/* ===============================
   Navigation Bar
   =============================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  height: var(--nav-height);
  background: rgba(247, 244, 239, 0.0);
  backdrop-filter: blur(0px);
  transition: background .3s ease, backdrop-filter .3s ease, box-shadow .3s ease;
}

/* When user scrolls down, nav gets a frosted glass background */
.site-nav.scrolled {
  background: rgba(247, 244, 239, 0.88);
  backdrop-filter: saturate(1.2) blur(14px);
  box-shadow: 0 1px 0 rgba(10,10,10,.06);
}

.nav__inner {
  height: 100%;
  width: var(--container);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}

/* =========================================
   Logo + Three.js Sphere
   ========================================= */
.nav__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-text {
  display: inline-flex;
  align-items: baseline;
  font-size: clamp(24px, 3vw, 40px);
  letter-spacing: -0.02em;
  
  /* The Fixes */
  transform-origin: center; /* Ensures growth starts from the middle */
  will-change: transform;   /* Improves performance for smooth scaling */
  
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.nav__logo:hover .nav__logo-text {
  /* translateY moves it up, scale grows it. 
     Combined, it should now stay centered. */
  transform: translateY(-4px) scale(1.03);
}

/* Common setup for the "Swoop" paint effect */
.logo-letters, 
.logo-four {
  background-size: 250% 100%;
  background-position: 100% 0;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: background-position 0.45s ease-out;
}

/* LETTERS: Cormorant SC Bold (#1a1a1a) */
.logo-letters {
  font-family: "Cormorant SC", serif;
  font-weight: 700;
  /* Hover: #f5c842 | Default: #1a1a1a */
  background-image: linear-gradient(115deg, #f5c842 50%, #1a1a1a 50%);
}

/* NUMBER 4: Jost Regular (#f5c842) */
.logo-four {
  font-family: "Jost", sans-serif;
  font-weight: 300;
  padding: 0 1px;
  font-size: clamp(34px, 3vw, 43px);
  /* Hover: #1a1a1a | Default: #f5c842 */
  background-image: linear-gradient(110deg, #1a1a1a 50%, #f5c842 50%);
}

/* Trigger the "Swoop" paint-over on hover */
.nav__logo:hover .logo-letters,
.nav__logo:hover .logo-four {
  background-position: 0 0; 
}

.nav__sphere {
  width: 36px;
  height: 36px;
  display: block;
  flex-shrink: 0;
}

/* ===============================
   Nav Links
   =============================== */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
  flex: 1;
  flex-wrap: wrap;
}

.nav__link {
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(10,10,10,.85);
  text-decoration: none;
  transition: color .2s ease, background .2s ease;
  white-space: nowrap;
}

.nav__link:hover { color: #0A0A0A; background: rgba(10,10,10,.08); }
.site-nav.scrolled .nav__link { color: var(--text); }
.site-nav.scrolled .nav__link:hover { color: var(--accent-dark); background: rgba(10,10,10,.06); }

/* Active link */
.nav__link.active {
  color: #0A0A0A;
  background: rgba(10,10,10,.1);
  font-weight: 600;
}
.site-nav.scrolled .nav__link.active {
  color: var(--accent-dark);
  background: rgba(253,183,62,.18);
}

/* ===============================
   Mobile Adjustments
   =============================== */
@media (max-width: 680px) {
  .nav__sphere { display: none; }
  .nav__logo-text { font-size: clamp(20px, 5vw, 28px); }
  .nav__link { padding: 5px 8px; font-size: 13px; }
  .nav__inner { gap: 8px; }
}

/* Body padding so content doesn't go under fixed nav */
body { padding-top: var(--nav-height); }

/* ===============================
   Burger Menu (mobile only, on
   pages with class has-burger-nav)
   =============================== */

/* Burger button — hidden by default, shown on mobile for burger pages */
.nav__burger {
  display: none;
}

@media (max-width: 680px) {
  /* Hide regular nav links and floating CTA on burger pages */
  body.has-burger-nav .nav__menu { display: none; }
  body.has-burger-nav:not(.show-floating-cta) .cta-floating { display: none !important; }

  /* Show burger button */
  body.has-burger-nav .nav__burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    margin-left: auto;
    background: transparent;
    border: none;
    padding: 8px;
    cursor: pointer;
    z-index: 600;
    width: 40px;
    height: 40px;
  }

  body.has-burger-nav .nav__burger-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
    transform-origin: center;
  }

  /* Animate burger to X when open */
  body.has-burger-nav .nav__burger.open .nav__burger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  body.has-burger-nav .nav__burger.open .nav__burger-bar:nth-child(2) {
    opacity: 0;
  }
  body.has-burger-nav .nav__burger.open .nav__burger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

/* Mobile dropdown menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(247, 244, 239, 0.97);
  backdrop-filter: saturate(1.2) blur(14px);
  -webkit-backdrop-filter: saturate(1.2) blur(14px);
  border-bottom: 1px solid rgba(10, 10, 10, 0.08);
  z-index: 490;
  flex-direction: column;
  padding: 16px 20px 20px;
  gap: 4px;
  box-shadow: 0 8px 24px rgba(10, 10, 10, 0.1);
}

.nav__mobile-menu.open {
  display: flex;
}

.nav__mobile-link {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s ease;
}
.nav__mobile-link:hover,
.nav__mobile-link:active {
  background: rgba(10, 10, 10, 0.07);
}
.nav__mobile-link.active {
  color: var(--accent-dark);
  font-weight: 600;
  background: rgba(253, 183, 62, 0.15);
}

/* "Контакты" CTA in mobile menu */
.nav__mobile-cta {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 13px 20px;
  background: transparent;
  color: var(--accent-dark);
  border: 1.5px solid var(--accent-dark);
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  text-align: center;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.2s ease;
}
.nav__mobile-cta:hover,
.nav__mobile-cta:active {
  background: rgba(10, 10, 10, 0.07);
}