/* ============================================
   Cron Digest Viewer — Main Styles
   ============================================ */

:root {
  --bg: #f5f5f5;
  --fg: #333;
  --card-bg: #ffffff;
  --card-shadow: 0 2px 8px rgba(0,0,0,0.08);
  --card-shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
  --header-bg: #1a1a2e;
  --header-fg: #ffffff;
  --accent: #1565c0;
  --accent-fg: #ffffff;
  --chip-bg: #e8eaf6;
  --chip-fg: #3f51b5;
  --chip-border: #c5cae9;
  --input-border: #ddd;
  --input-focus: #1a1a2e;
  --meta-fg: #666;
  --preview-fg: #555;
  --modal-overlay: rgba(0,0,0,0.6);
  --modal-bg: #ffffff;
  --toc-bg: #f8f9fa;
  --hr: #eee;
  --kbd-bg: #f0f0f0;
  --kbd-fg: #333;
  --calendar-empty: #f0f0f0;
  --calendar-hover: #e3f2fd;
  --calendar-today: #fff3e0;
  --dot-arxiv: #1565c0;
  --dot-web: #7b1fa2;
  --dot-moltbook: #f57f17;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  transition: background 0.3s, color 0.3s;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* ---------- Header ---------- */
header {
  background: var(--header-bg);
  color: var(--header-fg);
  padding: 30px 20px;
  margin-bottom: 30px;
  position: relative;
}
header h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}
header p {
  opacity: 0.8;
}
.header-actions {
  position: absolute;
  top: 20px;
  right: 20px;
  display: flex;
  gap: 10px;
}
.icon-btn {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--header-fg);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}
.icon-btn:hover {
  background: rgba(255,255,255,0.2);
}

/* ---------- Controls ---------- */
.controls {
  display: flex;
  gap: 15px;
  margin-bottom: 15px;
  flex-wrap: wrap;
  align-items: center;
}
.search-box {
  flex: 1;
  min-width: 250px;
  position: relative;
}
.search-box input {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid var(--input-border);
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.2s;
  background: var(--card-bg);
  color: var(--fg);
}
.search-box input:focus {
  outline: none;
  border-color: var(--input-focus);
}
.filter-buttons {
  display: flex;
  gap: 10px;
}
.filter-btn {
  padding: 12px 20px;
  border: 2px solid var(--input-border);
  background: var(--card-bg);
  color: var(--fg);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}
.filter-btn.active {
  background: var(--header-bg);
  color: var(--header-fg);
  border-color: var(--header-bg);
}
.filter-btn:hover:not(.active) {
  border-color: var(--accent);
}

/* View toggle */
.view-toggle {
  display: flex;
  gap: 5px;
}
.view-toggle button {
  padding: 8px 14px;
  border: 1px solid var(--input-border);
  background: var(--card-bg);
  color: var(--fg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.view-toggle button.active {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}

/* ---------- Tag Bar ---------- */
.tag-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  align-items: center;
  min-height: 32px;
}
.tag-bar-label {
  font-size: 13px;
  color: var(--meta-fg);
  font-weight: 500;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 7px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
  background: var(--chip-bg);
  color: var(--chip-fg);
  border: 1px solid var(--chip-border);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  user-select: none;
}
.tag-chip:hover {
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}
.tag-chip.active {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}
.tag-chip .count {
  font-size: 9px;
  opacity: 0.7;
  background: rgba(0,0,0,0.08);
  padding: 1px 4px;
  border-radius: 6px;
}
.tag-chip.active .count {
  background: rgba(255,255,0.2);
}
.tag-clear {
  font-size: 12px;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  margin-left: 4px;
}

/* ---------- Calendar View ---------- */
.calendar-view {
  display: none;
}
.calendar-view.active {
  display: block;
}
.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.calendar-header h2 {
  font-size: 1.5rem;
  color: var(--fg);
}
.calendar-nav {
  display: flex;
  gap: 10px;
}
.calendar-nav button {
  padding: 8px 16px;
  border: 1px solid var(--input-border);
  background: var(--card-bg);
  color: var(--fg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
}
.calendar-nav button:hover {
  background: var(--accent);
  color: var(--accent-fg);
}
.calendar-legend {
  display: flex;
  gap: 20px;
  margin-bottom: 15px;
  padding: 8px 16px;
  background: var(--card-bg);
  border-radius: 8px;
  border: 1px solid var(--input-border);
  font-size: 13px;
  color: var(--meta-fg);
  width: fit-content;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}
.legend-item .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  border: 1px solid rgba(0,0,0,0.15);
}
.legend-item .dot.arxiv { background: var(--dot-arxiv); }
.legend-item .dot.web-science { background: var(--dot-web); }
.legend-item .dot.moltbook { background: var(--dot-moltbook); }
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
}
.calendar-day-header {
  text-align: center;
  font-size: 12px;
  font-weight: 600;
  color: var(--meta-fg);
  padding: 8px;
  text-transform: uppercase;
}
.calendar-day {
  aspect-ratio: auto;
  min-height: 70px;
  background: var(--card-bg);
  border-radius: 10px;
  padding: 8px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  position: relative;
  border: 2px solid transparent;
}
.calendar-day:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--accent);
}
.calendar-day.empty {
  background: var(--calendar-empty);
  cursor: default;
  opacity: 0.5;
}
.calendar-day.empty:hover {
  transform: none;
  box-shadow: none;
  border-color: transparent;
}
.calendar-day.today {
  background: var(--calendar-today);
  position: relative;
}
.calendar-day.today::after {
  content: 'TODAY';
  position: absolute;
  top: 2px;
  right: 4px;
  font-size: 8px;
  font-weight: 700;
  color: #f57f17;
  background: rgba(245, 127, 23, 0.15);
  padding: 1px 4px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.calendar-day .day-number {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
}
.calendar-day .day-dots {
  display: flex;
  gap: 3px;
  margin-top: 6px;
  flex-wrap: wrap;
  justify-content: center;
}
.calendar-day .day-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.calendar-day .dot.arxiv { background: var(--dot-arxiv); }
.calendar-day .dot.web-science { background: var(--dot-web); }
.calendar-day .dot.moltbook { background: var(--dot-moltbook); }
.calendar-day .item-count {
  font-size: 10px;
  color: var(--meta-fg);
  margin-top: 2px;
}

