/* header.css */

/* Header & Navigation Styles */
:root {
  --nav-height: 3rem;
  --nav-horizontal-padding: 1rem;
  --pill-background: rgba(0, 0, 0, 0.5);
  --pill-text-color: white;
  --pill-active-color: white;
  --pill-indicator-color: rgba(255, 255, 255, 0.3);
  --back-button-size-desktop: 48px;
  --back-button-size-mobile: 40px;
  --icon-size-standard: 28px;
  --icon-size-small: 24px;
}

/* Header container */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  pointer-events: none;
  transition: opacity 0.3s ease;
  height: 6rem;
  background: transparent;
}

.header.scrolled {
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
}

/* Pill-shaped header */
.pill-header {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
  opacity: 1; /* Always visible */
  visibility: visible; /* Always visible */
  pointer-events: auto; /* Always interactive */
  width: auto;
  max-width: 90%;
}

/* Header toggle state */
.pill-header.hidden {
  transform: translateX(-50%) translateY(-150%);
  opacity: 0;
  visibility: hidden;
}

.pill-nav {
  background-color: var(--pill-background);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 999px;
  padding: 0 var(--nav-horizontal-padding);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.pill-header .nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  height: var(--nav-height);
  align-items: center;
}

.pill-header .nav-item {
  position: relative;
  margin: 0 0.5rem;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  font-weight: 500;
}

.pill-header .nav-item:first-child {
  margin-left: 0;
}

.pill-header .nav-item:last-child {
  margin-right: 0;
}

.pill-header .nav-link {
  font-family: var(--font-primary);
  color: var(--pill-text-color);
  text-decoration: none;
  font-size: 1rem;
  padding: var(--pill-shape-padding);
  display: block;
  border-radius: 999px;
  transition: color 0.3s ease;
  white-space: nowrap;
  position: relative;
  z-index: 2;
}

.pill-header .nav-item:first-child .nav-link {
  padding-left: calc(var(--nav-horizontal-padding) - 0.25rem);
}

.pill-header .nav-item:last-child .nav-link {
  padding-right: calc(var(--nav-horizontal-padding) - 0.25rem);
}

.pill-header .nav-link.active {
  color: var(--pill-active-color);
}

.pill-indicator {
  position: absolute;
  height: 2rem;
  background-color: var(--pill-indicator-color);
  border-radius: 999px;
  transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1),
    width 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  z-index: 1;
  bottom: 0.5rem;
  left: 0;
  pointer-events: none;
  opacity: 0; /* Start with hidden indicator */
}

/* Back button styles for project pages */
.back-button {
  position: fixed;
  top: 1.5rem;
  left: 1.5rem; /* Changed from -4rem to 1.5rem to be visible initially */
  z-index: 1000;
  width: var(--back-button-size-desktop);
  height: var(--back-button-size-desktop);
  background: var(--pill-background);
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: opacity 0.4s ease, visibility 0.4s ease, transform 0.2s ease;
  opacity: 1; /* Set to 1 to be visible by default */
  visibility: visible; /* Set to visible by default */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  pointer-events: auto;
  mix-blend-mode: difference;
}

.back-button.visible {
  opacity: 1;
  visibility: visible;
}

.back-button svg {
  width: 24px;
  height: 24px;
  transform: rotate(0);
}

/* Hide back button when model viewer is in fullscreen mode */
.model-viewer-wrapper.fullscreen ~ .back-button {
  opacity: 0 !important;
  visibility: hidden !important;
  z-index: -1 !important;
}

/* Header Toggle Button */
.header-toggle {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 1001;
  width: var(--back-button-size-desktop);
  height: var(--back-button-size-desktop);
  background: var(--pill-background);
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: opacity 0.3s ease, transform 0.3s ease;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  pointer-events: auto;
  mix-blend-mode: difference;
}

.header-toggle svg {
  width: 24px;
  height: 24px;
}

.header-toggle:hover {
  transform: scale(1.05);
}

.header-toggle:active {
  transform: scale(0.95);
}

/* Media Queries */
@media (max-width: 768px) {
  :root {
    --nav-height: 2.5rem;
    --nav-horizontal-padding: 0.75rem; /* Increased from 0.5rem for better spacing */
  }

  .pill-header {
    top: 1rem;
    width: auto; /* Changed from 50% to auto */
    max-width: 80%; /* Reduced from 90% to 80% */
    left: 50%;
    transform: translateX(-50%);
  }

  /* Make header even narrower on project pages */
  .project-page .pill-header {
    max-width: 75%; /* Narrower specifically for project pages */
  }

  .pill-header.hidden {
    transform: translateX(-50%) translateY(-150%);
  }

  .pill-header .nav-item {
    margin: 0 0.35rem; /* Adjusted margins for better centering */
  }

  .pill-header .nav-link {
    font-size: 0.9rem;
    padding: 0.25rem 0.9rem; /* Explicitly set padding instead of using var */
  }

  /* Ensure first item (Work) has consistent padding */
  .pill-header .nav-item:first-child .nav-link {
    padding-left: 0.9rem; /* Match other items for consistency */
  }

  .pill-header .nav-item:last-child .nav-link {
    padding-right: 0.9rem; /* Match other items for consistency */
  }

  .back-button {
    top: 1rem;
    left: 1rem; /* Ensure visible on mobile */
    width: var(--back-button-size-mobile);
    height: var(--back-button-size-mobile);
  }

  .header-toggle {
    top: 1rem;
    right: 1rem;
    width: var(--back-button-size-mobile);
    height: var(--back-button-size-mobile);
  }

  .pill-indicator {
    height: 1.9rem;
    bottom: 0.3rem;
  }

  .back-button svg,
  .header-toggle svg {
    width: 20px;
    height: 20px;
  }
}

@media (max-width: 480px) {
  .pill-header {
    width: auto; /* Changed from 95% to auto */
    max-width: 85%;
    left: 50%;
    transform: translateX(-50%);
  }

  /* Make header even narrower on smaller screens for project pages */
  .project-page .pill-header {
    max-width: 70%;
  }

  .pill-header.hidden {
    transform: translateX(-50%) translateY(-150%);
  }

  .pill-header .nav-link {
    font-size: 0.8rem;
    padding: 0.25rem 0.8rem; /* Consistent padding for all nav items */
  }

  /* Make sure first and last items also have consistent padding */
  .pill-header .nav-item:first-child .nav-link {
    padding-left: 0.8rem;
  }

  .pill-header .nav-item:last-child .nav-link {
    padding-right: 0.8rem;
  }

  /* Reduce margins between items for even smaller screens */
  .pill-header .nav-item {
    margin: 0 0.25rem;
  }

  .pill-indicator {
    height: 1.8rem;
    bottom: 0.35rem;
  }
}