:root {
  --bg: #0a0a0a;
  --panel: #111;
  --panel-2: #1a1a1a;
  --border: #222;
  --border-2: #333;
  --text: #e8e8e8;
  --muted: #888;
  --dim: #555;
  --accent: #ff3366;
  --input-bg: #000;
  --code-bg: #000;
  --scrollbar: #222;
  --active-bg: #1a0f15;
  --modal-overlay: rgba(0, 0, 0, 0.75);
}
body[data-theme="light"] {
  --bg: #f5f5f5;
  --panel: #ffffff;
  --panel-2: #efefef;
  --border: #e2e2e2;
  --border-2: #cfcfcf;
  --text: #1a1a1a;
  --muted: #666;
  --dim: #999;
  --input-bg: #ffffff;
  --code-bg: #f0f0f0;
  --scrollbar: #cfcfcf;
  --active-bg: #ffe5ec;
  --modal-overlay: rgba(0, 0, 0, 0.4);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, monospace;
  overflow: hidden;
}
.app {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 100vh;
}
.app.sidebar-hidden { grid-template-columns: 1fr; }
.app.sidebar-hidden .sidebar { display: none; }
/* Sidebar */
.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 4px;
  overflow: hidden;
}
.brand {
  text-align: center;
  margin-bottom: 16px;
  line-height: 1.1;
}
.brand-jp {
  font-size: 11px;
  letter-spacing: 0.5em;
  color: var(--muted);
  margin-bottom: 4px;
  /* Slight nudge so the wide spacing centers visually */
  padding-left: 0.5em;
}
.brand-en {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.4em;
  color: var(--accent);
  padding-left: 0.4em;
  text-shadow: 0 0 20px rgba(255, 51, 102, 0.4);
}
.channels {
  flex: 1;
  overflow-y: auto;
  margin: 0 -8px;
  padding: 0 8px;
}
.channels::-webkit-scrollbar { width: 6px; }
.channels::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }
.channel {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.1s, border-color 0.1s;
  user-select: none;
}
.channel:hover { background: var(--panel-2); }
.channel.active {
  background: var(--active-bg);
  border-color: var(--accent);
}
.channel.dragging { opacity: 0.4; }
.channel.drag-over {
  background: var(--panel-2);
  border-color: var(--accent);
}
.channel .num {
  font-size: 11px;
  color: var(--muted);
  min-width: 22px;
  font-variant-numeric: tabular-nums;
}
.channel.active .num { color: var(--accent); }
.channel .name {
  flex: 1;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.channel .pool {
  background: none;
  border: none;
  color: var(--dim);
  cursor: pointer;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: inherit;
  line-height: 1;
}
.channel .pool:hover { color: var(--accent); }
.channel.active .pool { color: var(--muted); }
.channel .pool-edit {
  width: 50px;
  background: var(--input-bg);
  border: 1px solid var(--accent);
  color: var(--text);
  font-family: inherit;
  font-size: 11px;
  padding: 2px 4px;
  border-radius: 3px;
  outline: none;
  font-variant-numeric: tabular-nums;
}
.channel .remove {
  opacity: 0;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  padding: 0 4px;
  line-height: 1;
}
.channel .name-edit {
  flex: 1;
  min-width: 0;
  background: var(--input-bg);
  border: 1px solid var(--accent);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  padding: 2px 6px;
  border-radius: 3px;
  outline: none;
}
.channel:hover .remove { opacity: 1; }
.channel .remove:hover { color: var(--accent); }
.add-btn {
  margin-top: 8px;
  padding: 12px;
  background: transparent;
  border: 1px dashed var(--border-2);
  color: var(--muted);
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.1em;
  transition: border-color 0.1s, color 0.1s;
}
.add-btn:hover { border-color: var(--accent); color: var(--accent); }
.io-row {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}
.io-btn {
  flex: 1;
  padding: 8px;
  background: transparent;
  border: 1px dashed var(--border-2);
  color: var(--dim);
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.1em;
  transition: border-color 0.1s, color 0.1s;
}
.io-btn:hover { border-color: var(--accent); color: var(--accent); }
.io-status {
  margin-top: 6px;
  font-size: 10px;
  color: var(--dim);
  text-align: center;
  min-height: 14px;
  transition: color 0.1s;
}
.io-status.ok { color: var(--muted); }
.io-status.error { color: var(--accent); }
.hint {
  margin-top: 8px;
  font-size: 10px;
  color: var(--dim);
  text-align: center;
  line-height: 1.5;
}
/* Main */
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.topbar-left { display: flex; align-items: center; gap: 14px; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.ch-info { display: flex; align-items: baseline; gap: 16px; }
.sidebar-toggle {
  background: transparent;
  border: 1px solid var(--border-2);
  color: var(--muted);
  width: 28px;
  height: 28px;
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  line-height: 1;
  padding: 0;
  transition: border-color 0.1s, color 0.1s;
}
.sidebar-toggle:hover { border-color: var(--accent); color: var(--accent); }
.ch-num {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums;
}
.ch-name { font-size: 14px; }
.clock {
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.screen {
  flex: 1;
  background: #000;
  position: relative;
  overflow: hidden;
}
.screen iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}
.empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: var(--dim);
  text-align: center;
}
.empty .big { font-size: 56px; opacity: 0.4; }
.empty .label {
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--muted);
}
.empty .sub { font-size: 11px; color: var(--dim); }
/* Static effect */
.static {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background:
    repeating-linear-gradient(0deg,
      rgba(255,255,255,0.04) 0px,
      rgba(255,255,255,0.04) 1px,
      transparent 1px,
      transparent 3px),
    repeating-linear-gradient(90deg,
      rgba(255,255,255,0.02) 0px,
      rgba(255,255,255,0.02) 1px,
      transparent 1px,
      transparent 4px);
  transition: opacity 0.1s;
  z-index: 5;
}
.static.on { opacity: 1; }
/* Controls */
.controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 14px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.btn {
  background: var(--panel-2);
  border: 1px solid var(--border-2);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 0.1em;
  transition: all 0.1s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
/* Modal */
.modal-bg {
  position: fixed;
  inset: 0;
  background: var(--modal-overlay);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}
.modal-bg.show { display: flex; }
.modal {
  background: var(--panel);
  border: 1px solid var(--border-2);
  border-radius: 8px;
  padding: 24px;
  width: 480px;
  max-width: 90vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.modal h2 {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 0.2em;
  font-weight: 700;
}
.modal p {
  color: var(--muted);
  font-size: 12px;
  margin: 0 0 16px;
  line-height: 1.6;
}
.modal code {
  color: var(--text);
  background: var(--code-bg);
  padding: 1px 4px;
  border-radius: 2px;
  font-size: 11px;
}
.modal input {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border-2);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 4px;
  font-family: inherit;
  font-size: 13px;
  margin-bottom: 10px;
  transition: border-color 0.1s;
}
.modal input:focus {
  outline: none;
  border-color: var(--accent);
}
.modal .status {
  font-size: 11px;
  color: var(--muted);
  min-height: 16px;
  margin: 4px 0 12px;
}
.modal .status.error { color: var(--accent); }
.modal .status.working::after {
  content: '';
  display: inline-block;
  animation: dots 1.2s infinite;
}
@keyframes dots {
  0% { content: ''; } 25% { content: '.'; } 50% { content: '..'; } 75% { content: '...'; }
}
.modal .actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}
.modal .actions .btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.modal .actions .btn.primary:hover { background: #ff4d7a; }
/* Mobile */
@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .sidebar { order: 2; max-height: 40vh; }
}