/* =========================================================
   SANDRO BOVO — stylesheet
   Identità del brand: rosso e nero.
   ========================================================= */

:root {
  --bg: #0b0b0d;
  --bg-soft: #131316;
  --bg-card: #17171b;
  --border: rgba(255,255,255,0.08);
  --text: #f4f3f0;
  --text-dim: #a8a6a1;
  --accent: #e4463f;
  --accent-soft: rgba(228,70,63,0.14);
  --accent-strong: #ff6b63;

  --font-display: "Bebas Neue", "Manrope", sans-serif;
  --font-body: "Manrope", sans-serif;

  --container: 1180px;
  --radius: 18px;
  --transition: 0.35s cubic-bezier(.22,.61,.36,1);
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: 0.5px; font-weight: 400; margin: 0; }
p { margin: 0; }
img { max-width: 100%; display: block; }

::selection { background: var(--accent); color: #17130a; }

/* -------------------- Reveal on scroll -------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* -------------------- Buttons -------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--accent);
  color: #17130a;
}
.btn-primary:hover { background: var(--accent-strong); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* -------------------- Header -------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: background var(--transition), padding var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(11,11,13,0.85);
  backdrop-filter: blur(14px);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  letter-spacing: 1px;
}
.logo span { color: var(--accent); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
  font-weight: 500;
}
.main-nav a { position: relative; color: var(--text-dim); transition: color var(--transition); white-space: nowrap; }
.main-nav a:hover { color: var(--text); }
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}
.main-nav a:hover::after { width: 100%; }

.nav-cta {
  background: var(--accent-soft);
  color: var(--accent) !important;
  padding: 8px 18px;
  border-radius: 999px;
}
.nav-cta::after { display: none; }

/* -------------------- Selettore lingua -------------------- */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color var(--transition);
}
.lang-toggle:hover { border-color: var(--accent); }
.lang-toggle .lang-flag { opacity: 0.45; transition: opacity var(--transition); }
.lang-toggle .lang-sep { opacity: 0.3; }
.lang-toggle.lang-it-active [data-lang-option="it"] { opacity: 1; color: var(--accent); }
.lang-toggle.lang-en-active [data-lang-option="en"] { opacity: 1; color: var(--accent); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* -------------------- Hero -------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  overflow: hidden;
}

.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-glow {
  position: absolute;
  top: -20%; right: -10%;
  width: 60vw; height: 60vw;
  background: radial-gradient(circle, rgba(228,179,99,0.18), transparent 65%);
  filter: blur(10px);
  animation: float 14s ease-in-out infinite;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, black 40%, transparent 75%);
}

@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(-4%, 4%) scale(1.08); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin-bottom: 18px;
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 1.05;
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-dim);
  max-width: 640px;
  margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

.scroll-cue {
  position: absolute;
  bottom: 36px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1px solid var(--border);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.scroll-cue span {
  width: 4px; height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scrollcue 1.8s ease infinite;
}
@keyframes scrollcue {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* -------------------- Section basics -------------------- */
section { position: relative; padding: 120px 0; }
.section-tag {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.section-title { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 56px; max-width: 700px; }
.center { margin-left: auto; margin-right: auto; text-align: center; }

/* -------------------- About -------------------- */
.about { background: var(--bg-soft); }
.about-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: center;
}
.about-frame {
  position: relative;
  aspect-ratio: 4/5;
  border-radius: var(--radius);
  background: linear-gradient(160deg, #1c1c20, #0e0e10);
  border: 1px solid var(--border);
  overflow: hidden;
}
.about-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  z-index: 1;
  filter: grayscale(10%) contrast(1.05);
}
.about-frame-glow {
  position: absolute;
  bottom: -30%; left: -20%;
  width: 80%; height: 60%;
  background: radial-gradient(circle, rgba(228,179,99,0.25), transparent 70%);
  animation: float 12s ease-in-out infinite;
  z-index: 2;
  mix-blend-mode: screen;
  pointer-events: none;
}
.about-copy h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 24px; }
.about-text p { color: var(--text-dim); margin-bottom: 18px; }

/* -------------------- Services -------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.service-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent);
  background: #1b1b1f;
}
.service-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px;
  color: var(--accent);
}
.service-icon svg { width: 26px; height: 26px; }
.service-card h3 { font-family: var(--font-body); font-weight: 700; font-size: 1.1rem; margin-bottom: 12px; }
.service-card p { color: var(--text-dim); font-size: 0.94rem; }

/* -------------------- AI Consulting -------------------- */
.ai-consulting {
  background: radial-gradient(circle at 15% 20%, rgba(228,179,99,0.08), transparent 45%), var(--bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.ai-intro { max-width: 760px; margin-bottom: 56px; }
.ai-intro h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 20px; }
.ai-lead { color: var(--text-dim); font-size: 1.05rem; }

.ai-capabilities {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 64px;
}
.ai-capability {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  background: var(--bg-card);
}
.ai-capability h4 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 10px;
  color: var(--accent-strong);
}
.ai-capability p { color: var(--text-dim); font-size: 0.9rem; }

.ai-case {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}
.ai-case-copy { padding: 44px; display: flex; flex-direction: column; gap: 18px; align-items: flex-start; justify-content: center; }
.ai-case-copy h3 { font-family: var(--font-body); font-weight: 700; font-size: 1.3rem; }
.ai-case-copy p { color: var(--text-dim); font-size: 0.96rem; }

