/**
 * Atlas Vertical – Card components
 * Portrait-first cards for a vertical video publishing platform.
 */

.card {
  break-inside: avoid;
}

.card__link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card__link:hover {
  text-decoration: none;
}

/* ---------------------------------------------------------------
   Media container – portrait-first by default
   --------------------------------------------------------------- */

.card__media {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background-color: var(--color-bg-alt);
}

.card__media img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card__media--portrait {
  aspect-ratio: 9 / 16;
}

.card__link:hover .card__media img {
  transform: translateY(-3px) scale(1.02);
}

/* No-image placeholder — neutral gradient + subtle pattern for missing thumbnails */
.card__media-placeholder {
  width: 100%;
  height: 100%;
  aspect-ratio: 9 / 16;
  background: linear-gradient(165deg, var(--color-bg-alt) 0%, var(--color-border) 50%, var(--color-bg-alt) 100%);
  background-size: 100% 100%;
  position: relative;
}

.card__media-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
  background-size: 16px 16px;
  pointer-events: none;
}

[data-theme="dark"] .card__media-placeholder::before,
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .card__media-placeholder::before {
    background-image: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  }
}


/* Play icon overlay — sharpens on hover */
.card__media .play-icon {
  position: absolute;
  bottom: var(--space-sm);
  left: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  backdrop-filter: blur(4px);
  transition: background 0.25s, transform 0.25s;
}

.card__media .play-icon svg {
  width: 18px;
  height: 18px;
  transition: transform 0.25s;
}

.card__link:hover .card__media .play-icon {
  background: rgba(0, 0, 0, 0.7);
  transform: scale(1.05);
}

/* ---------------------------------------------------------------
   Trio card (Portrait Trio hero): duration badge, author
   --------------------------------------------------------------- */

.trio-card__duration {
  display: none;
  position: absolute;
  bottom: var(--space-sm);
  right: var(--space-sm);
  padding: 3px 8px;
  font-size: var(--font-size-xs);
  font-variant-numeric: tabular-nums;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  border-radius: 4px;
  line-height: 1;
}

.trio-card__duration.is-visible {
  display: block;
}

.trio-card__author,
.trio-card__meta {
  margin: var(--space-xs) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.trio-card__author:empty,
.trio-card__meta:empty {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  .card__media .play-icon,
  .card__media img,
  .story-panel__media .play-icon,
  .story-panel__media img {
    transition: none;
  }

  .card__link:hover .card__media img,
  .story-panel__link:hover .story-panel__media img {
    transform: none;
  }

  .card__link:hover .card__media .play-icon,
  .story-panel__link:hover .story-panel__media .play-icon {
    transform: none;
  }
}

/* Center play icon on placeholder cards (no feature image) */
.card__media .card__media-placeholder + .play-icon {
  bottom: 50%;
  left: 50%;
  transform: translate(-50%, 50%);
  width: 56px;
  height: 56px;
  background: rgba(0, 0, 0, 0.6);
}

.card__media .card__media-placeholder + .play-icon svg {
  width: 24px;
  height: 24px;
}

/* ---------------------------------------------------------------
   Content block
   --------------------------------------------------------------- */

.card__content {
  padding: var(--space-md) 0 0;
}

.card__title {
  margin: 0 0 var(--space-xs);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: var(--line-height-tight);
  letter-spacing: -0.01em;
  transition: color 0.25s ease;
  overflow-wrap: break-word;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card__link:hover .card__title {
  color: var(--color-accent);
}

.card__meta {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.card__access-badge {
  position: absolute;
  top: var(--space-sm);
  left: var(--space-sm);
  padding: 3px 8px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  border-radius: 4px;
  z-index: 1;
  pointer-events: none;
}

.card__excerpt {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  overflow-wrap: break-word;
  word-break: break-word;
}

/* ---------------------------------------------------------------
   Compact card variant (author rail)
   --------------------------------------------------------------- */

.card--compact .card__content {
  padding: 0 0 var(--space-xs);
}

.card--compact .card__title {
  font-size: var(--font-size-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------------------------------------------------------------
   Hero card: editorial text + phone-frame visual
   Text comes first for above-the-fold visibility.
   --------------------------------------------------------------- */

.hero-card__content {
  padding: 0 var(--space-md) var(--space-xl);
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
}

.hero-card__label {
  display: inline-block;
  margin-bottom: var(--space-md);
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.hero-card__title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  overflow-wrap: break-word;
  word-break: break-word;
}

.hero-card__title a {
  color: inherit;
  text-decoration: none;
}

.hero-card__title a:hover {
  color: var(--color-accent);
}

.hero-card__excerpt {
  margin: 0 auto var(--space-md);
  max-width: 460px;
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
  overflow-wrap: break-word;
  word-break: break-word;
}

.hero-card__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Phone-frame visual */
.hero-frame {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  background: var(--color-bg-alt);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.hero-frame__media {
  position: relative;
  aspect-ratio: 9 / 16;
  overflow: hidden;
}

.hero-frame__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.page-archive__stage:hover .hero-frame__media img {
  transform: scale(1.02);
}

