/* === MOBILE PWA — Touch-first reading experience === */

/* Safe area insets for notched devices */
@supports (padding: max(0px)) {
  body { padding-top: env(safe-area-inset-top); }
}

/* Bottom nav bar */
.mobile-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #fff;
  border-top: 1px solid #E5E0D8;
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: 100;
  padding-bottom: env(safe-area-inset-bottom, 0);
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.92);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  color: var(--light-gray);
  font-size: 0.68rem;
  font-family: var(--font-body);
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 12px;
  transition: color 0.2s, background 0.2s;
  cursor: pointer;
}

.mobile-nav-item svg {
  width: 22px;
  height: 22px;
}

.mobile-nav-item.active {
  color: var(--charcoal);
}

.mobile-nav-item:active {
  background: var(--warm-gray);
}

/* Header bar */
.mobile-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(250, 250, 245, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #E5E0D8;
  padding: 12px 20px;
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mobile-header-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--charcoal);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.mobile-header-actions {
  display: flex;
  gap: 8px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: var(--warm-gray);
  border-radius: 10px;
  cursor: pointer;
  color: var(--charcoal);
  transition: background 0.15s;
}

.icon-btn:active { background: var(--light-gray); }
.icon-btn svg { width: 20px; height: 20px; }

/* Search bar */
.search-bar-wrap {
  padding: 12px 20px;
  background: var(--cream);
}

.search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  border: 2px solid var(--warm-gray);
  border-radius: 14px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: white url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%23999999' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cpath d='m21 21-4.35-4.35'/%3E%3C/svg%3E") 14px center no-repeat;
  color: var(--charcoal);
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.search-input:focus { border-color: var(--amber); }
.search-input::placeholder { color: var(--light-gray); }

/* Tag filter chips */
.tag-filter {
  padding: 8px 20px 12px;
  overflow-x: auto;
  display: flex;
  gap: 8px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.tag-filter::-webkit-scrollbar { display: none; }

.tag-chip {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  border: 2px solid var(--warm-gray);
  background: white;
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--mid-gray);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, color 0.2s;
  white-space: nowrap;
}

.tag-chip.active,
.tag-chip:active {
  border-color: var(--amber);
  background: var(--amber-light);
  color: var(--charcoal);
}

.tag-chip .tag-count {
  background: var(--warm-gray);
  border-radius: 10px;
  padding: 1px 7px;
  font-size: 0.75rem;
}

/* Article list (mobile stack view) */
.mobile-article-list {
  padding: 12px 16px 120px;
}

.mobile-article-item {
  display: flex;
  gap: 14px;
  padding: 14px;
  background: white;
  border-radius: 16px;
  margin-bottom: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s, box-shadow 0.15s;
  position: relative;
  overflow: hidden;
}

.mobile-article-item:active {
  transform: scale(0.99);
}

.mobile-article-item.bookmarked::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--amber);
  border-radius: 4px 0 0 4px;
}

.mobile-thumb {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--warm-gray);
  flex-shrink: 0;
}

.mobile-thumb-placeholder {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  background: var(--warm-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.mobile-thumb-placeholder svg {
  width: 28px;
  height: 28px;
  color: var(--light-gray);
}

.mobile-article-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.mobile-article-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
}

.mobile-article-meta .card-topic {
  font-size: 0.65rem;
}

.mobile-article-meta .card-time {
  font-size: 0.72rem;
}

.mobile-article-title {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--charcoal);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.mobile-article-summary {
  font-size: 0.8rem;
  color: var(--mid-gray);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.mobile-article-summary.generating {
  font-style: italic;
  color: var(--light-gray);
}

.mobile-article-summary-placeholder {
  font-size: 0.8rem;
  color: var(--light-gray);
  font-style: italic;
}

/* Swipe actions (CSS-only reveal) */
.swipe-actions {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  display: flex;
  transform: translateX(100%);
  transition: transform 0.25s ease;
}

.mobile-article-item.swiped .swipe-actions {
  transform: translateX(0);
}

.swipe-btn {
  width: 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
}

.swipe-btn.bookmark {
  background: var(--amber-light);
  color: var(--amber);
}

.swipe-btn.delete {
  background: #fee2e2;
  color: #991b1b;
}

.swipe-btn svg { width: 20px; height: 20px; }

/* Skeleton loaders */
.skeleton {
  background: linear-gradient(90deg, var(--warm-gray) 25%, #e8e3db 50%, var(--warm-gray) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  background: white;
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 12px;
  display: flex;
  gap: 14px;
}

