/* =========================================================
   Roberto Vannacci — Archivio Digitale
   style.css — Custom styles (Tailwind extended)
   ========================================================= */

/* ---------- Base ---------- */
html { scroll-behavior: smooth; }

body {
  background-color: #fbfaee;
  color: #1b1c15;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Google Material Symbols ---------- */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* ---------- Typography helpers ---------- */
.serif-text { font-family: 'Newsreader', serif; }

.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

/* ---------- Navigation ---------- */
.nav-link-active {
  color: #ad302f;
  border-bottom: 2px solid #ad302f;
  font-weight: 700;
}

/* ---------- Mobile menu ---------- */
#mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  background-color: #fbfaee;
  padding: 7rem 2rem 2rem;
  flex-direction: column;
  gap: 2rem;
}
#mobile-menu.open { display: flex; }

/* ---------- Scroll-triggered fade animations ---------- */
@media (prefers-reduced-motion: no-preference) {
  .animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- Article drop-cap ---------- */
.prose .drop-cap::first-letter {
  float: left;
  font-size: 4.5rem;
  line-height: 0.85;
  font-weight: 900;
  margin-right: 0.125em;
  font-family: 'Newsreader', serif;
  color: #000000;
}

/* ---------- Article blockquote ---------- */
.editorial-blockquote {
  position: relative;
  padding: 3rem 2rem;
  border-top: 1px solid rgba(196,199,199,0.3);
  border-bottom: 1px solid rgba(196,199,199,0.3);
  margin: 4rem 0;
}
.editorial-blockquote::before {
  content: '\201C';
  position: absolute;
  top: 1rem;
  left: 0;
  font-size: 4rem;
  font-family: 'Newsreader', serif;
  color: rgba(173,48,47,0.2);
  line-height: 1;
}

/* ---------- Image hover: colour reveal ---------- */
.img-reveal {
  filter: grayscale(1);
  transition: filter 0.7s ease;
}
.img-reveal:hover, .group:hover .img-reveal { filter: grayscale(0); }

/* ---------- Button states ---------- */
.btn-primary {
  background-color: #000000;
  color: #ffffff;
  padding: 1rem 2.5rem;
  font-family: 'Work Sans', sans-serif;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.btn-primary:hover  { opacity: 0.85; transform: translateY(-1px); }
.btn-primary:active { opacity: 0.75; transform: translateY(0); }

.btn-secondary {
  background-color: #ad302f;
  color: #ffffff;
  padding: 1.25rem 2.5rem;
  font-family: 'Work Sans', sans-serif;
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: filter 0.2s ease;
}
.btn-secondary:hover { filter: brightness(1.1); }

/* ---------- Form inputs ---------- */
.editorial-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(196,199,199,0.6);
  outline: none;
  font-family: 'Work Sans', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  padding: 1rem 0;
  width: 100%;
  color: #1b1c15;
  transition: border-color 0.2s ease;
}
.editorial-input:focus { border-color: #000000; }
.editorial-input::placeholder { color: #747878; }

/* ---------- Timeline grid gap ---------- */
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background-color: rgba(196,199,199,0.1);
}
@media (max-width: 768px) {
  .timeline-grid { grid-template-columns: 1fr; }
}

/* ---------- Sticky sidebar ---------- */
@media (min-width: 1024px) {
  .sticky-sidebar { position: sticky; top: 10rem; }
}