/* ==========================================================================
   eWasteGang — site.css
   Small custom layer that sits ON TOP of Tailwind (loaded via CDN).
   Tailwind does 95% of the work; this file holds the handful of things
   Tailwind utilities can't express cleanly: brand tokens, the teardown
   callout lines, the accepted-items marquee, and scroll reveals.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. BRAND TOKENS
   Change a colour here and it updates everywhere on every page.
   -------------------------------------------------------------------------- */
:root {
  --ink:      #070C15;   /* page background — near-black navy */
  --panel:    #101B2C;   /* raised card surface */
  --panel-2:  #16233A;   /* hover / nested surface */
  --line:     #23324B;   /* hairline borders */
  --circuit:  #35E08A;   /* primary: vibrant circuit-trace green */
  --volt:     #4CC9FF;   /* secondary: electric blue */
  --platter:  #C7D3E3;   /* body text — cool hard-drive-platter grey */
  --solder:   #F4B740;   /* warning / "we can't take this" amber */
}

/* Set the background before Tailwind's CDN script finishes parsing so the
   page never flashes white on first paint. */
html { background-color: var(--ink); }

body {
  background-color: var(--ink);
  color: var(--platter);
  -webkit-font-smoothing: antialiased;
}

/* --------------------------------------------------------------------------
   2. TYPOGRAPHY ROLES
   Display = Space Grotesk (technical, a little mechanical)
   Body    = IBM Plex Sans (warm, readable, engineering-adjacent)
   Utility = IBM Plex Mono (eyebrows, labels, data, wallet addresses)
   -------------------------------------------------------------------------- */
.font-display { font-family: 'Space Grotesk', system-ui, sans-serif; }
.font-body    { font-family: 'IBM Plex Sans', system-ui, sans-serif; }
.font-mono2   { font-family: 'IBM Plex Mono', ui-monospace, monospace; }

/* Small uppercase mono label used above section headings. */
.eyebrow {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--volt);
}

/* --------------------------------------------------------------------------
   3. SIGNATURE ELEMENT — TEARDOWN CALLOUTS
   The hero photo is annotated like a technical teardown diagram: hairline
   leader lines pointing at real parts in the picture. Hidden below md so
   small screens just get the photograph.
   -------------------------------------------------------------------------- */
.teardown { position: relative; }

.callout {
  position: absolute;
  display: none;                 /* revealed at md+ via the rule below */
  align-items: center;
  gap: 0.5rem;
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #EAF2FF;
  white-space: nowrap;
  z-index: 3;
}

/* The dot that sits on the part being labelled. */
.callout::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 999px;
  background: var(--circuit);
  box-shadow: 0 0 0 4px rgba(53, 224, 138, 0.22);
  flex: none;
}

.callout span {
  background: rgba(7, 12, 21, 0.82);
  border: 1px solid var(--line);
  border-left: 2px solid var(--volt);
  padding: 0.3rem 0.55rem;
  backdrop-filter: blur(4px);
}

/* Only on wide screens: the labels need room to sit over the photo
   without covering the student's face. */
@media (min-width: 1024px) {
  .callout { display: flex; }
}

/* --------------------------------------------------------------------------
   4. ACCEPTED-ITEMS MARQUEE
   A slow ticker of the hardware we actually take. It's decoration that
   carries real information, so it earns its place.
   -------------------------------------------------------------------------- */
.marquee { overflow: hidden; }

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 48s linear infinite;
}

.marquee:hover .marquee__track { animation-play-state: paused; }

@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* --------------------------------------------------------------------------
   5. SCROLL REVEAL (driven by site.js)
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   6. SMALL COMPONENTS
   -------------------------------------------------------------------------- */

/* Circuit-trace hairline used to separate major bands. */
.trace-rule {
  height: 1px;
  background: linear-gradient(90deg,
    transparent, var(--line) 15%, var(--circuit) 50%, var(--line) 85%, transparent);
  opacity: 0.55;
}

/* Card lift on hover. */
.card-lift { transition: transform 0.25s ease, border-color 0.25s ease; }
.card-lift:hover { transform: translateY(-4px); border-color: var(--circuit); }

/* Photo tiles: images start slightly desaturated and come to full colour
   on hover, so the grid reads as one texture until you engage with it. */
.photo-tile img {
  transition: transform 0.5s ease, filter 0.5s ease;
  filter: saturate(0.85) contrast(1.03);
}
.photo-tile:hover img { transform: scale(1.04); filter: none; }

/* Active nav link marker. */
.nav-link { position: relative; }
.nav-link[aria-current="page"] { color: var(--circuit); }
.nav-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--circuit);
}

/* <details> disclosure arrow tint. */
details > summary { cursor: pointer; list-style: none; }
details > summary::-webkit-details-marker { display: none; }

/* --------------------------------------------------------------------------
   7. ACCESSIBILITY FLOOR
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--circuit);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  padding: 0.6rem 1rem;
  background: var(--circuit);
  color: var(--ink);
  font-weight: 600;
}

/* Honour the OS "reduce motion" setting: kill the ticker and the reveals. */
@media (prefers-reduced-motion: reduce) {
  .marquee__track { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card-lift, .photo-tile img { transition: none; }
  html { scroll-behavior: auto; }
}

html { scroll-behavior: smooth; }

/* Offset anchor targets so the sticky header doesn't cover headings. */
[id] { scroll-margin-top: 6rem; }