim: #6b768f;

  /* Accent gradient */
  --accent-1: #6366f1; /* indigo */
  --accent-2: #06b6d4; /* cyan   */
  --accent-3: #a855f7; /* violet */
  --accent-grad: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  --accent-grad-soft: linear-gradient(135deg, rgba(99,102,241,.15), rgba(6,182,212,.15));

  /* Misure */
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1100px;
  --gutter: clamp(1.1rem, 4vw, 2rem);

  --shadow: 0 10px 40px -12px rgba(0, 0, 0, .55);
  --shadow-glow: 0 0 60px -10px rgba(99, 102, 241, .45);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, "Apple Color Emoji", "Segoe UI Emoji", sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fc;
    --bg-soft: #ffffff;
    --surface: #ffffff;
    --surface-2: #f1f3fa;
    --border: #e2e6f0;
    --text: #131829;
    --text-muted: #515b73;
    --text-dim: #8a93a8;
    --shadow: 0 10px 40px -16px rgba(20, 30, 60, .25);
  }
}

/* ---------- Reset / base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Sfondo decorativo a gradiente */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60rem 60rem at 15% -10%, rgba(99, 102, 241, .18), transparent 60%),
    radial-gradient(50rem 50rem at 100% 0%, rgba(6, 182, 212, .14), transparent 55%),
    radial-gradient(40rem 40rem at 50% 120%, rgba(168, 85, 247, .12), transparent 60%);
  pointer-events: none;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 { line-height: 1.15; margin: 0 0 .4em; font-weight: 800; letter-spacing: -.02em; }
p { margin: 0 0 1rem; color: var(--text-muted); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-2), var(--accent-1), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
}
.brand .dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--accent-grad);
  box-shadow: var(--shadow-glow);
}
.nav-links {
  display: flex;
  gap: .35rem;
  align-items: center;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  padding: .5rem .8rem;
  border-radius: 999px;
  font-size: .94rem;
  color: var(--text-muted);
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface); }

.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: 42px; height: 42px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.2rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .96rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: 0 8px 30px -10px rgba(99, 102, 241, .7);
}
.btn-primary:hover { box-shadow: 0 12px 38px -8px rgba(99, 102, 241, .9); transform: translateY(-2px); }
.btn-ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent-1); color: #fff; }
@media (prefers-color-scheme: light) { .btn-ghost:hover { color: var(--accent-1); } }

/* ---------- Sections ---------- */
.section { padding: clamp(3.5rem, 9vw, 6.5rem) 0; }
.section-head { max-width: 640px; margin-bottom: 2.6rem; }
.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: .7rem;
}
.section-head h2 { font-size: clamp(1.7rem, 4vw, 2.5rem); }
.section-head p { font-size: 1.05rem; }

/* ---------- Hero ---------- */
.hero { padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4rem); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 6vw, 4rem);
  align-items: center;
}
.hero h1 { font-size: clamp(2.3rem, 6.5vw, 4rem); }
.hero .lead { font-size: clamp(1.05rem, 2.5vw, 1.25rem); color: var(--text-muted); max-width: 48ch; }
.hero-role {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .4rem .9rem;
  border-radius: 999px;
  background: var(--accent-grad-soft);
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: 1.4rem;
  color: var(--text);
}
.hero-role .pulse {
  width: 9px; height: 9px; border-radius: 50%;
  background: #22d39a;
  box-shadow: 0 0 0 0 rgba(34, 211, 154, .6);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 211, 154, .55); }
  70% { box-shadow: 0 0 0 10px rgba(34, 211, 154, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 211, 154, 0); }
}
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }
.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2.4rem;
  flex-wrap: wrap;
}
.hero-stats .stat strong {
  display: block;
  font-size: 1.7rem;
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-stats .stat span { font-size: .85rem; color: var(--text-dim); }

