.experiment-layout{gap:var(--space-lg);padding:calc(70px + var(--space-lg)) var(--space-lg) var(--space-lg);grid-template-columns:1fr 380px;max-width:1600px;min-height:100vh;margin:0 auto;display:grid}.sim-area{gap:var(--space-md);flex-direction:column;display:flex}.sim-header{align-items:center;gap:var(--space-md);grid-column:1/-1;display:flex}.sim-title{font-size:1.5rem;font-weight:700}.sim-badge{color:var(--accent-primary);background:#6366f11f;border:1px solid #6366f140;border-radius:999px;padding:2px 12px;font-size:.75rem;font-weight:500}.canvas-wrapper{border-radius:var(--radius-md);border:1px solid var(--bg-glass-border);background:radial-gradient(circle,#1a1f3a 0%,#0a0f1f 100%);flex:1;min-height:480px;position:relative;overflow:hidden}#atom-canvas{width:100%;height:100%;display:block}.canvas-toggle{top:var(--space-md);left:var(--space-md);color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:2;background:#0a0f1fb3;border:1px solid #ffffff14;padding:5px 12px;font-family:inherit;font-size:.78rem;transition:all .15s;position:absolute}.canvas-toggle:hover{color:var(--text-primary);border-color:#6366f180}.canvas-toggle[aria-pressed=true]{color:var(--text-primary);background:#6366f12e;border-color:#6366f18c}.legend{top:var(--space-md);right:var(--space-md);border-radius:var(--radius-sm);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0a0f1f99;border:1px solid #ffffff14;flex-direction:column;gap:6px;padding:10px 14px;display:flex;position:absolute}.legend-item{color:var(--text-secondary);align-items:center;gap:8px;font-size:.8rem;display:flex}.legend-dot{border-radius:50%;flex-shrink:0;width:12px;height:12px}.legend-dot--proton{background:radial-gradient(circle at 30% 30%,#ff9a9a,#c92e2e);box-shadow:0 0 6px #ff646499}.legend-dot--neutron{background:radial-gradient(circle at 30% 30%,#e2e3e8,#5e6473);box-shadow:0 0 6px #b4b4c880}.legend-dot--electron{background:#8ec0ff;box-shadow:0 0 6px #7eb6ff99}.controls-dashboard{gap:var(--space-md);display:flex}.dashboard-params{flex:3}.dashboard-actions{justify-content:center;gap:var(--space-sm);flex-direction:column;flex:1;display:flex}.action-hint{color:var(--text-muted);text-align:center;margin:0;font-size:.75rem}.palette-instruction{color:var(--text-secondary);margin:0 0 var(--space-md) 0;font-size:.85rem;line-height:1.6}.palette-instruction strong{color:var(--accent-primary);font-weight:600}.palette-bins{gap:var(--space-md);margin-bottom:var(--space-md);grid-template-columns:1fr 1fr;display:grid}.palette-bin{flex-direction:column;gap:8px;display:flex}.palette-chip{background:var(--bg-secondary);border:1px solid var(--bg-glass-border);border-radius:var(--radius-sm);cursor:grab;-webkit-user-select:none;user-select:none;touch-action:none;align-items:center;gap:12px;padding:14px;transition:transform .15s,box-shadow .15s,border-color .15s;display:flex}.palette-chip:hover{border-color:var(--accent-primary);transform:translateY(-2px);box-shadow:0 6px 16px #6366f147}.palette-chip:active{cursor:grabbing;transform:translateY(0)scale(.98)}.chip-orb{border-radius:50%;flex-shrink:0;width:32px;height:32px}.chip-orb--proton{background:radial-gradient(circle at 30% 30%,#ff9a9a,#c92e2e);box-shadow:0 0 14px #ff64648c}.chip-orb--electron{background:radial-gradient(circle at 30% 30%,#b8d4ff,#4a90e2);box-shadow:0 0 14px #7eb6ff8c}.chip-text{flex-direction:column;gap:2px;display:flex}.chip-name{color:var(--text-primary);font-size:.95rem;font-weight:600}.chip-sub{color:var(--text-muted);letter-spacing:.02em;font-family:Space Grotesk,sans-serif;font-size:.7rem}.bin-count{color:var(--text-secondary);text-align:center;background:var(--bg-card);border-radius:var(--radius-sm);padding:8px;font-size:.8rem}.bin-count span{color:var(--accent-primary);font-variant-numeric:tabular-nums;margin:0 2px;font-size:1rem;font-weight:700}.palette-tip{color:var(--text-secondary);border-radius:var(--radius-sm);background:#6366f114;border:1px dashed #6366f147;padding:10px 12px;font-size:.78rem;line-height:1.55}.drag-ghost{pointer-events:none;z-index:9999;opacity:.92;border-radius:50%;width:32px;height:32px;animation:1.2s ease-in-out infinite ghost-pulse;position:fixed;transform:translate(-50%,-50%)}.drag-ghost--proton{background:radial-gradient(circle