/* Greybox Phase 4 — homepage shelves + content cards.
 * Consumes Phase 1 tokens (css/tokens.css). No red, no neon, no clutter.
 * Amber accent used sparingly (rating star, in-list state, focus ring via
 * the global :focus-visible rule). Vanilla CSS, no library. */

#grid .card { width: 100%; }

/* ---------------- section header ---------------- */

.gx-shelf { margin-top: 2.75rem; min-width: 0; }
.gx-shelf:first-child { margin-top: 2rem; }

.gx-shelf-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.9rem;
  min-width: 0;
}

.gx-shelf-titles { min-width: 0; }

.gx-shelf-title,
#section-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--gx-text);
  margin: 0;
}

.gx-shelf-desc {
  margin: 0.25rem 0 0;
  font-size: 0.83rem;
  color: var(--gx-text-dim);
  max-width: 46rem;
}

.gx-viewall {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--gx-text-dim);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.25rem 0;
  transition: color var(--gx-transition);
}

.gx-viewall .gx-viewall-arrow {
  display: inline-block;
  transition: transform var(--gx-transition);
}

.gx-viewall:hover { color: var(--gx-text); }
.gx-viewall:hover .gx-viewall-arrow { transform: translateX(3px); }

/* ---------------- shelf carousel ---------------- */

.gx-shelf-viewport {
  position: relative;
  margin: 0;
  min-width: 0;
}

.gx-shelf-track {
  display: flex;
  gap: 0.9rem;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.35rem 0.15rem 0.9rem;
  margin: 0 -0.15rem;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  overscroll-behavior-x: contain;
}

.gx-shelf-track::-webkit-scrollbar { display: none; }

.gx-shelf-track > .card {
  flex: 0 0 auto;
  width: clamp(132px, 24vw, 184px);
}

/* Whisper-quiet edge fades, only while there is more to see */
.gx-shelf-viewport::before,
.gx-shelf-viewport::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0.9rem;
  width: 2.2rem;
  z-index: 2;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--gx-transition);
}

.gx-shelf-viewport::before {
  left: 0;
  background: linear-gradient(to right, rgba(7, 7, 12, 0.65), transparent);
}

.gx-shelf-viewport::after {
  right: 0;
  background: linear-gradient(to left, rgba(7, 7, 12, 0.65), transparent);
}

.gx-shelf-viewport[data-overflow="true"]:not([data-at-start="true"])::before { opacity: 1; }
.gx-shelf-viewport[data-overflow="true"]:not([data-at-end="true"])::after { opacity: 1; }

/* Unobtrusive arrow controls: hover/focus only, never huge, never on touch */
.gx-shelf-btn {
  position: absolute;
  top: 38%;
  z-index: 3;
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: var(--gx-text);
  background: rgba(12, 12, 18, 0.72);
  border: 1px solid var(--gx-border-strong);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--gx-shadow-soft);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--gx-transition), background var(--gx-transition);
}

.gx-shelf-btn svg { width: 1rem; height: 1rem; }

.gx-shelf-btn[data-dir="prev"] { left: 0.25rem; }
.gx-shelf-btn[data-dir="next"] { right: 0.25rem; }

.gx-shelf-btn:hover { background: rgba(255, 255, 255, 0.14); }

.gx-shelf-btn:disabled { opacity: 0.25; cursor: default; }

.gx-shelf-viewport:hover .gx-shelf-btn,
.gx-shelf-viewport:focus-within .gx-shelf-btn {
  opacity: 1;
}

.gx-shelf-viewport:hover .gx-shelf-btn:disabled,
.gx-shelf-viewport:focus-within .gx-shelf-btn:disabled {
  opacity: 0.25;
}

.gx-shelf-viewport[data-overflow="false"] .gx-shelf-btn { display: none; }

@media (hover: none) {
  .gx-shelf-viewport .gx-shelf-btn { display: none; }
}

/* ---------------- cards ---------------- */

.gx-card {
  background: transparent;
  border: 0;
  border-radius: 0.8rem;
  cursor: pointer;
  min-width: 0;
  transition: transform 160ms ease;
}

.gx-card:hover { transform: translateY(-3px); }

.gx-card:focus-visible {
  outline: 2px solid var(--gx-accent);
  outline-offset: 3px;
}

.gx-card-media {
  position: relative;
  aspect-ratio: 2/3;
  overflow: hidden;
  border-radius: 0.8rem;
  background: var(--gx-surface);
  border: 1px solid var(--gx-border-faint);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  transition: box-shadow 160ms ease, border-color 160ms ease;
}

