/* ===== Base & reset ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', ui-monospace, monospace;
  background: #0d1117;
  color: #e6edf3;
  line-height: 1.65;
  min-height: 100vh;
  position: relative;
}
/* Sfondo a tema informatica: griglia sottile */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(48, 54, 61, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(48, 54, 61, 0.15) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}
body > * { position: relative; z-index: 1; }

a { color: #58a6ff; text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible { outline: 2px solid #58a6ff; outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
button:focus-visible { outline: 2px solid #3fb950; outline-offset: 2px; }

/* ===== Skip link (accessibilità) ===== */
.skip-link {
  position: absolute;
  top: -3rem;
  left: 0.5rem;
  padding: 0.5rem 1rem;
  background: #161b22;
  color: #58a6ff;
  z-index: 201;
  border: 1px solid #30363d;
  border-radius: 6px;
  transition: top 0.2s;
}
.skip-link:focus { top: 0.5rem; outline: 2px solid #3fb950; outline-offset: 2px; }

/* ===== Lang switch ===== */
.lang-switch {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
  background: #161b22;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  font-size: 0.9rem;
  border: 1px solid #30363d;
}
.lang-switch button {
  background: none;
  border: none;
  color: #8b949e;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
}
.lang-switch button:hover { color: #e6edf3; }
.lang-switch button.active { color: #58a6ff; font-weight: 600; }

/* ===== Window (terminale / IDE) ===== */
.window {
  background: #161b22;
  border: 1px solid #30363d;
  border-radius: 8px;
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.dots {
  padding: 0.5rem 1rem;
  background: #21262d;
  border-bottom: 1px solid #30363d;
  display: flex;
  gap: 8px;
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot.red { background: #f85149; }
.dot.yellow { background: #d29922; }
.dot.green { background: #3fb950; }

/* ===== Prompts (stile terminale) ===== */
.prompt {
  color: #3fb950;
  font-size: 0.9rem;
  margin: 1rem 0 0.25rem;
  font-weight: 500;
  text-shadow: 0 0 8px rgba(63, 185, 80, 0.2);
}
.prompt:first-of-type { margin-top: 0; }

/* ===== Hero ===== */
.hero {
  padding: 2rem 1rem 3rem;
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero .window { width: 100%; }
.hero .content-row {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
  padding: 1.5rem 1.5rem 2rem;
}
.profile-pic {
  flex-shrink: 0;
}
.profile-pic img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid #30363d;
}
.profile-text { flex: 1; min-width: 200px; }
.profile-text h1 {
  margin: 0 0 0.25rem;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
}
.subtitle {
  margin: 0 0 0.5rem;
  color: #8b949e;
  font-size: 0.95rem;
}
.bio {
  margin: 0 0 1rem;
  color: #c9d1d9;
  font-size: 0.9rem;
}
.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.skills span {
  background: #21262d;
  color: #c9d1d9;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  font-size: 0.85rem;
  border: 1px solid #30363d;
}
.skills span.more { color: #8b949e; }

/* ===== Projects ===== */
.projects {
  padding: 2rem 1rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}
.projects > h2,
.impact > h2 {
  margin: 0 0 1.5rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: #8b949e;
  border-bottom: 1px solid #30363d;
  padding-bottom: 0.5rem;
}
.projects > h2::before { content: '// '; color: #3fb950; }
.impact > h2::before { content: '// '; color: #3fb950; }
.project-card {
  background: #161b22;
  border: 1px solid #30363d;
  border-left: 3px solid #3fb950;
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.project-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #58a6ff;
}
.project-card .period {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  color: #8b949e;
}
.project-card p { margin: 0 0 0.75rem; color: #c9d1d9; font-size: 0.9rem; }
.project-card ul {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: #8b949e;
  font-size: 0.9rem;
}
.project-card li { margin-bottom: 0.25rem; }
.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tech-tags span {
  background: #21262d;
  color: #8b949e;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
}

/* ===== Hobbies ===== */
.hobbies-card { padding: 0 0 1rem; }
.hobby-item {
  background: #161b22;
  border: 1px solid #30363d;
  border-left: 3px solid #d29922;
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.hobby-item h4 { margin: 0 0 0.5rem; color: #58a6ff; font-size: 1.05rem; font-weight: 600; }
.hobby-item p { margin: 0 0 0.5rem; color: #c9d1d9; font-size: 0.95rem; }
.highlight { color: #79c0ff; font-weight: 500; }
.hobby-note { color: #8b949e; font-size: 0.9rem; margin-top: 0.5rem !important; }
.hobby-cta { margin: 0.75rem 0 0 !important; font-size: 0.9rem; }
.hobby-cta a { margin-right: 0.5rem; }

/* ===== Impact ===== */
.impact {
  padding: 2rem 1rem 4rem;
  max-width: 900px;
  margin: 0 auto;
}
.impact-category { margin-bottom: 2rem; }
.impact-category h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: #58a6ff;
}
.impact-category h3::before { content: '/* '; color: #6e7681; font-weight: 400; }
.impact-category h3::after { content: ' */'; color: #6e7681; font-weight: 400; }
.impact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.impact-card {
  background: #161b22;
  border: 1px solid #30363d;
  border-left: 3px solid #58a6ff;
  border-radius: 6px;
  padding: 1rem 1.25rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.impact-card h4 { margin: 0 0 0.5rem; font-size: 0.95rem; font-weight: 600; color: #e6edf3; }
.impact-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: #8b949e;
  font-size: 0.9rem;
}
.impact-card li { margin-bottom: 0.25rem; }

/* ===== Contact ===== */
.contact {
  padding: 2rem 1rem 4rem;
}
.contact .window {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 0 1.5rem;
}
.contact .dots { margin-bottom: 0; }
.contact .prompt { padding: 0 1.5rem; }
.contact h2 { padding: 0 1.5rem; margin: 0.25rem 0 1rem; font-size: 1.35rem; }
.info-box {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #21262d;
  border: 1px solid #30363d;
  border-radius: 6px;
  padding: 0.6rem 1rem;
  margin: 0.25rem 0 1rem;
  margin-left: 1.5rem;
  color: #e6edf3;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}
a.info-box:hover { border-color: #58a6ff; text-decoration: none; }
.info-box i { color: #58a6ff; }
.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0.5rem 0 1.5rem;
  padding: 0 1.5rem;
}
.social-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #21262d;
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  color: #e6edf3;
  min-width: 180px;
  transition: border-color 0.2s;
}
.social-card:hover { border-color: #58a6ff; text-decoration: none; color: #e6edf3; }
.social-card i { font-size: 1.5rem; color: #58a6ff; }
.social-card strong { display: block; }
.social-card span { font-size: 0.85rem; color: #8b949e; }

/* ===== Scroll to top ===== */
#scrollTopBtn {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #21262d;
  border: 1px solid #30363d;
  color: #e6edf3;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 99;
  transition: background 0.2s, border-color 0.2s;
}
#scrollTopBtn:hover { background: #30363d; border-color: #3fb950; color: #3fb950; }
#scrollTopBtn i { font-size: 0.9rem; }

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .hero .content-row { flex-direction: column; text-align: center; }
  .profile-pic img { width: 120px; height: 120px; }
  .lang-switch { top: 0.5rem; right: 0.5rem; font-size: 0.85rem; }
  .social-links { flex-direction: column; }
  .info-box { margin-left: 0; }
  .contact .prompt { padding-left: 1rem; }
  .contact-form { padding: 0 1rem; }
}