:root{
  --bg:#f4f6f8; --card:#fff; --ink:#1d2730; --mut:#5c6b78; --line:#dde4ea;
  --prime:#0f6b4f; --prime2:#0c5a43; --bad:#b3261e; --ok:#0f6b4f; --warn:#9a6a14;
  --r:12px; --sh:0 1px 2px rgba(16,24,32,.06),0 4px 14px rgba(16,24,32,.06);
}
*{box-sizing:border-box}
body{margin:0;font:15px/1.45 system-ui,'Segoe UI',Arial,sans-serif;background:var(--bg);color:var(--ink)}
button{font:inherit;cursor:pointer}
input,select{font:inherit;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:8px;padding:9px 11px;width:100%}
input:focus,select:focus{outline:2px solid #bcd9cf;border-color:var(--prime)}
label{display:block;font-size:13px;color:var(--mut)}
label input,label select{margin-top:4px}
.btn{border:1px solid var(--line);background:#fff;border-radius:9px;padding:9px 16px;color:var(--ink)}
.btn:hover{border-color:#b9c4cd}
.btn.prime{background:var(--prime);border-color:var(--prime);color:#fff}
.btn.prime:hover{background:var(--prime2)}
.btn.danger{color:var(--bad);border-color:#e3b7b4}
.btn.sm{padding:5px 11px;font-size:13px;border-radius:7px}
.btn[disabled]{opacity:.55;cursor:default}

/* Login */
.lwrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.lcard{background:var(--card);border-radius:16px;box-shadow:var(--sh);padding:34px 32px;width:100%;max-width:400px}
.lcard h1{margin:0 0 4px;font-size:22px}
.lcard .sub{color:var(--mut);font-size:14px;margin:0 0 20px}
.lcard label{margin-bottom:12px}
.lcard .btn{width:100%;margin-top:6px}
.err{color:var(--bad);font-size:13px;min-height:18px;margin:8px 0 0}
.qrbox{text-align:center;margin:10px 0}
.qrbox img{width:200px;height:200px;border:1px solid var(--line);border-radius:10px}
.secret{font-family:ui-monospace,Consolas,monospace;font-size:13px;background:#f0f3f5;border-radius:7px;padding:7px 9px;word-break:break-all;text-align:center;margin:6px 0 12px}
.bcodes{display:grid;grid-template-columns:1fr 1fr;gap:6px;font-family:ui-monospace,Consolas,monospace;font-size:14px;background:#f0f3f5;border-radius:9px;padding:12px;margin:10px 0}
.hint{font-size:13px;color:var(--mut)}

/* Shell */
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.hbar{max-width:1100px;margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:18px}
.logo{font-weight:800;letter-spacing:.3px}
.logo span{color:var(--prime)}
nav{display:flex;gap:4px;flex:1}
nav button{border:0;background:none;padding:8px 13px;border-radius:8px;color:var(--mut)}
nav button.on{background:#e7efeb;color:var(--prime);font-weight:600}
.who{font-size:13px;color:var(--mut);text-align:right}
main{max-width:1100px;margin:0 auto;padding:20px 18px 60px}
h2{font-size:19px;margin:6px 0 14px}
.bar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.sp{flex:1}

/* Cards and tables */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.unit{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px;cursor:pointer}
.unit:hover{box-shadow:var(--sh)}
.unit b{font-size:16px}
.unit .st{font-size:12.5px;margin-top:4px}
.st.free{color:var(--mut)} .st.rented{color:var(--ok);font-weight:600} .st.sent{color:var(--warn)}
.tbl{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.tbl th{font-size:12.5px;text-transform:uppercase;letter-spacing:.4px;color:var(--mut);text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);background:#fafbfc}
.tbl td{padding:10px 12px;border-bottom:1px solid #eef2f5}
.tbl tr:last-child td{border-bottom:0}
.tbl tr.row{cursor:pointer}
.tbl tr.row:hover{background:#f6f9f8}
.pill{display:inline-block;font-size:12px;padding:2px 9px;border-radius:99px;background:#eef2f5;color:var(--mut)}
.pill.ok{background:#e3efe9;color:var(--ok)} .pill.warn{background:#f6ecd9;color:var(--warn)} .pill.bad{background:#f7e4e2;color:var(--bad)}

/* Modal */
.mback{position:fixed;inset:0;background:rgba(20,28,34,.45);display:flex;align-items:flex-start;justify-content:center;padding:4vh 14px;z-index:20;overflow:auto}
.modal{background:#fff;border-radius:16px;max-width:680px;width:100%;box-shadow:0 18px 50px rgba(10,18,24,.25)}
.mhead{padding:16px 22px;border-bottom:1px solid var(--line)}
.mhead h3{margin:0;font-size:17px}
.mhead p{margin:3px 0 0;font-size:13px;color:var(--mut)}
.mbody{padding:18px 22px}
.mfoot{padding:14px 22px;border-top:1px solid var(--line);display:flex;gap:10px;justify-content:flex-end}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.frow.f3{grid-template-columns:1fr 1fr 1fr}
.fset{border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:0 0 12px}
.fset legend{font-size:13px;color:var(--mut);padding:0 6px}
.seg2{display:flex;gap:16px;margin-bottom:10px;font-size:14px}
.seg2 label{display:flex;align-items:center;gap:6px;color:var(--ink)}
.seg2 input{width:auto}
.hrow{display:grid;grid-template-columns:130px 1fr 110px;gap:8px;align-items:center;margin-bottom:7px;font-size:14px}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:#20302a;color:#fff;border-radius:10px;padding:11px 20px;font-size:14px;box-shadow:var(--sh);z-index:40}
@media(max-width:640px){.frow,.frow.f3{grid-template-columns:1fr}.hbar{flex-wrap:wrap}.who{display:none}}
.sp{flex:1}
.w210{width:210px}