/* ============================================================
   style.css
   Design tokens definiti come CSS variables in :root e [data-theme].
   Per cambiare i colori del sito, modifica SOLO le variabili qui sotto.
   ============================================================ */

:root{
  --bg: #10141c;
  --surface: #171d2b;
  --surface-2: #1e2536;
  --text: #edeff4;
  --text-muted: #8a93a6;
  --accent: #f2b84b;
  --accent-ink: #2a1c02;
  --accent-2: #4fd1c5;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 20px 50px -20px rgba(0,0,0,0.6);

  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --maxw: 1180px;

  color-scheme: dark;
}

[data-theme="light"]{
  --bg: #efeee9;
  --surface: #ffffff;
  --surface-2: #f6f4ef;
  --text: #1b1f27;
  --text-muted: #5b6272;
  --accent: #c8891f;
  --accent-ink: #fff7e6;
  --accent-2: #1f8f83;
  --border: rgba(20,20,20,0.09);
  --shadow: 0 20px 40px -22px rgba(20,20,20,0.25);
  color-scheme: light;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background .35s ease, color .35s ease;
}

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display:block; }
ul{ list-style: none; margin:0; padding:0; }
button{ font-family: inherit; }

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- utility bar (tema + lingua) ---------- */
.util-bar{
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 60;
  display:flex;
  gap: 8px;
}
.util-btn{
  display:flex; align-items:center; justify-content:center;
  width: 40px; height: 40px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  cursor:pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  box-shadow: var(--shadow);
  transition: transform .2s ease, border-color .2s ease;
}
.util-btn:hover{ transform: translateY(-2px); border-color: var(--accent); }
.util-btn svg{ width:18px; height:18px; }

/* ---------- intro / game-engine loading screen ---------- */
#intro{
  position: fixed; inset:0; z-index: 100;
  background:
    radial-gradient(60% 50% at 50% 40%, rgba(242,184,75,0.08), transparent 70%),
    radial-gradient(50% 45% at 80% 80%, rgba(79,209,197,0.07), transparent 70%),
    #0a0d13;
  color: #eef1f6;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap: 26px;
  transition: opacity .5s ease, visibility .5s ease;
}
#intro.hidden{ opacity:0; visibility:hidden; pointer-events:none; }

.loader-mark{
  position: relative;
  width: 64px; height: 64px;
  display:flex; align-items:center; justify-content:center;
}
.loader-ring{
  position:absolute; inset:0;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  border-right-color: var(--accent);
  animation: spin 1s linear infinite;
}
.loader-mark .dot{
  width: 10px; height:10px; border-radius: 3px;
  background: var(--accent);
  transform: rotate(45deg);
}

.loader-title{
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  letter-spacing: .01em;
  text-align:center;
}
.loader-title span{ color: var(--accent); }

.loader-bar-wrap{
  width: min(340px, 70vw);
  display:flex; flex-direction:column; gap:10px;
}
.loader-bar-track{
  width:100%; height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow:hidden;
}
.loader-bar-fill{
  height:100%; width:0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  box-shadow: 0 0 14px rgba(242,184,75,.45);
  transition: width .18s ease-out;
}
.loader-meta{
  display:flex; justify-content:space-between;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #8a93a6;
}
#loader-status{ min-width: 0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

#skip-intro{
  position:absolute; bottom: 6vh; right: 6vw;
  background:transparent; border:1px solid rgba(255,255,255,.25);
  color:#eef1f6; font-family: var(--font-mono); font-size:12px;
  padding: 8px 14px; border-radius: 999px; cursor:pointer;
  transition: border-color .2s ease, transform .2s ease;
}
#skip-intro:hover{ border-color: var(--accent); transform: translateY(-2px); }

