:root{
  --bg:#15161c;
  --panel:#1d1f28;
  --panel-2:#242631;
  --line:#33364630;
  --line-strong:#3a3d4d;
  --text:#eceef5;
  --text-dim:#9a9dae;
  --accent:#7c8cff;
  --accent-2:#ff6b9d;
  --danger:#ff5470;
  --ok:#4ade80;
  font-family:'Segoe UI','Hiragino Sans','Noto Sans JP',sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-size:14px;}
h2{font-size:13px;letter-spacing:.04em;color:var(--text-dim);margin:0 0 10px;font-weight:600;text-transform:none;}
button{font-family:inherit;cursor:pointer;}
select,input[type=text],input[type=number]{font-family:inherit;background:var(--panel-2);color:var(--text);border:1px solid var(--line-strong);border-radius:6px;padding:6px 8px;}
textarea{font-family:inherit;background:var(--panel-2);color:var(--text);border:1px solid var(--line-strong);border-radius:6px;padding:6px 8px;resize:vertical;}

.app-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 20px;background:var(--panel);border-bottom:1px solid var(--line-strong);
}
.brand{font-weight:700;font-size:16px;letter-spacing:.02em;}
.status-row{display:flex;gap:8px;}
.status-pill{
  font-size:11px;padding:4px 10px;border-radius:999px;background:var(--panel-2);
  border:1px solid var(--line-strong);color:var(--text-dim);
}
.status-pill.ready{color:var(--ok);border-color:var(--ok);}
.status-pill.error{color:var(--danger);border-color:var(--danger);}
.header-actions{display:flex;gap:6px;}
.icon-btn.small{width:28px;height:28px;font-size:12px;}
.icon-btn:disabled{opacity:.35;cursor:not-allowed;}

.project-row{display:flex;gap:6px;margin-bottom:8px;align-items:center;}
.project-row input[type=text],.project-row select{flex:1;min-width:0;font-size:12px;padding:6px 8px;}
.secondary-btn.small{width:auto;padding:6px 10px;margin:0;white-space:nowrap;}

.shortcut-hint{font-size:10.5px;color:var(--text-dim);margin:6px 4px 0;line-height:1.6;}

.subhead{font-size:12px;color:var(--text);margin:16px 0 8px;font-weight:700;}
.subhead:first-of-type{margin-top:0;}
.sfx-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:8px;}
.sfx-grid button{
  background:var(--panel-2);color:var(--text);border:1px solid var(--line-strong);
  border-radius:8px;padding:9px 6px;font-size:11.5px;font-weight:600;
}
.sfx-grid button:hover{border-color:var(--accent);}
.sfx-grid button:disabled{opacity:.5;}
.item-card label.inline-check{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--text-dim);}

.track-viz{
  position:relative;background:var(--panel-2);border:1px solid var(--line-strong);
  border-radius:8px;padding:6px 4px;margin-bottom:10px;min-height:8px;
}
.track-row{position:relative;height:22px;margin-bottom:4px;}
.track-row:last-child{margin-bottom:0;}
.track-bar{
  position:absolute;top:0;height:100%;background:var(--accent);border-radius:4px;
  color:#fff;font-size:10px;line-height:22px;padding:0 6px;overflow:hidden;white-space:nowrap;
  cursor:pointer;opacity:.85;
}
.track-bar:hover{opacity:1;}
.track-bar.selected{background:var(--accent-2);opacity:1;}
.track-playhead{
  position:absolute;top:0;bottom:0;width:2px;background:#fff;pointer-events:none;
  box-shadow:0 0 4px rgba(255,255,255,.8);
}

.layout{
  display:grid;
  grid-template-columns:260px minmax(0,1fr) 320px;
  gap:12px;padding:12px;
  min-height:calc(100vh - 53px);
}
@media (max-width:1000px){
  .layout{grid-template-columns:1fr;}
}

.panel{display:flex;flex-direction:column;gap:12px;min-width:0;}
.box{
  background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;
  padding:14px;
}

.file-btn{
  display:block;text-align:center;background:var(--accent);color:#fff;
  padding:9px 12px;border-radius:8px;font-size:12.5px;font-weight:600;
  margin-bottom:10px;
}
.file-btn.secondary{background:var(--panel-2);color:var(--text);border:1px solid var(--line-strong);}
.file-btn:hover{filter:brightness(1.08);}

.media-list{display:flex;flex-direction:column;gap:8px;max-height:260px;overflow-y:auto;}
.media-card{
  display:flex;gap:8px;align-items:center;background:var(--panel-2);
  border:1px solid var(--line-strong);border-radius:8px;padding:6px;
}
.media-card img,.media-card .thumb-fallback{
  width:52px;height:52px;object-fit:cover;border-radius:6px;background:#000;flex:none;
  display:flex;align-items:center;justify-content:center;color:var(--text-dim);font-size:10px;
}
.media-card .meta{flex:1;min-width:0;}
.media-card .meta .name{font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.media-card .meta .dur{font-size:11px;color:var(--text-dim);}
.media-card .add-btn{
  background:var(--accent);color:#fff;border:none;border-radius:6px;padding:6px 8px;font-size:11px;font-weight:600;
}

