/* ============================================================
   components.css — Navigation, cards, buttons, interactive
   ============================================================ */

/* ============================================================
   Top Navigation — Apple-style
   ============================================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border-bottom: 0.5px solid var(--nav-border);
  user-select: none;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width-site);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
}

/* ---- Logo ---- */

.nav-logo {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--accent-red);
  opacity: 0.9;
  transition: opacity 0.2s ease;
  flex-shrink: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  height: 100%;
  text-decoration: none;
}

.nav-logo:hover { opacity: 1; }

/* ---- Menu list ---- */

.nav-menu {
  display: flex;
  align-items: center;
  height: 100%;
  flex: 1;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 2px;
}

.nav-item {
  height: 100%;
  display: flex;
  align-items: center;
}

/* ---- Nav label (top-level link) ---- */

.nav-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 100%;
  padding: 0 10px;
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--nav-link-color);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.22s ease;
  white-space: nowrap;
  outline: none;
  position: relative;
}

.nav-label::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1px;
  background: var(--nav-link-hover);
  transition: width 0.25s var(--nav-animation-curve);
}

.nav-label:hover,
.nav-label.active {
  color: var(--nav-link-hover);
}

.nav-label:hover::after,
.nav-label.active::after {
  width: calc(100% - 20px);
}

.nav-label:focus-visible {
  box-shadow: 0 0 0 2px var(--accent-blue);
  border-radius: 4px;
}

/* ---- Chevron ---- */

.nav-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 10px;
  height: 10px;
  transition: transform 0.28s var(--nav-animation-curve);
  color: var(--nav-chevron-color);
}

.nav-item.open .nav-chevron {
  transform: rotate(180deg);
}

.nav-chevron svg {
  display: block;
  width: 10px;
  height: 6px;
}

/* ---- Dropdown panel (single shared) ---- */

.nav-panel {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--nav-panel-bg);
  box-shadow: var(--nav-panel-shadow);
  border-bottom: 0.5px solid var(--nav-panel-border);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition:
    opacity 0.18s var(--nav-animation-curve),
    transform 0.22s var(--nav-animation-curve);
  z-index: 999;
}

.nav-panel.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.nav-panel-inner {
  max-width: var(--max-width-site);
  margin: 0 auto;
  padding: 32px 28px 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.nav-panel-inner--issues {
  grid-template-columns: repeat(2, 1fr);
}

/* ---- Panel year groups (Issues dropdown) ---- */

.nav-panel-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-panel-heading {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--nav-column-title);
  padding: 2px 0 8px;
}

/* ---- Panel articles (in columns) ---- */

.nav-panel-article {
  display: block;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--nav-link-color);
  padding: 4px 0;
  text-decoration: none;
  transition: color 0.18s ease;
  opacity: 0;
  transform: translateY(4px);
  transition:
    opacity 0.28s var(--nav-animation-curve),
    transform 0.28s var(--nav-animation-curve),
    color 0.18s ease;
}

.nav-panel.open .nav-panel-article {
  opacity: 1;
  transform: translateY(0);
}

.nav-panel-article:hover {
  color: var(--nav-link-hover);
}

.nav-panel-article:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--accent-blue);
  border-radius: 4px;
}

.nav-panel-view-all {
  grid-column: 1 / -1;
  font-weight: 500;
  color: var(--nav-link-hover);
  margin-top: 4px;
  padding-top: 12px;
  border-top: 0.5px solid var(--nav-panel-border);
}

.nav-panel-date {
  font-size: 11px;
  color: var(--nav-column-title);
  margin-right: 8px;
  flex-shrink: 0;
}

/* Stagger delay for articles */
.nav-panel.open .nav-panel-article:nth-child(1)  { transition-delay: 20ms; }
.nav-panel.open .nav-panel-article:nth-child(2)  { transition-delay: 35ms; }
.nav-panel.open .nav-panel-article:nth-child(3)  { transition-delay: 50ms; }
.nav-panel.open .nav-panel-article:nth-child(4)  { transition-delay: 65ms; }
.nav-panel.open .nav-panel-article:nth-child(5)  { transition-delay: 80ms; }
.nav-panel.open .nav-panel-article:nth-child(6)  { transition-delay: 95ms; }
.nav-panel.open .nav-panel-article:nth-child(7)  { transition-delay: 110ms; }
.nav-panel.open .nav-panel-article:nth-child(8)  { transition-delay: 125ms; }
.nav-panel.open .nav-panel-article:nth-child(9)  { transition-delay: 140ms; }
.nav-panel.open .nav-panel-article:nth-child(10) { transition-delay: 155ms; }
.nav-panel.open .nav-panel-article:nth-child(11) { transition-delay: 170ms; }
.nav-panel.open .nav-panel-article:nth-child(12) { transition-delay: 185ms; }

