:root{--cyan:#1FBED4;--cyan-d:#1499ad;--purple:#7B3FD4;--purple-d:#5f2db0;--ink:#15202b;--muted:#6b7a87;
  --line:#e6ecf0;--bg:#f3f6f8;--grad:linear-gradient(135deg,#1FBED4,#7B3FD4);--ok:#15803d;--danger:#dc2626;--radius:12px}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',system-ui,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:14.5px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* login */
.login-body{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--grad)}
.login-card{background:#fff;padding:38px 34px;border-radius:16px;width:360px;max-width:92vw;box-shadow:0 20px 50px rgba(0,0,0,.25);text-align:center}
.login-logo{height:46px;margin:0 auto 16px}
.login-card h1{font-size:20px;margin-bottom:18px}
.login-card label{display:block;text-align:left;font-weight:600;font-size:13px;margin-bottom:14px}
.login-card input{width:100%;margin-top:6px;padding:11px 13px;border:1.5px solid var(--line);border-radius:9px;font:inherit}
.login-card input:focus{outline:none;border-color:var(--cyan)}
.login-card .btn{width:100%;margin-top:6px}
.back-link{display:inline-block;margin-top:16px;color:var(--muted);font-size:13px}

/* shell */
.admin-shell{display:flex;min-height:100vh}
.sidebar{width:236px;background:#0f1820;color:#c8d2da;flex-shrink:0;display:flex;flex-direction:column}
.side-brand{padding:20px;border-bottom:1px solid rgba(255,255,255,.08)}
.side-brand img{height:36px;background:#fff;padding:5px 8px;border-radius:7px}
.side-nav{display:flex;flex-direction:column;padding:12px 0}
.side-nav a{padding:12px 22px;font-weight:600;color:#aebcc7;border-left:3px solid transparent}
.side-nav a:hover{background:rgba(255,255,255,.05);color:#fff}
.side-nav a.active{color:#fff;border-left-color:var(--cyan);background:rgba(31,190,212,.12)}
.admin-main{flex:1;min-width:0}
.admin-top{display:flex;justify-content:space-between;align-items:center;background:#fff;padding:16px 26px;border-bottom:1px solid var(--line)}
.admin-title{font-weight:800;font-size:18px}
.admin-user{color:var(--muted);font-size:13.5px}
.admin-content{padding:26px}

/* alerts */
.alert{padding:12px 26px;font-weight:600;font-size:14px}
.alert-success{background:#e7f8ee;color:var(--ok)}
.alert-error{background:#fdecec;color:var(--danger)}

/* stats */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:24px}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;gap:4px}
.stat-num{font-size:30px;font-weight:800}
.stat-label{color:var(--muted);font-size:13px;font-weight:600}
.stat-accent{background:var(--grad);color:#fff;border:none}
.stat-accent .stat-label{color:rgba(255,255,255,.9)}

/* card */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px}
.card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.card-head h2{font-size:18px}
.muted{color:var(--muted)}.nowrap{white-space:nowrap}

/* table */
.table{width:100%;border-collapse:collapse}
.table th,.table td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top;font-size:13.8px}
.table th{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.table tr:hover td{background:#fafcfd}
.truncate{max-width:280px}
.thumb-sm{width:44px;height:44px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}
.thumb{width:90px;height:90px;object-fit:cover;border-radius:8px;border:1px solid var(--line);margin-top:8px}
.badge{display:inline-block;padding:3px 9px;border-radius:999px;background:#eef2f5;color:var(--muted);font-size:12px;font-weight:700}
.badge-ok{background:#e7f8ee;color:var(--ok)}
.actions{white-space:nowrap;display:flex;gap:6px}
.inline-form{margin:0}

/* forms */
.form label{display:block;font-weight:600;font-size:13.5px;margin-bottom:16px}
.form small{font-weight:400;color:var(--muted)}
.form input,.form select,.form textarea{width:100%;margin-top:6px;padding:11px 13px;border:1.5px solid var(--line);border-radius:9px;font:inherit;background:#fff}
.form input[type=file]{padding:8px;background:#fafcfd}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--cyan)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-section{font-size:14px;text-transform:uppercase;letter-spacing:.04em;color:var(--purple);margin:18px 0 14px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.checks{display:flex;flex-direction:column;gap:10px;justify-content:center}
.check{display:flex;align-items:center;gap:8px;font-weight:600}
.check input{width:auto;margin:0}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-weight:700;padding:11px 20px;border-radius:9px;border:1.5px solid transparent;cursor:pointer;font-size:14px;font-family:inherit;transition:.15s}
.btn-sm{padding:8px 15px;font-size:13px}
.btn-xs{padding:6px 11px;font-size:12.5px}
.btn-primary{background:var(--grad);color:#fff}
.btn-primary:hover{filter:brightness(1.06)}
.btn-outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--cyan);color:var(--cyan-d)}
.btn-danger{background:#fff;border-color:#f3c9c9;color:var(--danger)}
.btn-danger:hover{background:var(--danger);color:#fff;border-color:var(--danger)}

@media(max-width:820px){
  .admin-shell{flex-direction:column}
  .sidebar{width:100%;flex-direction:row;overflow-x:auto}
  .side-brand{display:none}
  .side-nav{flex-direction:row;padding:0}
  .side-nav a{white-space:nowrap;border-left:none;border-bottom:3px solid transparent;padding:14px 16px}
  .side-nav a.active{border-left:none;border-bottom-color:var(--cyan)}
  .stat-grid,.grid-2{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){.stat-grid,.grid-2{grid-template-columns:1fr}}