/* ---------- List View ---------- */
.list-view {
  display: none;
}
.list-view.active {
  display: block;
}
.digest-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 20px;
}
.digest-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 25px;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s, box-shadow 0.2s, outline 0.1s;
  cursor: pointer;
  outline: 2px solid transparent;
}
.digest-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow-hover);
}
.digest-card.focused {
  outline: 2px solid var(--accent);
}
.digest-card.hidden {
  display: none;
}
.new-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: linear-gradient(135deg, #ff6b6b, #ee5a5a);
  color: white;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.card-header {
  position: relative;
}
.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}
.chip {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  background: var(--chip-bg);
  color: var(--chip-fg);
  border: 1px solid var(--chip-border);
}
.chip.hep-th { background: #e3f2fd; color: #1565c0; border-color: #90caf9; }
.chip.gr-qc { background: #f3e5f5; color: #7b1fa2; border-color: #ce93d8; }
.chip.quant-ph { background: #e8f5e9; color: #2e7d32; border-color: #a5d6a7; }
.chip.cond-mat { background: #fff3e0; color: #ef6c00; border-color: #ffcc80; }
.chip.cs { background: #fce4ec; color: #c2185b; border-color: #f48fb1; }
.chip.math { background: #e0f2f1; color: #00695c; border-color: #80cbc4; }

.digest-type {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.type-arxiv { background: #e3f2fd; color: #1565c0; }
.type-web { background: #f3e5f5; color: #7b1fa2; }
.type-moltbook { background: #fff8e1; color: #f57f17; }

.digest-date {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--fg);
}
.digest-meta {
  font-size: 14px;
  color: var(--meta-fg);
  margin-bottom: 15px;
}
.digest-preview {
  font-size: 14px;
  color: var(--preview-fg);
  line-height: 1.5;
}
.digest-preview h3 {
  font-size: 14px;
  margin: 4px 0;
  color: var(--fg);
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 12px;
}
.card-tag {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 8px;
  background: var(--chip-bg);
  color: var(--chip-fg);
  border: 1px solid var(--chip-border);
  cursor: pointer;
  transition: background 0.15s;
  user-select: none;
}
.card-tag:hover {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}
.item-count {
  display: inline-block;
  background: var(--kbd-bg);
  color: var(--kbd-fg);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 13px;
  margin-top: 10px;
}

/* ---------- Status Messages ---------- */
.loading {
  text-align: center;
  padding: 60px;
  font-size: 18px;
  color: var(--meta-fg);
}
.error {
  text-align: center;
  padding: 40px;
  background: #ffebee;
  border-radius: 12px;
  color: #c62828;
}
.no-results {
  text-align: center;
  padding: 60px;
  font-size: 18px;
  color: var(--meta-fg);
}
.kbd-hint {
  text-align: center;
  font-size: 12px;
  color: var(--meta-fg);
  margin-top: 10px;
  margin-bottom: 20px;
}
kbd {
  display: inline-block;
  background: var(--kbd-bg);
  color: var(--kbd-fg);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: ui-monospace, monospace;
  font-size: 11px;
  border: 1px solid var(--chip-border);
}

