:root{--bg:#0f172a;--panel:#1e293b;--accent:#2563eb;--free:#16a34a;--full:#64748b;--blocked:#b91c1c;--mine:#7c3aed;--text:#e2e8f0}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,Segoe UI,sans-serif;background:#f1f5f9;color:#0f172a}
.layout{display:flex;min-height:100vh}
.sidebar{width:230px;background:var(--bg);color:var(--text);padding:1rem;display:flex;flex-direction:column;gap:.25rem}
.sidebar .brand{font-size:1.5rem;font-weight:700;margin-bottom:1rem;letter-spacing:2px}
.sidebar a{color:#cbd5e1;text-decoration:none;padding:.5rem .75rem;border-radius:.5rem}
.sidebar a:hover,.sidebar a.active{background:var(--accent);color:#fff}
.content{flex:1;display:flex;flex-direction:column}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1.5rem;background:#fff;border-bottom:1px solid #e2e8f0}
.topbar a{color:var(--accent);text-decoration:none}
.page{padding:1.5rem}
.cards{display:flex;gap:1rem;flex-wrap:wrap}
.card{background:#fff;border-radius:.75rem;padding:1.25rem 1.5rem;box-shadow:0 1px 3px rgba(0,0,0,.1);min-width:180px}
.card .num{font-size:2rem;font-weight:700;color:var(--accent)}
.toolbar{display:flex;gap:1rem;align-items:center;margin:1rem 0;flex-wrap:wrap}
.quota{margin-left:auto;font-weight:600}
table.calendar{width:100%;border-collapse:collapse;background:#fff}
table.calendar th,table.calendar td{border:1px solid #e2e8f0;padding:.4rem;text-align:center;font-size:.85rem}
td.free{background:#dcfce7;cursor:pointer}td.free:hover{background:#bbf7d0}
td.full{background:#e2e8f0;color:#64748b;cursor:pointer}td.full:hover{background:#cbd5e1}
td.blocked{background:#fee2e2;color:#b91c1c}
td.mine{background:#ede9fe;color:#6d28d9;cursor:pointer;font-weight:600}
.login{max-width:340px;margin:8vh auto;background:#fff;padding:2rem;border-radius:.75rem;box-shadow:0 4px 12px rgba(0,0,0,.1)}
.login input{display:block;width:100%;margin:.5rem 0;padding:.6rem;border:1px solid #cbd5e1;border-radius:.5rem}
.login button,.toolbar button{background:var(--accent);color:#fff;border:0;padding:.6rem 1rem;border-radius:.5rem;cursor:pointer}
.err{color:#b91c1c;margin-top:.5rem}
.ok{color:#15803d;margin-top:.5rem}
table.grid{width:100%;border-collapse:collapse;background:#fff;margin:.75rem 0}
table.grid th,table.grid td{border:1px solid #e2e8f0;padding:.45rem .6rem;text-align:left;font-size:.9rem;vertical-align:middle}
table.grid th{background:#f8fafc}
.panel{background:#fff;border-radius:.75rem;padding:1rem 1.25rem;box-shadow:0 1px 3px rgba(0,0,0,.1);margin:1rem 0}
.panel h2,.page h2{font-size:1.1rem;margin:.25rem 0 .75rem}
.frm{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center}
.frm input,.frm select,.toolbar select{padding:.45rem .6rem;border:1px solid #cbd5e1;border-radius:.5rem;background:#fff}
.btn{background:var(--accent);color:#fff;border:0;padding:.45rem .9rem;border-radius:.5rem;cursor:pointer}
.btn.sm{padding:.25rem .6rem;font-size:.8rem}
.btn.danger{background:#b91c1c}
.btn.ghost{background:#e2e8f0;color:#0f172a}
.btn:disabled{opacity:.5;cursor:default}
.badge{display:inline-block;padding:.1rem .5rem;border-radius:1rem;font-size:.75rem;font-weight:600}
.badge.on{background:#dcfce7;color:#15803d}
.badge.off{background:#fee2e2;color:#b91c1c}
.badge.info{background:#dbeafe;color:#1d4ed8}
.token-box{background:#fef9c3;border:1px solid #eab308;padding:.75rem 1rem;border-radius:.5rem;margin:.75rem 0;font-family:monospace;word-break:break-all}
.hint{color:#64748b;font-size:.9rem}
.session-card{background:#fff;border-radius:.75rem;padding:1.25rem 1.5rem;box-shadow:0 1px 3px rgba(0,0,0,.1);margin:1rem 0;max-width:560px}
.session-card .pwd{font-family:monospace;background:#f1f5f9;padding:.2rem .5rem;border-radius:.25rem}
.matrix input[type=checkbox]{transform:scale(1.2)}
.banner{background:#1d4ed8;color:#fff;padding:.75rem 1.5rem;font-weight:600;text-align:center;animation:banner-in .2s ease-out}
@keyframes banner-in{from{opacity:0;transform:translateY(-.5rem)}to{opacity:1;transform:translateY(0)}}