:root {
  --bg: #0e0e12;
  --bg2: #17171d;
  --bg3: #22222b;
  --fg: #e8e8ee;
  --dim: #9a9aa8;
  --accent: #4f8cff;
  --accent2: #35c26a;
  --danger: #e5484d;
  --bar-h: 44px;
  --gap: 4px;
  --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

.hidden { display: none !important; }
.dim { color: var(--dim); font-size: 12px; }
kbd {
  background: var(--bg3); border: 1px solid #333; border-bottom-width: 2px;
  border-radius: 4px; padding: 1px 5px; font-size: 11px; font-family: inherit;
}

/* ---------- Topbar ---------- */
#topbar {
  height: var(--bar-h);
  display: flex; align-items: center; gap: 8px;
  padding: 0 10px;
  background: var(--bg2);
  border-bottom: 1px solid #000;
  flex: none;
  overflow-x: auto;
  scrollbar-width: none;
}
#topbar::-webkit-scrollbar { display: none; }
.brand { font-weight: 700; white-space: nowrap; color: var(--accent); }
.brand span { color: var(--fg); }
.topbar-actions { display: flex; gap: 6px; margin-left: auto; }

.tb {
  background: var(--bg3); color: var(--fg);
  border: 1px solid #333; border-radius: 6px;
  padding: 6px 10px; cursor: pointer; font-size: 13px;
  white-space: nowrap; touch-action: manipulation;
}
.tb:hover { background: #2c2c38; border-color: #555; }
.tb.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.tb.danger { color: var(--danger); }
.volume-wrap {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg3); border: 1px solid #333; border-radius: 6px;
  padding: 4px 8px; min-width: 120px;
}
.volume-wrap input[type="range"] {
  width: 100%; accent-color: var(--accent);
  cursor: pointer;
}
.big-btn {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: 12px 22px; font-size: 16px; cursor: pointer;
}

/* Chrome hidden mode */
body.chrome-hidden #topbar { display: none; }
body.chrome-hidden .tile-bar { opacity: 0; pointer-events: none; }
/* In hidden-UI mode the per-tile bar still reveals on hover — and must stay
   clickable (audio focus, expand, close, etc.), so restore pointer events too. */
body.chrome-hidden .tile:hover .tile-bar,
body.chrome-hidden .tile.bar-pinned .tile-bar { opacity: 1; pointer-events: auto; }
body.chrome-hidden .tile-num { opacity: 0; }
body.chrome-hidden #grid { --gap: 0px; }
#chrome-restore {
  position: fixed; top: 0; left: 50%; transform: translateX(-50%);
  z-index: 50; background: rgba(20,20,26,.85); color: var(--dim);
  border: 0; border-radius: 0 0 8px 8px; padding: 3px 14px; cursor: pointer;
  font-size: 12px; opacity: 0; transition: opacity .2s;
}
body.chrome-hidden #chrome-restore { opacity: .25; }
body.chrome-hidden #chrome-restore:hover { opacity: 1; }

/* ---------- Grid ---------- */
#grid {
  flex: 1; min-height: 0;
  display: grid; gap: var(--gap); padding: var(--gap);
  grid-auto-rows: 1fr;
}
#grid.layout-focus .tile { min-height: 0; }

/* ---------- Tile ---------- */
.tile {
  position: relative;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  min-width: 0; min-height: 0;
  outline: 2px solid transparent;
  outline-offset: -2px;
  transition: outline-color .15s;
}
.tile.audio-focus { outline-color: var(--accent2); }
.tile-player, .tile-player iframe, .tile-player video {
  position: absolute; inset: 0; width: 100%; height: 100%; border: 0;
  background: #000;
}
.tile-player video { object-fit: contain; }

/* click-capture shield so single click focuses audio instead of hitting iframe */
.tile-shield {
  position: absolute; inset: 0; z-index: 2;
  background: transparent;
}
.tile.shield-off .tile-shield { display: none; }

.tile-num {
  position: absolute; top: 6px; left: 6px; z-index: 4;
  background: rgba(0,0,0,.6); color: var(--dim);
  font-size: 11px; padding: 1px 6px; border-radius: 4px;
  pointer-events: none; transition: opacity .2s;
}
.tile.audio-focus .tile-num { color: var(--accent2); }

.tile-bar {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 5;
  display: flex; align-items: center; gap: 4px;
  padding: 6px;
  background: linear-gradient(transparent, rgba(0,0,0,.75));
  opacity: 0; transition: opacity .18s;
}
.tile:hover .tile-bar, .tile.bar-pinned .tile-bar { opacity: 1; }
@media (hover: none) { .tile-bar { opacity: 1; } }

