/* ── Reset ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ── Variables ── */
:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --text: #1a1a1a;
  --text-secondary: #6b6b6b;
  --text-tertiary: #9a9a9a;
  --accent: #c0392b;
  --border: #e8e6e1;
  --font-body: 'Georgia', 'Times New Roman', serif;
  --font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --feed-width: 620px;
}

/* ── Base ── */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: contain;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
}

/* ── Header ── */
#header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1rem;
  gap: 0.75rem;
}

#header h1 {
  font-family: 'Palatino Linotype', Palatino, 'Book Antiqua', serif;
  font-size: 1.25rem;
  font-weight: bold;
  font-style: italic;
  color: #c0392b;
  letter-spacing: 0;
}

#header button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

#header button:hover {
  color: var(--text);
}

#header button svg {
  display: block;
}

#settings-btn {
  position: absolute;
  left: 1rem;
}

#search-btn {
  position: absolute;
  right: 3rem;
}

#refresh-btn {
  position: absolute;
  right: 1rem;
}

#refresh-btn.spinning svg {
  animation: spin 0.8s linear infinite;
}

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

/* ── Search bar ── */
#search-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 1rem;
  gap: 0.4rem;
}

#search-bar[hidden] {
  display: none;
}

#search-input {
  width: 280px;
  max-width: 60%;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  outline: none;
  background: var(--bg);
  color: var(--text);
}

#search-input:focus {
  border-color: var(--accent);
}

#search-close {
  background: none;
  border: none;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text-tertiary);
  padding: 0.2rem;
}

#search-close:hover {
  color: var(--text);
}

/* Search highlight */
mark.search-match {
  background: #fef08a;
  color: inherit;
  padding: 0 1px;
  border-radius: 2px;
}

/* ── Filter bar ── */
#filter-bar {
  position: sticky;
  top: 2.75rem;
  z-index: 99;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  flex-wrap: wrap;
}

#filter-bar[hidden] {
  display: none;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.filter-divider {
  width: 1px;
  height: 1.1rem;
  background: var(--border);
  margin: 0 0.3rem;
}

.filter-chip {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.18rem 0.55rem;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.filter-chip:hover {
  border-color: var(--text-tertiary);
  color: var(--text);
}

.filter-chip.is-active {
  background: var(--text);
  color: var(--surface);
  border-color: var(--text);
}

/* ── Feed ── */
#feed {
  max-width: var(--feed-width);
  margin: 0 auto;
  padding: 0.5rem 1rem 4rem;
}

/* ── Article Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-top: 0.6rem;
  transition: box-shadow 0.15s ease;
  will-change: transform;
}

.card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

/* ── Compact view (default) ── */
.card-compact {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.compact-content {
  flex: 1;
  min-width: 0;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 400;
  line-height: 1.3;
  margin: 0;
  /* Truncate to 2 lines in compact */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-title a {
  color: var(--text);
  text-decoration: none;
}

.card-title a:hover {
  color: var(--accent);
}

.card-meta-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
  font-family: var(--font-ui);
  font-size: 0.7rem;
}

.card-source {
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  text-decoration: none;
  cursor: pointer;
}

.card-source:hover {
  text-decoration: underline;
}

.card-time {
  color: var(--text-tertiary);
}

.card-chevron {
  font-size: 1.2rem;
  color: var(--text-tertiary);
  flex-shrink: 0;
  transition: transform 0.2s ease;
  line-height: 1;
}

.is-expanded .card-chevron {
  transform: rotate(90deg);
}

/* ── Expanded view (hidden by default) ── */
.card-expanded {
  display: none;
  padding: 0 1rem 0.8rem;
}

.is-expanded .card-expanded {
  display: block;
}

.is-expanded .card-title {
  display: block;
  -webkit-line-clamp: unset;
  overflow: visible;
}

.card-summary {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.45;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── New item highlight ── */
.card-new {
  animation: highlight-fade 60s ease-out forwards;
}

.related-new {
  animation: highlight-fade-subtle 60s ease-out forwards;
}

@keyframes highlight-fade {
  0%   { background-color: #fef9e7; }
  90%  { background-color: #fef9e7; }
  100% { background-color: var(--surface); }
}

@keyframes highlight-fade-subtle {
  0%   { background-color: #fef9e7; }
  90%  { background-color: #fef9e7; }
  100% { background-color: transparent; }
}

/* ── Read articles (ultra-compact) ── */
.card-read {
  opacity: 0.45;
}

.card-read .card-compact {
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
}

.card-read .card-title {
  font-size: 0.82rem;
  -webkit-line-clamp: 1;
}

.card-read .card-meta-line {
  display: none;
}

.card-read .card-chevron {
  display: none;
}

/* Restore on expand */
.card-read.is-expanded {
  opacity: 0.7;
}

.card-read.is-expanded .card-compact {
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
}

