/* ==========================================================
   Header for the inner pages (about / work / contact)
   Desktop: logo + Work / About / Contact links, top left.
   Phones:  logo + hamburger button; the menu holds the links AND the social icons.
   EDIT THESE FIRST
   ========================================================== */
:root {
  --header-top: clamp(1.1rem, 2.4vw, 2rem);        /* distance from the top edge */
  --header-x: clamp(1.25rem, 3vw, 2.5rem);         /* distance from the left / right edge */
  --header-gap: clamp(1.5rem, 2.6vw, 2.4rem);      /* space between the logo and the links, and between the links */
  --logo-w: 2.3rem;                                /* logo size */
  --menu-break: 860px;                             /* below this width the hamburger menu is used (also set in the @media lines below) */
}

.site-header {
  position: fixed;
  top: var(--header-top);
  left: var(--header-x);
  z-index: 9100;
  display: flex;
  align-items: center;
  gap: var(--header-gap);
  font-family: var(--font);
}

/* ---------- Logo (the three-piece mark). On hover it redraws itself as a little house. ---------- */
.home-link {
  display: block;
  width: var(--logo-w);
  line-height: 0;
  opacity: 0.85;
  transition: opacity 0.3s ease;
}
.home-link:hover, .home-link:focus-visible { opacity: 1; }
.home-link:focus-visible { outline: 1px solid var(--accent); outline-offset: 5px; }
.home-mark { display: block; width: 100%; height: auto; overflow: visible; filter: drop-shadow(0 0 6px rgba(0, 255, 185, 0.28)); }

.home-mark .mark { fill: var(--accent); transform-box: fill-box; transform-origin: center; transition: opacity 0.14s ease 0.05s, transform 0.2s ease; }
.home-mark .house path {
  fill: none;
  stroke: var(--accent);
  stroke-width: 15;
  stroke-linecap: butt;
  stroke-linejoin: miter;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  opacity: 0;
  transition: stroke-dashoffset 0.12s ease, opacity 0s linear 0.12s;
}
@media (hover: hover) {
  .home-link:hover .mark, .home-link:focus-visible .mark { opacity: 0; transform: scale(0.88); transition-delay: 0s; }
  .home-link:hover .house path, .home-link:focus-visible .house path {
    stroke-dashoffset: 0;
    opacity: 1;
    transition: stroke-dashoffset 0.2s cubic-bezier(0.3, 0.7, 0.3, 1), opacity 0s;
  }
  .home-link:hover .house path:nth-child(1), .home-link:focus-visible .house path:nth-child(1) { transition-delay: 0.04s, 0s; }
  .home-link:hover .house path:nth-child(2), .home-link:focus-visible .house path:nth-child(2) { transition-delay: 0.14s, 0s; }
  .home-link:hover .house path:nth-child(3), .home-link:focus-visible .house path:nth-child(3) { transition-delay: 0.24s, 0s; }
}
/* While the "back to home" transition starts, show the normal logo (so the animation grows out of it cleanly). */
.home-link.tr-leaving .mark { opacity: 1 !important; transform: none !important; transition: none !important; }
.home-link.tr-leaving .house path { opacity: 0 !important; transition: none !important; }

/* ---------- Links next to the logo ---------- */
.site-nav { display: flex; align-items: center; gap: var(--header-gap); }
.site-nav a {
  position: relative;
  padding: 0.35rem 0;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.045em;
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color 0.3s ease;
}
.site-nav a::after {                               /* thin green underline that grows in on hover / on the current page */
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(0, 255, 185, 0.7);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.22, 0.8, 0.2, 1);
}
.site-nav a:hover, .site-nav a:focus-visible, .site-nav a[aria-current="page"] { color: var(--accent); }
.site-nav a:hover::after, .site-nav a:focus-visible::after, .site-nav a[aria-current="page"]::after { transform: scaleX(1); }
.site-nav a:focus-visible { outline: none; }

/* ---------- Hamburger + phone menu (hidden on desktop) ---------- */
.menu-toggle, .mobile-menu { display: none; }

@media (max-width: 860px) {
  :root { --logo-w: 2.15rem; }

  .site-header { right: var(--header-x); justify-content: space-between; }
  .site-nav { display: none; }

