html, body {
  margin: 0;
  padding: 0;
  background: transparent;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

body.bg-checker {
  background-color: #2a2a2a;
  background-image:
    linear-gradient(45deg, #555 25%, transparent 25%),
    linear-gradient(-45deg, #555 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #555 75%),
    linear-gradient(-45deg, transparent 75%, #555 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, 12px 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
}

#avatar {
  max-width: 100%;
  max-height: 100vh;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  image-rendering: -webkit-optimize-contrast;
  transform-origin: 50% 100%;
  will-change: transform;
}

#avatar:not([src]) {
  visibility: hidden;
}

/* ===== Panel ===== */
#panel {
  position: fixed;
  top: 10px;
  left: 10px;
  width: 360px;
  max-height: calc(100vh - 20px);
  background: rgba(15, 15, 18, 0.92);
  color: #eee;
  font-family: "Yu Gothic UI", "Meiryo", sans-serif;
  font-size: 12px;
  line-height: 1.5;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  z-index: 10;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#panel.hidden {
  display: none;
}

#panel-header {
  padding: 10px 14px;
  background: rgba(255,255,255,0.04);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

#panel-toggle {
  cursor: pointer;
  font-size: 11px;
  color: #aaa;
}

#panel-toggle:hover {
  color: #fff;
}

#panel-status {
  padding: 8px 14px;
  background: rgba(0,0,0,0.18);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

#panel-status button {
  margin: 0;
}

.status-mic-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.status-mic-row #debug {
  flex: 1;
  margin-top: 0;
  min-width: 0;
}

.status-meter-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-meter-row .status-label {
  flex: 0 0 auto;
  font-size: 11px;
  color: #aaa;
}

.status-meter-row #volMeter {
  flex: 1;
  margin-top: 0;
}

.status-meter-row #volText {
  flex: 0 0 36px;
  text-align: right;
  font-family: monospace;
  color: #ddd;
  font-size: 11px;
}

#panel-tabs {
  display: flex;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.2);
}

.tab {
  flex: 1;
  padding: 8px 4px;
  background: transparent;
  border: none;
  color: #999;
  cursor: pointer;
  font-size: 12px;
  border-bottom: 2px solid transparent;
}

.tab:hover { color: #ddd; }

.tab.active {
  color: #fff;
  border-bottom-color: #5af;
  background: rgba(90, 170, 255, 0.08);
}

#panel-body {
  padding: 12px 14px;
  overflow-y: auto;
  flex: 1;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

#panel-body h3 {
  font-size: 12px;
  margin: 16px 0 8px;
  color: #5af;
  border-bottom: 1px dashed rgba(255,255,255,0.15);
  padding-bottom: 3px;
}

#panel-body h3:first-child { margin-top: 0; }

.hint {
  margin: 6px 0 10px;
  color: #888;
  font-size: 11px;
  line-height: 1.5;
}

.image-tips {
  background: rgba(90, 170, 255, 0.08);
  border: 1px solid rgba(90, 170, 255, 0.25);
  border-radius: 4px;
  padding: 8px 10px;
  margin-bottom: 12px;
  color: #cce4ff;
  font-size: 11px;
  line-height: 1.7;
}

.image-tips strong { color: #fff; }

.hint strong.warn {
  color: #ffb84d;
  font-weight: 700;
}

.hint code {
  background: rgba(255,255,255,0.08);
  padding: 1px 5px;
  border-radius: 3px;
}

/* Generic row layout for label + control + value */
.row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
}

.row label {
  flex: 0 0 110px;
  font-size: 11px;
  color: #bbb;
}

.row input[type=range] {
  flex: 1;
  min-width: 60px;
}

.row select,
.row input[type=number],
.row input[type=text] {
  flex: 1;
  background: rgba(255,255,255,0.06);
  color: #eee;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  padding: 3px 6px;
  font-size: 11px;
}

/* Dropdown option styling (browser default is light-on-light otherwise) */
#panel select option {
  background: #1a1a1a;
  color: #eee;
}

.row .val {
  flex: 0 0 50px;
  text-align: right;
  font-family: monospace;
  color: #ddd;
  font-size: 11px;
}

.row input[type=number].val {
  flex: 0 0 60px;
  background: rgba(255,255,255,0.08);
  color: #eee;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  padding: 2px 4px;
  text-align: right;
  font-family: monospace;
  font-size: 11px;
}

.row input[type=number].val:focus {
  outline: 1px solid #5af;
  background: rgba(255,255,255,0.12);
}

.row input[type=color] {
  flex: 0 0 60px;
  height: 26px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  cursor: pointer;
  padding: 2px;
}

/* Volume meter */
#volMeter {
  width: 100%;
  height: 8px;
  background: #333;
  margin-top: 6px;
  border-radius: 4px;
  overflow: hidden;
}

#volBar {
  height: 100%;
  background: linear-gradient(to right, #4f4, #ff4, #f44);
  width: 0;
  transition: width 0.05s linear;
}