/* ---- Page overlay (frosted glass below panel) ---- */

.nav-overlay {
  position: fixed;
  inset: 0;
  background: var(--nav-overlay-bg);
  backdrop-filter: var(--nav-overlay-blur);
  -webkit-backdrop-filter: var(--nav-overlay-blur);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s var(--nav-animation-curve);
  z-index: 998;
}

.nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* ---- Search ---- */

.nav-actions {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  z-index: 10;
}

.nav-search-wrap {
  position: relative;
}

.nav-search {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  color: var(--nav-search-color);
  background: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
  outline: none;
  position: relative;
  z-index: 10;
}

.nav-search:hover {
  background: var(--nav-search-bg);
  color: var(--nav-link-hover);
}

.nav-search:focus-visible {
  outline: none;
}

.nav-search svg {
  display: block;
  width: 16px;
  height: 16px;
}

/* Search panel (expands from right) */
.nav-search-panel {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  width: 0;
  height: 36px;
  background: var(--nav-panel-bg);
  border-radius: 10px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transition:
    width 0.32s var(--nav-animation-curve),
    opacity 0.22s ease;
  z-index: 5;
  border: 0.5px solid var(--nav-panel-border);
}

.nav-search-panel.open {
  width: 260px;
  opacity: 1;
  pointer-events: auto;
}

.nav-search-inner {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 12px;
  gap: 8px;
}

.nav-search-icon {
  width: 14px;
  height: 14px;
  color: var(--nav-column-title);
  flex-shrink: 0;
}

.nav-search-input {
  flex: 1;
  height: 100%;
  background: none;
  border: none;
  outline: none;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 400;
  color: var(--nav-link-hover);
  letter-spacing: -0.01em;
}

.nav-search-input::placeholder {
  color: var(--nav-column-title);
}

/* ---- Responsive ---- */

@media (max-width: 1024px) {
  .nav-list { gap: 0; }
  .nav-label { font-size: 11px; padding: 0 7px; }
  .nav-panel-inner { gap: 20px; padding: 28px 20px 32px; }
  .nav-search-panel.open { width: 220px; }
}

@media (max-width: 768px) {
  .nav-container { padding: 0 14px; }
  .nav-menu {
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    mask-image: linear-gradient(to right, transparent 0%, black 8px, black calc(100% - 8px), transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 8px, black calc(100% - 8px), transparent 100%);
  }
  .nav-menu::-webkit-scrollbar { display: none; }
  .nav-label { padding: 0 8px; font-size: 11px; }
  .nav-logo { font-size: 13px; }
  .nav-panel-inner {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 24px 16px 36px;
  }
  .nav-search-panel {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    transform: none;
    height: 48px;
    border-radius: 0;
    border-top: none;
  }
  .nav-search-panel.open { width: 100%; }
}

@media (max-width: 480px) {
  .nav-panel-inner {
    grid-template-columns: 1fr;
    padding: 20px 14px 32px;
  }
}

/* ============================================================
   Hero Duo — two side-by-side featured cards
   Apple-style: elegant, centered, independent carousels
   ============================================================ */

.hero-duo {
  display: flex;
  gap: 20px;
  margin-bottom: 44px;
  max-width: var(--max-width-site);
  margin-left: auto;
  margin-right: auto;
}

.hero-card {
  position: relative;
  flex: 1;
  min-width: 0;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.32, 0.08, 0.24, 1),
              box-shadow 0.4s cubic-bezier(0.32, 0.08, 0.24, 1);
}

.hero-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.hero-card-slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-card-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity 0.7s cubic-bezier(0.32, 0.08, 0.24, 1),
              transform 0.7s cubic-bezier(0.32, 0.08, 0.24, 1);
  pointer-events: none;
}

.hero-card-slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

.hero-card-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.32, 0.08, 0.24, 1);
}

.hero-card:hover .hero-card-slide.active img {
  transform: scale(1.03);
}

.hero-card-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.92) 0%,
    rgba(0, 0, 0, 0.4) 40%,
    rgba(0, 0, 0, 0.05) 65%,
    transparent 78%
  );
}