.hero-frame__media .play-icon {
  position: absolute;
  bottom: var(--space-md);
  left: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  backdrop-filter: blur(4px);
}

.hero-frame__media .play-icon svg {
  width: 24px;
  height: 24px;
}

/* ---------------------------------------------------------------
   Story panel: scroll-snap panels with text above frame
   --------------------------------------------------------------- */

.story-panel {
  scroll-snap-align: start;
  scroll-snap-stop: normal;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
}

.story-panel__index {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  font-size: var(--font-size-xs);
  font-variant-numeric: tabular-nums;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.story-panel:hover .story-panel__index {
  opacity: 1;
}

.story-panel__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: inherit;
  max-width: 380px;
  width: 100%;
}

.story-panel__link:hover {
  text-decoration: none;
}

.story-panel__content {
  padding: 0 0 var(--space-xl);
  text-align: center;
  max-width: 380px;
}

.story-panel__title {
  margin: 0 0 var(--space-xs);
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: var(--line-height-tight);
  transition: color 0.2s;
  overflow-wrap: break-word;
  word-break: break-word;
}

.story-panel__link:hover .story-panel__title {
  color: var(--color-accent);
}

.story-panel__excerpt {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.story-panel__author {
  margin: var(--space-sm) 0 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.story-panel__author:empty {
  display: none;
}

.story-panel__cta {
  display: inline-block;
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  transition: color 0.2s;
}

.story-panel__link:hover .story-panel__cta {
  color: var(--color-accent);
  text-decoration: underline;
}

.story-panel__frame {
  position: relative;
  width: 100%;
  border-radius: 20px;
  overflow: hidden;
  background: var(--color-bg-alt);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .story-panel__frame {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .story-panel__frame {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  }
}

.story-panel__media {
  position: relative;
  aspect-ratio: 9 / 16;
  overflow: hidden;
}

.story-panel__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.story-panel__link:hover .story-panel__media img {
  transform: translateY(-3px) scale(1.02);
}

.story-panel__media .play-icon {
  position: absolute;
  bottom: var(--space-md);
  left: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  backdrop-filter: blur(4px);
  transition: background 0.25s, transform 0.25s;
}

.story-panel__media .play-icon svg {
  width: 22px;
  height: 22px;
}

.story-panel__link:hover .story-panel__media .play-icon {
  background: rgba(0, 0, 0, 0.7);
  transform: scale(1.05);
}

.story-panel__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Desktop: story panels become side-by-side — thumbnail left, text right.
   Alternating panels reverse for visual variety. */
@media (min-width: 768px) {
  .story-panel {
    min-height: auto;
    padding: var(--space-xl) var(--space-lg);
  }

  .story-panel__link {
    flex-direction: row;
    align-items: center;
    gap: var(--space-xl);
    max-width: 800px;
  }

  .story-panel__frame {
    flex-shrink: 0;
    width: 240px;
    order: -1;
  }

  .story-panel__content {
    flex: 1;
    min-width: 0;
    text-align: left;
    padding: 0;
    max-width: none;
  }

  .story-panel__title {
    font-size: var(--font-size-lg);
  }

  .story-panel__excerpt {
    -webkit-line-clamp: 3;
  }

  /* Alternate panels: thumbnail on right, content on left */
  .story-panel:nth-child(even) .story-panel__link {
    flex-direction: row-reverse;
  }

  .story-panel:nth-child(even) .story-panel__content {
    text-align: right;
  }
}

@media (min-width: 1024px) {
  .story-panel__frame {
    width: 280px;
  }

  .story-panel__link {
    max-width: 900px;
  }
}

/* ---------------------------------------------------------------
   Scroll affordance indicator
   --------------------------------------------------------------- */

.hero-scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
  animation: scrollPulse 2.2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  transition: opacity 0.4s ease;
}

.hero-scroll-indicator.is-hidden {
  opacity: 0;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .hero-scroll-indicator {
    animation: none;
  }
}

.hero-scroll-indicator__arrow {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  line-height: 1;
}

.hero-scroll-indicator__text {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: translateY(0); }
  50% { opacity: 0.5; transform: translateY(3px); }
}

/* ---------------------------------------------------------------
   Focus styles
   --------------------------------------------------------------- */

.card__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------------------------------------------------------------
   Dark mode hero frame
   --------------------------------------------------------------- */

[data-theme="dark"] .hero-frame {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .hero-frame {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  }
}

/* ---------------------------------------------------------------
   Mobile performance: reduce compositing cost
   backdrop-filter triggers GPU compositing on every overlapping
   element; opaque backgrounds are far cheaper during scroll.
   --------------------------------------------------------------- */

@media (max-width: 767px) {
  .card__media .play-icon,
  .hero-frame__media .play-icon,
  .story-panel__media .play-icon {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: rgba(0, 0, 0, 0.7);
  }

  .hero-frame,
  .story-panel__frame {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  }

  [data-theme="dark"] .hero-frame,
  [data-theme="dark"] .story-panel__frame {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  }
}