:root{
  --green:#1b8a4b; --green-bg:#e7f6ec; --green-line:#8bd3a5;
  --red:#c0392b;   --red-bg:#fdeceb;   --red-line:#f0a9a2;
  --ink:#1f2937;   --muted:#6b7280;    --line:#e5e7eb;
  --bg:#f4f6f8;    --brand:#0f3d6e;    --brand-2:#12508f;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}

/* Login */
.login-body{display:flex;min-height:100vh;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#0f3d6e,#12508f)}
.login-card{background:#fff;padding:32px;border-radius:14px;width:340px;max-width:92vw;
  box-shadow:0 18px 45px rgba(0,0,0,.25)}
.login-card h1{margin:0;color:var(--brand);font-size:30px;letter-spacing:.5px}
.subtitle{margin:2px 0 18px;color:var(--muted);font-size:13px}
.login-card label{display:block;font-size:13px;color:var(--muted);margin-bottom:12px}
.login-card input{width:100%;margin-top:5px;padding:11px 12px;border:1px solid var(--line);
  border-radius:9px;font-size:15px}
.login-card button{width:100%;margin-top:6px;padding:12px;border:0;border-radius:9px;
  background:var(--brand);color:#fff;font-size:16px;font-weight:600;cursor:pointer}
.login-card button:hover{background:var(--brand-2)}
.hint{margin-top:14px;font-size:11px;color:var(--muted);text-align:center}
.alert{background:var(--red-bg);color:var(--red);border:1px solid var(--red-line);
  padding:9px 11px;border-radius:8px;font-size:13px;margin-bottom:14px}

/* Topbar */
.topbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;
  background:var(--brand);color:#fff;padding:12px 20px}
.brand{font-size:19px;font-weight:700}
.brand span{font-weight:400;opacity:.8;font-size:14px}
.top-right{display:flex;align-items:center;gap:14px;font-size:14px}
.whoami{opacity:.95}
.linkbtn{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;
  padding:6px 12px;border-radius:7px;font-size:13px;cursor:pointer;text-decoration:none;display:inline-block}
.linkbtn:hover{background:rgba(255,255,255,.15)}

/* Summary */
.summary{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 20px 4px}
.pill{padding:6px 14px;border-radius:999px;font-weight:600;font-size:14px}
.pill-green{background:var(--green-bg);color:var(--green);border:1px solid var(--green-line)}
.pill-red{background:var(--red-bg);color:var(--red);border:1px solid var(--red-line)}
.updated{margin-left:auto;color:var(--muted);font-size:12px;display:flex;align-items:center;gap:6px}
.dot{width:9px;height:9px;border-radius:50%;background:var(--green);display:inline-block;
  box-shadow:0 0 0 0 rgba(27,138,75,.6);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(27,138,75,.5)}70%{box-shadow:0 0 0 7px rgba(27,138,75,0)}100%{box-shadow:0 0 0 0 rgba(27,138,75,0)}}

/* Board */
.board{padding:12px 20px 40px}
.loading{color:var(--muted)}
.office-group{margin-top:18px}
.office-title{font-size:15px;font-weight:700;color:var(--brand);margin:0 0 10px;
  padding-bottom:6px;border-bottom:2px solid var(--line);display:flex;align-items:center;gap:10px}
.office-count{font-size:12px;font-weight:500;color:var(--muted)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:12px}

.card{border-radius:12px;border:1px solid var(--line);background:#fff;padding:14px;
  border-left:6px solid var(--green);position:relative;transition:box-shadow .15s}
.card:hover{box-shadow:0 6px 18px rgba(0,0,0,.08)}
.card.busy{border-left-color:var(--red);background:var(--red-bg)}
.card.free{border-left-color:var(--green);background:var(--green-bg)}
.card .seat{position:absolute;top:12px;right:14px;font-size:11px;color:var(--muted)}
.card .pname{font-weight:700;font-size:15px;margin:0 40px 2px 0}
.card .title{font-size:12px;color:var(--muted);margin:0 0 6px}
.card .email{font-size:12px;color:#374151;word-break:break-all;margin:0 0 10px}
.status-row{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:6px}
.badge{font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px}
.badge.free{background:#fff;color:var(--green);border:1px solid var(--green-line)}
.badge.busy{background:#fff;color:var(--red);border:1px solid var(--red-line)}
.occ{font-size:13px;margin:6px 0 0}
.occ b{color:var(--red)}
.occ .since{color:var(--muted);font-size:11px}
.card button{border:0;border-radius:8px;padding:7px 13px;font-size:13px;font-weight:600;cursor:pointer}
.btn-take{background:var(--green);color:#fff}
.btn-take:hover{filter:brightness(.95)}
.btn-free{background:var(--red);color:#fff}
.btn-free:hover{filter:brightness(.95)}
.btn-disabled{background:#eef0f2;color:#9aa1a9;cursor:not-allowed}

/* Modal */
.modal-backdrop{position:fixed;inset:0;background:rgba(15,23,42,.5);display:flex;
  align-items:center;justify-content:center;padding:16px;z-index:50}
.modal{background:#fff;border-radius:14px;padding:22px;width:360px;max-width:94vw;
  box-shadow:0 20px 50px rgba(0,0,0,.3)}
.modal h3{margin:0 0 6px;color:var(--brand)}
.modal-acc{font-size:13px;color:var(--muted);margin:0 0 14px}
.modal label{display:block;font-size:13px;color:var(--muted);margin-bottom:12px}
.modal input{width:100%;margin-top:5px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:15px}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:6px}
.btn-primary{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:10px 16px;font-weight:600;cursor:pointer}
.btn-secondary{background:#eef0f2;color:#374151;border:0;border-radius:8px;padding:10px 16px;font-weight:600;cursor:pointer}
.pwd-msg{padding:8px 10px;border-radius:8px;font-size:13px;margin-bottom:12px}
.pwd-msg.err{background:var(--red-bg);color:var(--red)}
.pwd-msg.ok{background:var(--green-bg);color:var(--green)}

.modal-backdrop[hidden]{display:none}