.center{display:flex;flex-direction:column;gap:12px;min-width:0;}
.preview-wrap{display:flex;justify-content:center;background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;padding:12px;}
.preview-stage{
  position:relative;width:100%;max-width:340px;aspect-ratio:9/16;
  background:#000;border-radius:8px;overflow:hidden;
}
.preview-stage video{width:100%;height:100%;object-fit:contain;background:#000;}
.overlay-layer,.caption-layer{position:absolute;inset:0;pointer-events:none;}
.overlay-box{
  position:absolute;border:1px dashed rgba(255,255,255,.5);
  pointer-events:auto;cursor:move;
}
.overlay-box img,.overlay-box video{width:100%;height:100%;object-fit:contain;display:block;}
.overlay-box .resize-handle{
  position:absolute;right:-6px;bottom:-6px;width:12px;height:12px;
  background:var(--accent);border-radius:3px;cursor:nwse-resize;
}
.caption-item{
  position:absolute;left:0;right:0;text-align:center;
  font-weight:700;white-space:pre-line;line-height:1.3;
  padding:0 6%;
}

.transport{display:flex;align-items:center;gap:10px;padding:0 4px;}
.icon-btn{background:var(--panel-2);border:1px solid var(--line-strong);color:var(--text);border-radius:8px;width:34px;height:34px;}
.transport input[type=range]{flex:1;}
.time-label{font-size:11px;color:var(--text-dim);white-space:nowrap;}

.timeline-box .hint{font-size:11px;color:var(--text-dim);margin:0 0 10px;}
.transition-row{display:flex;gap:16px;margin-bottom:10px;}
.transition-row label{display:flex;flex-direction:column;gap:4px;font-size:11px;color:var(--text-dim);}
.transition-row select,.transition-row input{font-size:12px;padding:5px 7px;}
.transition-row input[type=number]{width:70px;}
.sequence-list{display:flex;flex-direction:column;gap:8px;}
.seq-item{
  display:grid;grid-template-columns:56px 1fr auto;gap:10px;align-items:center;
  background:var(--panel-2);border:1px solid var(--line-strong);border-radius:8px;padding:8px;
  cursor:pointer;
}
.seq-item.selected{border-color:var(--accent);}
.seq-item img{width:56px;height:56px;object-fit:cover;border-radius:6px;background:#000;}
.seq-item .name{font-size:12px;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.seq-item .trims{display:flex;gap:6px;align-items:center;font-size:11px;color:var(--text-dim);flex-wrap:wrap;}
.seq-item .trims input{width:64px;padding:3px 5px;font-size:11px;}
.seq-item .actions{display:flex;flex-direction:column;gap:4px;}
.seq-item .actions button{
  background:transparent;border:1px solid var(--line-strong);color:var(--text-dim);
  border-radius:6px;width:26px;height:22px;font-size:11px;
}
.seq-item .actions button:hover{color:var(--text);}
.empty-hint{font-size:12px;color:var(--text-dim);text-align:center;padding:20px 0;}

.tabs{display:flex;gap:4px;background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;padding:4px;}
.tab-btn{
  flex:1;background:transparent;border:none;color:var(--text-dim);font-size:11.5px;
  padding:8px 4px;border-radius:7px;font-weight:600;
}
.tab-btn.active{background:var(--accent);color:#fff;}
.tab-panel{background:var(--panel);border:1px solid var(--line-strong);border-radius:10px;padding:14px;flex:1;overflow-y:auto;}
.tab-panel.hidden{display:none;}

.field-row{margin-bottom:12px;}
.field-row label{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--text-dim);}
.field-row select{width:100%;}
.small-hint{font-size:11px;color:var(--text-dim);line-height:1.6;}

.primary-btn{
  width:100%;background:var(--accent);color:#fff;border:none;border-radius:8px;
  padding:11px;font-size:13px;font-weight:700;margin-bottom:10px;
}
.primary-btn:disabled{opacity:.5;cursor:not-allowed;}
.secondary-btn{
  width:100%;background:var(--panel-2);color:var(--text);border:1px solid var(--line-strong);
  border-radius:8px;padding:9px;font-size:12px;font-weight:600;margin-bottom:10px;
}

.progress-text{font-size:11px;color:var(--text-dim);white-space:pre-wrap;margin-bottom:10px;min-height:14px;}

.item-list{display:flex;flex-direction:column;gap:10px;}
.item-card{
  background:var(--panel-2);border:1px solid var(--line-strong);border-radius:8px;padding:10px;
}
.item-card.selected{border-color:var(--accent);}
.item-card .row{display:flex;gap:8px;align-items:center;margin-bottom:6px;}
.item-card .row:last-child{margin-bottom:0;}
.item-card label.inline{display:flex;flex-direction:column;gap:3px;font-size:10.5px;color:var(--text-dim);flex:1;}
.item-card input[type=number]{width:100%;}
.item-card select{width:100%;}
.item-card textarea{width:100%;min-height:44px;font-size:12px;}
.item-card .remove-btn{
  background:transparent;border:1px solid var(--danger);color:var(--danger);
  border-radius:6px;padding:4px 8px;font-size:11px;margin-left:auto;
}
.item-card input[type=range]{flex:1;}
.item-card .rangeval{font-size:11px;color:var(--text-dim);width:40px;text-align:right;}

.color-editor .slider-row{margin-bottom:14px;}
.color-editor .slider-row .label-row{display:flex;justify-content:space-between;font-size:11.5px;color:var(--text-dim);margin-bottom:4px;}
.color-editor input[type=range]{width:100%;}
.color-editor .reset-btn{
  background:transparent;border:1px solid var(--line-strong);color:var(--text-dim);
  border-radius:6px;padding:6px 10px;font-size:11px;
}

#exportResult video{width:100%;border-radius:8px;margin-bottom:8px;}
#exportResult a{
  display:block;text-align:center;background:var(--ok);color:#0a2e17;font-weight:700;
  border-radius:8px;padding:9px;text-decoration:none;font-size:12.5px;
}