:root {
  --bg:           #0f0f0f;
  --surface:      #1a1a1a;
  --card:         #242424;
  --card-hover:   #2d2d2d;
  --border:       #333;
  --text:         #e0e0e0;
  --text-muted:   #888;
  --accent:       #ff8c00;
  --accent-hover: #ff6a00;
  --danger:       #e53935;
  --radius:       8px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

img { display: block; max-width: 100%; }

button {
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  transition: background .15s, color .15s;
}

/* ─── Header ─────────────────────────────────────────────── */

header {
  background: #111;
  border-bottom: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  overflow: hidden;
}

body {
  padding-top: 57px;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  white-space: nowrap;
  letter-spacing: -0.5px;
}

.logo span { color: var(--text); }

.search-bar {
  flex: 1;
  display: flex;
  max-width: 500px;
  min-width: 0;
}

.search-bar input {
  flex: 1;
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  color: var(--text);
  padding: 8px 14px;
  font-size: 14px;
  outline: none;
}

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

.search-bar button {
  background: var(--accent);
  color: #fff;
  padding: 8px 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.search-bar button:hover { background: var(--accent-hover); }

.header-actions { display: flex; gap: 8px; margin-left: auto; }

.btn { padding: 8px 16px; border-radius: var(--radius); font-weight: 600; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-sm { padding: 5px 12px; font-size: 13px; }

/* user menu */
.user-menu { position: relative; }
.user-avatar {
  width: 34px; height: 34px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 15px; color: #fff;
  cursor: pointer;
}
.user-dropdown {
  display: none;
  position: absolute; right: 0; top: 42px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 160px;
  z-index: 200;
}
.user-dropdown.open { display: block; }
.user-dropdown a, .user-dropdown button {
  display: block; width: 100%;
  padding: 10px 16px;
  text-align: left;
  background: none;
  color: var(--text);
  font-size: 14px;
  border-radius: 0;
  border-bottom: 1px solid var(--border);
}
.user-dropdown a:last-child, .user-dropdown button:last-child { border-bottom: none; }
.user-dropdown a:hover, .user-dropdown button:hover { background: var(--card-hover); color: var(--accent); }

/* ─── Layout ─────────────────────────────────────────────── */

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 20px;
}

.page-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text);
}

.page-title span { color: var(--text-muted); font-weight: 400; font-size: 15px; margin-left: 8px; }

/* ─── Video Grid ─────────────────────────────────────────── */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .15s, box-shadow .15s;
  cursor: pointer;
}

.card:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(0,0,0,.5); }

.card-thumb {
  position: relative;
  aspect-ratio: 16/9;
  background: #111;
  overflow: hidden;
}

.card-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .2s;
}

.card:hover .card-thumb img { transform: scale(1.04); }

.card-thumb .no-thumb {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 36px; color: var(--border);
  background: linear-gradient(135deg, #1a1a1a, #252525);
}

.card-duration {
  position: absolute; bottom: 6px; right: 6px;
  background: rgba(0,0,0,.8);
  color: #fff; font-size: 11px; font-weight: 600;
  padding: 2px 6px; border-radius: 4px;
}

.card-dots {
  position: absolute; bottom: 6px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 4px; pointer-events: none;
}
.card-dots span {
  width: 5px; height: 5px; border-radius: 50%;
  background: rgba(255,255,255,0.4); transition: background .2s;
}
.card-dots span.active { background: #fff; }

.card-body { padding: 10px 12px 12px; }

.card-title {
  font-size: 13px; font-weight: 600;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--text);
  margin-bottom: 6px;
}

.card-meta { color: var(--text-muted); font-size: 12px; display: flex; gap: 8px; align-items: center; }

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

/* ─── Load More ──────────────────────────────────────────── */

.load-more-wrap { text-align: center; margin-top: 32px; }

.btn-load {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 40px;
  font-size: 14px;
  font-weight: 600;
}