.hero-photo { justify-self: center; position: relative; }
.hero-photo .ring {
  position: relative;
  width: clamp(220px, 30vw, 300px);
  aspect-ratio: 1;
  border-radius: 50%;
  padding: 8px;
  background: conic-gradient(from 180deg, var(--accent-2), var(--accent-3), var(--accent-1), var(--accent-2));
  box-shadow: var(--shadow-glow);
  animation: spin 14s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero-photo .ring img {
  border-radius: 50%;
  width: 100%; height: 100%;
  object-fit: cover;
  animation: spin 14s linear infinite reverse; /* contro-rotazione: foto ferma */
  background: var(--surface);
}
.hero-photo .badge {
  position: absolute;
  bottom: 6%;
  left: -8%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: .6rem .9rem;
  box-shadow: var(--shadow);
  font-size: .85rem;
  font-weight: 600;
  display: flex; align-items: center; gap: .5rem;
}
.hero-photo .badge.tr { bottom: auto; top: 8%; left: auto; right: -6%; }

/* ---------- Cards / surfaces ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent-1) 50%, var(--border)); box-shadow: var(--shadow); }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 2.2rem; align-items: start; }
.about-text p { font-size: 1.05rem; }
.facts { display: grid; gap: .8rem; }
.fact {
  display: flex; gap: .8rem; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .9rem 1rem;
}
.fact .ic {
  flex: none; width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center; font-size: 1.1rem;
  background: var(--accent-grad-soft); border: 1px solid var(--border);
}
.fact strong { display: block; font-size: .95rem; }
.fact span { font-size: .85rem; color: var(--text-dim); }

/* ---------- Timeline (esperienze) ---------- */
.timeline { position: relative; margin-left: .5rem; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 4px; bottom: 4px;
  width: 2px; background: linear-gradient(var(--accent-1), var(--accent-2), transparent);
}
.tl-item { position: relative; padding: 0 0 1.8rem 2.2rem; }
.tl-item::before {
  content: ""; position: absolute; left: 0; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--accent-1);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-1) 18%, transparent);
}
.tl-item .when { font-size: .82rem; color: var(--accent-2); font-weight: 700; letter-spacing: .02em; }
.tl-item h3 { font-size: 1.15rem; margin: .15rem 0 .1rem; }
.tl-item .org { color: var(--text); font-weight: 600; }
.tl-item p { margin: .35rem 0 0; font-size: .95rem; }

/* ---------- Skills ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1.1rem;
}
.skill-cat h3 { font-size: 1.05rem; display: flex; align-items: center; gap: .5rem; }
.skill-cat h3 .ic { font-size: 1.2rem; }
.chips { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .9rem; }
.chip {
  font-size: .82rem;
  padding: .35rem .7rem;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: color .2s, border-color .2s, background .2s;
}
.chip:hover { color: var(--text); border-color: var(--accent-1); background: var(--accent-grad-soft); }

/* ---------- Portfolio ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.3rem;
}
.project { display: flex; flex-direction: column; }
.project .top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: .8rem; }
.project .tag {
  font-size: .74rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  color: var(--accent-2); padding: .25rem .6rem; border-radius: 999px;
  background: var(--accent-grad-soft); border: 1px solid var(--border);
}
.project .year { font-size: .82rem; color: var(--text-dim); font-weight: 600; }
.project h3 { font-size: 1.12rem; }
.project p { font-size: .92rem; margin-bottom: 0; }

/* Card canale YouTube */
.project-yt { border-color: color-mix(in srgb, #ff0000 35%, var(--border)); }
.project-yt .tag { color: #ff4d4d; background: color-mix(in srgb, #ff0000 12%, transparent); }
.project-link {
  display: inline-flex; align-items: center; gap: .5rem;
  margin-top: 1rem; align-self: flex-start;
  padding: .55rem 1rem; border-radius: 999px;
  font-size: .9rem; font-weight: 600; color: #fff;
  background: #ff0000;
  transition: transform .15s ease, box-shadow .2s ease, filter .2s ease;
}
.project-link svg { fill: currentColor; }
.project-link:hover { transform: translateY(-2px); filter: brightness(1.08); box-shadow: 0 8px 20px color-mix(in srgb, #ff0000 35%, transparent); }
.project-link.brand { background: var(--accent-grad); }
.project-link.brand:hover { box-shadow: 0 8px 20px color-mix(in srgb, var(--accent-1) 35%, transparent); }

