/* ===== STSV - Giao diện quản trị ===== */
:root{
  --primary:#0b4f9c;--primary-dark:#083a73;--primary-light:#e8f1fb;
  --text:#1f2937;--muted:#6b7280;--line:#e5e7eb;--bg:#eef1f6;--card:#fff;
  --green:#16a34a;--red:#dc2626;--radius:10px;
  --shadow:0 1px 3px rgba(16,24,40,.08);
}
*{box-sizing:border-box}
body{margin:0;font-family:'Segoe UI',system-ui,-apple-system,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg);font-size:15px;line-height:1.55}
a{color:var(--primary);text-decoration:none}
.muted{color:var(--muted)}
h3{margin:0}

/* ---- Login ---- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#0b4f9c,#083a73);padding:20px}
.login-box{background:#fff;border-radius:16px;box-shadow:0 20px 50px rgba(0,0,0,.25);padding:34px;width:100%;max-width:400px}
.login-head{text-align:center;margin-bottom:18px}
.login-logo{display:inline-block;background:var(--primary);color:#fff;font-weight:800;font-size:20px;padding:10px 16px;border-radius:12px;letter-spacing:1px}
.login-logo-img{background:#fff;padding:8px;box-shadow:0 2px 8px rgba(0,0,0,.12)}
.login-logo-img img{width:64px;height:64px;object-fit:contain;display:block}
.login-head h1{font-size:20px;margin:14px 0 2px;color:var(--primary-dark)}
.login-head p{margin:0;color:var(--muted);font-size:14px}
.login-form label{display:block;margin-bottom:14px;font-size:14px;font-weight:600;color:#374151}
.login-form input{width:100%;margin-top:6px;padding:11px 13px;border:1px solid var(--line);border-radius:8px;font-size:15px;font-weight:400}
.login-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.login-foot{text-align:center;margin:16px 0 0;font-size:14px}
.btn-block{width:100%;display:block}

/* ---- Shell ---- */
.admin-shell{display:flex;min-height:100vh}
.admin-sidebar{width:248px;background:#0e1b2e;color:#cbd5e1;display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:40}
.admin-brand{display:flex;align-items:center;gap:10px;padding:18px 18px;color:#fff;font-weight:700;border-bottom:1px solid #1e2a3d}
.admin-logo{background:var(--primary);padding:6px 10px;border-radius:8px;font-weight:800;letter-spacing:1px}
.admin-nav{flex:1;padding:12px 10px;overflow:auto}
.admin-nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:8px;color:#cbd5e1;margin-bottom:3px;font-size:14.5px}
.admin-nav a:hover{background:#17273d;color:#fff}
.admin-nav a.active{background:var(--primary);color:#fff;font-weight:600}
.admin-nav .ico{width:22px;text-align:center}
.nav-group{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:#64748b;margin:16px 12px 6px}
.admin-side-foot{padding:14px 18px;border-top:1px solid #1e2a3d}
.admin-side-foot a{color:#93c5fd;font-size:14px}

.admin-main{flex:1;margin-left:248px;display:flex;flex-direction:column;min-width:0}
.admin-top{display:flex;align-items:center;gap:14px;background:#fff;padding:12px 24px;box-shadow:var(--shadow);position:sticky;top:0;z-index:30}
.admin-toggle{display:none;background:none;border:0;font-size:22px;cursor:pointer}
.admin-page-title{font-size:18px;margin:0;color:var(--primary-dark)}
.admin-user{margin-left:auto;display:flex;align-items:center;gap:12px}
.au-info{text-align:right;line-height:1.2}
.au-info strong{display:block;font-size:14px}
.au-info small{color:var(--muted);font-size:12px}
.au-menu{position:relative}
.au-btn{width:40px;height:40px;border-radius:50%;border:0;background:var(--primary);color:#fff;font-weight:700;cursor:pointer;font-size:16px}
.au-drop{position:absolute;right:0;top:48px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 25px rgba(0,0,0,.12);min-width:170px;display:none;overflow:hidden}
.au-drop.open{display:block}
.au-drop a{display:block;padding:11px 16px;color:var(--text);font-size:14px}
.au-drop a:hover{background:var(--primary-light)}
.admin-content{padding:24px;max-width:1100px;width:100%}

/* ---- Alerts ---- */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:18px;font-size:14.5px}
.alert-success{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}
.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}

/* ---- Dashboard ---- */
.welcome h2{margin:0 0 4px;color:var(--primary-dark)}
.welcome{margin-bottom:20px}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;border-left:4px solid var(--primary)}
.stat-num{display:block;font-size:30px;font-weight:800;color:var(--primary-dark)}
.stat-label{color:var(--muted);font-size:13.5px}
.dash-cols{display:grid;grid-template-columns:1fr;gap:20px}

/* ---- Panels & tables ---- */
.panel{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:20px}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line)}
.panel-head h3{font-size:16px;color:var(--primary-dark)}
.pad{padding:18px}
.adm-table{width:100%;border-collapse:collapse}
.adm-table th{text-align:left;font-size:12.5px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);padding:12px 16px;background:#f9fafb;border-bottom:1px solid var(--line)}
.adm-table td{padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
.adm-table tr:last-child td{border-bottom:0}
.adm-table tr:hover td{background:#fafbff}
.row-title{font-weight:600}
.row-sub{font-size:12.5px;margin-top:2px}
.row-actions{white-space:nowrap;display:flex;gap:12px;align-items:center}
.row-actions form{display:inline}
.cat-icon{margin-right:6px}

.link{background:none;border:0;color:var(--primary);cursor:pointer;font-size:14px;padding:0;font-family:inherit}
.link:hover{text-decoration:underline}
.link-danger{color:var(--red)}

