:root{--blue:#102a86;--red:#ef4b2f;--bg:#f3f5f8;--ink:#17203b;--line:#d9deea}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--ink)}
a{color:inherit;text-decoration:none}
.admin-shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.admin-sidebar{background:var(--blue);color:#fff;padding:30px 22px}
.admin-sidebar strong{display:block;margin-bottom:32px}
.admin-sidebar nav{display:grid;gap:10px}
.admin-sidebar a{padding:10px 12px;border-radius:6px}
.admin-sidebar a:hover{background:rgba(255,255,255,.12)}
.admin-main{padding:36px}
.admin-top{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px}
.panel{background:#fff;border:1px solid var(--line);border-radius:10px;padding:24px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.stat{background:#fff;border:1px solid var(--line);padding:22px;border-radius:10px}
.stat b{font-size:32px;display:block}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{text-align:left;padding:13px;border-bottom:1px solid var(--line);vertical-align:top}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:6px;padding:10px 14px;background:var(--blue);color:#fff;cursor:pointer;font-weight:700}
.btn.secondary{background:#6c7487}.btn.danger{background:var(--red)}
form.editor{display:grid;gap:18px;max-width:800px}
form.editor label{display:grid;gap:7px;font-weight:700}
input,textarea,select{width:100%;padding:12px;border:1px solid var(--line);border-radius:6px;background:#fff}
.checkbox-line{display:flex!important;align-items:center;gap:10px}.checkbox-line input{width:auto}
.notice{padding:12px 14px;background:#e9f7ef;border:1px solid #bfe5cf;border-radius:6px}
.error{padding:12px 14px;background:#fff1ee;border:1px solid #f5c3b9;border-radius:6px}
.login-page{min-height:100vh;display:grid;place-items:center;background:var(--blue)}
.login-card{width:min(430px,calc(100% - 30px));background:#fff;border-radius:12px;padding:30px}
.login-card form{display:grid;gap:16px}
.thumb{width:90px;height:70px;object-fit:cover;background:#eef1f6}
@media(max-width:820px){.admin-shell{grid-template-columns:1fr}.admin-sidebar{padding:18px}.admin-sidebar nav{grid-template-columns:repeat(2,1fr)}.admin-main{padding:20px}.grid{grid-template-columns:1fr}}

.category-box{border:1px solid var(--line);border-radius:6px;padding:16px;display:grid;gap:10px}.category-box legend{font-weight:800;padding:0 6px}.category-create{margin-bottom:24px}.category-create h2{margin-top:0}