@keyframes spin{ to{ transform: rotate(360deg); } }

@media (prefers-reduced-motion: reduce){
  #intro{ display:none; }
  html{ scroll-behavior:auto; }
  *{ animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ---------- header / hero ---------- */
.hero{
  position: relative;
  padding: 140px 0 90px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(55% 60% at 85% 15%, rgba(242,184,75,0.10), transparent 65%),
    radial-gradient(45% 55% at 5% 90%, rgba(79,209,197,0.09), transparent 65%);
}
.hero .container{ position:relative; z-index:1; }

.hero-inner{
  display:grid;
  grid-template-columns: minmax(0,1fr) minmax(0,560px);
  gap: 56px;
  align-items:center;
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .06em;
  display:inline-flex; align-items:center; gap:8px;
  margin-bottom: 14px;
}
.eyebrow::before{ content:"//"; opacity:.6; }

.hero h1{
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  line-height: 1.06;
  margin: 0 0 14px;
  letter-spacing: -.01em;
}
.hero .tagline{
  max-width: 460px;
  color: var(--text-muted);
  font-size: .95rem;
  margin-bottom: 22px;
}
.hero-cta{
  display:inline-flex; align-items:center; gap:10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight:600;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  font-size: .88rem;
  transition: transform .2s ease;
}
.hero-cta:hover{ transform: translateY(-2px); }

.socials{
  display:flex; flex-wrap: wrap; gap:10px;
  margin-top: 26px;
}
.socials a{
  width: 38px; height:38px;
  display:flex; align-items:center; justify-content:center;
  border-radius:999px;
  background: var(--surface);
  border:1px solid var(--border);
  transition: transform .2s ease, border-color .2s ease, color .2s ease;
}
.socials a:hover{ transform: translateY(-3px); border-color: var(--accent); color: var(--accent); }
.socials svg{ width:18px; height:18px; }

/* ---------- hero slideshow ---------- */
.hero-slideshow{
  position: relative;
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  overflow:hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.slideshow-track{
  position:absolute; inset:0;
}
.slideshow-track img{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit: cover;
  opacity:0;
  transition: opacity .8s ease;
}
.slideshow-track img.active{ opacity:1; }
.slideshow-track::after{
  /* leggera vignetta per far risaltare i pallini/testo se serve in futuro, resta in tema con superficie scura/chiara */
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,.28) 100%);
  pointer-events:none;
}
.slideshow-dots{
  position:absolute; left:0; right:0; bottom:14px;
  display:flex; justify-content:center; gap:8px;
  z-index: 2;
}
.slideshow-dots button{
  width:8px; height:8px; border-radius:999px;
  background: rgba(255,255,255,.45);
  border: none; cursor:pointer; padding:0;
  transition: background .2s ease, transform .2s ease, width .2s ease;
}
.slideshow-dots button.active{
  background: var(--accent);
  width: 22px;
}

/* ---------- tabs ---------- */
.tabs-nav{
  position: sticky; top:0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.tabs-nav .container{
  display:flex; gap: 6px;
  overflow-x:auto;
}
.tab-btn{
  font-family: var(--font-mono);
  font-size: 13.5px;
  padding: 16px 18px;
  background:none; border:none;
  color: var(--text-muted);
  cursor:pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease;
}
.tab-btn:hover{ color: var(--text); }
.tab-btn.active{ color: var(--accent); border-color: var(--accent); }

/* ---------- sections / panels ---------- */
.panel{ display:none; padding: 56px 0 90px; }
.panel.active{ display:block; animation: fadein .45s ease; }
@keyframes fadein{ from{ opacity:0; transform: translateY(8px); } to{ opacity:1; transform:none; } }

.panel-head{ margin-bottom: 36px; }
.panel-head h2{
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--text);
  margin: 0 0 8px;
}
.panel-head p{ color: var(--text-muted); margin:0; max-width: 560px; }

