/* ============================================================
   UI Core — Page Transitions & Mobile Menu
   ============================================================ */

/* Page Transitions */
body {
  opacity: 0;
  transition: opacity 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}
body.page-loaded {
  opacity: 1;
}

/* Hamburger Button */
.hamburger {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001; /* Above the drawer */
  position: relative;
  width: 44px;
  height: 44px;
}

.hamburger-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--brown-dark, #1b2f42);
  margin: 5px auto;
  transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
  border-radius: 2px;
}

.hamburger.is-active .hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-active .hamburger-line:nth-child(2) {
  opacity: 0;
}
.hamburger.is-active .hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Base states for desktop (navLinks visible, drawer background not needed) */
.mobile-drawer-bg {
  display: none;
}
.mobile-drawer-cta {
  display: none !important;
}

/* Mobile Layout overrides */
@media (max-width: 900px) {
  .hamburger {
    display: block;
  }
  
  .nav-cta {
    display: none; /* We will move CTA inside the drawer, or just hide the header one */
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 85%;
    max-width: 400px;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 2rem;
    transition: right 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    z-index: 1000;
  }

  .main-nav.is-open {
    right: 0;
  }

  .main-nav a {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .main-nav.is-open a {
    opacity: 1;
    transform: translateX(0);
  }
  
  /* Stagger the animation for nav links */
  .main-nav.is-open a:nth-child(1) { transition-delay: 0.1s; }
  .main-nav.is-open a:nth-child(2) { transition-delay: 0.15s; }
  .main-nav.is-open a:nth-child(3) { transition-delay: 0.2s; }
  .main-nav.is-open a:nth-child(4) { transition-delay: 0.25s; }
  .main-nav.is-open a:nth-child(5) { transition-delay: 0.3s; }
  
  /* Append CTA style for mobile drawer */
  .main-nav .btn.primary {
    margin-top: 1rem;
    font-size: 1.1rem;
    padding: 0.8rem 1.6rem;
    width: 100%;
    text-align: center;
    opacity: 0;
    transform: translateX(20px);
    display: inline-flex !important;
  }
  
  .main-nav.is-open .btn.primary {
    opacity: 1;
    transform: translateX(0);
    transition-delay: 0.35s;
  }

  /* Overlay */
  .mobile-drawer-bg {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(15, 25, 36, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
  }

  .mobile-drawer-bg.is-open {
    opacity: 1;
    pointer-events: all;
  }
  
  /* Make sure header brand stays above overlay */
  .site-header {
    z-index: 1002;
  }
}