/* Buttons */
button {
  background: rgba(255,255,255,0.08);
  color: #eee;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 4px;
  padding: 5px 10px;
  cursor: pointer;
  font-size: 11px;
  margin-right: 4px;
  margin-top: 4px;
}

button:hover { background: rgba(255,255,255,0.16); }
button.primary { background: rgba(90,170,255,0.25); border-color: rgba(90,170,255,0.5); }
button.primary:hover { background: rgba(90,170,255,0.4); }
button.danger { background: rgba(220,80,80,0.25); border-color: rgba(220,80,80,0.5); }

/* Custom expression card */
.expression-card {
  background: rgba(255,255,255,0.04);
  padding: 8px;
  border-radius: 4px;
  margin: 6px 0;
  display: flex;
  align-items: stretch;
  gap: 8px;
}

.expression-card .thumb {
  width: 48px;
  height: 48px;
  background: #222;
  border-radius: 3px;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  flex-shrink: 0;
  cursor: pointer;
}

.expression-card .thumb.empty::before {
  content: '+';
  color: #666;
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.expression-card .body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.expression-card .exp-label {
  background: rgba(255,255,255,0.06);
  color: #eee;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  padding: 3px 6px;
  font-size: 11px;
}

.expression-card .hotkey-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.expression-card .hotkey-btn {
  min-width: 44px;
  padding: 3px 8px;
  font-family: monospace;
  font-size: 11px;
  margin: 0;
}

.expression-card .hotkey-btn.capturing {
  background: #fbb;
  color: #000;
  border-color: #f88;
}

.expression-card .record-btn {
  padding: 2px 8px;
  font-size: 11px;
  margin: 0;
}

.expression-card .record-btn.recording {
  background: #d33;
  color: #fff;
  border-color: #f55;
  animation: recordPulse 0.8s ease-in-out infinite;
}

@keyframes recordPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.expression-card .anim-select {
  flex: 1;
  min-width: 0;
  background: rgba(255,255,255,0.06);
  color: #eee;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  padding: 2px 4px;
  font-size: 11px;
}

.expression-card .remove-exp {
  align-self: flex-start;
  padding: 2px 8px;
  font-size: 10px;
  margin: 0;
}

/* Image slot */
.image-slot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
  padding: 6px;
  background: rgba(255,255,255,0.04);
  border-radius: 4px;
}

.image-slot .thumb {
  width: 36px;
  height: 36px;
  background: #222;
  border-radius: 3px;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  flex-shrink: 0;
  cursor: pointer;
}

.image-slot .thumb.empty::before {
  content: '+';
  color: #666;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.image-slot .label-area {
  flex: 1;
  min-width: 0;
}

.image-slot .slot-name {
  font-size: 11px;
  color: #ddd;
  font-weight: 600;
}

.image-slot .filename {
  font-size: 10px;
  color: #888;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.image-slot .actions button {
  padding: 2px 6px;
  font-size: 10px;
  margin: 0 0 0 4px;
}

/* Mouth tier card */
.mouth-tier {
  background: rgba(255,255,255,0.04);
  padding: 8px;
  border-radius: 4px;
  margin: 6px 0;
}

.mouth-tier-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
  flex-wrap: nowrap;
}

.mouth-tier-header label {
  flex: 0 0 auto;
  font-size: 11px;
  color: #bbb;
  white-space: nowrap;
}

.mouth-tier-header input[type=range] {
  flex: 1 1 0;
  min-width: 40px;
}

.mouth-tier-header .val {
  flex: 0 0 36px;
  text-align: right;
  font-family: monospace;
  color: #ddd;
  font-size: 11px;
}

.mouth-tier-header input[type=number].val {
  flex: 0 0 44px;
  background: rgba(255,255,255,0.08);
  color: #eee;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  padding: 1px 3px;
  min-width: 0;
}

.mouth-tier-header input[type=number].val:focus {
  outline: 1px solid #5af;
  background: rgba(255,255,255,0.12);
}

.mouth-tier-header .remove-tier {
  flex: 0 0 auto;
  padding: 2px 6px;
  font-size: 10px;
}

.mouth-tier-images {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.mouth-tier-images .img-thumb {
  width: 40px;
  height: 40px;
  background: #222;
  border-radius: 3px;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  cursor: pointer;
}

.mouth-tier-images .img-thumb .remove {
  position: absolute;
  top: -4px;
  right: -4px;
  background: #c44;
  color: white;
  border-radius: 50%;
  width: 14px;
  height: 14px;
  font-size: 9px;
  line-height: 14px;
  text-align: center;
  cursor: pointer;
}

.mouth-tier-images .add-img {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.04);
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #666;
  font-size: 22px;
  cursor: pointer;
}

#debug {
  margin-top: 6px;
  padding: 4px 6px;
  background: rgba(0,0,0,0.4);
  color: #6f6;
  font-size: 10px;
  word-break: break-all;
  border-radius: 3px;
  min-height: 14px;
  line-height: 1.4;
}

#debug.error { color: #f66; }

/* Scrollbar (webkit only) */
#panel-body::-webkit-scrollbar { width: 8px; }
#panel-body::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }
#panel-body::-webkit-scrollbar-track { background: transparent; }