.hero-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 32px 28px;
}

.hero-card-tag {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 8px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.hero-card-title {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 500;
  line-height: 1.12;
  color: #fff;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.hero-card-subtitle {
  font-family: var(--font-ui);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Hero card progress bar */
.hero-card-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  z-index: 10;
  background: rgba(255, 255, 255, 0.1);
}

.hero-card-progress-fill {
  height: 100%;
  width: 0%;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 0 1px 1px 0;
}

/* Hero card arrow buttons */
.hero-card-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s ease, background 0.25s ease;
  cursor: pointer;
  border: 0.5px solid rgba(255, 255, 255, 0.12);
  padding: 0;
}

.hero-card-arrow svg {
  display: block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.hero-card:hover .hero-card-arrow {
  opacity: 1;
}

.hero-card-arrow:hover {
  background: rgba(0, 0, 0, 0.55);
}

.hero-card-arrow-left {
  left: 10px;
}

.hero-card-arrow-right {
  right: 10px;
}

/* Hero card dot indicators */
.hero-card-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 10;
}

.hero-card-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.3);
  transition: all 0.3s ease;
  cursor: pointer;
}

.hero-card-dot.active {
  background: #fff;
  width: 18px;
  border-radius: 3px;
}

/* ============================================================
   Category Pills
   ============================================================ */

.category-bar {
  margin: 28px 0 36px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.category-bar::-webkit-scrollbar {
  display: none;
}

.category-list {
  display: flex;
  gap: 8px;
  padding-bottom: 4px;
}

.category-pill {
  flex-shrink: 0;
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  cursor: pointer;
  user-select: none;
}

.category-pill:hover {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.category-pill.active {
  color: #000;
  background: #fff;
  border-color: #fff;
  font-weight: 600;
}

/* ============================================================
   News Card
   ============================================================ */

.news-card {
  position: relative;
  display: block;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  cursor: pointer;
}

.news-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-card-hover);
}

.news-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease-out;
}

.news-card:hover img {
  transform: scale(1.06);
}

.news-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.88) 0%,
    rgba(0, 0, 0, 0.35) 45%,
    transparent 70%
  );
}

.news-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 14px;
}

.news-card-tag {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 4px;
}

.news-card-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.25;
  color: #fff;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-date {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 4px;
}

/* ============================================================
   Magazine Cover Card (issues page)
   ============================================================ */

.magazine-card {
  position: relative;
  display: block;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.magazine-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-card-hover);
}

.magazine-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease-out;
}

.magazine-card:hover img {
  transform: scale(1.04);
}

.magazine-card-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.92), transparent);
}

.magazine-card-date {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.7);
}

.magazine-card-count {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 2px;
}

/* ============================================================
   Economist Brand Box
   ============================================================ */

.economist-box {
  --scale: 0.42;
  background-color: var(--accent-red);
  color: white;
  padding: calc(25px * var(--scale)) calc(35px * var(--scale));
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  min-width: calc(280px * var(--scale));
  line-height: 0.9;
}

.economist-box .the {
  font-size: calc(45px * var(--scale));
  font-weight: 500;
  letter-spacing: calc(1px * var(--scale));
}

.economist-box .name {
  font-size: calc(45px * var(--scale));
  font-weight: 500;
  letter-spacing: calc(2px * var(--scale));
}

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: #fff;
  color: #000;
}

.btn-primary:hover {
  background: rgba(255, 255, 255, 0.88);
  transform: scale(1.04);
}

/* ============================================================
   Divider
   ============================================================ */

.divider {
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  margin: 20px 0;
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 768px) {
  .category-bar {
    margin: 20px 0 28px;
  }

  .category-pill {
    padding: 6px 13px;
    font-size: 11px;
  }

  .news-card-content {
    padding: 12px 10px;
  }

  .news-card-title {
    font-size: 12px;
  }

  .economist-box {
    --scale: 0.32;
  }

  .hero-duo {
    flex-direction: column;
    gap: 14px;
  }

  .hero-card {
    aspect-ratio: 16 / 10;
    max-height: 320px;
  }

  .hero-card-content {
    padding: 24px 18px;
  }

  .hero-card-title {
    font-size: 18px;
  }

  .hero-card-subtitle {
    font-size: 12px;
  }

  .hero-card-arrow {
    width: 30px;
    height: 30px;
  }
}