:root{
  /* Alturas controladas por variáveis para alinhar header + chips + sidebar */
  --header-h: 56px;
  --chips-h: 48px;

  color-scheme: dark;
  --yt-red: #ff0033;
  --bg: #0f0f0f;
  --bg-elev: #161616;
  --bg-elev-2: #1e1e1e;
  --text: #f1f1f1;
  --text-dim: #aaaaaa;
  --border: #242424;
  --chip: #202020;
  --chip-active: #fff;
  --chip-active-bg: #ffffff14;
  --accent: #8ab4f8;
  --focus: 2px solid var(--accent);
}

:root[data-theme="light"]{
  color-scheme: light;
  --bg: #ffffff;
  --bg-elev: #fff;
  --bg-elev-2: #fff;
  --text: #0f0f0f;
  --text-dim: #5a5a5a;
  --border: #e6e6e6;
  --chip: #f0f0f0;
  --chip-active: #0f0f0f;
  --chip-active-bg: #e9f5ff;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", Arial, "Noto Sans";
}

/* =========== TOPBAR =========== */
.topbar{
  position: sticky; top: 0; z-index: 40;
  height: var(--header-h);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
}
.toolbar{
  width: 100%;
  max-width: 1680px;
  margin: 0 auto;
  padding: 0 12px;
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  align-items: center;
  gap: 12px;
}

.left, .center, .right{ display: flex; align-items: center; }
.left{ gap: 8px; }
.right{ justify-content: flex-end; gap: 6px; }

.icon-btn{
  background: transparent; color: var(--text);
  border: 0; padding: 8px; border-radius: 10px; cursor: pointer;
}
.icon-btn:hover{ background: #ffffff12; }
.icon-btn:focus-visible{ outline: var(--focus); }

.brand{ display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand-logo{ height: 20px; object-fit: contain; }
.yt-fallback{ display: inline-flex; align-items: center; gap: 8px; }
.yt-fallback .play-triangle{
  width: 22px; height: 16px; border-radius: 3px; background: var(--yt-red);
  clip-path: polygon(35% 20%, 35% 80%, 80% 50%);
}
.brand-text{ font-weight: 800; letter-spacing: .2px; }

/* Busca mais leve e bem alinhada */
.search{
  display: grid; grid-template-columns: minmax(0,1fr) auto auto; align-items: center;
  max-width: 720px; width: 100%; gap: 8px; margin: 0 auto;
}
.search input{
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-right: 0;
  padding: 10px 12px; border-radius: 999px 0 0 999px;
}
.search .search-btn{
  border: 1px solid var(--border); border-left: 0;
  background: var(--bg-elev); color: var(--text);
  padding: 8px 18px; border-radius: 0 999px 999px 0; cursor: pointer;
}
.search .mic{ background: var(--bg-elev); margin-left: -4px; border-radius: 999px; }
.search .search-btn:hover, .search .mic:hover{ background: var(--bg-elev-2); }

.badge{
  position: relative; left: -10px; top: -8px;
  font-size: 10px; padding: 2px 5px; border-radius: 10px;
  background: #e33; color: #fff;
}

.avatar{
  width: 32px; height: 32px; border-radius: 999px; border: 0;
  background: linear-gradient(135deg, #ffc400, #ffea7a); color: #000;
  font-weight: 900; cursor: pointer;
}

/* Topbar encolhe ao rolar */
.topbar.shrink{ --header-h: 52px; }
.topbar.shrink .search input{ padding: 8px 12px; }
.topbar.shrink .icon-btn{ padding: 6px; }

/* =========== CHIPS BAR (separada) =========== */
.chips-bar{
  position: sticky; top: var(--header-h); z-index: 39;
  height: var(--chips-h);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: grid; grid-template-columns: 48px 1fr 48px; align-items: center;
}
.chips-nav{
  width: 40px; height: 40px; border-radius: 999px; border: 0;
  background: transparent; color: var(--text); cursor: pointer; margin: 0 4px;
}
.chips-viewport{
  position: relative; height: 100%;
  mask-image: linear-gradient(90deg, transparent 0, #000 24px, #000 calc(100% - 24px), transparent 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 24px, #000 calc(100% - 24px), transparent 100%);
}
.chips{
  display: flex; gap: 10px; overflow: auto; padding: 8px 8px; height: 100%; align-items: center; scroll-behavior: smooth;
}
.chips::-webkit-scrollbar{ display: none; }
.chip{
  color: var(--text); background: var(--chip); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: 999px; white-space: nowrap; cursor: pointer;
}
.chip:hover{ background: #ffffff12; }
.chip.active{ background: var(--chip-active-bg); color: var(--chip-active); border-color: #8ab4f8; }

/* =========== SIDEBAR / CONTEÚDO =========== */
.sidebar{
  position: fixed; top: calc(var(--header-h) + var(--chips-h)); left: 0; bottom: 0;
  width: 240px; overflow: auto; background: var(--bg);
  border-right: 1px solid var(--border);
  transition: width .2s ease, top .2s ease;
}
.sidebar.collapsed{ width: 76px; }
.sidebar nav{ padding: 8px; }
.nav-item{
  display: grid; grid-template-columns: 24px 1fr; align-items: center; gap: 16px;
  padding: 10px 12px; border-radius: 10px; color: var(--text); text-decoration: none;
}
.nav-item:hover{ background: #ffffff12; }
.nav-item.active{ background: #ffffff1c; }
.section-title{
  color: var(--text-dim); font-weight: 700; padding: 8px 12px; margin-top: 4px;
  text-transform: uppercase; font-size: 12px;
}
.sidebar hr{ border: 0; border-top: 1px solid var(--border); margin: 8px 0; }