  .menu-toggle {
    position: relative;
    display: block;
    width: 2.75rem;
    height: 2.75rem;
    margin-right: -0.7rem;                          /* lines up the three bars with the page edge */
    padding: 0;
    border: 0;
    background: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }
  .menu-toggle span {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 1.45rem;
    height: 2px;
    margin: -1px 0 0 -0.725rem;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.92);
    transition: transform 0.35s cubic-bezier(0.22, 0.8, 0.2, 1), opacity 0.2s ease, background-color 0.3s ease;
  }
  .menu-toggle span:nth-child(1) { transform: translateY(-6px); }
  .menu-toggle span:nth-child(3) { transform: translateY(6px); }
  html.menu-open .menu-toggle span { background: var(--accent); }
  html.menu-open .menu-toggle span:nth-child(1) { transform: rotate(45deg); }
  html.menu-open .menu-toggle span:nth-child(2) { opacity: 0; transform: scaleX(0.4); }
  html.menu-open .menu-toggle span:nth-child(3) { transform: rotate(-45deg); }
  .menu-toggle:focus-visible { outline: 1px solid var(--accent); outline-offset: 0; border-radius: 6px; }

  .mobile-menu {
    position: fixed;
    inset: 0;
    z-index: 9000;
    display: block;
    visibility: hidden;
    opacity: 0;
    background:
      radial-gradient(70% 45% at 50% 38%, rgba(0, 255, 185, 0.09), transparent 70%),
      rgba(9, 12, 15, 0.95);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
  }
  html.menu-open .mobile-menu { visibility: visible; opacity: 1; transition: opacity 0.3s ease; }
  html.menu-open { overflow: hidden; }

  .mobile-menu nav {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: clamp(1.1rem, 3.6dvh, 1.7rem);
    padding-bottom: 14dvh;                          /* sits a little above center; the icons fill the space below */
  }
  .mobile-menu nav a {
    padding: 0.3rem 0.6rem;
    font-family: var(--font);
    font-size: clamp(1.7rem, 7.2vw, 2.3rem);
    font-weight: 600;
    letter-spacing: 0.03em;
    color: rgba(255, 255, 255, 0.88);
    text-decoration: none;
    opacity: 0;
    transform: translateY(12px);
    transition: color 0.25s ease, opacity 0.3s ease, transform 0.3s ease;
  }
  html.menu-open .mobile-menu nav a { opacity: 1; transform: none; transition: color 0.25s ease, opacity 0.45s ease, transform 0.5s cubic-bezier(0.22, 0.8, 0.2, 1); }
  html.menu-open .mobile-menu nav a:nth-child(1) { transition-delay: 0s, 0.08s, 0.08s; }
  html.menu-open .mobile-menu nav a:nth-child(2) { transition-delay: 0s, 0.15s, 0.15s; }
  html.menu-open .mobile-menu nav a:nth-child(3) { transition-delay: 0s, 0.22s, 0.22s; }
  .mobile-menu nav a:hover, .mobile-menu nav a:focus-visible, .mobile-menu nav a[aria-current="page"] { color: var(--accent); outline: none; }

  /* The page's own social icons (same element, no copy) move to the bottom of the open menu and stay hidden otherwise. */
  html main .social {
    --social-color: rgba(255, 255, 255, 0.72);
    --social-icon-size: 1.5rem;
    position: fixed;
    top: auto;
    right: auto;
    left: 50%;
    bottom: calc(2.4rem + env(safe-area-inset-bottom, 0px));
    transform: translateX(-50%);
    margin: 0;
    padding: 0;
    z-index: 9050;
    gap: 0.3rem 1.5rem;
    justify-content: center;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.25s ease, visibility 0s linear 0.25s;
  }
  html.menu-open main .social { visibility: visible; opacity: 1; transition: opacity 0.45s ease 0.3s; }
  html main .social .icon { filter: none; }
}

@media (prefers-reduced-motion: reduce) {
  .home-mark .mark, .home-mark .house path, .site-nav a::after, .menu-toggle span,
  .mobile-menu, .mobile-menu nav a, html main .social { transition: none !important; }
}