/* ============================================================================
 * Deutsch für Industry 5.0 — index.css
 * ----------------------------------------------------------------------------
 * Project : deutsch50.aialchemyhub.in
 * File    : assets/css/index.css
 * Purpose : Page-specific styles for index.php (home page).
 *           Shared/foundation styles live in main.css; only home-page
 *           selectors belong here.
 * Author  : Satya Prakash Nigam
 * License : MIT (code) · Content: CC BY-NC-SA 4.0
 * Requires: main.css (loaded first)
 * Notes   : Every section is self-contained and prefixed with its concern.
 *           If a selector is ever needed by another page, promote it to
 *           main.css — do not duplicate.
 * ========================================================================== */


/* ============================================================================
 * SECTION 01 — HERO CAROUSEL (with background images)
 * ========================================================================== */
.hero-carousel {
  border-radius: var(--d50-radius-lg);
  overflow: hidden;
  box-shadow: var(--d50-shadow-lg);
  background: var(--d50-surface-3);
  border: 1px solid var(--d50-line);
}

.hero-carousel .carousel-inner { min-height: 420px; }

/* --- Slide base --------------------------------------------------------- */
.hero-slide {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  isolation: isolate;
}

/* --- Background images (picsum placeholders, deterministic IDs) ---------- */
.hero-slide-bg-1 { background-image: url("https://picsum.photos/id/180/1200/800"); }
.hero-slide-bg-2 { background-image: url("https://picsum.photos/id/1/1200/800");   }
.hero-slide-bg-3 { background-image: url("https://picsum.photos/id/20/1200/800");  }
.hero-slide-bg-4 { background-image: url("https://picsum.photos/id/119/1200/800"); }

/* --- Overlay: dark gradient so text stays readable over any image -------- */
.hero-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, 0.82) 0%,
    rgba(27, 58, 107, 0.70) 50%,
    rgba(15, 118, 110, 0.55) 100%
  );
  z-index: 1;
}

/* --- Glass content card -------------------------------------------------- */
.hero-slide-content {
  position: relative;
  z-index: 2;
  margin: 1.75rem;
  padding: 1.75rem 1.75rem 1.5rem;
  border-radius: var(--d50-radius-lg);
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.20);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  color: #ffffff;
  max-width: 92%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.hero-slide-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--d50-radius);
  background: rgba(255, 255, 255, 0.15);
  color: var(--d50-gold);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.hero-slide-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.hero-slide-list li {
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.95rem;
}
.hero-slide-list li:last-child { border-bottom: 0; }
.hero-slide-list i { color: var(--d50-gold); }

/* --- Indicators ---------------------------------------------------------- */
.hero-carousel .carousel-indicators {
  bottom: 12px;
  margin-bottom: 0;
  z-index: 3;
}
.hero-carousel .carousel-indicators [data-bs-target] {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #ffffff;
  opacity: 0.5;
  border: 0;
  transition: all var(--d50-transition);
}
.hero-carousel .carousel-indicators .active {
  background-color: var(--d50-gold);
  opacity: 1;
  width: 28px;
  border-radius: 6px;
}

/* --- Controls ------------------------------------------------------------ */
.hero-carousel .carousel-control-prev,
.hero-carousel .carousel-control-next {
  width: 48px;
  opacity: 0;
  transition: opacity var(--d50-transition);
  z-index: 3;
}
.hero-carousel:hover .carousel-control-prev,
.hero-carousel:hover .carousel-control-next,
.hero-carousel:focus-within .carousel-control-prev,
.hero-carousel:focus-within .carousel-control-next {
  opacity: 1;
}
.hero-carousel .carousel-control-prev-icon,
.hero-carousel .carousel-control-next-icon {
  background-color: rgba(255, 255, 255, 0.20);
  border: 1px solid rgba(255, 255, 255, 0.40);
  border-radius: 50%;
  padding: 12px;
  width: 40px;
  height: 40px;
  background-size: 50%;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* --- Responsive ---------------------------------------------------------- */
@media (max-width: 991.98px) {
  .hero-carousel .carousel-inner,
  .hero-slide { min-height: 380px; }
  .hero-slide-content { margin: 1.25rem; padding: 1.25rem; }
  .hero-slide-title { font-size: 1.1rem; }
}
@media (max-width: 575.98px) {
  .hero-carousel .carousel-inner,
  .hero-slide { min-height: 360px; }
  .hero-slide-content { max-width: 100%; }
  .hero-slide-list li { font-size: 0.875rem; }
}

/* --- Reduced motion: disable animate.css + image transition -------------- */
@media (prefers-reduced-motion: reduce) {
  .hero-slide-content { animation: none !important; }
}
/* ============================================================================
 * END OF SECTION 01
 * ========================================================================== */

/* ============================================================================
 * SECTION 02 — 90-DAY LESSON GRID (BS5 badges, three blocks)
 * ========================================================================== */

/* --- Block row head ----------------------------------------------------- */
.lesson-block-row {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--d50-line);
}
.lesson-block-row:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.lesson-block-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.lesson-block-label {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--d50-muted);
  margin-right: 0.5rem;
}

.lesson-block-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--d50-ink);
}

.lesson-block-range {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--d50-indigo);
  background: var(--d50-indigo-100);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  white-space: nowrap;
}

/* --- Badge tiles -------------------------------------------------------- */
/* Specificity note: BS5 .badge sets color: #fff with its own specificity.
   We use .lesson-badge-tile with !important on color/background-color to
   guarantee override, no matter load order. */
a.lesson-badge-tile,
span.lesson-badge-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 0.5rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: var(--d50-radius);
  text-decoration: none;
  line-height: 1;
  transition: transform var(--d50-transition),
              box-shadow var(--d50-transition),
              background-color var(--d50-transition),
              border-color var(--d50-transition);
}

