*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
.hidden { display: none; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: row;
}



.speakers-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  font-family: var(--font-mono);
  font-size: var(--fs-body);
  color: var(--muted);
  letter-spacing: 0.06em;
  opacity: 0.5;
}

/* Speaker blocks */
.speaker-block {
  margin-bottom: 1.5rem;
}

.speaker-label {
  font-family: var(--font-mono);
  font-size: var(--fs-secondary);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 0.5rem;
  padding: 0.2rem 0;
}

.header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-shrink: 0;
}

.header h1 {
  font-family: var(--font-mono);
  font-size: var(--fs-title-lg);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
}

.header span {
  font-family: var(--font-mono);
  font-size: var(--fs-body);
  color: var(--muted);
  letter-spacing: 0.1em;
}

.player-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}


/* region ── Resize handles ─────────────────────────────────────────────────── */
.resize-handle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 20;
}

/* Sits in the left-col flex column — spans the 1.5rem gap */
.resize-handle-h {
  height: 1.5rem;
  cursor: row-resize;
  align-self: stretch;
  margin: -1.5rem 0;  /* overlap the gap without consuming extra space */
}

/* Sits in the main-layout flex row — spans the 1.5rem gap */
.resize-handle-v {
  width: 1.5rem;
  cursor: col-resize;
  align-self: stretch;
  margin: 0 -1.5rem;
}

.resize-handle::after {
  content: '';
  border-radius: 2px;
  background: var(--accent2);
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

.resize-handle-h::after {
  width: 48px;
  height: 3px;
}

.resize-handle-v::after {
  width: 3px;
  height: 48px;
}

.resize-handle:hover::after,
.resize-handle.dragging::after {
  opacity: 0.7;
}
/* endregion */

.btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn:active { background: var(--accent-subtle); }

.btn-sm { padding: 0.4rem 0.65rem; height: 30px; }

.btn-active {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  background: var(--accent-subtle);
}

.spacer { flex: 1; }

input[type="range"] {
  -webkit-appearance: none;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
  width: 80px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

/* Drop zone collapses after load */
.drop-zone.collapsed {
  display: none;
}


/* Loading overlay */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.3s ease;
}
#loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
#loading-overlay .loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
#loading-overlay .app-name {
  font-family: var(--font-mono);
  font-size: var(--fs-icon);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text);
  opacity: 0.8;
  margin-bottom: 8px;
}
#loading-overlay .spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--muted);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
#loading-overlay .label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  opacity: 0.7;
  letter-spacing: 0.05em;
}
@keyframes spin { to { transform: rotate(360deg); } }