:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel-2: #fafbfd;
  --border: #e6e8ef;
  --border-strong: #d4d7e0;
  --text: #1a1d29;
  --text-mute: #6b7280;
  --text-sub: #98a0ad;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --danger: #e11d48;
  --shadow: 0 1px 2px rgba(20, 22, 30, 0.04), 0 8px 24px rgba(20, 22, 30, 0.06);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
}

body { display: flex; flex-direction: column; overflow: hidden; }

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand h1 {
  font-size: 16px;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.04em;
}
.brand-sub { font-size: 11px; color: var(--text-sub); }
.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.4);
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
}

.tool {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-mute);
}
.tool select {
  font-size: 12px;
  padding: 6px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
}
.tool.color input[type=color] {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}

.divider { width: 1px; height: 22px; background: var(--border); margin: 0 4px; }

.btn {
  font: inherit;
  padding: 7px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  transition: background .12s, border-color .12s, transform .12s;
}
.btn:hover { background: var(--panel-2); }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn.primary:hover { background: #4338ca; }
.btn.ghost { background: transparent; }

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 240px 1fr 280px;
  gap: 0;
  min-height: 0;
}

.layers-panel, .props-panel {
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.props-panel { border-right: none; border-left: 1px solid var(--border); }

.panel-head {
  padding: 14px 16px 10px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}
.panel-head h2 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin: 0;
}
.hint { font-size: 11px; color: var(--text-sub); }

.layers-list {
  list-style: none;
  margin: 0;
  padding: 8px;
  overflow-y: auto;
  flex: 1;
}
.layer-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  margin-bottom: 4px;
  background: var(--panel-2);
  user-select: none;
}
.layer-item:hover { background: #f1f2f7; }
.layer-item.selected {
  background: var(--accent-soft);
  border-color: #c7c9ff;
}
.layer-item .grab {
  color: var(--text-sub);
  cursor: grab;
  font-size: 14px;
  line-height: 1;
}
.layer-item .thumb {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background: #e9ebf2;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-mute);
  flex-shrink: 0;
}
.layer-item .name {
  flex: 1;
  font-size: 12px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.layer-item .toggle {
  border: none;
  background: transparent;
  cursor: pointer;
  width: 22px;
  height: 22px;
  border-radius: 4px;
  color: var(--text-mute);
  font-size: 13px;
}
.layer-item .toggle:hover { background: #fff; color: var(--text); }
.layer-item.hidden .name { color: var(--text-sub); text-decoration: line-through; }
.layer-item.locked { opacity: 0.85; }

.layer-item.dragging { opacity: 0.5; }
.layer-item.drop-target { border-color: var(--accent); }

.stage-wrap {
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: auto;
  min-height: 0;
}

.stage-frame {
  background:
    repeating-conic-gradient(#eef0f5 0% 25%, #fff 0% 50%) 50% / 16px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

#stage-container {
  display: block;
}

.stage-meta {
  position: absolute;
  top: 12px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-mute);
  background: rgba(255,255,255,0.85);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.stage-meta .dot {
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--text-sub);
}

.props-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
}
.props-body .empty {
  color: var(--text-sub);
  text-align: center;
  margin-top: 24px;
  font-size: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}
.field label {
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.02em;
}
.field input[type=text],
.field input[type=number],
.field textarea,
.field select {
  font: inherit;
  padding: 6px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  background: #fff;
  color: var(--text);
  width: 100%;
}
.field textarea { resize: vertical; min-height: 60px; }
.field input[type=color] {
  width: 36px; height: 28px; padding: 0;
  border: 1px solid var(--border-strong); border-radius: 5px; background: #fff;
}
.field input[type=range] { width: 100%; }
.field.row { flex-direction: row; align-items: center; }
.field.row label { width: 70px; flex-shrink: 0; }
.field-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}
.field-group .field { margin-bottom: 0; }

.section-title {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-mute);
  margin: 16px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px dashed var(--border);
}
.section-title:first-child { margin-top: 0; }