.skeleton-thumb {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  flex-shrink: 0;
}

.skeleton-line {
  height: 14px;
  margin: 6px 0;
  border-radius: 4px;
}

/* Pull-to-refresh indicator */
.pull-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px;
  color: var(--mid-gray);
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.pull-indicator.hidden { display: none; }

.spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Reading mode (article detail) */
.reading-mode {
  padding: calc(env(safe-area-inset-top, 0px) + 20px) 20px 120px;
  max-width: 680px;
  margin: 0 auto;
}

.reading-mode-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--warm-gray);
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--charcoal);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
}

.back-btn:active { background: var(--light-gray); }

.reading-mode-thumb {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 24px;
}

.reading-mode-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 800;
  color: var(--charcoal);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 12px;
}

.reading-mode-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.reading-mode-actions {
  display: flex;
  gap: 10px;
  margin-bottom: 28px;
}

.reading-mode-body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.75;
  color: #374151;
}

.reading-mode-body h2 { margin: 1.5em 0 0.6em; }
.reading-mode-body p { margin: 0 0 1em; }
.reading-mode-body a { color: var(--amber); word-break: break-all; }

.ai-summary-block {
  background: var(--amber-light);
  border-radius: 14px;
  padding: 20px;
  margin: 24px 0;
  border-left: 4px solid var(--amber);
}

.ai-summary-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 8px;
}

.ai-summary-text {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--charcoal);
}

/* Bookmarks view */
.bookmarks-view { padding: 12px 16px 120px; }

/* Recommendations view */
.recs-hero {
  padding: 24px 20px 16px;
}

.recs-hero h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--charcoal);
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}

.recs-hero p {
  font-size: 0.85rem;
  color: var(--mid-gray);
}

/* Settings page */
.settings-view {
  padding: 20px 20px 120px;
}

.settings-section {
  margin-bottom: 28px;
}

.settings-section-title {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light-gray);
  margin-bottom: 10px;
  padding-left: 4px;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: white;
  border-radius: 12px;
  margin-bottom: 8px;
  cursor: pointer;
}

.settings-item:active { background: var(--warm-gray); }

.settings-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.settings-item-left svg {
  width: 20px;
  height: 20px;
  color: var(--mid-gray);
}

.settings-item-label {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--charcoal);
}

.settings-item-value {
  font-size: 0.85rem;
  color: var(--light-gray);
}

/* Toggle switch */
.toggle {
  position: relative;
  width: 48px;
  height: 28px;
}

.toggle input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--warm-gray);
  border-radius: 14px;
  transition: background 0.2s;
  cursor: pointer;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle input:checked + .toggle-slider { background: var(--amber); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* Export modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(4px);
}

.modal-sheet {
  background: white;
  border-radius: 20px;
  padding: 24px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 -4px 40px rgba(0,0,0,0.2);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: 16px;
}

.modal-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s;
}

.modal-option:active { background: var(--warm-gray); }

.modal-option svg {
  width: 22px;
  height: 22px;
  color: var(--amber);
}

.modal-option-label {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--charcoal);
}

/* Empty state (mobile) */
.mobile-empty {
  text-align: center;
  padding: 60px 40px;
}

.mobile-empty h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: 10px;
}

.mobile-empty p {
  font-size: 0.9rem;
  color: var(--mid-gray);
  line-height: 1.6;
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-article-item {
  animation: fadeInUp 0.3s ease both;
}

/* Hide desktop-only elements on mobile */
@media (max-width: 768px) {
  .reader-hero { display: none !important; }
  .cards-grid { display: none !important; }
  .mobile-nav { display: flex !important; }
  .mobile-header { display: flex !important; }
}

@media (min-width: 769px) {
  .mobile-nav { display: none !important; }
  .mobile-header { display: none !important; }
  .mobile-article-list { display: none !important; }
  .tag-filter { display: none !important; }
  .search-bar-wrap { display: none !important; }
  .reading-mode { display: none !important; }
  .bookmarks-view { display: none !important; }
  .settings-view { display: none !important; }
  .mobile-empty { display: none !important; }
  .recs-view { display: none !important; }
}