at 30% 30%,#ff9a9a,#c92e2e);box-shadow:0 0 20px #ff6464b3}.drag-ghost--electron{background:radial-gradient(circle at 30% 30%,#b8d4ff,#4a90e2);box-shadow:0 0 20px #7eb6ffb3}@keyframes ghost-pulse{0%,to{transform:translate(-50%,-50%)scale(1)}50%{transform:translate(-50%,-50%)scale(1.12)}}.canvas-wrapper.drop-active{outline-offset:-8px;outline:2px dashed #6366f18c}body.dragging-particle{cursor:grabbing}.action-row{gap:var(--space-sm);display:flex}.btn{border-radius:var(--radius-sm);border:1px solid var(--bg-glass-border);background:var(--bg-card);color:var(--text-primary);cursor:pointer;flex:1;justify-content:center;align-items:center;gap:6px;padding:10px 16px;font-size:.9rem;font-weight:500;transition:all .15s;display:inline-flex}.btn:hover{background:var(--accent-primary);color:var(--bg-primary);border-color:var(--accent-primary)}.btn--secondary{background:var(--bg-secondary)}.btn-icon{font-size:1rem}.control-panel{gap:var(--space-md);flex-direction:column;display:flex}.panel-section{padding:var(--space-md);background:var(--bg-card);border:1px solid var(--bg-glass-border);border-radius:var(--radius-sm)}.panel-title{color:var(--text-secondary);margin:0 0 var(--space-sm) 0;text-transform:uppercase;letter-spacing:.05em;font-size:.9rem;font-weight:600}.result-headline{align-items:center;gap:var(--space-md);padding:var(--space-md);background:var(--bg-card);border:1px solid var(--bg-glass-border);border-radius:var(--radius-sm);display:flex}.result-symbol-block{flex-direction:column;align-items:center;gap:6px;display:flex}.result-symbol{color:var(--accent-primary);text-align:center;min-width:80px;font-family:Space Grotesk,Inter,sans-serif;font-size:2.8rem;font-weight:700;line-height:1}.result-ion-tag{text-transform:uppercase;letter-spacing:.05em;border-radius:999px;padding:2px 10px;font-size:.7rem;font-weight:600}.tag-neutral{color:#b8c0d8;background:#9696b433}.tag-cation{color:#ff8a8a;background:#ff8a8a2e}.tag-anion{color:#7eb6ff;background:#7eb6ff2e}.result-name{flex-direction:column;gap:2px;display:flex}.result-name-ko{color:var(--text-primary);font-size:1.4rem;font-weight:600}.result-name-en{color:var(--text-muted);font-family:Space Grotesk,sans-serif;font-size:.85rem}.mass-toggle{color:var(--text-muted);border:1px solid var(--bg-glass-border);border-radius:var(--radius-sm);cursor:pointer;background:0 0;align-self:flex-start;margin-top:8px;padding:3px 9px;font-family:inherit;font-size:.72rem;transition:all .15s}.mass-toggle:hover{color:var(--text-primary);border-color:var(--accent-primary)}.mass-toggle[aria-pressed=true]{background:var(--accent-primary);color:var(--bg-primary);border-color:var(--accent-primary)}.ion-warning{border-radius:var(--radius-sm);color:#ffdea5f5;background:#f5b4461f;border:1px solid #f5b44661;align-items:flex-start;gap:9px;padding:11px 13px;font-size:.8rem;line-height:1.55;display:flex}.ion-warning[hidden]{display:none}.ion-warning-icon{flex-shrink:0;font-size:1rem;line-height:1.4}.ion-warning-text{flex:1}.info-bar{gap:var(--space-sm);grid-template-columns:1fr 1fr;display:grid}.info-item{padding:var(--space-sm) var(--space-md);border-radius:var(--radius-sm);background:var(--bg-card);border:1px solid var(--bg-glass-border);flex-direction:column;align-items:center;gap:2px;display:flex}.info-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-size:.7rem}.info-value{color:var(--text-primary);font-variant-numeric:tabular-nums;font-size:1.1rem;font-weight:600}.config-list{color:var(--accent-primary);text-align:center;padding:var(--space-sm) 0;letter-spacing:.1em;font-family:Space Grotesk,sans-serif;font-size:1.5rem;font-weight:600}.config-hint{color:var(--text-muted);text-align:center;margin-top:4px;font-size:.7rem}.description-text{color:var(--text-secondary);margin:0;font-size:.85rem;line-height:1.6}.rule-list{color:var(--text-secondary);margin:0;padding-left:18px;font-size:.8rem;line-height:1.6}.rule-list li{margin-bottom:6px}.rule-list strong{color:var(--accent-primary);font-weight:600}@media (width<=1024px){.experiment-layout{grid-template-columns:1fr}.canvas-wrapper{min-height:400px}}@media (width<=640px){.controls-dashboard{flex-direction:column}.result-headline{text-align:center;flex-direction:column}.canvas-wrapper{min-height:320px}}