/* ========================================
   COMPONENTS (Header, Footer, Controls)
   ======================================== */

/* ----------------------------------------
   A. HEADER & LOGO (Desktop)
   ---------------------------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 100;
  padding-top: var(--header-margin-top);
  padding-bottom: calc(var(--grid-baseline) * 6);
  background-color: color-mix(in srgb, var(--color-bg) 50%, transparent); 
  backdrop-filter: blur(8px);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s ease;
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

.header-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  column-gap: var(--grid-gutter);
  align-items: center;
  width: 100%;
  padding: 0 var(--grid-margin);
}

.logo {
  grid-column: 1 / span 4;
  font-family: var(--font-primary);
  font-weight: 400;
  font-size: 1.25rem;        
  line-height: 1.5rem;      
  color: var(--color-accent); 
  text-decoration: none;
  text-transform: lowercase;
  white-space: nowrap;
}

.logo span {
  font-weight: 700;
  font-style: italic;
}

/* Offset per il body poiché l'header è fixed */
body {
  padding-top: calc(var(--header-margin-top) + calc(var(--grid-baseline) * 4) + 1.5rem);
}

/* ----------------------------------------
   B. NAVIGATION LINKS & GAZE EFFECT
   ---------------------------------------- */
.header-nav {
  grid-column: 8 / 13;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0; padding: 0;
  list-style: none;
}

.header-nav li a, 
.mobile-menu-nav li a {
  font-family: var(--font-mono);
  font-size: var(--type-data-size);
  line-height: var(--type-data-lh);
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  
  /* FIX SAFARI: Espande il box del testo per la sfocatura */
  padding: 10px;
  margin: -10px;
  display: inline-block;
  will-change: filter;
  
  transition: filter var(--motion-normal) var(--ease-interaction), 
              opacity var(--motion-normal) var(--ease-interaction),
              color var(--motion-normal) var(--ease-interaction);
}

/* Focus and Blur logic */
.header-nav:has(li a:hover) li a:not(:hover), 
.mobile-menu-nav:has(li a:hover) li a:not(:hover) {
  filter: blur(var(--blur-mid));
  opacity: 0.5;
}

.header-nav li a:hover, 
.mobile-menu-nav li a:hover {
  filter: blur(0);
  opacity: 1;
  color: var(--color-accent);
}

/* ----------------------------------------
   C. HAMBURGER MENU & OVERLAY
   ---------------------------------------- */
.menu-toggle {
  display: none; 
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  position: relative;
  width: 32px;
  height: 20px;
  justify-self: end;
  grid-column: 4 / 5;
}

.menu-circle {
  position: absolute;
  top: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s ease;
}

.menu-circle-left { left: 0; background-color: color-mix(in srgb, var(--color-text) 25%, transparent); }
.menu-circle-right { right: 0; background-color: color-mix(in srgb, var(--color-accent) 25%, transparent); }

.menu-open .menu-circle-left { transform: translateX(6px); }
.menu-open .menu-circle-right { transform: translateX(-6px); }

.mobile-menu-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100dvh;
  bottom: 0;
  background-color: var(--color-bg); 
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(var(--grid-baseline) * 35) var(--grid-margin) var(--footer-margin-bottom);
  opacity: 0; visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.menu-open .mobile-menu-overlay {
  opacity: 1; visibility: visible;
}

.mobile-menu-nav {
  list-style: none;
  padding: 0; margin: 0;
  display: flex; flex-direction: column;
  gap: calc(var(--grid-baseline) * 8); 
}

.mobile-menu-nav li a {
  font-size: 1.5rem;       
  line-height: 2rem;       
}

/* ----------------------------------------
   D. FOOTER
   ---------------------------------------- */
.site-footer {
  width: 100%;
  margin-bottom: var(--footer-margin-bottom);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  column-gap: var(--grid-gutter);
  align-items: center;
  width: 100%;
  padding: 0 var(--grid-margin);
}

.footer-copy {
  grid-column: 1 / span 4;
  font-family: var(--font-mono);
  font-size: var(--type-data-size);
  line-height: var(--type-data-lh);
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0;
}

.footer-credits {
  grid-column: 5 / 13;
  text-align: right;
  font-family: var(--font-mono);
  font-size: var(--type-data-size);
  line-height: var(--type-data-lh);
  text-transform: uppercase;
  color: var(--color-text); 
  margin: 0;
}

.mobile-menu-footer {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: calc(var(--grid-baseline) * 2);
  width: 100%;
  padding: 0;
}

.mobile-menu-footer .footer-copy,
.mobile-menu-footer .footer-credits {
  text-align: left;
  grid-column: auto;
}

/* ----------------------------------------
   E. GLOBAL UI CONTROLS & FIXES
   ---------------------------------------- */
.btn-about-project {
  display: inline-flex;
  align-items: center; justify-content: center;
  background-color: color-mix(in srgb, var(--color-accent) 25%, transparent);
  color: var(--color-text);
  border: none;
  padding: calc(var(--grid-baseline) * 2) calc(var(--grid-baseline) * 4);
  font-family: var(--font-mono);
  font-size: var(--type-data-size);
  line-height: var(--type-data-lh);
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 0.2s ease, opacity 0.2s ease;
}

@media (hover: hover) {
  .btn-about-project:hover { background-color: color-mix(in srgb, var(--color-accent) 35%, transparent); }
}

/* FIX SAFARI LOW POWER MODE */
video:not([onmouseenter])::-webkit-media-controls,
video:not([onmouseenter])::-webkit-media-controls-start-playback-button,
video:not([onmouseenter])::-webkit-media-controls-overlay-play-button {
  display: none !important;
  -webkit-appearance: none !important;
}

/* ----------------------------------------
   F. MEDIA QUERY MOBILE (Components)
   ---------------------------------------- */
@media (max-width: 768px) {
  .logo { grid-column: 1 / span 3; }
  .header-nav { display: none; }
  .menu-toggle { display: block; }
  
  .site-footer .footer-grid {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: calc(var(--grid-baseline) * 2); 
  }
  .site-footer .footer-copy, 
  .site-footer .footer-credits {
    grid-column: auto;
    text-align: left;
  }
}