.card-read.is-expanded .card-title {
  font-size: 0.95rem;
  -webkit-line-clamp: 2;
}

.card-read.is-expanded .card-meta-line {
  display: flex;
}

.card-read.is-expanded .card-chevron {
  display: block;
}

/* ── Cluster card ── */
.card-cluster {
  border-left: 3px solid var(--accent);
}

.cluster-badge {
  display: inline-block;
  background: #f0d0cc;
  color: var(--accent);
  font-size: 0.6rem;
  font-weight: 600;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.card-related {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.related-label {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.35rem;
}

.related-item {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.2rem 0;
  line-height: 1.3;
  flex-wrap: wrap;
}

.related-source {
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
}

.related-source:hover {
  text-decoration: underline;
}

.related-link {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-decoration: none;
  flex: 1;
  min-width: 0;
}

.related-link:hover {
  color: var(--accent);
}

.related-time {
  font-family: var(--font-ui);
  font-size: 0.62rem;
  color: var(--text-tertiary);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Settings panel ── */
#settings-panel {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 300;
  background: var(--bg);
  overflow-y: auto;
  display: none;
}

#settings-panel.is-open {
  display: block;
}

.settings-header {
  position: sticky;
  top: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
}

.settings-header h2 {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 700;
}

.settings-close {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-secondary);
}

.settings-close:hover {
  color: var(--text);
}

.settings-body {
  max-width: var(--feed-width);
  margin: 0 auto;
  padding: 0.5rem 1rem 2rem;
}

.settings-section-title {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 1rem 0 0.4rem;
}

.feed-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.feed-toggle-info {
  flex: 1;
  min-width: 0;
}

.feed-toggle-name {
  font-family: var(--font-ui);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
}

.feed-toggle-url {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.feed-toggle-info.is-disabled .feed-toggle-name {
  color: var(--text-tertiary);
  text-decoration: line-through;
}

/* Toggle switch */
.toggle-switch {
  position: relative;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
  margin-left: 0.75rem;
}

/* ── Database info ── */
.db-info {
  padding: 0.3rem 0;
}

.db-info-loading {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.db-info-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}

.db-info-label {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  flex-shrink: 0;
}

.db-info-value {
  font-family: var(--font-ui);
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-align: right;
}

.db-clear-btn {
  display: block;
  width: 100%;
  margin-top: 1rem;
  padding: 0.6rem 1rem;
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  background: none;
  border: 1px solid var(--accent);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.db-clear-btn:hover {
  background: var(--accent);
  color: #fff;
}

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

.toggle-track {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--border);
  border-radius: 22px;
  transition: background 0.2s ease;
}

.toggle-track::after {
  content: '';
  position: absolute;
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s ease;
}

.toggle-switch input:checked + .toggle-track {
  background: var(--accent);
}

.toggle-switch input:checked + .toggle-track::after {
  transform: translateX(18px);
}

/* ── Source view ── */
.source-header {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  margin-bottom: 0.4rem;
}

.source-back {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--accent);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 0.3rem;
}

.source-back:hover {
  text-decoration: underline;
}

.source-title {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin: 0;
}

.source-count {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  color: var(--text-tertiary);
  display: block;
  margin-top: 0.15rem;
}

/* ── Status bar ── */
#status {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  color: var(--text-tertiary);
}

#mark-all-read {
  color: var(--accent);
  text-decoration: none;
  opacity: 0.6;
  font-size: 0.72rem;
}

#mark-all-read:hover {
  opacity: 1;
  text-decoration: underline;
}

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-tertiary);
  font-family: var(--font-ui);
  font-size: 0.9rem;
}

/* ── Pull to refresh ── */
#pull-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 0;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--bg);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  z-index: 200;
  opacity: 0;
}

#pull-indicator .pull-arrow {
  font-size: 1.1rem;
  transition: transform 0.2s ease;
}

#pull-indicator.ready .pull-arrow {
  transform: rotate(180deg);
}

#pull-indicator.refreshing .pull-arrow {
  animation: spin 0.8s linear infinite;
}

/* ── Responsive ── */
@media (max-width: 660px) {
  #feed {
    padding: 0.25rem 0 4rem;
  }

  .card {
    border-radius: 0;
    border-right: none;
    border-left: none;
    margin-top: 0;
    border-bottom: none;
  }

  .card-cluster {
    border-left: 3px solid var(--accent);
  }

  .card + .card {
    border-top: 1px solid var(--border);
  }

  .card-compact {
    padding: 0.6rem 0.75rem;
  }

  .card-expanded {
    padding: 0 0.75rem 0.7rem;
  }
}