.content{
  margin-left: 240px; padding: 16px; transition: margin-left .2s ease;
}
.sidebar.collapsed ~ .content{ margin-left: 76px; }

/* Shorts, Grid, Skeleton, Mini player, Toast, Help – iguais à versão anterior */
.shelf{ margin-bottom: 20px; }
.shelf-head{ display: flex; align-items: center; gap: 8px; padding: 6px 2px; }
.shelf-head h2{ font-size: 18px; margin: 0; }
.shorts-row{ display: grid; gap: 12px; grid-auto-flow: column; grid-auto-columns: 160px; overflow: auto; padding-bottom: 8px; }
.short{ position: relative; border-radius: 12px; overflow: hidden; height: 284px; background: #222; border: 1px solid var(--border); }
.short .duration{ position: absolute; bottom: 6px; right: 6px; background: #000c; color:#fff; font-weight: 800; font-size: 12px; padding: 3px 6px; border-radius: 6px; }
.short video, .short img{ width: 100%; height: 100%; object-fit: cover; display:block; }

.videos-grid{ display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.card{ display: grid; gap: 10px; outline: none; }
.card:focus-visible{ outline: 2px solid var(--accent); border-radius: 12px; }
.thumb{ position: relative; background: #111; border-radius: 12px; overflow: hidden; aspect-ratio: 16 / 9; border: 1px solid var(--border); transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease; }
.thumb:hover{ transform: translateY(-2px); border-color: #8ab4f8; box-shadow: 0 4px 30px #0006; }
.thumb video{ width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb .time, .thumb .live{ position: absolute; bottom: 8px; right: 8px; background: #000c; color: #fff; font-weight: 800; font-size: 12px; padding: 4px 6px; border-radius: 4px; }
.thumb .live{ background: #e22; }
.thumb .ad-badge{ position: absolute; top: 8px; left: 8px; background: #ffd000; color: #000; font-weight: 900; font-size: 11px; padding: 2px 6px; border-radius: 4px; }
.quick-actions{ position: absolute; inset: auto 8px 8px 8px; display: none; gap: 8px; grid-auto-flow: column; justify-content: space-between; }
.thumb:hover .quick-actions{ display: grid; }
.qbtn{ display: inline-flex; align-items: center; gap: 6px; background: #000c; backdrop-filter: blur(4px); color: #fff; border: 1px solid #ffffff30; padding: 6px 8px; border-radius: 10px; cursor: pointer; font-weight: 700; }
.qbtn:hover{ background: #000e; }
.card-body{ display: grid; grid-template-columns: 40px 1fr auto; gap: 10px; }
.avatar-sm{ width: 40px; height: 40px; border-radius: 999px; background: #666; background-image: radial-gradient(circle at 30% 30%, #999, #555); }
.title{ font-weight: 800; color: var(--text); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.meta{ color: var(--text-dim); font-size: 13px; display:flex; align-items:center; gap:6px; }
.meta .verified{ color:#3ea6ff; font-size: 18px; transform: translateY(2px); }
.more{ color: var(--text-dim); }
.more .material-symbols-outlined{ font-size: 20px; }

.skeleton-grid{ display: grid; gap: 18px; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); margin-top: 12px; }
.skeleton-card{ display: grid; gap: 10px; }
.skeleton-thumb, .skeleton-line{ background: linear-gradient(90deg, #0000, #ffffff10, #0000), #1a1a1a; background-size: 200% 100%; animation: shimmer 1.2s linear infinite; border-radius: 12px; }
.skeleton-thumb{ aspect-ratio: 16 / 9; }
.skeleton-line{ height: 12px; border-radius: 6px; }
@keyframes shimmer{ from{ background-position: -200% 0; } to{ background-position: 200% 0; } }

.mini-player{ position: fixed; right: 16px; bottom: 16px; width: 360px; max-width: calc(100vw - 32px); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--bg-elev); box-shadow: 0 10px 30px #0008; z-index: 50; }
.mini-player video{ width: 100%; height: auto; display: block; background:#000; }
.mini-controls{ position: absolute; right: 6px; top: 6px; display: flex; gap: 6px; }
.mini-title{ padding: 8px 10px; color: var(--text); }

.toast{ position: fixed; left: 16px; bottom: 16px; padding: 10px 14px; background: #000c; color: #fff; border: 1px solid #ffffff25; border-radius: 12px; backdrop-filter: blur(8px); box-shadow: 0 10px 30px #0008; display: none; z-index: 60; }
.toast.show{ display: block; animation: toastIn .2s ease; }
@keyframes toastIn{ from{ transform: translateY(10px); opacity: 0; } to{ transform: translateY(0); opacity: 1; } }

.help{ border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: var(--bg-elev); color: var(--text); }
.help ul{ margin: 10px 0 16px; padding-left: 18px; }
kbd{ background: #000; padding: 2px 6px; border-radius: 6px; border: 1px solid #ffffff22; }

@media (max-width: 1000px){
  .toolbar{ grid-template-columns: auto 1fr auto; }
  .search{ display: none; } /* YouTube faz isso em telas menores */
}
@media (max-width: 900px){
  .mini-player{ width: 300px; }
}