/* ==========================================================================
   MARCO ZULIANI - Fotografo
   Minimalist Base Stylesheet (Exact Talva Replica)
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.2s ease, color 0.2s ease;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

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

/* ==========================================================================
   HEADER TALVA (Exact Layout: Brand a sinistra, Nav adiacente, Icone a destra)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0 var(--header-padding);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 3.5vw, 3rem);
}

.brand-title {
  font-size: clamp(1.2rem, 1.8vw, 1.55rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--text-primary);
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 1.8rem);
}

.nav-item {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--filter-inactive);
  transition: color 0.2s ease;
  cursor: pointer;
}

.nav-item:hover,
.nav-item.active {
  color: var(--filter-active);
  font-weight: 500;
}

/* Header Destra: Toggle Giorno/Sera e Icone Social */
.header-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* Toggle Giorno / Sera */
.theme-toggle-box {
  display: flex;
  align-items: center;
  background-color: var(--toggle-bg);
  padding: 3px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
}

.theme-toggle-btn {
  padding: 4px 10px;
  border-radius: 16px;
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.theme-toggle-btn.active {
  background-color: var(--toggle-active-bg);
  color: var(--toggle-active-text);
  font-weight: 600;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--icon-color);
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.social-icon:hover {
  opacity: 1;
}

.social-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Mobile Menu Button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-primary);
}

@media (max-width: 900px) {
  .site-header {
    height: 70px;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem var(--header-padding);
    gap: 1.25rem;
  }

  .site-nav.open {
    display: flex;
  }

  .mobile-toggle {
    display: block;
  }
}