/* Published — solid colour, tinted by block (each block has a distinct pair:
   dark text on light background for saffron; light text on dark for teal
   and indigo — chosen for guaranteed contrast) */
a.lesson-badge-tile.badge-block-foundation {
  background-color: var(--d50-saffron) !important;
  color: #0B1220 !important;
  border: 1px solid var(--d50-saffron-600);
}
a.lesson-badge-tile.badge-block-foundation:hover,
a.lesson-badge-tile.badge-block-foundation:focus {
  background-color: var(--d50-saffron-600) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: var(--d50-shadow);
}

a.lesson-badge-tile.badge-block-expansion {
  background-color: var(--d50-teal) !important;
  color: #ffffff !important;
  border: 1px solid #0B5D57;
}
a.lesson-badge-tile.badge-block-expansion:hover,
a.lesson-badge-tile.badge-block-expansion:focus {
  background-color: #0B5D57 !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: var(--d50-shadow);
}

a.lesson-badge-tile.badge-block-application {
  background-color: var(--d50-indigo) !important;
  color: #ffffff !important;
  border: 1px solid var(--d50-indigo-600);
}
a.lesson-badge-tile.badge-block-application:hover,
a.lesson-badge-tile.badge-block-application:focus {
  background-color: var(--d50-indigo-600) !important;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: var(--d50-shadow);
}

/* "New" — most recently published lesson gets a gold ring + star */
a.lesson-badge-tile.lesson-badge-tile-new {
  box-shadow: 0 0 0 3px var(--d50-gold);
  font-weight: 800;
}
a.lesson-badge-tile.lesson-badge-tile-new:hover,
a.lesson-badge-tile.lesson-badge-tile-new:focus {
  box-shadow: 0 0 0 3px var(--d50-gold), var(--d50-shadow);
}

.lesson-badge-star {
  font-size: 0.6rem;
  color: #0B1220;
  margin-left: 0.25rem;
}

/* Locked — greyed, dashed, not clickable */
span.lesson-badge-tile.lesson-badge-tile-locked {
  background-color: var(--d50-surface-2) !important;
  color: var(--d50-muted) !important;
  border: 1px dashed var(--d50-line);
  cursor: not-allowed;
  opacity: 0.6;
  font-weight: 500;
}

/* --- Footer note -------------------------------------------------------- */
.lesson-grid-note {
  font-size: 0.82rem;
  color: var(--d50-muted);
  text-align: center;
}
.lesson-grid-note strong { color: var(--d50-ink); }

/* --- Responsive --------------------------------------------------------- */
@media (max-width: 575.98px) {
  a.lesson-badge-tile,
  span.lesson-badge-tile {
    min-width: 40px;
    padding: 0.4rem 0.5rem;
    font-size: 0.78rem;
  }
}
/* ============================================================================
 * END OF SECTION 02
 * ========================================================================== */

/* ============================================================================
 * SECTION 03 — APPENDIX CARDS (reference library)
 * ========================================================================== */

.appendix-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  background: var(--d50-surface);
  border: 1px solid var(--d50-line);
  border-left: 4px solid var(--d50-saffron);
  border-radius: var(--d50-radius-lg);
  text-decoration: none;
  color: var(--d50-ink);
  box-shadow: var(--d50-shadow-sm);
  transition: transform var(--d50-transition),
              box-shadow var(--d50-transition),
              border-color var(--d50-transition);
  height: 100%;
}
.appendix-card:hover,
.appendix-card:focus {
  transform: translateY(-3px);
  box-shadow: var(--d50-shadow);
  border-left-color: var(--d50-teal);
}

/* Letter badge */
.appendix-card-letter {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 900;
  line-height: 1;
  color: var(--d50-indigo);
  background: var(--d50-indigo-100);
  border-radius: var(--d50-radius);
  letter-spacing: -0.02em;
}
.appendix-card:hover .appendix-card-letter {
  background: var(--d50-indigo);
  color: #ffffff;
}
.appendix-card-letter i { font-size: 1.35rem; }

/* Text block */
.appendix-card-body {
  flex: 1 1 auto;
  min-width: 0;
}
.appendix-card-kicker {
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--d50-muted);
  margin-bottom: 0.15rem;
}
.appendix-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--d50-ink);
  line-height: 1.3;
}

/* Arrow indicator */
.appendix-card-arrow {
  flex-shrink: 0;
  font-size: 1.1rem;
  color: var(--d50-muted);
  transition: color var(--d50-transition), transform var(--d50-transition);
}
.appendix-card:hover .appendix-card-arrow {
  color: var(--d50-indigo);
  transform: translateX(3px);
}

/* Empty state */
.appendix-grid-empty {
  padding: 2rem;
  background: var(--d50-surface);
  border: 1px dashed var(--d50-line);
  border-radius: var(--d50-radius-lg);
  text-align: center;
  color: var(--d50-muted);
  font-size: 0.92rem;
}

/* Footer note */
.appendix-grid-note {
  font-size: 0.82rem;
  color: var(--d50-muted);
  text-align: center;
}
.appendix-grid-note strong { color: var(--d50-ink); }

/* Responsive */
@media (max-width: 575.98px) {
  .appendix-card { padding: 0.95rem 1rem; gap: 0.8rem; }
  .appendix-card-letter { width: 42px; height: 42px; font-size: 1.3rem; }
  .appendix-card-title { font-size: 0.92rem; }
}
/* ============================================================================
 * END OF SECTION 03
 * ========================================================================== */




/* ============================================================================
 * <END OF FILE>  assets/css/index.css
 * ========================================================================== */