:root{
    --primary:#047a99;
    --primary-dark:#035f77;
    --primary-soft:#e8f5f8;
    --bg:#f4f7fb;
    --card:#ffffff;
    --text:#1f2937;
    --muted:#6b7280;
    --border:#dbe4ea;
    --danger:#b42318;
    --danger-bg:#fef3f2;
    --success:#027a48;
    --success-bg:#ecfdf3;
    --radius:18px;
    --shadow:0 12px 30px rgba(15, 23, 42, 0.08);
    --sidebar-width:260px;
    --topbar-height:72px;
    --font:Arial, Helvetica, sans-serif;
}

*{
    box-sizing:border-box;
}

html, body{
    margin:0;
    padding:0;
    font-family:var(--font);
    background:var(--bg);
    color:var(--text);
}

a{
    color:var(--primary);
    text-decoration:none;
}

a:hover{
    text-decoration:none;
}

img{
    max-width:100%;
    height:auto;
}

body.admin-body{
    min-height:100vh;
}

.admin-layout{
    display:flex;
    min-height:100vh;
}

.admin-sidebar{
    width:var(--sidebar-width);
    background:#fff;
    border-right:1px solid var(--border);
    position:fixed;
    top:0;
    left:0;
    bottom:0;
    overflow-y:auto;
    z-index:1000;
}

.admin-brand{
    padding:24px 22px 18px;
    border-bottom:1px solid var(--border);
}

.admin-brand-title{
    margin:0;
    font-size:1.45rem;
    font-weight:800;
    color:var(--primary);
}

.admin-brand-subtitle{
    margin:6px 0 0;
    font-size:.92rem;
    color:var(--muted);
    line-height:1.4;
}

.admin-menu{
    padding:18px 12px;
}

.admin-menu-section{
    margin-bottom:18px;
}

.admin-menu-label{
    display:block;
    padding:8px 12px;
    font-size:.78rem;
    font-weight:700;
    text-transform:uppercase;
    letter-spacing:.04em;
    color:var(--muted);
}

.admin-menu a{
    display:flex;
    align-items:center;
    gap:10px;
    padding:12px 14px;
    margin:4px 0;
    border-radius:12px;
    color:var(--text);
    font-weight:600;
    transition:.18s ease;
}

.admin-menu a:hover{
    background:#f7fafc;
    color:var(--primary);
}

.admin-menu a.active{
    background:var(--primary-soft);
    color:var(--primary);
}

.admin-main{
    flex:1;
    margin-left:var(--sidebar-width);
    min-width:0;
}

.admin-topbar{
    height:var(--topbar-height);
    background:#fff;
    border-bottom:1px solid var(--border);
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:0 24px;
    position:sticky;
    top:0;
    z-index:900;
}

.admin-topbar-title{
    font-size:1.2rem;
    font-weight:800;
    color:var(--text);
}

.admin-topbar-user{
    display:flex;
    align-items:center;
    gap:14px;
    flex-wrap:wrap;
    color:var(--muted);
    font-size:.95rem;
}

.admin-topbar-user strong{
    color:var(--text);
}

.admin-logout{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:10px 14px;
    background:var(--primary);
    color:#fff;
    border-radius:10px;
    font-weight:700;
}

.admin-logout:hover{
    background:var(--primary-dark);
    color:#fff;
}

.admin-content{
    padding:24px;
}

.page-header{
    display:flex;
    justify-content:space-between;
    align-items:flex-start;
    gap:16px;
    margin-bottom:22px;
    flex-wrap:wrap;
}

.page-title{
    margin:0;
    font-size:1.9rem;
    font-weight:800;
}

.page-subtitle{
    margin:6px 0 0;
    color:var(--muted);
    line-height:1.5;
}

.card{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:22px;
}

.grid{
    display:grid;
    gap:18px;
}

.grid-2{
    grid-template-columns:repeat(2, minmax(0,1fr));
}

.grid-3{
    grid-template-columns:repeat(3, minmax(0,1fr));
}

.grid-4{
    grid-template-columns:repeat(4, minmax(0,1fr));
}

.kpi-card{
    background:#fff;
    border:1px solid var(--border);
    border-radius:18px;
    padding:20px;
    box-shadow:var(--shadow);
}

