:root{--bg: #0f1117;--surface: #1a1d27;--surface2: #242836;--border: #2e3348;--text: #e8eaef;--muted: #8b92a8;--accent: #6366f1;--accent-hover: #818cf8;--success: #22c55e;--warning: #f59e0b;--danger: #ef4444;--radius: 10px;font-family:DM Sans,system-ui,sans-serif;line-height:1.5;color:var(--text);background:var(--bg)}*{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer;border:none;border-radius:var(--radius);padding:.6rem 1.1rem;background:var(--accent);color:#fff;font-weight:600;transition:background .15s}button:hover:not(:disabled){background:var(--accent-hover)}button:disabled{opacity:.5;cursor:not-allowed}button.ghost{background:transparent;border:1px solid var(--border);color:var(--text)}button.ghost:hover:not(:disabled){background:var(--surface2)}button.danger{background:var(--danger)}input,select,textarea{width:100%;padding:.65rem .85rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text)}input:focus,select:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:0}label{display:block;font-size:.85rem;color:var(--muted);margin-bottom:.35rem}.form-group{margin-bottom:1rem}.layout{display:flex;min-height:100vh}.sidebar{width:220px;background:var(--surface);border-right:1px solid var(--border);padding:1.5rem 1rem;flex-shrink:0;display:flex;flex-direction:column}.sidebar h1{font-size:1.1rem;margin-bottom:2rem;padding:0 .5rem;color:var(--accent-hover)}.sidebar nav a{display:block;padding:.65rem .85rem;border-radius:var(--radius);color:var(--muted);margin-bottom:.25rem;font-weight:500}.sidebar nav a:hover,.sidebar nav a.active{background:var(--surface2);color:var(--text)}.main{flex:1;padding:2rem;overflow-x:auto}.page-title{font-size:1.75rem;font-weight:700;margin-bottom:.35rem}.page-sub{color:var(--muted);margin-bottom:1.75rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.25rem;margin-bottom:1.25rem}.card h2{font-size:1rem;margin-bottom:1rem}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem}@media (max-width: 900px){.grid-2{grid-template-columns:1fr}.layout{flex-direction:column}.sidebar{width:100%;border-right:none;border-bottom:1px solid var(--border)}}table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{text-align:left;padding:.65rem .75rem;border-bottom:1px solid var(--border)}th{color:var(--muted);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.03em}.badge{display:inline-block;padding:.2rem .55rem;border-radius:999px;font-size:.75rem;font-weight:600}.badge.available{background:#22c55e26;color:var(--success)}.badge.assigned{background:#6366f126;color:var(--accent-hover)}.badge.active{background:#22c55e26;color:var(--success)}.badge.expired{background:#ef444426;color:var(--danger)}.stats-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:1rem;margin-bottom:1.5rem}.stat-box{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1rem}.stat-box .value{font-size:1.75rem;font-weight:700}.stat-box .label{font-size:.8rem;color:var(--muted);margin-top:.25rem}.alert{padding:.75rem 1rem;border-radius:var(--radius);margin-bottom:1rem;font-size:.9rem}.alert.error{background:#ef44441f;border:1px solid var(--danger);color:#fca5a5}.alert.success{background:#22c55e1f;border:1px solid var(--success);color:#86efac}.flex-between{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}.mono{font-family:ui-monospace,monospace;font-size:.85em}.sidebar-user{font-size:.8rem;color:var(--muted);padding:0 .5rem;margin:-1rem 0 1.25rem}.logout-btn{margin-top:auto;width:100%;margin-top:2rem}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1.5rem}.login-card{width:100%;max-width:400px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:2rem}.login-card h1{font-size:1.5rem;margin-bottom:.35rem;color:var(--accent-hover)}.login-sub{color:var(--muted);font-size:.9rem;margin-bottom:1.5rem}.login-btn{width:100%;margin-top:.5rem}