:root {
    --navy:#18316d; --navy-dark:#10234f; --line:#dde2ea; --bg:#f5f7fa;
    --ink:#222; --muted:#657080; --success:#176b3a; --danger:#9c2525;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--navy);text-decoration:none}
a:hover{text-decoration:underline}
.admin-top{height:72px;background:var(--navy-dark);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 28px}
.admin-top strong{font-size:20px;display:block}
.admin-top span{font-size:12px;opacity:.78}
.admin-user a{color:#fff}
.admin-shell{display:grid;grid-template-columns:230px 1fr;min-height:calc(100vh - 72px)}
.admin-nav{background:#fff;border-right:1px solid var(--line);padding:22px 0}
.admin-nav a{display:block;padding:13px 22px;color:#26354d;font-weight:700}
.admin-nav a:hover{background:#f0f3f8;text-decoration:none}
.admin-main{padding:34px;max-width:1300px}
h1{margin-top:0}
.admin-lead,.admin-heading p{color:var(--muted)}
.admin-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;margin-bottom:20px}
.admin-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:24px;margin:20px 0;box-shadow:0 1px 2px rgba(0,0,0,.025)}
.stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:24px 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:8px;padding:25px}
.stat strong{display:block;font-size:34px;color:var(--navy)}
.stat span{color:var(--muted)}
.button,button{display:inline-block;border:0;border-radius:5px;background:var(--navy);color:white;padding:11px 17px;font-size:14px;font-weight:700;cursor:pointer}
.button:hover,button:hover{background:var(--navy-dark);text-decoration:none}
.button.secondary{background:#687387}
.table-wrap{overflow:auto;padding:0}
table{border-collapse:collapse;width:100%;min-width:740px}
th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);vertical-align:middle}
th{background:#f7f8fa;font-size:12px;text-transform:uppercase;color:#616b79}
.actions{display:flex;gap:13px;align-items:center;justify-content:flex-end}
.actions form{margin:0}
.link-button{background:none;color:var(--danger);padding:0}
.link-button:hover{background:none;text-decoration:underline}
.badge{display:inline-block;border-radius:999px;padding:5px 9px;font-size:11px;font-weight:700}
.badge.on{background:#e6f5ec;color:var(--success)}
.badge.off{background:#f0f0f0;color:#666}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.form-grid label{font-weight:700;font-size:14px}
.form-grid input,.form-grid textarea,.form-grid select{width:100%;margin-top:7px;padding:11px;border:1px solid #cfd5dd;border-radius:5px;font:inherit;background:#fff}
.form-grid textarea{resize:vertical}
.form-grid small{display:block;color:var(--muted);font-weight:400;margin-top:6px}
.span-2{grid-column:1/-1}
.checkbox-label{display:flex;gap:8px;align-items:center;padding-top:28px}
.checkbox-label input{width:auto;margin:0}
.form-actions{display:flex;gap:10px}
.notice{padding:13px 15px;border-radius:5px;margin:15px 0}
.notice.success{background:#e8f6ee;color:var(--success)}
.notice.error{background:#fae9e9;color:var(--danger)}
.admin-thumb{max-width:220px;max-height:150px;object-fit:cover;border:1px solid var(--line)}
.admin-login{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#10234f,#24478f)}
.login-card{width:min(430px,calc(100% - 30px));background:#fff;border-radius:10px;padding:32px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.login-card h1{color:var(--navy);margin-bottom:5px}
.login-card p{color:var(--muted)}
.login-card label{display:block;font-size:14px;font-weight:700;margin:16px 0}
.login-card input{display:block;width:100%;margin-top:7px;padding:12px;border:1px solid #ccd3dc;border-radius:5px;font:inherit}
.login-card button{width:100%;margin-top:6px}
@media(max-width:800px){
 .admin-shell{grid-template-columns:1fr}
 .admin-nav{display:flex;overflow:auto;padding:0}
 .admin-nav a{white-space:nowrap}
 .admin-main{padding:22px 15px}
 .stat-grid,.form-grid{grid-template-columns:1fr}
 .span-2{grid-column:auto}
 .admin-heading{flex-direction:column}
}