.publication {
  margin-top: 1.6rem;
  display: flex; gap: 1rem; align-items: flex-start;
  background: var(--accent-grad-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
}
.publication .ic { font-size: 1.6rem; }
.publication h3 { font-size: 1.05rem; margin-bottom: .2rem; }
.publication p { margin: 0; font-size: .9rem; }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 2.2rem; align-items: start; }
.contact-info .channel {
  display: flex; gap: .9rem; align-items: center;
  padding: .9rem 0; border-bottom: 1px solid var(--border);
}
.contact-info .channel:last-child { border-bottom: 0; }
.contact-info .ic {
  flex: none; width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center; font-size: 1.2rem;
  background: var(--surface); border: 1px solid var(--border);
}
.contact-info .channel span { font-size: .82rem; color: var(--text-dim); display: block; }
.contact-info .channel strong { font-weight: 600; }

.form { display: grid; gap: 1rem; }
.field { display: grid; gap: .4rem; }
.field label { font-size: .85rem; font-weight: 600; color: var(--text-muted); }
.field input,
.field textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .8rem .9rem;
  transition: border-color .2s, box-shadow .2s;
  resize: vertical;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent-1);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-1) 25%, transparent);
}
.consent { display: flex; gap: .6rem; align-items: flex-start; font-size: .85rem; color: var(--text-muted); }
.consent input { margin-top: .25rem; accent-color: var(--accent-1); }
.consent a { color: var(--accent-2); text-decoration: underline; }
/* honeypot anti-spam: nascosto agli umani */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: .82rem; color: var(--text-dim); }

/* ---------- Social links ---------- */
.socials { display: flex; gap: .7rem; flex-wrap: wrap; }
.socials.hero-socials { margin-top: 1.8rem; }
.social {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: transform .18s ease, color .2s, border-color .2s, background .2s, box-shadow .2s;
}
.social svg { width: 20px; height: 20px; fill: currentColor; }
.social:hover {
  transform: translateY(-3px);
  color: #fff;
  border-color: transparent;
  background: var(--accent-grad);
  box-shadow: 0 8px 24px -8px rgba(99, 102, 241, .7);
}
@media (max-width: 860px) { .socials.hero-socials { justify-content: center; } }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.4rem 0;
  margin-top: 2rem;
}
.footer-grid { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.2rem; }
.footer-links a { color: var(--text-muted); font-size: .9rem; }
.footer-links a:hover { color: var(--text); }
.footer-links button {
  background: none; border: 0; color: var(--text-muted);
  font: inherit; font-size: .9rem; cursor: pointer; padding: 0;
}
.footer-links button:hover { color: var(--text); }
.copyright { font-size: .85rem; color: var(--text-dim); }

/* ---------- Cookie banner ---------- */
.cookie-banner {
  position: fixed;
  left: 50%; bottom: 1.2rem;
  transform: translateX(-50%) translateY(140%);
  width: min(640px, calc(100% - 2rem));
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow);
  z-index: 100;
  transition: transform .4s cubic-bezier(.2,.8,.2,1);
}
.cookie-banner.show { transform: translateX(-50%) translateY(0); }
.cookie-banner h3 { font-size: 1rem; margin-bottom: .3rem; }
.cookie-banner p { font-size: .88rem; margin-bottom: 1rem; }
.cookie-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.cookie-actions .btn { padding: .55rem 1.1rem; font-size: .9rem; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero .lead { margin-inline: auto; }
  .hero-role, .hero-cta, .hero-stats { justify-content: center; }
  .hero-photo { order: -1; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    z-index: -1;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border);
    padding: .6rem var(--gutter) 1rem;
    transform: translateY(-110%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform .3s ease, opacity .2s ease, visibility .3s;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    box-shadow: var(--shadow);
  }
  .nav-links a { padding: .8rem .4rem; border-radius: 8px; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
}

/* ---------- Legal pages ---------- */
.legal { padding: clamp(2.5rem, 7vw, 4.5rem) 0; }
.legal .container { max-width: 760px; }
.legal h1 { font-size: clamp(1.8rem, 5vw, 2.6rem); margin-bottom: .4rem; }
.legal h2 { font-size: 1.25rem; margin-top: 2.2rem; }
.legal p, .legal li { color: var(--text-muted); }
.legal ul { padding-left: 1.2rem; }
.legal .back { display: inline-flex; align-items: center; gap: .4rem; color: var(--accent-2); margin-bottom: 1.5rem; font-weight: 600; }
.legal .updated { font-size: .85rem; color: var(--text-dim); }
.legal .note {
  background: var(--accent-grad-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem 1.2rem; font-size: .9rem;
}