/* =========================================================
   ROMEO BOVOLO — portfolio
   Direzione: "sempre a fuoco" — un linguaggio visivo preso
   in prestito dai mirini fotografici e dai metadati EXIF,
   coerente con chi lavora tra Python, computer vision e
   sistemi in tempo reale.
   ========================================================= */

:root{
  /* colore */
  --paper:  #EEF0EA;
  --panel:  #FFFFFF;
  --ink:    #16201C;
  --muted:  #5B6259;
  --line:   #C9CDBC;
  --accent: #FF5A2B; /* "autofocus" — arancio conferma messa a fuoco */
  --accent-2: #2F7A52; /* "focus lock" — verde conferma */

  /* tipografia */
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --font-sans: "Inter", system-ui, -apple-system, Segoe UI, sans-serif;

  /* layout */
  --container: 1080px;
  --radius: 4px;
  --corner: 16px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

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

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; display: block; }

a{ color: inherit; }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.container{
  width: min(92%, var(--container));
  margin-inline: auto;
}

/* =========================================================
   Sfondo a griglia — richiama il reticolo del mirino
   ========================================================= */
.grid-bg{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center;
  opacity: 0.35;
  position: absolute;
  inset: 0;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 78%);
}

/* =========================================================
   Header
   ========================================================= */
.site-header{
  background: var(--ink);
  color: var(--paper);
  padding: 18px 0;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(238,240,234,0.1);
}

.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--paper);
  white-space: nowrap;
}

.brand svg{ flex-shrink: 0; }

.brand .dot{ color: var(--accent); }

.nav-toggle{ display: none; }

.nav-toggle-label{
  display: none;
  cursor: pointer;
  width: 28px;
  height: 22px;
  position: relative;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after{
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--paper);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle-label span{ top: 10px; }
.nav-toggle-label span::before{ top: -8px; }
.nav-toggle-label span::after{ top: 8px; }

.site-nav{
  display: flex;
  gap: 28px;
}

.site-nav a{
  position: relative;
  text-decoration: none;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 2px;
}

.site-nav a::after{
  content: "";
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: 0;
  height: 2px;
  background: var(--accent);
  transition: left 0.2s ease, right 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.site-nav a[aria-current="page"]::after{
  left: 0;
  right: 0;
}

.site-nav a[aria-current="page"]{ color: var(--accent); }

/* =========================================================
   Viewfinder — il segno distintivo del sito:
   quattro angoli in stile mirino fotografico che
   "mettono a fuoco" un blocco di contenuto.
   ========================================================= */
.vf{
  position: relative;
  padding: clamp(28px, 5vw, 56px);
}

.vf-corner{
  position: absolute;
  width: var(--corner);
  height: var(--corner);
  border: 2px solid var(--accent);
  opacity: 0;
  transform: scale(1.5);
  animation: vfLock 0.6s cubic-bezier(.2,.8,.2,1) forwards;
}
.vf-corner.tl{ top: 0; left: 0; border-right: none; border-bottom: none; animation-delay: 0.05s; }
.vf-corner.tr{ top: 0; right: 0; border-left: none; border-bottom: none; animation-delay: 0.15s; }
.vf-corner.bl{ bottom: 0; left: 0; border-right: none; border-top: none; animation-delay: 0.15s; }
.vf-corner.br{ bottom: 0; right: 0; border-left: none; border-top: none; animation-delay: 0.25s; }

@keyframes vfLock{
  to{ opacity: 1; transform: scale(1); }
}

/* =========================================================
   Hero
   ========================================================= */
.hero{
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 10vw, 120px) 0 clamp(48px, 8vw, 80px);
  text-align: center;
}

.hero .container{ position: relative; z-index: 1; }

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 18px;
}

.eyebrow::before{
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-2);
  animation: blink 2.4s ease-in-out infinite;
}

@keyframes blink{
  0%, 100%{ opacity: 1; }
  50%{ opacity: 0.25; }
}

.hero h2{
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  max-width: 18ch;
  margin: 0 auto 20px;
}

