:root{--bg:#f5f6f8;--card:#fff;--text:#1f2430;--muted:#6b7280;--line:#e5e7eb;--primary:#2563eb;--ok:#16a34a;--warn:#d97706;--bad:#dc2626;--info:#0891b2}
*{box-sizing:border-box}
body{margin:0;font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:1.5rem;margin:0 0 1rem}h2{font-size:1.15rem;margin:1.8rem 0 .7rem}h3{margin:0 0 .5rem;font-size:1rem}
code{background:#eef0f4;padding:1px 6px;border-radius:4px;font-size:.85em}
main{max-width:1180px;margin:0 auto;padding:1.5rem 1rem 4rem}
.topbar{display:flex;align-items:center;gap:1.2rem;background:#111827;color:#fff;padding:.6rem 1.2rem;flex-wrap:wrap}
.topbar a{color:#d1d5db}.topbar a:hover{color:#fff;text-decoration:none}
.brand{font-weight:700;color:#fff!important;font-size:1.1rem}
.topbar nav{display:flex;gap:.3rem;flex:1;flex-wrap:wrap}
.topbar nav a{padding:.35rem .75rem;border-radius:6px}
.topbar nav a.active{background:#374151;color:#fff}
.topbar .user{display:flex;gap:.8rem;align-items:center}
.topbar form{margin:0}
.page-head{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:.5rem}
.page-head h1{margin:0}
.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:.9rem;margin:1rem 0}
.card{background:var(--card);border:1px solid var(--line);border-left:4px solid #9ca3af;border-radius:10px;padding:.9rem 1rem}
.card.ok{border-left-color:var(--ok)}.card.warn{border-left-color:var(--warn)}.card.bad{border-left-color:var(--bad)}.card.info{border-left-color:var(--info)}
.card .label{color:var(--muted);font-size:.85rem}.card .value{font-size:1.9rem;font-weight:700}.card .value.sm{font-size:1.25rem;padding-top:.35rem}
.table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%}
th,td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line);vertical-align:middle}
th{font-size:.8rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);background:#fafafa}
tr:last-child td{border-bottom:0}
td.num{text-align:right;white-space:nowrap}
td.actions{white-space:nowrap}td.actions>*{display:inline-block;margin-right:.6rem}td.actions form{margin:0}
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.78rem;font-weight:600;background:#e5e7eb;color:#374151;vertical-align:middle}
.acc-available,.rent-active{background:#dcfce7;color:#166534}
.acc-renting{background:#cffafe;color:#155e75}
.acc-locked,.acc-error,.rent-overdue{background:#fee2e2;color:#991b1b}
.rent-ended{background:#e5e7eb;color:#4b5563}
.btn{display:inline-block;padding:.5rem 1rem;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text);font:inherit;cursor:pointer}
.btn:hover{background:#f3f4f6;text-decoration:none}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.primary:hover{background:#1d4ed8}
.btn.danger-btn{color:var(--bad);border-color:#fecaca}.btn.block{width:100%;margin-top:.5rem}
button.link{background:none;border:0;padding:0;font:inherit;color:var(--primary);cursor:pointer}
button.link.danger{color:var(--bad)}.topbar button.link{color:#d1d5db}
.filters{display:flex;gap:.6rem;flex-wrap:wrap;margin:.8rem 0 1rem}
input,select,textarea{font:inherit;padding:.5rem .65rem;border:1px solid #cbd5e1;border-radius:8px;background:#fff;width:100%}
.filters input,.filters select{width:auto;min-width:200px}
input:focus,select:focus,textarea:focus{outline:2px solid #bfdbfe;border-color:var(--primary)}
.form{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1.2rem}
.form.narrow{max-width:620px}
label{display:block;font-size:.88rem;font-weight:600;margin-bottom:.9rem}
label input,label select,label textarea{margin-top:.3rem;font-weight:400}
.row{display:flex;gap:.9rem;flex-wrap:wrap;align-items:flex-end}.row>label{flex:1;min-width:150px}
.flash{padding:.7rem 1rem;border-radius:8px;margin-bottom:1rem;border:1px solid}
.flash.ok{background:#f0fdf4;border-color:#bbf7d0;color:#166534}.flash.error{background:#fef2f2;border-color:#fecaca;color:#991b1b}
.login-card{max-width:380px;margin:8vh auto;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:2rem}
.login-card h1{text-align:center;margin-bottom:.3rem}.login-card p{text-align:center;margin-top:0}
.panels{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1rem;margin:1rem 0}
.panel{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem;margin-bottom:1rem}
.panels .panel{margin-bottom:0}
dl.info{display:grid;grid-template-columns:max-content 1fr;gap:.4rem 1.2rem;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1rem;margin:1rem 0}
dl.info dt{color:var(--muted)}dl.info dd{margin:0}
@media(max-width:640px){main{padding:1rem .7rem}.topbar{padding:.6rem .8rem}}