*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#0984E3;--primary-light:#74B9FF;--accent:#6C5CE7;
  --bg:#0B0E11;--bg-card:rgba(20,24,32,0.85);
  --bg-input:rgba(15,18,25,0.8);--text:#E8E6F0;--text-dim:#8B8AA0;
  --text-muted:#5A5872;--border:rgba(9,132,227,0.15);
  --success:#00B894;--danger:#FF6B6B;--warning:#FDCB6E;
  --radius:12px;--radius-sm:8px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;
  --mono:'JetBrains Mono','SFMono-Regular','Consolas',monospace;
  --transition:250ms ease;--glass-bg:rgba(20,24,32,0.6);--glass-border:rgba(255,255,255,0.06)
}
html{font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 20% 15%,rgba(9,132,227,0.07) 0%,transparent 50%),radial-gradient(ellipse at 80% 80%,rgba(108,92,231,0.04) 0%,transparent 50%);pointer-events:none;z-index:0}
.app{position:relative;z-index:1;max-width:900px;margin:0 auto}
.header{padding:1rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem}
.header-brand{display:flex;align-items:center;gap:.75rem}
.header-brand h1{font-size:1.05rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{font-size:.78rem;color:var(--text-dim)}
.badge{font-size:.72rem;padding:.2rem .55rem;border-radius:99px;background:rgba(9,132,227,0.15);color:var(--primary-light);font-weight:600}
.main{padding:1.5rem}
.glass-card{background:var(--glass-bg);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1.25rem}
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.75rem;flex-wrap:wrap;gap:.5rem}
.section-title{font-size:.9rem;font-weight:700;color:var(--primary-light);margin-bottom:0}
.mode-tabs{display:flex;gap:.25rem;margin-bottom:1.25rem;background:var(--glass-bg);border-radius:var(--radius);padding:.25rem;border:1px solid var(--glass-border)}
.mode-tab{flex:1;padding:.5rem;background:transparent;border:none;border-radius:var(--radius-sm);color:var(--text-dim);font-size:.82rem;font-weight:600;cursor:pointer;transition:all var(--transition);font-family:var(--font)}
.mode-tab:hover{color:var(--text);background:rgba(9,132,227,0.08)}
.mode-tab.active{background:rgba(9,132,227,0.2);color:var(--primary-light)}
.label-manager{padding:1rem}
.label-actions{display:flex;gap:.25rem;align-items:center}
.label-list{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:.5rem}
.label-chip{display:inline-flex;align-items:center;gap:.25rem;padding:.25rem .55rem;border-radius:99px;font-size:.75rem;font-weight:600;cursor:pointer;transition:all 150ms;border:1px solid transparent}
.label-chip:hover{filter:brightness(1.2)}
.label-chip.selected{border-color:white;box-shadow:0 0 8px rgba(255,255,255,0.2)}
.label-chip .remove-label{font-size:.65rem;opacity:.6;cursor:pointer}
.label-chip .remove-label:hover{opacity:1}
.input{padding:.4rem .55rem;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.82rem;font-family:var(--font)}
.input:focus{outline:none;border-color:var(--primary)}
.input-sm{padding:.3rem .4rem;font-size:.78rem}
.textarea{width:100%;padding:.6rem;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.82rem;font-family:var(--font);resize:vertical;margin-bottom:.5rem}
.textarea:focus{outline:none;border-color:var(--primary)}
.canvas-wrap{position:relative;background:#111;border-radius:var(--radius-sm);overflow:hidden;margin-bottom:.5rem}
.canvas-wrap canvas{display:block;width:100%;cursor:crosshair}
.bbox-list{display:flex;flex-direction:column;gap:.25rem}
.bbox-item{display:flex;align-items:center;justify-content:space-between;padding:.3rem .5rem;background:rgba(255,255,255,0.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm);font-size:.78rem;font-family:var(--mono)}
.text-items{display:flex;flex-direction:column;gap:.5rem;margin-top:.5rem}
.text-item{padding:.6rem;background:rgba(255,255,255,0.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm)}
.text-item-text{font-size:.82rem;margin-bottom:.3rem;color:var(--text-dim)}
.text-item-label{font-size:.72rem;font-weight:700;color:var(--primary-light)}
.ner-display{padding:.6rem;background:rgba(255,255,255,0.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm);min-height:60px;margin-bottom:.5rem;line-height:1.8;font-size:.85rem}
.ner-tag{padding:.1rem .35rem;border-radius:4px;font-weight:600;cursor:default}
.ner-entities{display:flex;flex-direction:column;gap:.2rem}
.ner-entity{font-size:.78rem;font-family:var(--mono);color:var(--text-dim)}
.export-btns{display:flex;gap:.3rem;flex-wrap:wrap}
.del-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:.82rem;padding:.1rem .3rem;border-radius:4px}
.del-btn:hover{color:var(--danger);background:rgba(255,107,107,0.1)}
.btn{display:inline-flex;align-items:center;gap:.25rem;padding:.4rem .75rem;border:none;border-radius:var(--radius-sm);font-size:.78rem;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--transition)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff}
.btn-primary:hover{transform:translateY(-1px)}
.btn-accent{background:rgba(108,92,231,0.15);color:var(--accent);border:1px solid rgba(108,92,231,0.2)}
.btn-accent:hover{background:rgba(108,92,231,0.25)}
.btn-ghost{background:transparent;color:var(--text-dim)}
.btn-ghost:hover{color:var(--text);background:rgba(255,255,255,0.05)}
.btn-sm{font-size:.75rem;padding:.3rem .5rem}
.full-width{width:100%}
.hidden{display:none !important}
.hint{color:var(--text-muted);font-size:.82rem;padding:2rem;text-align:center}
.footer{padding:1rem 1.5rem;text-align:center;font-size:.78rem;color:var(--text-muted);border-top:1px solid var(--border)}
.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:200;display:flex;flex-direction:column;gap:.5rem}
.toast{background:var(--bg-card);border:1px solid var(--border);border-left:3px solid var(--accent);backdrop-filter:blur(20px);border-radius:var(--radius-sm);padding:.75rem 1rem;font-size:.82rem;color:var(--text);box-shadow:0 8px 40px rgba(0,0,0,0.4);animation:slideIn 300ms ease;max-width:320px}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(9,132,227,0.3);border-radius:3px}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
@media(max-width:640px){.mode-tabs{flex-direction:column}.label-actions{flex-direction:column;align-items:stretch}}