/* HowFeedWorks.css */

.hfw-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: #f8fafc;
  position: relative;
  overflow-x: hidden;
  font-family: 'Inter', sans-serif;
}

/* Premium Layered Background */
.hfw-bg-wrapper {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  overflow: hidden;
  z-index: 0;
  background-color: #f8fafc; /* Layer 4: White/light base */
}

.hfw-wave-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

/* Main Content Area */
.hfw-main {
  position: relative;
  z-index: 2;
  flex: 1;
  padding: 120px 24px 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hfw-header {
  text-align: right;
  width: 100%;
  max-width: 1280px;
  margin-bottom: 50px;
  position: relative;
  z-index: 10;
  padding-right: 4vw;
}

.hfw-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  color: #ffffff;
  margin: 0;
  line-height: 1.1;
  letter-spacing: -1px;
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.hfw-title-underline {
  height: 4px;
  width: 80px;
  background: linear-gradient(90deg, #0ea5e9, #10b981);
  border-radius: 2px;
  margin-top: 12px;
  margin-left: auto;
  display: block;
}

/* Category Navigation */
.hfw-category-nav-wrapper {
  width: 100%;
  max-width: 1100px;
  margin-bottom: 50px;
  background: #ffffff;
  border-radius: 99px;
  padding: 12px;
  box-shadow: 0 10px 30px rgba(15, 76, 129, 0.08);
  border: 1px solid rgba(226, 232, 240, 0.8);
  overflow-x: auto;
  scrollbar-width: none;
}

.hfw-category-nav-wrapper::-webkit-scrollbar {
  display: none;
}

.hfw-category-list {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: max-content;
  justify-content: space-between;
}

.hfw-category-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 99px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 700;
  font-size: 13px;
  color: #475569;
  border: none;
  background: transparent;
  position: relative;
}

.hfw-category-item:hover {
  background: #f1f5f9;
  color: #0f4c81;
}

.hfw-category-item.active {
  background: linear-gradient(135deg, #2563eb, #10b981);
  color: #ffffff;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}

.hfw-category-item.active::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  border-width: 10px 10px 0 10px;
  border-style: solid;
  border-color: #10b981 transparent transparent transparent;
}

/* Video Cards Layout */
.hfw-cards-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  width: 100%;
  max-width: 1280px;
}

@media (max-width: 1024px) {
  .hfw-cards-container {
    grid-template-columns: 1fr;
  }
}

/* Individual Video Card */
.hfw-card {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(15, 76, 129, 0.1);
  border: 1px solid rgba(226, 232, 240, 0.8);
  display: flex;
  flex-direction: column;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  position: relative;
}

.hfw-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 60px rgba(15, 76, 129, 0.15);
}

/* Card Header Backgrounds (Premium touches) */
.hfw-card-bg-dark {
  background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  color: #ffffff;
  border-color: rgba(255,255,255,0.1);
}

.hfw-card-bg-light {
  background: linear-gradient(180deg, #f0fdf4 0%, #ffffff 100%);
  color: #0f172a;
}

/* Video Wrapper */
.hfw-video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: #000;
}

.hfw-card-bg-light .hfw-video-wrapper {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.hfw-video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Card Content Area */
.hfw-card-content {
  padding: 32px;
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
}

.hfw-card-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.hfw-card-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #ffffff;
  padding: 2px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hfw-card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}

.hfw-brand-label {
  font-size: 11px;
  font-weight: 800;
  color: #10b981;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hfw-card-title {
  font-size: 26px;
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 8px;
}

.hfw-card-subtitle {
  font-size: 15px;
  font-weight: 700;
  color: #10b981;
  margin: 0 0 20px;
}

.hfw-card-desc {
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.9;
  margin: 0 0 24px;
  flex: 1;
}

/* Features Grid */
.hfw-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.hfw-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  opacity: 0.9;
}

.hfw-feature-icon {
  color: #10b981;
}

.hfw-card-bg-dark .hfw-feature-item {
  color: #cbd5e1;
}
.hfw-card-bg-light .hfw-feature-item {
  color: #475569;
}

/* Card Actions */
.hfw-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.hfw-youtube-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(90deg, #22c55e, #10b981);
  color: #ffffff;
  padding: 10px 20px;
  border-radius: 99px;
  font-weight: 800;
  font-size: 13px;
  text-decoration: none;
  box-shadow: 0 8px 16px rgba(16, 185, 129, 0.3);
  transition: all 0.3s ease;
}

.hfw-youtube-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(16, 185, 129, 0.4);
}

.hfw-yt-logo {
  background: #ffffff;
  color: #ff0000;
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.hfw-share-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.1);
  color: #10b981;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.hfw-card-bg-light .hfw-share-btn {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
}

.hfw-share-btn:hover {
  background: #10b981;
  color: #ffffff;
  transform: scale(1.1) rotate(15deg);
}

/* Entrance Animations */
.anim-fade-in-up {
  animation: hfwFadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  opacity: 0;
}

@keyframes hfwFadeInUp {
  0% { opacity: 0; transform: translateY(40px); }
  100% { opacity: 1; transform: translateY(0); }
}

.anim-zoom-in {
  animation: hfwZoomIn 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
  opacity: 0;
}

@keyframes hfwZoomIn {
  0% { opacity: 0; transform: scale(0.95); }
  100% { opacity: 1; transform: scale(1); }
}



/* Pages opened from disk (file://): YouTube won't play embedded videos there, so each video is its
   thumbnail + play button, opening it on YouTube (see assets/js/pages/how-feed-works.js). */
.hfw-video-link {
  position: absolute;
  inset: 0;
  display: block;
  color: #fff;
  text-decoration: none;
}

.hfw-video-link img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hfw-video-link::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0) 35%, rgba(0, 0, 0, 0) 70%, rgba(0, 0, 0, 0.3));
}

.hfw-video-title {
  position: absolute;
  top: 14px;
  left: 16px;
  right: 16px;
  z-index: 1;
  font: 600 15px/1.3 Inter, sans-serif;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.hfw-video-play {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 1;
  width: 68px;
  height: 48px;
  transform: translate(-50%, -50%);
  background: #ff0000;
  border-radius: 14px;
  transition: transform 0.2s ease;
}

.hfw-video-play::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 53%;
  transform: translate(-50%, -50%);
  border-style: solid;
  border-width: 10px 0 10px 17px;
  border-color: transparent transparent transparent #fff;
}

.hfw-video-link:hover .hfw-video-play {
  transform: translate(-50%, -50%) scale(1.08);
}