.panel-body{
  display:grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}

/* sidebar */
.side-nav{
  position: sticky; top: 78px;
  border-left: 1px solid var(--border);
  padding-left: 18px;
}
.side-nav .label{
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 12px;
}
.side-nav ul{ display:flex; flex-direction:column; gap:2px; }
.side-nav a{
  display:block;
  padding: 9px 12px;
  margin-left: -18px;
  border-left: 2px solid transparent;
  padding-left: 16px;
  font-size: .92rem;
  color: var(--text-muted);
  border-radius: 0 8px 8px 0;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}
.side-nav a .idx{ font-family: var(--font-mono); color: var(--accent-2); margin-right:8px; font-size:.82em; }
.side-nav a:hover{ color: var(--text); background: var(--surface); }
.side-nav a.active{ color: var(--text); border-color: var(--accent); background: var(--surface); font-weight:600; }

/* project list */
.project-list{ display:flex; flex-direction:column; gap: 22px; }

.project-card{
  scroll-margin-top: 90px;
  display:grid;
  grid-template-columns: 260px 1fr;
  gap: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color .25s ease, transform .25s ease;
}
.project-card:hover{ border-color: var(--accent); }
.project-card.portrait{ grid-template-columns: 170px 1fr; }

.project-thumb{
  border-radius: var(--radius-sm);
  overflow:hidden;
  background: var(--surface-2);
  aspect-ratio: 16/10;
}
.project-card.portrait .project-thumb{ aspect-ratio: 9/16; }
.project-thumb img{ width:100%; height:100%; object-fit: cover; }
.project-thumb.placeholder{
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-mono); font-size:.75rem; color: var(--text-muted);
  text-align:center; padding: 10px;
}

.project-info{ display:flex; flex-direction:column; }
.project-info h3{
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin: 0 0 8px;
}
.project-info .short{ color: var(--text-muted); margin: 0 0 14px; font-size: .95rem; }
.tag-row{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom: 16px; }
.tag{
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.card-actions{ display:flex; gap:10px; margin-top:auto; flex-wrap:wrap; }
.btn{
  font-size: .85rem;
  padding: 9px 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
  font-weight: 600;
}
.btn.primary{ background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.secondary{ background: transparent; color: var(--text); }
.btn:hover{ transform: translateY(-2px); }

/* ---------- footer ---------- */
footer{
  border-top: 1px solid var(--border);
  padding: 30px 0;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12.5px;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
}

/* ---------- project detail page ---------- */
.detail-header{ padding: 130px 0 40px; border-bottom: 1px solid var(--border); }
.back-link{
  font-family: var(--font-mono); font-size: 13px; color: var(--text-muted);
  display:inline-flex; align-items:center; gap:6px; margin-bottom: 22px;
}
.back-link:hover{ color: var(--accent); }
.detail-header h1{ font-family: var(--font-display); font-size: clamp(2rem,5vw,3rem); margin:0 0 10px; }
.detail-gallery{
  display:grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
  gap: 16px; padding: 40px 0;
}
.detail-gallery img, .detail-gallery .ph{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  width:100%;
}
.detail-body{ max-width: 720px; padding-bottom: 80px; color: var(--text); }
.detail-body p{ color: var(--text-muted); }

/* ---------- responsive ---------- */
@media (max-width: 900px){
  .hero-inner{ grid-template-columns: 1fr; gap: 30px; }
  .hero-slideshow{ order: -1; aspect-ratio: 16/9; }
  .panel-body{ grid-template-columns: 1fr; }
  .side-nav{
    position: static;
    border-left:none; padding-left:0;
    border-bottom: 1px solid var(--border);
    padding-bottom: 14px; margin-bottom: 6px;
  }
  .side-nav ul{ flex-direction:row; flex-wrap:wrap; }
  .side-nav a{ margin-left:0; border-left:none; border-bottom: 2px solid transparent; border-radius: 6px; }
  .side-nav a.active{ border-color: var(--accent); border-left:none; }
  .project-card{ grid-template-columns: 1fr; }
  .project-card.portrait{ grid-template-columns: 1fr; }
  .project-card.portrait .project-thumb{ max-width: 220px; }
}

@media (max-width: 560px){
  .util-bar{ top:10px; right:10px; }
  .hero{ padding-top: 100px; }
  footer{ flex-direction:column; }
}