:root { --bg:#212121; --panel:#2b2b2b; --line:#3a3a3a; --text:#eee; --dim:#9e9e9e; --accent:#ff5722; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; height: 100vh; background: var(--bg); color: var(--text);
  font: 14px/1.4 Roboto, Arial, sans-serif;
  display: grid; grid-template: 56px 1fr 88px / 220px 1fr;
  grid-template-areas: "top top" "side main" "play play";
}
.topbar { grid-area: top; background: var(--panel); border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; padding: 0 20px; }
.logo { font-size: 20px; color: var(--accent); font-weight: 500; }
#status { color: var(--dim); font-size: 12px; }
.sidebar { grid-area: side; background: var(--panel); padding: 12px 0; }
.sidebar button { display: block; width: 100%; text-align: left; padding: 12px 24px;
  background: none; border: 0; border-left: 3px solid transparent; color: var(--dim);
  font-size: 14px; cursor: pointer; }
.sidebar button:hover { color: var(--text); }
.sidebar button.active { color: var(--accent); border-left-color: var(--accent); background: #333; }
main { grid-area: main; overflow-y: auto; padding: 24px 32px; }
h2 { font-weight: 400; margin: 0 0 16px; }
.card { max-width: 340px; margin: 60px auto; background: var(--panel); padding: 24px; border-radius: 4px; }
input[type=text], input[type=password] { width: 100%; margin-bottom: 12px; padding: 10px;
  background: var(--bg); border: 1px solid var(--line); color: var(--text); border-radius: 3px; }
input[type=text]:focus, input[type=password]:focus, textarea:focus { outline: 0; border-color: var(--accent); }
button.primary { width: 100%; padding: 10px; background: var(--accent); color: #fff;
  border: 0; border-radius: 3px; cursor: pointer; font-weight: 500; }
button.primary:disabled { opacity: .5; cursor: default; }
button.secondary, .secondary-btn { display: inline-block; padding: 9px 16px; background: #3a3a3a; color: var(--text);
  border: 0; border-radius: 3px; cursor: pointer; font-size: 13px; }
button.secondary:hover, .secondary-btn:hover { background: #4a4a4a; }
.err { color: #ef5350; margin-top: 10px; min-height: 18px; }

/* shared pieces used by several features */
.thumb { width: 48px; height: 48px; border-radius: 3px; background: #3a3a3a center / cover no-repeat;
  display: flex; align-items: center; justify-content: center; color: var(--dim); font-size: 20px; flex-shrink: 0; }
.thumb.lg { width: 96px; height: 96px; font-size: 36px; }
.field { display: block; margin-bottom: 16px; }
.field > span { display: block; color: var(--dim); font-size: 12px; margin-bottom: 4px; }
.field input[type=text] { margin-bottom: 0; }
.switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; }
.switch input { display: none; }
.switch .track { width: 38px; height: 20px; border-radius: 10px; background: #555; position: relative; transition: .2s; flex-shrink: 0; }
.switch .track::after { content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px;
  border-radius: 50%; background: #fff; transition: .2s; }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { left: 20px; }

/* search + sort bar */
.tools { display: flex; gap: 10px; margin-bottom: 14px; }
.tools .search { flex: 1; max-width: 360px; margin-bottom: 0; }
.tools select { padding: 9px 10px; background: var(--bg); color: var(--text);
  border: 1px solid var(--line); border-radius: 3px; }

/* the ⋮ pop-up menu */
.menu { position: fixed; z-index: 80; min-width: 190px; background: #333; border-radius: 4px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, .5); padding: 6px 0; }
.menu button { display: block; width: 100%; text-align: left; padding: 9px 16px; background: none;
  border: 0; color: var(--text); font-size: 13px; cursor: pointer; }
.menu button:hover { background: #444; }