:root{--bg:#0f0f12;--surface:#1a1a1f;--surface-2:#212128;--border:#2d2d35;--text:#e8e8ec;--text-muted:#888;--primary:#6366f1;--primary-hover:#818cf8;--accent:#22c55e;--danger:#f87171;--mono:"DM Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;--font-sans:"DM Sans", system-ui, sans-serif;--radius:12px;--shadow:0 4px 24px #0006}*{box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);min-height:100vh;margin:0;line-height:1.5}#app{max-width:1080px;margin:0 auto;padding:1.5rem}.header{text-align:center;margin-bottom:1.75rem}.header h1{letter-spacing:-.03em;margin:0 0 .25rem;font-size:1.9rem;font-weight:700}.tagline{color:var(--text-muted);margin:0;font-size:.95rem}.main{grid-template-columns:minmax(320px,420px) 1fr;align-items:start;gap:1.5rem;display:grid}@media (width<=860px){.main{grid-template-columns:1fr}}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.25rem}.panel-title{text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin:0 0 .75rem;font-size:.8rem;font-weight:600}.panel-title:not(:first-child){margin-top:1.5rem}.field{flex-direction:column;gap:.3rem;display:flex}.field-label{color:var(--text-muted);font-size:.8rem}.field-hint{color:var(--text-muted);font-size:.75rem;font-family:var(--mono)}.network-row{grid-template-columns:1fr .8fr;gap:.75rem;display:grid}input[type=text],input[type=number]{background:var(--bg);border:1px solid var(--border);width:100%;color:var(--text);font-size:.95rem;font-family:var(--mono);border-radius:8px;padding:.55rem .7rem}input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #6366f133}.subnet-list{flex-direction:column;gap:.5rem;margin:0;padding:0;list-style:none;display:flex}.subnet-row{grid-template-columns:1.5rem 1fr 6.5rem 2rem;align-items:center;gap:.5rem;display:grid}.subnet-num{font-family:var(--mono);color:var(--text-muted);text-align:center;font-size:.8rem}.subnet-name{font-family:var(--font-sans)!important}.btn-icon{border:1px solid var(--border);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:8px;width:2rem;height:2.1rem;font-size:1.1rem;line-height:1;transition:all .15s}.btn-icon:hover{border-color:var(--danger);color:var(--danger)}.actions{flex-wrap:wrap;gap:.5rem;margin-top:1rem;display:flex}.btn{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.55rem .9rem;font-family:inherit;font-size:.9rem;font-weight:600;transition:background .15s}.btn:hover{background:var(--primary-hover)}.btn-ghost{border:1px solid var(--border);color:var(--text-muted);background:0 0}.btn-ghost:hover{background:var(--surface-2);color:var(--text)}.results{min-height:200px}.notice{border-radius:8px;margin:0;padding:.8rem 1rem;font-size:.9rem}.notice-error{color:#fca5a5;background:#f871711a;border:1px solid #f8717159}.summary{background:var(--surface-2);font-size:.9rem;font-family:var(--mono);border-radius:8px;flex-direction:column;gap:.15rem;margin-bottom:1rem;padding:.6rem .8rem;display:flex}.summary .muted{font-size:.8rem}.table-wrap{overflow-x:auto}.subnet-table{border-collapse:collapse;width:100%;font-size:.85rem}.subnet-table th{text-align:left;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;border-bottom:1px solid var(--border);white-space:nowrap;padding:.4rem .6rem;font-size:.72rem;font-weight:600}.subnet-table td{border-bottom:1px solid var(--border);white-space:nowrap;padding:.5rem .6rem}.subnet-table tbody tr:hover{background:var(--surface-2)}.cell-name{font-weight:600}.mono{font-family:var(--mono)}.num{font-family:var(--mono);text-align:right}.num strong{color:var(--accent)}.muted{color:var(--text-muted);font-weight:400}.footer{text-align:center;margin-top:2rem;font-size:.8rem}.footer a{color:var(--text-muted);text-decoration:none}.footer a:hover{color:var(--primary-hover)}