:root {
    --navy: #1F3864;
    --navy-light: #2E5395;
    --gold: #C9A227;
    --gold-light: #FBEBB5;
    --gray-light: #F4F5F7;
    --gray-mid: #D9D9D9;
    --red: #C00000;
    --green: #375623;
    --border: #E3E6EA;
    --text: #1a1a1a;
    --text-muted: #6b7280;
    font-size: 15px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    background: var(--gray-light);
    color: var(--text);
}

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

/* ---------- Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 230px;
    flex-shrink: 0;
    background: var(--navy);
    color: #fff;
    display: flex;
    flex-direction: column;
}
.sidebar .brand {
    padding: 20px 18px;
    font-weight: 700;
    font-size: 16px;
    border-bottom: 1px solid rgba(255,255,255,.12);
    line-height: 1.3;
}
.sidebar .brand small { display:block; font-weight:400; opacity:.7; font-size: 12px; margin-top:4px;}
.sidebar nav { flex: 1; padding: 10px 0; }
.sidebar nav a {
    display: block;
    padding: 11px 18px;
    color: rgba(255,255,255,.85);
    font-size: 14px;
    border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,.08); text-decoration:none; }
.sidebar nav a.active {
    background: rgba(255,255,255,.12);
    border-left-color: var(--gold);
    color: #fff;
    font-weight: 600;
}
.sidebar .user-box {
    padding: 14px 18px;
    border-top: 1px solid rgba(255,255,255,.12);
    font-size: 13px;
}
.sidebar .user-box .role { color: var(--gold); font-weight: 600; }
.sidebar .user-box a { color: rgba(255,255,255,.7); font-size: 12px; }

.main { flex: 1; min-width: 0; }
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 14px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.topbar h1 { font-size: 19px; margin: 0; color: var(--navy); }
.content { padding: 24px 28px 60px; }

/* ---------- Card ---------- */
.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
    margin-bottom: 20px;
}
.card h2, .card h3 { margin-top: 0; color: var(--navy); }

/* ---------- KPI ---------- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 14px;
    margin-bottom: 22px;
}
.kpi {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
}
.kpi .label { font-size: 12.5px; color: var(--text-muted); margin-bottom: 6px; }
.kpi .value { font-size: 22px; font-weight: 700; color: var(--navy); }
.kpi .value.green { color: var(--green); }

/* ---------- Table ---------- */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td {
    padding: 9px 10px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}
th {
    background: var(--navy);
    color: #fff;
    font-weight: 600;
    position: sticky;
    top: 0;
}
tr:hover td { background: #FAFBFD; }
.table-wrap { overflow-x: auto; border-radius: 8px; border: 1px solid var(--border); }
.table-wrap table { margin: 0; border: none; }

.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: #222;
    white-space: nowrap;
}
.badge.warn { background: #F8CBAD; color: #7A2E00; }
.badge.overdue { background: #C00000; color: #fff; }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 18px; }
.form-grid.narrow { grid-template-columns: 1fr; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.span2 { grid-column: span 2; }
label { font-size: 13px; font-weight: 600; color: #374151; }
input, select, textarea {
    padding: 9px 10px;
    border: 1px solid #CBD2DB;
    border-radius: 7px;
    font-size: 14px;
    font-family: inherit;
    background: #fff;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--navy-light);
    box-shadow: 0 0 0 3px rgba(46,83,149,.15);
}
textarea { resize: vertical; min-height: 60px; }
.hint { font-size: 12px; color: var(--text-muted); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-block;
    padding: 9px 18px;
    border-radius: 7px;
    border: 1px solid transparent;
    background: var(--navy);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-align:center;
}
.btn:hover { background: var(--navy-light); text-decoration: none; color:#fff; }
.btn.secondary { background: #fff; color: var(--navy); border-color: var(--navy); }
.btn.secondary:hover { background: var(--gray-light); }
.btn.danger { background: #fff; color: var(--red); border-color: var(--red); }
.btn.danger:hover { background: #FFF0F0; }
.btn.gold { background: var(--gold); color: #3a2e00; }
.btn.small { padding: 5px 12px; font-size: 12.5px; }

/* ---------- Alerts ---------- */
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }
.alert.success { background: #E2EFDA; color: #274E13; border: 1px solid #A9D18E; }
.alert.error   { background: #FADBD8; color: #7B241C; border: 1px solid #F1948A; }
.alert.info    { background: #DDEBF7; color: #1F3864; border: 1px solid #9DC3E6; }

/* ---------- Login ---------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--navy) 0%, #13233F 100%);
}
.login-box {
    background: #fff;
    border-radius: 14px;
    padding: 38px 34px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.login-box h1 { color: var(--navy); font-size: 20px; margin-bottom: 4px; }
.login-box p.sub { color: var(--text-muted); font-size: 13px; margin-top: 0; margin-bottom: 22px; }
.login-box .field { margin-bottom: 14px; }
.login-box .btn { width: 100%; padding: 11px; font-size: 15px; margin-top: 6px; }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 6px; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.tabs a {
    padding: 9px 16px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}
.tabs a.active { color: var(--navy); border-bottom-color: var(--gold); }
.tabs a:hover { text-decoration: none; color: var(--navy); }

/* ---------- Utility ---------- */
.flex { display: flex; align-items: center; gap: 10px; }
.flex.between { justify-content: space-between; }
.mt0 { margin-top: 0; }
.text-muted { color: var(--text-muted); }
.text-right { text-align: right; }
.small { font-size: 12.5px; }
.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items:end; }
.filters .field { min-width: 160px; }

@media (max-width: 860px) {
    .app-shell { flex-direction: column; }
    .sidebar { width: 100%; }
    .form-grid { grid-template-columns: 1fr; }
    .field.span2 { grid-column: span 1; }
}