/* ─── Reset & Base ─── */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --accent: #563acc;
  --accent-light: #7c5cff;
  --bg-color: #fff;
  --text-color: #333;
  --text-muted: #666;
  --text-light: #999;
  --border-color: #e8e8e8;
  --card-bg: #fafafa;
  --badge-bg: #f5f5f5;
  --badge-text: #666;
  --font-size-base: 14px;
  --font-size-small: 12px;
  --font-size-title: 15px;
  --font-size-meta: 12px;
  --font-size-filter: 13px;
  --font-size-date: 20px;
  --font-size-empty: 18px;
}

/* ─── Themes ─── */
[data-theme="light"] {
  --bg-color: #fff;
  --text-color: #333;
  --text-muted: #666;
  --text-light: #999;
  --accent: #563acc;
  --accent-light: #7c5cff;
  --border-color: #e8e8e8;
  --card-bg: #fafafa;
  --badge-bg: #f5f5f5;
  --badge-text: #666;
}

[data-theme="dark"] {
  --bg-color: #0d0d0d;
  --text-color: #ffffff;
  --text-muted: #cccccc;
  --text-light: #888888;
  --accent: #7c5cff;
  --accent-light: #9a7fff;
  --border-color: #333;
  --card-bg: #1a1a1a;
  --badge-bg: #2a2a2a;
  --badge-text: #aaaaaa;
}

[data-theme="sepia"] {
  --bg-color: #f4ecd8;
  --text-color: #5b4636;
  --text-muted: #8b7355;
  --text-light: #a09080;
  --accent: #8b6914;
  --accent-light: #a67c1a;
  --border-color: #d4c4a8;
  --card-bg: #fdf6e3;
  --badge-bg: #e8dcc8;
  --badge-text: #8b7355;
}

/* ─── Font Families ─── */
[data-font="system"] { --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; }
[data-font="serif"] { --font-family: Georgia, 'Times New Roman', Times, serif; }
[data-font="sans-serif"] { --font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif; }
[data-font="monospace"] { --font-family: 'SF Mono', Menlo, Monaco, 'Cascadia Code', Consolas, monospace; }
[data-font="inter"] { --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
[data-font="ibm-plex-sans"] { --font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
[data-font="jetbrains-mono"] { --font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', Consolas, monospace; }
[data-font="source-code-pro"] { --font-family: 'Source Code Pro', 'SF Mono', 'Roboto Mono', Consolas, monospace; }
[data-font="merriweather"] { --font-family: 'Merriweather', Georgia, 'Times New Roman', serif; }
[data-font="oxanium"] { --font-family: 'Oxanium', sans-serif; }

/* ─── Font Sizes ─── */
[data-font-size="small"] {
  --font-size-base: 11px;
  --font-size-small: 10px;
  --font-size-title: 12px;
  --font-size-meta: 10px;
  --font-size-filter: 11px;
  --font-size-date: 16px;
  --font-size-empty: 14px;
}

[data-font-size="medium"] {
  --font-size-base: 14px;
  --font-size-small: 12px;
  --font-size-title: 15px;
  --font-size-meta: 12px;
  --font-size-filter: 13px;
  --font-size-date: 20px;
  --font-size-empty: 18px;
}

[data-font-size="large"] {
  --font-size-base: 20px;
  --font-size-small: 17px;
  --font-size-title: 22px;
  --font-size-meta: 17px;
  --font-size-filter: 19px;
  --font-size-date: 28px;
  --font-size-empty: 26px;
}

[data-font-size="xlarge"] {
  --font-size-base: 26px;
  --font-size-small: 22px;
  --font-size-title: 30px;
  --font-size-meta: 22px;
  --font-size-filter: 24px;
  --font-size-date: 36px;
  --font-size-empty: 32px;
}

/* ─── Body ─── */
body {
  font-family: var(--font-family, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
  font-size: var(--font-size-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ─── Header Line ─── */
.header-line {
  height: 3px;
  background: var(--accent);
}

/* ─── App Header ─── */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 4px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}

.settings-toggle {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
}

/* ─── Pull to Refresh ─── */
#pull-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 10px;
  padding-top: 50px;
  height: 100px;
  transform: translateY(-100px);
  opacity: 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
  pointer-events: none;
  z-index: 99;
  color: var(--text-muted);
  font-size: 13px;
  gap: 4px;
}

#pull-indicator svg {
  width: 20px;
  height: 20px;
  transition: transform 0.2s ease;
}

