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

:root {
  --bg: #f0f2f5;
  --surface: #ffffff;
  --surface-hover: #f7f8fa;
  --border: #e4e6ea;
  --primary: #2AABEE;
  --primary-dark: #1a8fc7;
  --text: #1a1a1a;
  --text-secondary: #6b7280;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="dark"] {
  --bg: #0f1117;
  --surface: #1c1f26;
  --surface-hover: #22252e;
  --border: #2e3340;
  --primary: #2AABEE;
  --primary-dark: #55c0f5;
  --text: #e8eaf0;
  --text-secondary: #8b95a8;
  --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.header-inner {
  max-width: 680px; margin: 0 auto;
  padding: 12px 16px;
  display: flex; align-items: center; gap: 12px;
}
.channel-avatar { width: 44px; height: 44px; flex-shrink: 0; border-radius: 50%; overflow: hidden; }
.channel-avatar svg { width: 100%; height: 100%; }
.channel-avatar img { width: 100%; height: 100%; object-fit: cover; }
.channel-info { flex: 1; min-width: 0; }
.channel-name { font-size: 1rem; font-weight: 700; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.channel-handle {
  font-size: 0.8rem; color: var(--primary); margin-top: 1px;
  text-decoration: none; display: block;
}
.channel-handle:hover { text-decoration: underline; }

.updated-badge {
  display: flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 20px;
  background: var(--bg); font-size: 0.72rem;
  color: var(--text-secondary); white-space: nowrap; flex-shrink: 0;
}

/* ===== Feed ===== */
.feed-container { max-width: 680px; margin: 0 auto; padding: 16px 12px 48px; }

/* ===== Post Card ===== */
.post-card {
  background: var(--surface); border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 12px; overflow: hidden;
  transition: box-shadow 0.2s;
  animation: fadeInUp 0.25s ease;
}
.post-card:hover { box-shadow: var(--shadow-md); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== Media ===== */
.post-media {
  position: relative; background: #111;
  max-height: 480px; overflow: hidden; cursor: pointer;
}
.post-media img {
  display: block; width: 100%; height: auto;
  max-height: 480px; object-fit: cover;
}
.post-media video {
  display: block; width: 100%; max-height: 480px; object-fit: contain; background: #000;
}

/* Gallery */
.media-gallery {
  display: grid; gap: 2px; background: #000;
  max-height: 480px; overflow: hidden; cursor: pointer;
}
.media-gallery.g1 { grid-template-columns: 1fr; }
.media-gallery.g2 { grid-template-columns: 1fr 1fr; }
.media-gallery.g3 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }
.media-gallery.g3 .gi:first-child { grid-row: span 2; }
.media-gallery.g4 { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }

.gi { overflow: hidden; position: relative; min-height: 120px; }
.gi img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.2s; }
.gi:hover img { transform: scale(1.03); }
.gi-more {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 1.5rem; font-weight: 700;
}

/* Video play overlay */
.play-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  pointer-events: none;
}
.play-icon {
  width: 56px; height: 56px;
  background: rgba(0,0,0,0.6); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.post-media:hover .play-icon { background: rgba(0,0,0,0.8); }
.play-icon::after {
  content: ''; border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent white;
  margin-left: 4px;
}

/* ===== Post Body ===== */
.post-body { padding: 14px 16px 4px; }
.post-text {
  font-size: 0.95rem; line-height: 1.58; color: var(--text);
  white-space: pre-wrap; word-break: break-word;
}
.post-text a { color: var(--primary); text-decoration: none; }
.post-text a:hover { text-decoration: underline; }
.post-text.truncated {
  display: -webkit-box; -webkit-line-clamp: 8;
  -webkit-box-orient: vertical; overflow: hidden;
}
.read-more-btn {
  background: none; border: none; color: var(--primary);
  cursor: pointer; font-size: 0.875rem; padding: 6px 0;
  font-family: var(--font); display: block; margin-top: 2px;
}
.read-more-btn:hover { color: var(--primary-dark); }