.btn-load:hover { border-color: var(--accent); color: var(--accent); }

/* ─── Modal ──────────────────────────────────────────────── */

.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.75);
  z-index: 500;
  align-items: center;
  justify-content: center;
}
.modal-backdrop.open { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 100%; max-width: 400px;
  padding: 32px;
}

.modal h2 { font-size: 20px; margin-bottom: 6px; }
.modal .sub { color: var(--text-muted); font-size: 13px; margin-bottom: 24px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; color: var(--text-muted); font-size: 12px; margin-bottom: 6px; }
.form-group input {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 10px 14px;
  font-size: 14px;
  outline: none;
}
.form-group input:focus { border-color: var(--accent); }

.form-actions { display: flex; gap: 10px; margin-top: 8px; }
.form-actions button { flex: 1; padding: 11px; font-weight: 700; }

.modal-switch { text-align: center; margin-top: 18px; color: var(--text-muted); font-size: 13px; }
.modal-switch a { color: var(--accent); cursor: pointer; }

.alert { padding: 10px 14px; border-radius: var(--radius); font-size: 13px; margin-bottom: 14px; display: none; }
.alert.error { background: rgba(229,57,53,.15); border: 1px solid var(--danger); color: #ff6b6b; display: block; }
.alert.success { background: rgba(76,175,80,.15); border: 1px solid #4caf50; color: #81c784; display: block; }

/* ─── Tag chips ──────────────────────────────────────────── */

.tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tag-chip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 12px;
  color: var(--text-muted);
  transition: all .15s;
}
.tag-chip:hover { border-color: var(--accent); color: var(--accent); background: rgba(255,140,0,.07); }

/* ─── Tag page header ────────────────────────────────────── */

.tag-header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 24px;
}

.tag-header h1 { font-size: 22px; font-weight: 800; color: var(--accent); margin-bottom: 6px; }
.tag-header p { color: var(--text-muted); font-size: 14px; line-height: 1.6; }

/* ─── Post page ──────────────────────────────────────────── */

.post-layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.player-wrap {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16/9;
  position: relative;
}

.player-wrap video {
  width: 100%; height: 100%;
  display: block;
}

.post-info { margin-top: 16px; }

.post-title-row {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: 16px;
  margin-bottom: 12px;
}

.post-title { font-size: 18px; font-weight: 700; line-height: 1.4; }

.post-stats { color: var(--text-muted); font-size: 13px; margin-bottom: 16px; }
.post-stats span { margin-right: 16px; }

.post-actions { display: flex; gap: 10px; margin-bottom: 20px; }

.btn-like {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 18px;
  display: flex; align-items: center; gap: 6px;
}
.btn-like:hover, .btn-like.liked { background: rgba(255,140,0,.12); border-color: var(--accent); color: var(--accent); }

.post-author-bar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.author-avatar {
  width: 42px; height: 42px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px; color: #fff;
  flex-shrink: 0;
}

.author-name { font-weight: 600; font-size: 15px; }
.author-name a:hover { color: var(--accent); }
.author-sub { color: var(--text-muted); font-size: 12px; }

.btn-follow {
  margin-left: auto;
  background: var(--accent);
  color: #fff;
  padding: 7px 18px;
  font-weight: 600;
}
.btn-follow:hover { background: var(--accent-hover); }
.btn-follow.following { background: var(--card); border: 1px solid var(--border); color: var(--text); }
.btn-follow.following:hover { border-color: var(--danger); color: var(--danger); }

/* ─── Comments ───────────────────────────────────────────── */

.comments-section { margin-top: 24px; }
.comments-section h3 { font-size: 16px; font-weight: 700; margin-bottom: 16px; }

.comment-form { display: flex; gap: 10px; margin-bottom: 20px; }
.comment-form input {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 9px 14px;
  font-size: 14px;
  outline: none;
}
.comment-form input:focus { border-color: var(--accent); }
.comment-form button { background: var(--accent); color: #fff; padding: 9px 18px; font-weight: 600; }
.comment-form button:hover { background: var(--accent-hover); }

