:root{
    --bg:#f6f7f9;
    --surface:#ffffff;
    --surface-soft:#f9fafb;
    --text:#171717;
    --muted:#6b7280;
    --line:#e5e7eb;
    --primary:#111827;
    --accent:#2563eb;
    --danger:#b42318;
    --success:#067647;
    --radius:14px;
    --shadow:0 1px 2px rgba(0,0,0,.04);
}

*{box-sizing:border-box}

html{font-size:16px}

body{
    margin:0;
    font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.5;
}

a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}

button,input,select,textarea{font:inherit}

.app-layout{
    min-height:100vh;
    display:grid;
    grid-template-columns:230px minmax(0,1fr);
}

.sidebar{
    background:#111827;
    color:#fff;
    padding:22px 16px;
    min-height:100vh;
    position:sticky;
    top:0;
    align-self:start;
}

.brand{
    font-weight:800;
    font-size:19px;
    margin-bottom:20px;
}

.sidebar nav{
    display:grid;
    gap:5px;
}

.sidebar nav a{
    color:#d1d5db;
    padding:10px 12px;
    border-radius:10px;
    text-decoration:none;
}

.sidebar nav a:hover,
.sidebar nav a.active{
    color:#fff;
    background:rgba(255,255,255,.10);
}

.nav-divider{
    height:1px;
    background:rgba(255,255,255,.14);
    margin:10px 0;
}

.mobile-nav-toggle{
    display:none;
}

.main{
    min-width:0;
    padding:28px;
}

.page-header{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:16px;
    margin-bottom:20px;
}

.page-header h1{
    margin:0 0 4px;
    font-size:30px;
    line-height:1.2;
}

h2{margin-top:0}
h3{margin-top:0}

.muted{color:var(--muted)}

.card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:20px;
    margin-bottom:18px;
}

.grid{
    display:grid;
    gap:16px;
}

.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))}

.metric{
    margin:0;
    font-size:34px;
    font-weight:800;
}

.metric-small{
    margin:0;
    font-size:24px;
    font-weight:800;
}

label{
    display:block;
    margin-bottom:14px;
    font-weight:600;
}

input,
select,
textarea{
    display:block;
    width:100%;
    margin-top:6px;
    padding:11px 12px;
    border:1px solid #d1d5db;
    border-radius:10px;
    background:#fff;
    color:var(--text);
}

input:focus,
select:focus,
textarea:focus{
    outline:2px solid rgba(37,99,235,.16);
    border-color:var(--accent);
}

textarea{resize:vertical}

button,
.button-link{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:42px;
    border:0;
    border-radius:10px;
    padding:10px 15px;
    background:var(--primary);
    color:#fff;
    font-weight:700;
    cursor:pointer;
    text-decoration:none;
}

button:hover,
.button-link:hover{
    opacity:.92;
    text-decoration:none;
}

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

.button-danger{
    background:var(--danger);
}

.alert{
    border-radius:10px;
    padding:12px 14px;
    margin-bottom:16px;
}

.alert-success{
    background:#ecfdf3;
    color:var(--success);
}

.alert-error{
    background:#fef3f2;
    color:var(--danger);
}

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

table{
    width:100%;
    border-collapse:collapse;
    min-width:760px;
}

th,
td{
    padding:12px 10px;
    border-bottom:1px solid var(--line);
    text-align:left;
    vertical-align:top;
}

th{
    font-size:13px;
    color:var(--muted);
    font-weight:700;
    background:var(--surface-soft);
}

.status{
    display:inline-flex;
    padding:4px 8px;
    border-radius:999px;
    background:#eef2ff;
    color:#3730a3;
    font-size:12px;
    font-weight:700;
    text-transform:capitalize;
}

.empty-state{
    padding:30px 10px;
    text-align:center;
}

.section-divider{
    border-top:1px solid var(--line);
    margin:24px 0;
}

.context-summary{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:12px;
}

.context-summary > div,
.selected-record,
.related-item{
    border:1px solid var(--line);
    border-radius:12px;
    padding:13px;
    background:var(--surface-soft);
}

.eyebrow{
    display:block;
    text-transform:uppercase;
    letter-spacing:.08em;
    font-size:11px;
    color:var(--muted);
    margin-bottom:3px;
}

.search-row{
    display:grid;
    grid-template-columns:minmax(0,1fr) auto;
    gap:10px;
    align-items:end;
}

.search-results{
    display:grid;
    gap:8px;
    margin-top:14px;
}

.search-result{
    display:flex;
    justify-content:space-between;
    gap:12px;
    padding:12px 14px;
    border:1px solid var(--line);
    border-radius:10px;
    background:#fff;
    color:var(--text);
    text-decoration:none;
}

.search-result span{
    color:var(--muted);
    font-size:14px;
}

.related-list{
    display:grid;
    gap:8px;
    margin-top:10px;
}

.related-item{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
}

.related-item span{
    color:var(--muted);
    font-size:13px;
}

@media(max-width:980px){
    .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
    .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media(max-width:760px){
    .app-layout{
        display:block;
    }

    .sidebar{
        position:relative;
        min-height:auto;
        padding:14px;
    }

    .brand{
        margin-bottom:0;
    }

    .mobile-nav-toggle{
        display:inline-flex;
        position:absolute;
        top:11px;
        right:12px;
        background:rgba(255,255,255,.10);
    }

    .sidebar nav{
        display:none;
        margin-top:14px;
    }

    body.nav-open .sidebar nav{
        display:grid;
    }

    .main{
        padding:18px 14px 30px;
    }

    .page-header{
        flex-direction:column;
    }

    .page-header > a,
    .page-header .button-link{
        width:100%;
    }

    .grid-2,
    .grid-3,
    .grid-4,
    .context-summary{
        grid-template-columns:1fr;
    }

    .search-row{
        grid-template-columns:1fr;
    }

    button,
    .button-link{
        width:100%;
    }

    .card{
        padding:16px;
    }

    table{
        min-width:680px;
    }
}