.hero p{
  max-width: 56ch;
  margin: 0 auto 30px;
  color: var(--muted);
  font-size: 1.05rem;
}

.exif{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.02em;
  margin-top: 34px;
}

.exif span b{
  color: var(--ink);
  font-weight: 600;
}

/* =========================================================
   Bottoni
   ========================================================= */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 13px 26px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.btn:hover{
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
  transform: translateY(-2px);
}

.btn::after{ content: "→"; transition: transform 0.2s ease; }
.btn:hover::after{ transform: translateX(3px); }

/* =========================================================
   Sezioni generiche
   ========================================================= */
.section{
  padding: clamp(48px, 8vw, 88px) 0;
}

.section h2{
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: 18px;
}

.section > .container > p{
  max-width: 62ch;
  color: var(--muted);
  font-size: 1.02rem;
}

.section--alt{
  background: var(--panel);
  border-block: 1px solid var(--line);
}

/* striscia "impostazioni fotocamera" per numeri/sintesi */
.stats-strip{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 12px;
}

.stat{
  background: var(--panel);
  padding: 22px 20px;
}

.stat .k{
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.stat .v{
  font-weight: 600;
  font-size: 1.05rem;
}

/* =========================================================
   Cards (servizi)
   ========================================================= */
.cards{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 30px;
}

.card{
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.card:hover{
  border-color: var(--accent);
  transform: translateY(-4px);
}

.card .tag{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 14px;
}

.card h3{
  font-size: 1.15rem;
  margin: 0 0 10px;
}

.card p{
  color: var(--muted);
  font-size: 0.96rem;
  margin: 0;
}

/* corner-hover: piccole tacche che compaiono agli angoli della card in hover */
.card::before, .card::after{
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid var(--accent);
  opacity: 0;
  transition: opacity 0.2s ease;
}
.card::before{ top: -1px; left: -1px; border-right: none; border-bottom: none; }
.card::after{ bottom: -1px; right: -1px; border-left: none; border-top: none; }
.card:hover::before, .card:hover::after{ opacity: 1; }

/* =========================================================
   Skill tags (about)
   ========================================================= */
.tags{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.tags .tag{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 12px;
}

.bio p{
  max-width: 62ch;
  color: var(--ink);
  margin: 0 0 16px;
}

.bio p:last-child{ margin-bottom: 0; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer{
  background: var(--ink);
  color: var(--paper);
  padding: 40px 0 28px;
  margin-top: 40px;
}

.site-footer .container{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
}

.site-footer p{
  margin: 0;
  color: rgba(238,240,234,0.6);
  font-size: 0.85rem;
}

.site-footer nav{
  display: flex;
  gap: 22px;
}

.site-footer nav a{
  text-decoration: none;
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  opacity: 0.85;
}

.site-footer nav a:hover{ opacity: 1; color: var(--accent); }

/* =========================================================
   Reveal-on-scroll (facoltativo, gestito da index.js)
   ========================================================= */
.reveal{
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.in-view{ opacity: 1; transform: translateY(0); }
.reduce-motion .reveal{ opacity: 1; transform: none; transition: none; }

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 720px){
  .nav-toggle-label{ display: block; }

  .site-nav{
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--ink);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
    border-bottom: 1px solid rgba(238,240,234,0.1);
  }

  .site-nav a{
    padding: 14px 24px;
    width: 100%;
  }

  .nav-toggle:checked ~ .site-nav{
    max-height: 260px;
  }

  .nav-toggle:checked ~ .nav-toggle-label span{ background: transparent; }
  .nav-toggle:checked ~ .nav-toggle-label span::before{ transform: translateY(8px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-toggle-label span::after{ transform: translateY(-8px) rotate(-45deg); }

  .vf-corner{ display: none; } /* evita ingombro visivo sotto i 720px */

  .hero{ text-align: left; }
  .exif{ justify-content: flex-start; }
}

@media (max-width: 480px){
  .cards{ grid-template-columns: 1fr; }
}