.badge{display:inline-block;font-size:12px;padding:2px 9px;border-radius:999px;font-weight:600}
.badge-green{background:#dcfce7;color:#166534}
.badge-gray{background:#f1f5f9;color:#475569}
.badge-blue{background:var(--primary-light);color:var(--primary-dark)}
.badge-red{background:#fee2e2;color:#991b1b}

.log-list{list-style:none;margin:0;padding:8px 0}
.log-list li{padding:8px 18px;border-bottom:1px dashed var(--line);font-size:13.5px}
.log-list li:last-child{border-bottom:0}
.log-action{font-weight:700;color:var(--primary)}
.log-entity{color:var(--text)}
.log-detail{color:var(--muted)}
.log-meta{display:block;color:var(--muted);font-size:12px;margin-top:2px}

/* ---- Toolbar ---- */
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.filters input,.filters select{padding:9px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px}

/* ---- Buttons ---- */
.btn-primary{background:var(--primary);color:#fff;border:0;padding:10px 18px;border-radius:8px;font-weight:600;cursor:pointer;font-size:14.5px;display:inline-block;text-align:center}
.btn-primary:hover{background:var(--primary-dark);text-decoration:none}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--text);padding:10px 18px;border-radius:8px;font-weight:600;cursor:pointer;font-size:14.5px;display:inline-block;text-align:center}
.btn-ghost:hover{background:#f3f4f6;text-decoration:none}
.btn-sm{background:var(--primary);color:#fff;padding:7px 13px;border-radius:7px;font-size:13.5px;font-weight:600;border:0;cursor:pointer}
.btn-sm:hover{background:var(--primary-dark);text-decoration:none}

.empty-state{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:48px 24px;text-align:center}
.empty-state p{color:var(--muted);margin-bottom:16px}

/* ---- Forms ---- */
.form-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.form-card.narrow{max-width:820px}
.form-grid{display:grid;grid-template-columns:1fr 300px;gap:24px;align-items:start}
.field{display:block;margin-bottom:16px}
.field-label{display:block;font-weight:600;font-size:14px;margin-bottom:6px;color:#374151}
.field-label em{color:var(--red);font-style:normal}
.field input,.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:14.5px;font-family:inherit;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.field input:disabled{background:#f3f4f6;color:var(--muted)}
.field textarea{resize:vertical}
.has-error{border-color:var(--red)!important}
.err{display:block;color:var(--red);font-size:13px;margin-top:4px}
.field-row{display:flex;gap:16px}
.field-row .field{flex:1}
.field-sm{max-width:140px}
.hint{font-size:13px;color:var(--muted);margin:0 0 10px}
.check{display:flex;align-items:center;gap:8px;font-size:14.5px;margin-bottom:8px;cursor:pointer}
.check input{width:auto}
.check-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:4px 16px;background:#f9fafb;padding:14px;border-radius:8px;border:1px solid var(--line)}
.form-actions{display:flex;gap:10px;margin-top:8px}
.form-sub{margin:18px 0 12px;color:var(--primary-dark);font-size:15px;border-top:1px solid var(--line);padding-top:16px}
.color-row{display:flex;gap:8px;align-items:center}
.color-row input[type=color]{width:48px;padding:2px;height:42px}

/* Form aside (page editor) */
.form-main{min-width:0}
.aside-box{background:#f9fafb;border:1px solid var(--line);border-radius:10px;padding:16px;margin-bottom:16px}
.aside-box h3{font-size:14px;color:var(--primary-dark);margin-bottom:10px}
.aside-box h3 em{color:var(--red);font-style:normal}
.aside-actions{margin-top:14px;display:grid;gap:8px}
.view-link{display:inline-block;margin-top:12px;font-size:13.5px}
.meta-box p{margin:4px 0;font-size:13px;color:var(--muted)}
.meta-box .slug{word-break:break-all}

/* Ảnh đại diện */
.img-preview{width:100%;aspect-ratio:16/10;border:1px dashed var(--line);border-radius:8px;background:#f9fafb;
  display:flex;align-items:center;justify-content:center;overflow:hidden;margin-bottom:8px;color:var(--muted);font-size:13px}
.img-preview img{width:100%;height:100%;object-fit:cover}
.upload-btn{cursor:pointer;margin-top:8px;text-align:center}

/* ---- Media ---- */
.upload-form{display:flex;gap:10px;align-items:center}
.media-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.media-item{margin:0;background:#fff;border-radius:10px;box-shadow:var(--shadow);overflow:hidden}
.media-thumb{height:140px;display:flex;align-items:center;justify-content:center;background:#f1f5f9;overflow:hidden}
.media-thumb img{width:100%;height:100%;object-fit:cover}
.file-ext{font-weight:800;color:var(--primary);font-size:22px}
.media-item figcaption{padding:10px 12px}
.media-name{display:block;font-size:13.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.media-meta{display:block;font-size:12px;color:var(--muted);margin:2px 0 8px}
.media-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.media-actions form{display:inline}
.copy-url{width:100%;font-size:12px;padding:5px 7px;border:1px solid var(--line);border-radius:6px;color:var(--muted)}

/* ---- Responsive ---- */
.admin-backdrop{display:none}
@media (max-width:900px){
  .admin-sidebar{transform:translateX(-100%);transition:transform .25s}
  body.admin-nav-open .admin-sidebar{transform:translateX(0)}
  body.admin-nav-open .admin-backdrop{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:35}
  .admin-main{margin-left:0}
  .admin-toggle{display:block}
  .form-grid{grid-template-columns:1fr}
  .field-row{flex-direction:column;gap:0}
}