.gx-card:hover .gx-card-media {
  border-color: var(--gx-border);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.55);
}

.gx-card-media img {
  width: 100%;
  height: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  display: block;
  transition: transform 220ms ease;
}

.gx-card:hover .gx-card-media img { transform: scale(1.045); }

.gx-card-shade {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.42), transparent 32%);
}

.gx-card-rating {
  position: absolute;
  left: 0.5rem;
  bottom: 0.5rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--gx-text);
  background: rgba(8, 8, 13, 0.68);
  border: 1px solid var(--gx-border-faint);
  border-radius: 999px;
  padding: 0.12rem 0.5rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.gx-card-rating .gx-star { color: var(--gx-accent-strong); }

.gx-card-badge {
  position: absolute;
  left: 0.5rem;
  top: 0.5rem;
  max-width: calc(100% - 3.25rem);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gx-accent-strong);
  background: rgba(10, 10, 14, 0.66);
  border: 1px solid var(--gx-accent-border);
  border-radius: 999px;
  padding: 0.14rem 0.55rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.gx-card-list {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  line-height: 1;
  color: var(--gx-text-dim);
  background: rgba(8, 8, 13, 0.62);
  border: 1px solid var(--gx-border-faint);
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: color var(--gx-transition), border-color var(--gx-transition), background var(--gx-transition);
}

.gx-card-list:hover {
  color: var(--gx-text);
  border-color: var(--gx-border-strong);
}

.gx-card-list.is-in-list {
  color: var(--gx-accent-strong);
  border-color: var(--gx-accent-border);
}

.gx-card-body { padding: 0.55rem 0.15rem 0; min-width: 0; }

.gx-card-title {
  font-size: 0.83rem;
  color: var(--gx-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gx-card-sub {
  margin-top: 0.15rem;
  font-size: 0.72rem;
  color: var(--gx-text-faint);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------------- tabs (replaces old red tab styling) ---------------- */

#tabs { gap: 0.4rem; flex-wrap: wrap; justify-content: flex-end; }

.gx-tab {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--gx-text-dim);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.4rem 0.9rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--gx-transition), color var(--gx-transition), border-color var(--gx-transition);
}

.gx-tab:hover { color: var(--gx-text); background: rgba(255, 255, 255, 0.1); }

.gx-tab.active {
  color: var(--gx-text);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.11);
  border-color: var(--gx-border);
}

/* ---------------- skeletons (dark/glass, no red) ---------------- */

.gx-sk { min-width: 0; }

.gx-shelf-track > .gx-sk { flex: 0 0 auto; width: clamp(132px, 24vw, 184px); }

.gx-sk-media {
  aspect-ratio: 2/3;
  border-radius: 0.8rem;
  background: var(--gx-surface);
  border: 1px solid var(--gx-border-faint);
}

.gx-sk-bar {
  height: 0.65rem;
  border-radius: 999px;
  background: var(--gx-surface-2);
  margin: 0.6rem 0.15rem 0;
}

.gx-sk-bar.short { width: 45%; }

.gx-sk-media,
.gx-sk-bar {
  position: relative;
  overflow: hidden;
}

.gx-sk-media::after,
.gx-sk-bar::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.07), transparent);
  animation: gx-sk-shimmer 1.6s infinite;
}

@keyframes gx-sk-shimmer { 100% { transform: translateX(100%); } }

/* ---------------- empty states ---------------- */

.gx-empty {
  color: var(--gx-text-dim);
  font-size: 0.9rem;
  padding: 2.5rem 1rem;
  text-align: center;
}

/* ---------------- mobile ---------------- */

@media (max-width: 640px) {
  .gx-shelf { margin-top: 2.25rem; }
  .gx-shelf-track { gap: 0.7rem; }
  .gx-shelf-title,
  #section-title { font-size: 1.1rem; }
  .gx-viewall { font-size: 0.78rem; }
}

/* ---------------- reduced motion ---------------- */

@media (prefers-reduced-motion: reduce) {
  .gx-card,
  .gx-card-media,
  .gx-card-media img,
  .gx-viewall,
  .gx-viewall .gx-viewall-arrow,
  .gx-tab,
  .gx-card-list,
  .gx-shelf-btn,
  .gx-shelf-viewport::before,
  .gx-shelf-viewport::after {
    transition: none;
  }

  .gx-card:hover { transform: none; }
  .gx-card:hover .gx-card-media img { transform: none; }
  .gx-shelf-track { scroll-behavior: auto; }

  .gx-sk-media::after,
  .gx-sk-bar::after { animation: none; }
}