#pull-indicator.loading .pull-arrow {
  display: none;
}

#pull-indicator .pull-spinner {
  display: none;
}

#pull-indicator.loading .pull-spinner {
  display: block;
}

.spinner-circle {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* ─── Main Content ─── */
main {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px 16px;
}

@media (min-width: 1200px) {
  main { max-width: 1200px; }
}

/* ─── Filter Bar ─── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  padding: 4px;
}

.filter-btn {
  padding: 6px 12px;
  border-radius: 4px;
  text-decoration: none;
  font-size: var(--font-size-filter);
  font-weight: 500;
  color: var(--text-muted);
  background: var(--badge-bg);
  transition: all 0.15s ease;
  border: 1px solid transparent;
  cursor: pointer;
}

.filter-btn:hover {
  color: var(--text-color);
  background: var(--card-bg);
  border-color: var(--border-color);
}

.filter-btn.active {
  color: #fff;
  background: var(--accent);
}

.filter-btn.active:hover {
  background: var(--accent-light);
}

/* ─── Date Header ─── */
.date-header-main {
  text-align: left;
  padding: 16px 4px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--accent);
}

.date-header-main h2 {
  font-size: var(--font-size-date);
  font-weight: 600;
  color: var(--text-color);
  margin: 0;
}

.offline-banner {
  font-size: var(--font-size-small);
  color: var(--accent);
  margin-top: 8px;
  font-weight: 500;
}

/* ─── Day Navigation ─── */
.day-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 16px 0;
  padding: 8px 4px;
  gap: 16px;
}

.day-btn {
  padding: 10px 16px;
  background: var(--badge-bg);
  color: var(--text-color);
  text-decoration: none;
  border-radius: 4px;
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: background 0.15s ease;
  white-space: nowrap;
}

.day-btn:hover {
  background: var(--border-color);
}

.day-btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.results-info {
  font-size: var(--font-size-small);
  color: var(--text-light);
}

/* ─── Posts List ─── */
.posts-list {
  display: flex;
  flex-direction: column;
}

.post {
  display: flex;
  flex-direction: column;
  gap: 0.4em;
  padding: 1em 0;
  border-bottom: 1px solid var(--border-color);
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.post:last-child {
  border-bottom: none;
}

.post:hover {
  opacity: 0.8;
}

/* ─── Post Domain Line ─── */
.post-domain {
  display: flex;
  align-items: center;
  gap: 0.4em;
  font-size: var(--font-size-small);
  color: var(--text-light);
  line-height: 1;
}

.post-favicon {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  flex-shrink: 0;
  opacity: 0.8;
}

.domain-text {
  font-size: var(--font-size-small);
  color: var(--text-light);
}

/* ─── Post Title ─── */
.post-title {
  font-size: var(--font-size-title);
  font-weight: 500;
  line-height: 1.4;
  color: var(--text-color);
  margin: 0;
  word-break: break-word;
}

/* ─── Post Meta ─── */
.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6em;
  font-size: var(--font-size-meta);
  color: var(--text-light);
  margin-top: 0.2em;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  white-space: nowrap;
}

.meta-icon {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
  opacity: 0.7;
}

/* ─── Score & Link ─── */
.post-score-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-small);
  color: var(--text-light);
  margin-top: 0.2em;
}

.score-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15em 0.4em;
  background: var(--accent);
  border-radius: 3px;
  font-size: calc(var(--font-size-meta) * 0.9);
  font-weight: 600;
  color: #fff;
}

.external-link {
  color: var(--text-light);
  text-decoration: none;
  font-size: 16px;
}

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

/* ─── Loading & Empty States ─── */
.loading-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state h3 {
  font-size: var(--font-size-empty);
  margin-bottom: 8px;
  color: var(--text-color);
}

/* ─── Footer ─── */
footer {
  max-width: 800px;
  margin: 40px auto;
  padding: 20px 16px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: var(--font-size-small);
  color: var(--text-light);
}

footer a {
  color: var(--text-muted);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (min-width: 1200px) {
  footer { max-width: 1200px; }
}

/* ─── Settings Modal ─── */
#settings-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 16px;
}

.settings-panel {
  background: var(--bg-color);
  border: 2px solid var(--accent);
  border-radius: 8px;
  width: 100%;
  max-width: 400px;
  max-height: 80vh;
  overflow-y: auto;
  padding: 1.5rem;
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.settings-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--text-color);
}