/* ===== Post Footer ===== */
.post-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 16px 12px; gap: 8px; flex-wrap: wrap;
}
.post-date { font-size: 0.78rem; color: var(--text-secondary); }
.post-meta { display: flex; align-items: center; gap: 14px; }
.stat {
  display: flex; align-items: center; gap: 4px;
  font-size: 0.8rem; color: var(--text-secondary);
}
.stat svg { width: 14px; height: 14px; opacity: 0.7; }
.tg-link {
  font-size: 0.78rem; color: var(--primary);
  text-decoration: none; display: flex; align-items: center; gap: 4px;
}
.tg-link:hover { text-decoration: underline; }

/* ===== Spinner ===== */
.loading-spinner {
  display: flex; flex-direction: column; align-items: center;
  gap: 12px; padding: 32px 16px;
  color: var(--text-secondary); font-size: 0.9rem;
}
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Load More ===== */
.load-more-wrap { text-align: center; padding: 16px 0; }
.load-more-btn {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px; padding: 10px 28px;
  font-size: 0.9rem; font-family: var(--font);
  color: var(--primary); cursor: pointer; font-weight: 600;
  transition: background 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow);
}
.load-more-btn:hover { background: var(--surface-hover); box-shadow: var(--shadow-md); }
.load-more-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== States ===== */
.empty-state, .error-state {
  text-align: center; padding: 48px 24px; color: var(--text-secondary);
}
.empty-icon, .error-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state h2, .error-state h2 { font-size: 1.1rem; color: var(--text); margin-bottom: 8px; }
.empty-state p, .error-state p { font-size: 0.9rem; line-height: 1.5; }

/* ===== Lightbox ===== */
.lightbox {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.92);
  display: flex; align-items: center; justify-content: center;
}
.lightbox-content { max-width: 92vw; max-height: 90vh; position: relative; }
.lightbox-content img, .lightbox-content video {
  max-width: 92vw; max-height: 90vh; object-fit: contain;
  display: block; border-radius: 4px;
}
.lightbox-close {
  position: fixed; top: 16px; right: 20px;
  background: rgba(255,255,255,0.15); border: none; color: white;
  font-size: 1.8rem; width: 40px; height: 40px; border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  line-height: 1; transition: background 0.2s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.28); }
.lightbox-prev, .lightbox-next {
  position: fixed; top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,0.15); border: none; color: white;
  font-size: 1.4rem; width: 44px; height: 44px; border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: background 0.2s;
}
.lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,0.28); }
.lightbox-prev { left: 12px; }
.lightbox-next { right: 12px; }

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  width: 52px; height: 28px;
  cursor: pointer; flex-shrink: 0;
  position: relative;
  transition: background 0.3s, border-color 0.3s;
  padding: 0;
}
.theme-toggle-thumb {
  position: absolute;
  top: 3px; left: 3px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--primary);
  transition: transform 0.3s, background 0.3s;
  display: flex; align-items: center; justify-content: center;
}
.theme-toggle-thumb svg {
  width: 12px; height: 12px;
  fill: white;
  position: absolute;
  transition: opacity 0.2s;
}
.theme-toggle-thumb .icon-sun  { opacity: 1; }
.theme-toggle-thumb .icon-moon { opacity: 0; }

[data-theme="dark"] .theme-toggle-thumb {
  transform: translateX(24px);
}
[data-theme="dark"] .theme-toggle-thumb .icon-sun  { opacity: 0; }
[data-theme="dark"] .theme-toggle-thumb .icon-moon { opacity: 1; }

.hidden { display: none !important; }

/* ===== Responsive ===== */
@media (min-width: 600px) {
  .feed-container { padding: 20px 16px 56px; }
  .post-card { margin-bottom: 16px; }
  .media-gallery, .post-media { max-height: 520px; }
}
@media (max-width: 380px) {
  .channel-name { font-size: 0.9rem; }
  .updated-badge { display: none; }
}