:root{
  --ai:#1F3A5F; --ai-dark:#142B45; --washi:#F7F4EC; --shu:#B23A2E;
  --matcha:#3C7A5C; --line:#E3DECF; --sumi:#201F1D; --sumi-soft:#6b675e;
}
*{box-sizing:border-box;}
body{margin:0;font-family:'Inter',Arial,sans-serif;background:var(--washi);color:var(--sumi);}
a{color:var(--ai);text-decoration:none;}
.admin-shell{display:flex;min-height:100vh;}
.admin-sidebar{width:230px;background:var(--ai-dark);color:#fff;padding:24px 18px;flex-shrink:0;}
.admin-sidebar h2{font-size:1.05rem;margin:0 0 30px;}
.admin-sidebar h2 span{color:#E8B4AC;display:block;font-size:0.78rem;font-weight:400;margin-top:2px;}
.admin-sidebar a{display:block;color:rgba(255,255,255,0.82);padding:10px 12px;border-radius:4px;margin-bottom:4px;font-size:0.92rem;}
.admin-sidebar a:hover,.admin-sidebar a.active{background:rgba(255,255,255,0.1);color:#fff;}
.admin-main{flex:1;padding:34px 40px;}
.admin-topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px;}
.admin-topbar h1{font-size:1.4rem;margin:0;color:var(--ai-dark);}
.btn{display:inline-block;padding:10px 18px;border-radius:4px;font-weight:600;font-size:0.9rem;border:1px solid transparent;cursor:pointer;}
.btn-primary{background:var(--shu);color:#fff;}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--sumi);}
.btn-danger{background:#fff;border-color:var(--shu);color:var(--shu);}
.btn-sm{padding:6px 12px;font-size:0.8rem;}
.card{background:#fff;border:1px solid var(--line);border-radius:6px;padding:22px;margin-bottom:22px;}
table{width:100%;border-collapse:collapse;}
table th,table td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:0.9rem;}
table thead th{background:var(--washi);font-weight:600;color:var(--sumi-soft);font-size:0.78rem;text-transform:uppercase;letter-spacing:0.03em;}
.form-row{margin-bottom:16px;}
.form-row label{display:block;font-size:0.85rem;font-weight:600;margin-bottom:6px;color:var(--sumi-soft);}
.form-row input,.form-row select,.form-row textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:4px;font-family:inherit;font-size:0.92rem;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.stat-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:30px;}
.stat-cards .card{margin:0;text-align:center;}
.stat-cards .n{font-size:1.8rem;font-weight:700;color:var(--ai-dark);}
.stat-cards .l{font-size:0.8rem;color:var(--sumi-soft);}
.alert{padding:12px 16px;border-radius:4px;margin-bottom:18px;font-size:0.9rem;}
.alert-success{background:#E4F0EA;color:var(--matcha);}
.alert-error{background:#F7E6E4;color:var(--shu);}
.badge{padding:3px 10px;border-radius:20px;font-size:0.75rem;font-weight:600;}
.badge-success{background:#E4F0EA;color:var(--matcha);}
.badge-danger{background:#F7E6E4;color:var(--shu);}
.badge-info{background:#E7ECF2;color:var(--ai);}
.badge-neutral{background:#EDEBE4;color:var(--sumi-soft);}
.login-wrap{display:flex;min-height:100vh;align-items:center;justify-content:center;}
.login-box{background:#fff;padding:36px;border-radius:6px;box-shadow:0 4px 24px rgba(0,0,0,.08);width:100%;max-width:380px;}
.login-box h1{font-size:1.2rem;color:var(--ai-dark);margin-bottom:20px;}
.toggle-row{display:flex;align-items:center;gap:8px;font-size:0.85rem;}