.tile-name {
  flex: 1; min-width: 0;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-size: 12px; text-shadow: 0 1px 2px #000;
}
.tbtn {
  background: rgba(30,30,38,.8); color: var(--fg);
  border: 1px solid #444; border-radius: 5px;
  width: 30px; height: 26px; cursor: pointer; font-size: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  flex: none; touch-action: manipulation;
}
.tbtn:hover { background: #333; }
.tbtn.on { background: var(--accent); border-color: var(--accent); }
.tile-hint {
  position: absolute; inset: 0; z-index: 1;
  display: flex; align-items: center; justify-content: center;
  color: var(--dim); font-size: 12px; text-align: center; padding: 12px;
}

/* ---------- Empty hint ---------- */
#empty-hint {
  position: fixed; inset: var(--bar-h) 0 0 0;
  display: flex; align-items: center; justify-content: center; text-align: center;
}
#empty-hint h1 { color: var(--accent); margin-bottom: 8px; }
#empty-hint p { margin: 10px 0; }

/* ---------- Overlays / modals ---------- */
.overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,.6);
  display: flex; align-items: flex-start; justify-content: center;
  padding: 8vh 12px 12px;
  backdrop-filter: blur(2px);
}
.modal, .palette {
  background: var(--bg2); border: 1px solid #333; border-radius: 12px;
  width: 100%; max-width: 560px;
  max-height: 84dvh; display: flex; flex-direction: column;
  box-shadow: 0 12px 40px rgba(0,0,0,.6);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 14px; border-bottom: 1px solid #2a2a33;
}
.modal-foot {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 12px 14px; border-top: 1px solid #2a2a33;
}

/* Quick switcher */
#switcher-input {
  background: var(--bg3); color: var(--fg);
  border: 0; border-bottom: 1px solid #2a2a33; border-radius: 12px 12px 0 0;
  padding: 14px; font-size: 16px; outline: none; width: 100%;
}
.palette-target {
  padding: 6px 14px; font-size: 12px; color: var(--dim);
  border-bottom: 1px solid #2a2a33;
}
.chips {
  display: flex; gap: 6px; flex-wrap: wrap;
  padding: 8px 14px 4px; border-bottom: 1px solid #2a2a33;
}
.chips:empty { display: none; }
.chip {
  background: var(--bg3); color: var(--dim); border: 1px solid #333;
  border-radius: 12px; padding: 2px 10px; font-size: 12px; cursor: pointer;
}
.chip:hover { color: var(--fg); border-color: #555; }
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }

#switcher-results { list-style: none; overflow-y: auto; flex: 1; min-height: 0; }
#switcher-results li {
  padding: 10px 14px; cursor: pointer; display: flex; gap: 10px; align-items: center;
}
#switcher-results li.sel { background: var(--bg3); }
#switcher-results .r-type {
  flex: none; font-size: 10px; text-transform: uppercase;
  color: var(--dim); border: 1px solid #333; border-radius: 4px; padding: 1px 5px;
}
#switcher-results .r-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.palette-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 10px 14px; border-top: 1px solid #2a2a33; flex-wrap: wrap;
}

/* Channel manager */
.chan-add { display: flex; gap: 6px; padding: 12px 14px; flex-wrap: wrap; }
.chan-add input {
  background: var(--bg3); color: var(--fg); border: 1px solid #333;
  border-radius: 6px; padding: 8px; flex: 1; min-width: 120px;
}
.chan-add input#chan-url { flex: 2; }
#chan-list { list-style: none; overflow-y: auto; flex: 1; min-height: 0; }
#chan-list li {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-bottom: 1px solid #1e1e26;
}
#chan-list .c-info { flex: 1; min-width: 0; cursor: pointer; }
#chan-list .c-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#chan-list .c-url { font-size: 11px; color: var(--dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.help-table { border-collapse: collapse; margin: 8px 0; width: 100%; }
.help-table td { padding: 6px 14px; border-bottom: 1px solid #1e1e26; }
.help-table td:first-child { white-space: nowrap; color: var(--dim); }

/* ---------- Toast ---------- */
#toast {
  position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%);
  z-index: 200; background: var(--bg3); border: 1px solid #444;
  border-radius: 8px; padding: 10px 16px; font-size: 13px;
  box-shadow: 0 6px 24px rgba(0,0,0,.5);
  max-width: 90vw;
}

/* ---------- Mobile ---------- */
@media (max-width: 700px) {
  .tb { padding: 6px 8px; font-size: 12px; }
  /* focus layout on phones: big tile on top, others stacked in a scrollable strip */
  #grid.layout-focus {
    display: flex !important; flex-direction: column;
    overflow-y: auto;
  }
  #grid.layout-focus .tile { grid-area: auto !important; grid-column: auto !important; }
  #grid.layout-focus .tile.is-big { flex: none; height: 56dvh; }
  #grid.layout-focus .tile:not(.is-big) { flex: none; height: 110px; }
}