.kpi-label{
    font-size:.9rem;
    color:var(--muted);
    margin-bottom:10px;
}

.kpi-value{
    font-size:2rem;
    font-weight:800;
    color:var(--primary);
}

.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:11px 16px;
    border:none;
    border-radius:10px;
    font-weight:700;
    cursor:pointer;
    text-decoration:none;
    transition:.18s ease;
}

.btn-primary{
    background:var(--primary);
    color:#fff;
}

.btn-primary:hover{
    background:var(--primary-dark);
    color:#fff;
}

.btn-secondary{
    background:#fff;
    color:var(--text);
    border:1px solid var(--border);
}

.btn-secondary:hover{
    background:#f9fafb;
}

.btn-danger{
    background:var(--danger);
    color:#fff;
}

.btn-danger:hover{
    opacity:.95;
    color:#fff;
}

.form-row{
    display:grid;
    grid-template-columns:repeat(2, minmax(0,1fr));
    gap:16px;
}

.form-group{
    margin-bottom:16px;
}

label{
    display:block;
    margin-bottom:8px;
    font-weight:700;
    color:var(--text);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="number"],
select,
textarea{
    width:100%;
    padding:12px 14px;
    border:1px solid var(--border);
    border-radius:10px;
    background:#fff;
    font:inherit;
    color:var(--text);
    outline:none;
}

textarea{
    min-height:120px;
    resize:vertical;
}

input:focus,
select:focus,
textarea:focus{
    border-color:var(--primary);
    box-shadow:0 0 0 3px rgba(4,122,153,.12);
}

.help-text{
    margin-top:6px;
    font-size:.88rem;
    color:var(--muted);
}

.table-wrap{
    width:100%;
    overflow:auto;
}

.table{
    width:100%;
    border-collapse:collapse;
    background:#fff;
}

.table th,
.table td{
    padding:14px 12px;
    border-bottom:1px solid var(--border);
    text-align:left;
    vertical-align:middle;
}

.table th{
    font-size:.88rem;
    text-transform:uppercase;
    letter-spacing:.03em;
    color:var(--muted);
    background:#f9fbfc;
}

.table tr:hover td{
    background:#fcfeff;
}

.badge{
    display:inline-flex;
    align-items:center;
    padding:6px 10px;
    border-radius:999px;
    font-size:.82rem;
    font-weight:700;
}

.badge-success{
    background:var(--success-bg);
    color:var(--success);
}

.badge-muted{
    background:#eef2f6;
    color:#475467;
}

.alert{
    margin-bottom:18px;
    padding:14px 16px;
    border-radius:12px;
    border:1px solid transparent;
}

.alert-danger{
    background:var(--danger-bg);
    color:var(--danger);
    border-color:#fecdca;
}

.alert-success{
    background:var(--success-bg);
    color:var(--success);
    border-color:#abefc6;
}

.actions{
    display:flex;
    align-items:center;
    gap:10px;
    flex-wrap:wrap;
}

.admin-footer{
    padding:18px 24px 26px;
    color:var(--muted);
    font-size:.92rem;
}

.mobile-menu-toggle{
    display:none;
    border:none;
    background:#fff;
    border:1px solid var(--border);
    border-radius:10px;
    padding:10px 12px;
    cursor:pointer;
    font-weight:700;
}

@media (max-width: 1024px){
    .grid-4{
        grid-template-columns:repeat(2, minmax(0,1fr));
    }

    .grid-3{
        grid-template-columns:repeat(2, minmax(0,1fr));
    }
}

@media (max-width: 860px){
    .admin-sidebar{
        transform:translateX(-100%);
        transition:transform .2s ease;
    }

    .admin-sidebar.is-open{
        transform:translateX(0);
    }

    .admin-main{
        margin-left:0;
    }

    .mobile-menu-toggle{
        display:inline-flex;
    }

    .form-row,
    .grid-2,
    .grid-3,
    .grid-4{
        grid-template-columns:1fr;
    }

    .admin-content{
        padding:18px;
    }

    .admin-topbar{
        padding:0 16px;
    }
}