.ai-case-quote {
  margin: 0;
  padding: 44px;
  background: linear-gradient(160deg, rgba(228,179,99,0.14), rgba(228,179,99,0.02));
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
  border-left: 1px solid var(--border);
}
.ai-case-quote p {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  line-height: 1.3;
  color: var(--text);
}
.ai-case-quote p::before { content: "“"; color: var(--accent); }
.ai-case-quote p::after { content: "”"; color: var(--accent); }
.ai-case-quote cite {
  font-style: normal;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* -------------------- Process -------------------- */
.process { background: var(--bg-soft); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}
.process-step { position: relative; padding-left: 8px; }
.process-number {
  font-family: var(--font-display);
  font-size: 3.2rem;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--accent);
  line-height: 1;
  margin-bottom: 16px;
  display: block;
}
.process-step h3 { font-family: var(--font-body); font-weight: 700; font-size: 1.1rem; margin-bottom: 10px; }
.process-step p { color: var(--text-dim); font-size: 0.95rem; }

/* -------------------- Portfolio -------------------- */
.portfolio-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 48px;
}
.filter-btn {
  padding: 9px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-dim);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover { color: var(--text); border-color: var(--accent); }
.filter-btn.active { background: var(--accent); color: #17130a; border-color: var(--accent); }

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.portfolio-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  background: #000;
  border: 1px solid var(--border);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.portfolio-card.hidden-item { display: none; }
.portfolio-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease, filter 0.6s ease;
  filter: grayscale(40%) brightness(0.75);
}
.portfolio-card:hover img { transform: scale(1.08); filter: grayscale(0%) brightness(0.9); }

.portfolio-overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 22px;
  background: linear-gradient(0deg, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.1) 60%, transparent 100%);
}
.portfolio-cat {
  color: var(--accent);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 700;
  margin-bottom: 6px;
}
.portfolio-overlay h3 { font-family: var(--font-body); font-weight: 700; font-size: 1.05rem; }

.play-badge {
  position: absolute;
  top: 18px; right: 18px;
  width: 42px; height: 42px;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(255,255,255,0.25);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), transform var(--transition);
}
.portfolio-card:hover .play-badge { background: var(--accent); transform: scale(1.08); }
.play-badge svg { width: 16px; height: 16px; margin-left: 2px; }

/* -------------------- Lightbox -------------------- */
.lightbox {
  position: fixed; inset: 0;
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.35s ease;
}
.lightbox.is-open { opacity: 1; pointer-events: auto; }
.lightbox-backdrop {
  position: absolute; inset: 0;
  background: rgba(6,6,7,0.9);
  backdrop-filter: blur(6px);
}
.lightbox-panel {
  position: relative;
  z-index: 1;
  width: 100%; max-width: 920px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transform: translateY(20px) scale(0.98);
  transition: transform 0.35s ease;
}
.lightbox.is-open .lightbox-panel { transform: translateY(0) scale(1); }
.lightbox-video { position: relative; width: 100%; aspect-ratio: 16/9; background: #000; }
.lightbox-video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.lightbox-info { padding: 24px 28px; }
.lightbox-info h3 { font-family: var(--font-body); font-weight: 700; font-size: 1.2rem; margin-bottom: 10px; }
.lightbox-info p { color: var(--text-dim); font-size: 0.95rem; }
.lightbox-close {
  position: absolute; top: 14px; right: 14px;
  z-index: 2;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: none;
  background: rgba(0,0,0,0.5);
  color: #fff;
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: background var(--transition);
}
.lightbox-close:hover { background: var(--accent); color: #17130a; }

/* -------------------- Partners -------------------- */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
.partner-chip {
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
}
.partner-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

/* -------------------- Contact -------------------- */
.contact { background: var(--bg-soft); }
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.contact-copy h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); margin: 16px 0 18px; }
.contact-copy > p { color: var(--text-dim); margin-bottom: 36px; max-width: 420px; }

.contact-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 20px; }
.contact-list li { display: flex; flex-direction: column; gap: 4px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.contact-label { color: var(--text-dim); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 1.5px; }
.contact-list a { font-size: 1.1rem; font-weight: 600; transition: color var(--transition); }
.contact-list a:hover { color: var(--accent); }
.contact-socials { display: flex; gap: 18px; }

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row { display: flex; flex-direction: column; gap: 8px; }
.form-row label { font-size: 0.85rem; color: var(--text-dim); font-weight: 600; }
.form-row input, .form-row textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  resize: vertical;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-submit { justify-content: center; margin-top: 4px; }
.form-note { font-size: 0.85rem; color: var(--text-dim); min-height: 1.2em; }
.form-note.success { color: #7fd99a; }
.form-note.error { color: #e17b7b; }

/* -------------------- Footer -------------------- */
.site-footer { padding: 40px 0; border-top: 1px solid var(--border); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-inner p { color: var(--text-dim); font-size: 0.85rem; }
.back-to-top {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.back-to-top:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-3px); }

/* -------------------- Responsive -------------------- */
@media (max-width: 960px) {
  .about-inner, .contact-inner { grid-template-columns: 1fr; }
  .services-grid, .process-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-capabilities { grid-template-columns: repeat(2, 1fr); }
  .ai-case { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(320px, 80vw);
    background: var(--bg-soft);
    border-left: 1px solid var(--border);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 40px;
    gap: 26px;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
  }
  .main-nav.open { transform: translateX(0); }
  .nav-toggle { display: flex; }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .services-grid, .process-grid, .portfolio-grid, .ai-capabilities { grid-template-columns: 1fr; }
  .ai-case-copy, .ai-case-quote { padding: 30px; }
  section { padding: 80px 0; }
}