/* ---------- Modal ---------- */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-overlay);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 20px;
}
.modal-overlay.active {
  display: flex;
}
.modal-content {
  background: var(--modal-bg);
  border-radius: 16px;
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 40px;
  position: relative;
  color: var(--fg);
}
.modal-close {
  position: absolute;
  top: 20px;
  right: 25px;
  font-size: 28px;
  cursor: pointer;
  color: var(--meta-fg);
  line-height: 1;
}
.modal-close:hover {
  color: var(--fg);
}
.modal-content h1 {
  font-size: 1.8rem;
  margin-bottom: 15px;
  padding-right: 40px;
  color: var(--fg);
}
.modal-content h2 {
  font-size: 1.3rem;
  margin: 25px 0 10px;
  color: var(--fg);
}
.modal-content h3 {
  font-size: 1.1rem;
  margin: 20px 0 8px;
  color: var(--fg);
}
.modal-toc {
  background: var(--toc-bg);
  border-radius: 8px;
  padding: 15px 20px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.modal-toc h3 {
  font-size: 1rem;
  margin: 0 0 10px 0;
  color: var(--fg);
}
.modal-toc ul {
  margin: 0;
  padding-left: 18px;
}
.modal-toc li {
  margin: 4px 0;
  cursor: pointer;
  color: var(--accent);
}
.modal-toc li:hover {
  text-decoration: underline;
}
.paper-item {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hr);
}
.paper-item:last-child {
  border-bottom: none;
}
.paper-item h2 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.15rem;
}
.paper-item h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.05rem;
}
.paper-item ul {
  margin: 6px 0;
  padding-left: 18px;
}
.paper-item li {
  margin: 2px 0;
  line-height: 1.4;
}
.paper-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 6px 0 10px;
}
.paper-actions {
  display: flex;
  gap: 10px;
  margin: 8px 0 12px;
}
.paper-actions a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.2s;
}
.paper-actions a:hover {
  opacity: 0.85;
}
.btn-abs {
  background: #e3f2fd;
  color: #1565c0;
}
.btn-pdf {
  background: #ffebee;
  color: #c62828;
}

.modal-content a {
  color: var(--accent);
  text-decoration: none;
}
.modal-content a:hover {
  text-decoration: underline;
}
.modal-content ul {
  margin: 10px 0;
  padding-left: 25px;
}
.modal-content li {
  margin: 6px 0;
}
.modal-content hr {
  border: none;
  border-top: 1px solid var(--hr);
  margin: 20px 0;
}

/* ---------- Month-Grouped List View ---------- */
.month-section {
  margin-bottom: 30px;
}
.month-header {
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 12px 0;
  margin-bottom: 15px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg);
  border-bottom: 2px solid var(--accent);
  z-index: 10;
}

/* ---------- Day Modal (Calendar Click) ---------- */
.day-modal-header {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--hr);
}
.day-modal-header h1 {
  margin: 0 0 5px 0;
  font-size: 1.6rem;
}
.day-modal-subtitle {
  color: var(--meta-fg);
  font-size: 14px;
}

.day-modal-digests {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.day-digest-card {
  background: var(--card-bg);
  border: 2px solid var(--input-border);
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
}
.day-digest-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--accent);
}
.day-digest-card.arxiv { border-left: 4px solid var(--dot-arxiv); }
.day-digest-card.web { border-left: 4px solid var(--dot-web); }
.day-digest-card.moltbook { border-left: 4px solid var(--dot-moltbook); }

.day-digest-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.day-digest-type {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border-radius: 20px;
}
.day-digest-type.type-arxiv { background: var(--dot-arxiv); color: white; }
.day-digest-type.type-web { background: var(--dot-web); color: white; }
.day-digest-type.type-moltbook { background: var(--dot-moltbook); color: white; }

.day-digest-count {
  font-size: 13px;
  color: var(--meta-fg);
  font-weight: 500;
}

.day-digest-items {
  margin-bottom: 12px;
}
.day-digest-item {
  font-size: 14px;
  color: var(--fg);
  padding: 6px 0;
  border-bottom: 1px solid var(--hr);
  line-height: 1.5;
}
.day-digest-item:last-child {
  border-bottom: none;
}
.day-digest-item.empty {
  color: var(--meta-fg);
  font-style: italic;
}

.day-digest-footer {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  text-align: right;
  opacity: 0.7;
  transition: opacity 0.15s;
}
.day-digest-card:hover .day-digest-footer {
  opacity: 1;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .calendar-grid {
    gap: 4px;
  }
  .calendar-day {
    padding: 4px;
    border-radius: 6px;
  }
  .calendar-day .day-number {
    font-size: 11px;
  }
  .calendar-day .dot {
    width: 6px;
    height: 6px;
  }
  .digest-grid {
    grid-template-columns: 1fr;
  }
  .controls {
    flex-direction: column;
  }
  .modal-content {
    padding: 25px;
  }
  .header-actions {
    position: static;
    margin-top: 15px;
    justify-content: flex-end;
  }
  .calendar-header h2 {
    font-size: 1.2rem;
  }
}

@media (max-width: 768px) {
  .calendar-grid {
    gap: 4px;
  }
  .calendar-day {
    padding: 4px;
    border-radius: 6px;
  }
  .calendar-day .day-number {
    font-size: 11px;
  }
  .calendar-day .dot {
    width: 6px;
    height: 6px;
  }
  .digest-grid {
    grid-template-columns: 1fr;
  }
  .controls {
    flex-direction: column;
  }
  .modal-content {
    padding: 25px;
  }
  .header-actions {
    position: static;
    margin-top: 15px;
    justify-content: flex-end;
  }
  .calendar-header h2 {
    font-size: 1.2rem;
  }
}