:root{--bg:#0f172a;--card:#fff;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--brand:#2563eb;--brand-d:#1d4ed8;--ok:#16a34a;--err:#dc2626}
*{box-sizing:border-box}
body{margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:#f1f5f9}
a{color:var(--brand);text-decoration:none}
h1{font-size:1.5rem;margin:.2rem 0}h2{font-size:1.1rem}
.top{display:flex;flex-wrap:wrap;gap:.75rem 1.5rem;align-items:center;justify-content:space-between;background:var(--bg);color:#fff;padding:.9rem 1.25rem}
.top strong{font-size:1.1rem;letter-spacing:.3px}
.top nav{display:flex;flex-wrap:wrap;gap:1rem}
.top nav a{color:#cbd5e1;font-weight:500}
.top nav a:hover,.top nav a.on{color:#fff}
.wrap{max-width:960px;margin:0 auto;padding:1.25rem}
.muted{color:var(--muted);font-size:.9rem}
.heading{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin:.5rem 0 1rem}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:.55rem .9rem;border-radius:8px;font-weight:600}
.btn:hover{background:var(--brand-d)}
.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1.1rem;margin-bottom:1.1rem;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.1rem}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1rem}
.stat span{display:block;color:var(--muted);font-size:.85rem}
.stat b{display:block;font-size:1.6rem;margin-top:.25rem}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{text-align:left;padding:.6rem .5rem;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.4px}
form label{display:block;margin:.8rem 0 .3rem;font-weight:600;font-size:.9rem}
input,select,.search input{width:100%;padding:.6rem .7rem;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff}
input:focus,select:focus{outline:2px solid var(--brand);border-color:var(--brand)}
button{margin-top:1rem;background:var(--brand);color:#fff;border:0;padding:.65rem 1.1rem;border-radius:8px;font-weight:600;cursor:pointer}
button:hover{background:var(--brand-d)}
.form-panel{max-width:460px}
.search{display:flex;gap:.5rem;margin-bottom:1rem;max-width:520px}
.search button{margin:0}
.error{color:var(--err);background:#fef2f2;border:1px solid #fecaca;padding:.6rem .75rem;border-radius:8px}
.success{color:var(--ok);background:#f0fdf4;border:1px solid #bbf7d0;padding:.6rem .75rem;border-radius:8px}
.auth{min-height:100vh;display:grid;place-items:center;padding:1.25rem}
.auth .panel{width:100%;max-width:380px}
footer{text-align:center;color:var(--muted);font-size:.85rem;padding:1.5rem}
.tree ul{list-style:none;margin:0;padding-left:1.25rem;border-left:2px solid var(--line)}
.tree>ul{padding-left:0;border:0}
.tree li{margin:.5rem 0}
.node{display:inline-block;background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:.5rem .7rem;line-height:1.3}
.node b{color:var(--brand)}
.node small{display:block;color:var(--muted)}