:root{--c-primary:#3B82F6;--c-accent:#10B981;--c-bg:#0F172A;--c-surface:#1E293B;--c-surface-2:#334155;--c-border:#475569;--c-text:#F1F5F9;--c-text-dim:#94A3B8;--c-text-muted:#64748B;--c-primary-dim:rgba(59,130,246,0.1);--c-accent-dim:rgba(16,185,129,0.1);--c-danger:#EF4444;--radius:12px;--radius-sm:8px;--radius-xs:6px;--font-sans:'Inter',system-ui,sans-serif;--font-mono:'JetBrains Mono',monospace;--transition:200ms ease;--shadow:0 4px 24px rgba(0,0,0,0.5)}
[data-theme=light]{--c-bg:#F8FAFC;--c-surface:#FFFFFF;--c-surface-2:#F1F5F9;--c-border:#E2E8F0;--c-text:#1E293B;--c-text-dim:#475569;--c-text-muted:#94A3B8;--shadow:0 4px 16px rgba(0,0,0,0.08)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--c-bg);color:var(--c-text);line-height:1.6;min-height:100vh;transition:background var(--transition),color var(--transition)}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--c-border);border-radius:3px}
::selection{background:var(--c-primary-dim);color:var(--c-primary)}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
#app-header{position:sticky;top:0;z-index:100;background:rgba(15,23,42,0.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--c-border);transition:background var(--transition)}
[data-theme=light] #app-header{background:rgba(255,255,255,0.85)}
.header-inner{max-width:1000px;margin:0 auto;padding:0.75rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.logo-group{display:flex;align-items:center;gap:0.6rem}
.logo-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);background:var(--c-primary-dim);color:var(--c-primary)}
h1{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.btn{display:inline-flex;align-items:center;gap:0.35rem;padding:0.45rem 0.9rem;font-size:0.8125rem;font-weight:500;font-family:var(--font-sans);border:none;border-radius:var(--radius-xs);cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn:disabled{opacity:0.4;cursor:not-allowed}
.btn-primary{background:linear-gradient(135deg,var(--c-primary),#2563EB);color:#fff;font-weight:600}
.btn-primary:hover:not(:disabled){filter:brightness(1.1);transform:translateY(-1px);box-shadow:0 3px 12px rgba(59,130,246,0.3)}
.btn-outline{background:transparent;color:var(--c-text-dim);border:1px solid var(--c-border)}
.btn-outline:hover{border-color:var(--c-primary);color:var(--c-primary);background:var(--c-primary-dim)}
.btn-ghost{background:transparent;color:var(--c-text-dim)}
.btn-ghost:hover{background:var(--c-surface-2);color:var(--c-text)}
.btn-sm{padding:0.3rem 0.6rem;font-size:0.75rem}
.action-group{display:flex;gap:0.35rem}
#app-main{max-width:1000px;margin:0 auto;padding:1.5rem;display:flex;flex-direction:column;gap:1.25rem}
.panel-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius);padding:1.25rem;transition:background var(--transition),border-color var(--transition)}
.panel-card h2{font-size:0.8125rem;font-weight:600;color:var(--c-text-muted);text-transform:uppercase;letter-spacing:0.05em;margin-bottom:0.75rem}
.panel-title-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:0.75rem}
.panel-title-row h2{margin-bottom:0}
.hidden{display:none !important}
.drop-zone{border:2px dashed var(--c-border);border-radius:var(--radius-sm);transition:border-color var(--transition)}
.drop-zone.dragover{border-color:var(--c-primary);background:var(--c-primary-dim)}
.code-textarea{width:100%;padding:0.75rem 1rem;font-family:var(--font-mono);font-size:0.8125rem;line-height:1.7;color:var(--c-text);background:var(--c-surface-2);border:none;border-radius:var(--radius-sm);resize:vertical;transition:border-color var(--transition)}
.code-textarea:focus{outline:2px solid var(--c-primary);outline-offset:-2px}
.input-actions{display:flex;justify-content:space-between;align-items:center;margin-top:0.5rem}
.stat-badge{padding:0.2rem 0.5rem;font-size:0.6875rem;font-weight:500;font-family:var(--font-mono);color:var(--c-text-muted);background:var(--c-surface-2);border-radius:var(--radius-xs)}
.graph-panel{padding:0.75rem}
#graph-canvas{width:100%;border-radius:var(--radius-sm);background:var(--c-bg);cursor:grab;display:block}
#graph-canvas:active{cursor:grabbing}
.node-info{position:absolute;bottom:1rem;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:0.5rem;padding:0.5rem 1rem;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius-sm);box-shadow:var(--shadow)}
.node-name{font-weight:600;font-size:0.875rem}.node-version{font-family:var(--font-mono);font-size:0.75rem;color:var(--c-text-dim)}
.node-type-badge{padding:0.1rem 0.4rem;font-size:0.625rem;font-weight:600;border-radius:4px;text-transform:uppercase}
.node-type-badge.dep{background:var(--c-primary-dim);color:var(--c-primary)}
.node-type-badge.dev{background:var(--c-accent-dim);color:var(--c-accent)}
.node-type-badge.root{background:rgba(244,63,94,0.15);color:#F43F5E}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0.75rem}
.stat-card{display:flex;flex-direction:column;align-items:center;padding:1rem;background:var(--c-surface-2);border-radius:var(--radius-sm);border:1px solid var(--c-border)}
.stat-val{font-family:var(--font-mono);font-size:1.5rem;font-weight:700;color:var(--c-primary)}
.stat-label{font-size:0.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:0.05em;color:var(--c-text-muted);margin-top:0.25rem}
#toast-container{position:fixed;bottom:1.5rem;right:1.5rem;display:flex;flex-direction:column;gap:0.5rem;z-index:1000}
.toast{padding:0.6rem 1rem;font-size:0.8125rem;border-radius:var(--radius-sm);background:var(--c-surface-2);border:1px solid var(--c-border);color:var(--c-text);box-shadow:var(--shadow);animation:fadeIn 250ms ease;max-width:300px}
.toast.success{border-left:3px solid var(--c-accent)}.toast.error{border-left:3px solid var(--c-danger)}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:700px){.stats-grid{grid-template-columns:repeat(2,1fr)}.header-inner{flex-direction:column;align-items:flex-start}}