#close-settings {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-color);
  cursor: pointer;
}

.settings-section {
  margin-bottom: 1.5rem;
}

.settings-section label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-color);
  font-size: 0.9rem;
}

.settings-section select {
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
  background: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
}

.instances-list {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 8px;
  margin-bottom: 8px;
}

.instance-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  font-size: var(--font-size-small);
}

.instance-item input[type="checkbox"] {
  cursor: pointer;
}

.add-instance {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.add-instance input {
  flex: 1;
  padding: 0.5rem;
  font-size: 0.9rem;
  background: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.add-instance button,
.reset-btn {
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  background: var(--badge-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
}

.add-instance button:hover,
.reset-btn:hover {
  background: var(--border-color);
}

/* ─── Focus States ─── */
.filter-btn:focus-visible,
.day-btn:focus-visible,
.post:focus-visible,
.settings-toggle:focus-visible,
#close-settings:focus-visible,
.add-instance button:focus-visible,
.reset-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ─── Mobile ─── */
@media (max-width: 480px) {
  main { padding: 0.75em; }
  .filter-bar { gap: 0.4em; }
  .filter-btn { padding: 0.4em 0.6em; font-size: var(--font-size-small); }
  .day-navigation { gap: 0.5em; padding: 0.75em 0.5em; }
  .day-btn { padding: 0.5em 0.75em; font-size: var(--font-size-small); }
  .date-header-main h2 { font-size: calc(var(--font-size-date) * 0.9); }
  .settings-panel { max-height: 90vh; padding: 1rem; }
}

/* ─── About Page Highlight Box ─── */
.highlight {
  background: var(--card-bg);
  border-left: 4px solid var(--accent);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 4px 4px 0;
}

.highlight p {
  margin: 0;
  color: var(--text-color);
}

.highlight code {
  background: var(--badge-bg);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: var(--font-size-small);
}

/* ─── Post Detail Page ─── */
.post-detail {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 24px;
}

.post-detail-title {
  font-size: var(--font-size-title);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--text-color);
}

.post-detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-size: var(--font-size-meta);
  color: var(--text-muted);
  margin-bottom: 16px;
}

.post-detail-meta a {
  color: var(--text-muted);
  text-decoration: none;
}

.post-detail-meta a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.post-detail-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.action-btn {
  padding: 8px 16px;
  background: var(--badge-bg);
  color: var(--text-color);
  text-decoration: none;
  border-radius: 4px;
  font-size: var(--font-size-meta);
  font-weight: 500;
  transition: background 0.15s ease;
  border: none;
  cursor: pointer;
}

.action-btn:hover {
  background: var(--border-color);
}

.action-btn.primary {
  background: var(--accent);
  color: #fff;
}

.action-btn.primary:hover {
  background: var(--accent-light);
}

/* ─── Comments Section ─── */
.comments-section {
  margin-top: 32px;
}

.comments-header {
  font-size: var(--font-size-date);
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
}

.comment {
  margin-bottom: 8px;
  padding: 8px 0;
}

.comment-indent-0 { margin-left: 0; padding-left: 16px; border-left: 2px solid var(--accent); }
.comment-indent-1 { margin-left: 16px; padding-left: 16px; border-left: 2px solid var(--border-color); }
.comment-indent-2 { margin-left: 16px; padding-left: 16px; border-left: 2px solid var(--border-color); }
.comment-indent-3 { margin-left: 16px; padding-left: 16px; border-left: 2px solid var(--border-color); }
.comment-indent-4 { margin-left: 16px; padding-left: 16px; border-left: 2px solid var(--border-color); }
.comment-indent-5 { margin-left: 16px; padding-left: 16px; border-left: 2px solid var(--border-color); max-width: calc(100% - 80px); }

.comment-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: var(--font-size-small);
}

.comment-author {
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.comment-author:hover {
  text-decoration: underline;
}

.comment-time {
  color: var(--text-light);
}

.comment-text {
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-color);
  word-wrap: break-word;
}

.comment-text p {
  margin-bottom: 10px;
  margin-top: 0;
}

.comment-text p:last-child {
  margin-bottom: 0;
}

.comment-text a {
  color: var(--accent);
  text-decoration: none;
}

.comment-text a:hover {
  text-decoration: underline;
}

.no-comments {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
  font-style: italic;
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: var(--font-size-base);
}

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

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}