.comment-list { display: flex; flex-direction: column; gap: 14px; }

.comment {
  display: flex; gap: 10px;
}

.comment-avatar {
  width: 32px; height: 32px;
  background: var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; flex-shrink: 0;
}

.comment-body { flex: 1; }
.comment-author { font-weight: 600; font-size: 13px; margin-bottom: 3px; }
.comment-author span { color: var(--text-muted); font-weight: 400; font-size: 12px; margin-left: 8px; }
.comment-text { font-size: 13px; color: var(--text); line-height: 1.5; }

/* ─── Reply ──────────────────────────────────────────────── */

.reply-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  padding: 4px 0;
  margin-top: 4px;
  cursor: pointer;
  border-radius: 0;
}
.reply-btn:hover { color: var(--accent); }

.reply-item {
  margin-top: 10px;
  padding-left: 16px;
  border-left: 2px solid var(--border);
}

/* ─── Sidebar (post page) ────────────────────────────────── */

.sidebar-title { font-size: 15px; font-weight: 700; margin-bottom: 14px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; font-size: 12px; }

.sidebar-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}

.sidebar-card { display: flex; flex-direction: column; gap: 7px; cursor: pointer; }
.sidebar-card:hover .sidebar-card-title { color: var(--accent); }

.sidebar-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: #111;
  border-radius: 6px;
  overflow: hidden;
}

.sidebar-thumb img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-thumb .no-thumb { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; color: var(--border); font-size: 20px; }

.sidebar-card-info { min-width: 0; }
.sidebar-card-title { font-size: 12px; font-weight: 600; line-height: 1.4; margin-bottom: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sidebar-card-meta { font-size: 11px; color: var(--text-muted); }

/* ─── Profile page ───────────────────────────────────────── */

.profile-header {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  display: flex; align-items: center; gap: 20px;
  margin-bottom: 24px;
}

.profile-avatar-big {
  width: 80px; height: 80px;
  background: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; font-weight: 800; color: #fff;
  flex-shrink: 0;
}

.profile-info h1 { font-size: 22px; font-weight: 800; margin-bottom: 6px; }

.profile-stats { display: flex; gap: 24px; margin-top: 12px; }
.profile-stat { text-align: center; }
.profile-stat-num { font-size: 18px; font-weight: 700; color: var(--accent); }
.profile-stat-label { font-size: 12px; color: var(--text-muted); }

/* ─── Empty / Loading states ─────────────────────────────── */

.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty .icon { font-size: 48px; margin-bottom: 16px; }
.empty p { font-size: 15px; }

.suggestions-header {
  display: flex; align-items: baseline; gap: 10px;
  margin: 32px 0 16px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}
.suggestions-title { font-size: 18px; font-weight: 700; }
.suggestions-sub { font-size: 13px; color: var(--text-muted); }

.spinner {
  display: flex; justify-content: center; padding: 40px;
}
.spinner::after {
  content: '';
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Search page ────────────────────────────────────────── */

.search-header {
  margin-bottom: 24px;
}

.search-big {
  display: flex;
  max-width: 700px;
}

.search-big input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  color: var(--text);
  padding: 12px 18px;
  font-size: 16px;
  outline: none;
}
.search-big input:focus { border-color: var(--accent); }

.search-big button {
  background: var(--accent);
  color: #fff;
  padding: 12px 24px;
  font-size: 15px;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.search-big button:hover { background: var(--accent-hover); }

/* ─── Toast ──────────────────────────────────────────────── */

.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  font-size: 14px;
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: all .3s;
}
.toast.show { transform: none; opacity: 1; }
.toast.ok { border-color: #4caf50; color: #81c784; }
.toast.err { border-color: var(--danger); color: #ff6b6b; }

/* ─── Responsive ─────────────────────────────────────────── */

@media (max-width: 600px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 12px;
  }
  .logo { font-size: 18px; }
  .header-actions { margin-left: auto; }
  .search-bar {
    order: 3;
    flex-basis: 100%;
    max-width: none;
  }
  body { padding-top: 90px; }
  .container { padding: 16px 12px; }
  .grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
}