:root {
  --page: #f7f7f7;
  --panel: #ffffff;
  --line: #c9c9c9;
  --soft: #e7e7e7;
  --text: #222;
  --muted: #666;
  --blue: #173f69;
  --blue2: #4c78a8;
  --red: #cc181e;
  --gold: #ffe35b;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--page); color: var(--text); font-family: Verdana, Arial, sans-serif; }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
.hidden { display: none !important; }
.small { font-size: 12px; }
.muted { color: var(--muted); }

.page { min-height: 100vh; }
.topbar {
  background: linear-gradient(#0f4f94, #083b73);
  color: #fff;
  border-bottom: 1px solid #052347;
  box-shadow: inset 0 -1px 0 rgba(255,255,255,.15);
}
.topbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 14px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}
.logo-wrap { display: flex; align-items: center; gap: 10px; min-width: 220px; }
.yt-logo { font: 700 28px/1 Georgia, 'Times New Roman', serif; color: #fff; letter-spacing: .2px; }
.yt-logo span { color: #ffe000; }
.date-pill { font-size: 11px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); padding: 4px 8px; border-radius: 999px; }
.searchbar { display: flex; flex: 1; max-width: 540px; gap: 8px; }
.searchbar input, .mini-input, .upload-form input, .upload-form textarea, .comment-form textarea, .auth-form input {
  width: 100%;
  border: 1px solid #aaa;
  background: #fff;
  padding: 8px 10px;
  border-radius: 3px;
  outline: none;
}
.searchbar button, .small-btn, .wide-btn, .upload-form button, .comment-form button, .auth-form button {
  border: 1px solid #6b6b6b;
  background: linear-gradient(#fff, #dfdfdf);
  padding: 8px 12px;
  border-radius: 3px;
  cursor: pointer;
}
.searchbar button:hover, .small-btn:hover, .wide-btn:hover, .upload-form button:hover, .comment-form button:hover, .auth-form button:hover { filter: brightness(.98); }
.user-chip { min-width: 220px; display: flex; align-items: center; justify-content: flex-end; gap: 10px; font-size: 12px; }
.navrow { max-width: 1180px; margin: 0 auto; padding: 0 14px 10px; display: flex; gap: 8px; }
.navlink {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 12px;
  background: #f2f2f2;
  border: 1px solid #8eb0d9;
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  color: #0c3f74;
  font-size: 12px;
}
.navlink.active { background: #fff; font-weight: bold; }
.layout { max-width: 1180px; margin: 14px auto 28px; padding: 0 14px; }
.view { background: transparent; }
.view-pad { padding: 14px; }
.content-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 14px; align-items: start; }
.box {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(255,255,255,.75) inset;
}
.box-title { font: 700 16px Georgia, 'Times New Roman', serif; color: var(--blue); margin-bottom: 8px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.feed-box, .watch-box, .upload-shell { padding: 14px; }
.video-feed { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.video-card { display: grid; grid-template-columns: 140px 1fr; gap: 12px; padding: 10px; border: 1px solid #ddd; background: #fff; }
.thumb {
  width: 140px;
  height: 84px;
  background: linear-gradient(135deg, #313131, #8c8c8c);
  position: relative;
  overflow: hidden;
  border: 1px solid #666;
}
.thumb::after {
  content: attr(data-letter);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 26px;
  color: rgba(255,255,255,.9);
  font-family: Georgia, 'Times New Roman', serif;
}
.video-title { font-weight: bold; color: #0d4076; margin-bottom: 4px; }
.video-meta, .watch-desc, .comment-meta, .account-meta { font-size: 12px; color: var(--muted); }
.video-desc { font-size: 12px; color: #333; line-height: 1.45; margin-top: 4px; }
.video-actions { margin-top: 8px; display: flex; gap: 8px; flex-wrap: wrap; }
.player { width: 100%; max-height: 540px; background: #000; margin: 12px 0; border: 1px solid #999; }
.watch-desc { margin-top: 8px; line-height: 1.45; white-space: pre-wrap; }
.divider { border-top: 1px solid #ddd; margin: 14px 0; }
.comment-form, .upload-form, .auth-form { display: flex; flex-direction: column; gap: 10px; }
.comment-list { display: flex; flex-direction: column; gap: 10px; margin-top: 14px; }
.comment { border: 1px solid #ddd; background: #fafafa; padding: 10px; border-radius: 3px; }
.comment-head { display: flex; justify-content: space-between; gap: 10px; }
.comment-user { font-weight: bold; font-size: 12px; color: #0d4076; }
.comment-body { margin-top: 6px; font-size: 13px; line-height: 1.45; white-space: pre-wrap; }
.account-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; max-height: 560px; overflow: auto; }
.account-card { border: 1px solid #dadada; background: #fafafa; padding: 10px; border-radius: 3px; display: grid; grid-template-columns: 38px 1fr; gap: 10px; align-items: center; }
.account-badge { width: 38px; height: 38px; border-radius: 50%; background: linear-gradient(#eee, #ccc); display: grid; place-items: center; font-weight: bold; color: #0d4076; }
.account-name { font-weight: bold; font-size: 13px; }
.filter-row { display: grid; gap: 8px; margin-top: 10px; }
.filter-inline { grid-template-columns: 1fr 220px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.upload-form label, .auth-form label { display: block; font-size: 12px; margin-bottom: 5px; color: #444; }
.upload-form textarea, .comment-form textarea { resize: vertical; }
.upload-meta { font-size: 12px; color: var(--muted); }
.empty { padding: 16px; border: 1px dashed #bbb; background: #fcfcfc; color: var(--muted); text-align: center; font-size: 13px; }
.empty-home { min-height: 380px; display: grid; place-items: center; font-size: 14px; color: var(--muted); }
.auth-overlay { position: fixed; inset: 0; background: rgba(255,255,255,.96); display: grid; place-items: center; padding: 16px; }
.auth-shell { width: min(460px, 100%); border: 1px solid #bbb; background: #fff; padding: 18px; box-shadow: 0 3px 20px rgba(0,0,0,.12); }
.auth-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.logo-mark { width: 44px; height: 32px; background: var(--red); color: #fff; display: grid; place-items: center; border-radius: 4px; font-size: 18px; }
.brand-title { font: 700 26px Georgia, 'Times New Roman', serif; color: #173f69; }
.brand-subtitle { font-size: 12px; color: var(--muted); }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 12px 0; }
.auth-tabs button { padding: 10px; border: 1px solid #999; background: linear-gradient(#fff, #dfdfdf); }
.auth-tabs button.active { background: linear-gradient(#ffe, #f1e39f); }
.auth-error { color: #a00000; min-height: 20px; margin-top: 10px; font-size: 13px; }
.auth-note { margin-top: 10px; font-size: 12px; color: var(--muted); line-height: 1.4; }
.check { font-size: 12px; color: #444; user-select: none; }
.field-row { display: flex; justify-content: space-between; align-items: center; }

@media (max-width: 1024px) {
  .topbar-inner, .layout, .content-grid { display: grid; grid-template-columns: 1fr; }
  .logo-wrap, .user-chip, .searchbar { min-width: 0; }
  .searchbar { max-width: none; }
  .filter-inline, .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .video-card { grid-template-columns: 1fr; }
  .thumb { width: 100%; }
}