/* GfG page styles (black & white cyberpunk) */
/* Link after CSS/style.css */

.hero.hero-min { min-height: 48vh; }

/* Toolbar */
.gfg-toolbar {
  position: sticky;
  top: 64px; /* adjust if your header height differs */
  z-index: 5;
  background: rgba(255,255,255,0.02);
  border-top: var(--border-w, 1px) solid var(--line, rgba(255,255,255,0.12));
  border-bottom: var(--border-w, 1px) solid var(--line, rgba(255,255,255,0.12));
  backdrop-filter: blur(4px);
}
.gfg-toolbar .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  padding: 1rem 0;
  align-items: center;
}

.search-input {
  width: 100%;
  background: var(--glass, rgba(255,255,255,0.04));
  color: var(--fg, #fff);
  border: var(--border-w, 1px) solid var(--line, rgba(255,255,255,0.12));
  border-radius: 10px;
  padding: 0.8rem 1rem;
  outline: none;
  transition: box-shadow 200ms ease, background 200ms ease, border-color 200ms ease;
}
.search-input::placeholder { color: var(--muted-weak, rgba(255,255,255,0.52)); }
.search-input:focus {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.22);
  box-shadow: 0 0 0 8px rgba(255,255,255,0.06);
}

.tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  cursor: pointer;
  padding: .5rem .7rem;
  border-radius: 999px;
  border: var(--border-w, 1px) solid var(--line, rgba(255,255,255,0.12));
  color: var(--muted, rgba(255,255,255,0.7));
  background: var(--glass, rgba(255,255,255,0.04));
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease, transform 150ms ease;
  user-select: none;
}
.tag:hover { transform: translateY(-1px); background: rgba(255,255,255,0.06); color: var(--fg, #fff); }
.tag:focus-visible { outline: 2px dashed var(--fg, #fff); outline-offset: 3px; }
.tag[aria-pressed="true"] { color: var(--fg, #fff); border-color: rgba(255,255,255,0.25); background: rgba(255,255,255,0.08); }

/* Section spacing */
.gfg-section { padding: clamp(2rem, 5vw, 3rem) 0 clamp(3rem, 6vw, 4rem); }

/* Grid */
.gfg-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2.5vw, 1.4rem);
}
@media (max-width: 1100px) { .gfg-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 780px)  { 
  .gfg-toolbar .container { grid-template-columns: 1fr; gap: .75rem; }
  .gfg-grid { grid-template-columns: 1fr; }
}

/* Cards */
.gfg-card { display: grid; grid-template-rows: auto 1fr; text-decoration: none; }

/* Thumbnail */
.thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: var(--border-w, 1px) solid var(--line, rgba(255,255,255,0.12));
  background: rgba(255,255,255,0.03);
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: grayscale(1) contrast(1.05) brightness(0.9);
  transform: scale(1.01);
  transition: transform 260ms ease, filter 260ms ease, opacity 260ms ease;
  opacity: 0.92;
  padding: .6rem;
}
.gfg-card:hover .thumb img {
  transform: scale(1.03);
  filter: grayscale(1) contrast(1.15) brightness(1);
  opacity: 1;
}

/* Content */
.card-inner { padding: 1rem 1rem 1.1rem; }
.meta {
  color: var(--muted-weak, rgba(255,255,255,0.52));
  font-size: .88rem;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.title {
  margin: .35rem 0 .3rem;
  font-size: 1.15rem;
  line-height: 1.25;
  color: var(--fg, #fff);
}
.excerpt {
  margin: .15rem 0 .6rem;
  color: var(--muted, rgba(255,255,255,0.7));
  font-size: .98rem;
}

/* Badges */
.thm-badges { display: flex; flex-wrap: wrap; gap: .4rem; }
.chip {
  display: inline-flex;
  align-items: center;
  padding: .25rem .55rem;
  border-radius: 999px;
  border: var(--border-w, 1px) solid var(--line, rgba(255,255,255,0.12));
  background: var(--glass, rgba(255,255,255,0.04));
  color: var(--muted, rgba(255,255,255,0.75));
  font-size: .78rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.chip--easy   { border-color: rgba(255,255,255,0.22); background: rgba(255,255,255,0.06); color: #fff; }
.chip--med    { border-color: rgba(255,255,255,0.28); background: rgba(255,255,255,0.08); color: #fff; }
.chip--hard   { border-color: rgba(255,255,255,0.35); background: rgba(255,255,255,0.10); color: #fff; }

/* Arrow hover */
.card .arrow { margin-top: .2rem; display: inline-block; transition: transform 200ms ease; }
.gfg-card:hover .arrow { transform: translateX(4px); }