:root {
  --bg: #fafafa;
  --fg: #0f1419;
  --muted: #536471;
  --border: #ebeef0;
  --card: #ffffff;
  --accent: #1d9bf0;
  --accent-fg: #ffffff;
  --link: #1d9bf0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15202b;
    --fg: #e7e9ea;
    --muted: #71767b;
    --border: #2f3336;
    --card: #1c2f41;
    --accent: #1d9bf0;
    --accent-fg: #ffffff;
    --link: #1d9bf0;
  }
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
  font-size: 15px;
}

header {
  text-align: center;
  padding: 1.5rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #1d9bf0;
}

.subtitle {
  color: var(--muted);
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

.sort-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin: 1rem 0 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.sort-controls select {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

main {
  max-width: 600px;
  margin: 0 auto;
  padding: 1.5rem 1rem 4rem;
}

.loading {
  text-align: center;
  color: var(--muted);
  padding: 3rem 0;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 3rem 1rem;
}

/* --- Tweet card --- */
.tweet-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  transition: border-color 0.15s;
}

.tweet-card:hover {
  border-color: var(--muted);
}

.tweet-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--border);
}

.author {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.author-name {
  font-weight: 700;
  color: var(--fg);
}

.author-handle {
  color: var(--muted);
  font-size: 0.9rem;
}

.tweet-text {
  margin: 0.5rem 0 0.75rem;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.tweet-text.truncated {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tweet-text-toggle {
  background: none;
  border: none;
  color: var(--link);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.25rem 0;
  font-family: inherit;
}

.tweet-text-toggle:hover {
  text-decoration: underline;
}

.tweet-media {
  margin: 0.75rem 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.tweet-media img,
.tweet-media video {
  display: block;
  width: 100%;
  height: auto;
}

.tweet-media.folded .media-item {
  display: none;
}

.media-toggle {
  background: none;
  border: none;
  color: var(--link);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.25rem 0;
  font-family: inherit;
  margin-top: 0.5rem;
}

.media-toggle:hover {
  text-decoration: underline;
}

/* --- Quoted tweet --- */
.quoted-tweet {
  margin: 0.75rem 0;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.02);
  cursor: pointer;
}

@media (prefers-color-scheme: dark) {
  .quoted-tweet {
    background: rgba(255, 255, 255, 0.03);
  }
}

.quoted-tweet:hover {
  border-color: var(--muted);
}

.quoted-tweet-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}

.quoted-author-name {
  font-weight: 700;
  color: var(--fg);
}

.quoted-author-handle {
  color: var(--muted);
}

.quoted-tweet-text {
  font-size: 0.9rem;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--fg);
}

.quoted-tweet-text.truncated {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tweet-stats {
  display: flex;
  gap: 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.tweet-stats span {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.tweet-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.action-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.9rem;
  font-family: inherit;
  padding: 0.3rem 0;
  transition: color 0.15s;
}

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

.action-btn.liked {
  color: #e91e63;
}

.action-btn.disliked {
  color: #607d8b;
}

.action-btn:active {
  transform: scale(0.95);
}

.tweet-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.tweet-link {
  color: var(--link);
  text-decoration: none;
}

.tweet-link:hover {
  text-decoration: underline;
}

.submitter {
  font-style: italic;
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 2rem 1rem;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 600px;
  margin: 0 auto;
}

.footer-content p {
  margin: 0;
}

.footer-content a {
  color: var(--link);
  text-decoration: none;
}

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

.subtitle a {
  color: var(--link);
  text-decoration: none;
}

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

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.pagination-btn {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.15s;
}

.pagination-btn:hover:not(:disabled) {
  border-color: var(--accent);
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pagination-info {
  color: var(--muted);
  font-size: 0.85rem;
}