:root {
    --navy: #060d1a;
    --navy-2: #0a1730;
    --navy-3: #0e2145;
    --navy-soft: #132844;
    --sky: #3BA3E0;
    --sky-dim: rgba(59, 163, 224, 0.14);
    --orange: #F36C1A;
    --orange-dim: rgba(243, 108, 26, 0.16);
    --gold: #e8b84a;
    --paper: #0c1524;
    --surface: #111c2e;
    --surface-2: #152338;
    --surface-3: #1a2b44;
    --ink: #e8eef7;
    --muted: #8b9bb3;
    --border: rgba(232, 238, 247, 0.08);
    --border-strong: rgba(232, 238, 247, 0.14);
    --success: #3ecf8e;
    --danger: #f07178;
    --warn: #e8b84a;
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    --radius: 12px;
    --radius-sm: 8px;
    --sidebar-w: 260px;
    --font: 'DM Sans', system-ui, sans-serif;
    --display: 'Syne', system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--font);
    background:
        radial-gradient(900px 480px at 12% -10%, rgba(59, 163, 224, 0.12), transparent 55%),
        radial-gradient(700px 420px at 100% 0%, rgba(243, 108, 26, 0.08), transparent 50%),
        var(--paper);
    display: flex;
    min-height: 100vh;
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--sky); }

/* ——— Sidebar ——— */
.admin-sidebar {
    width: var(--sidebar-w);
    background: linear-gradient(180deg, var(--navy-2) 0%, var(--navy) 100%);
    color: #fff;
    padding: 1.25rem 0.85rem 1rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; bottom: 0; left: 0;
    border-right: 1px solid var(--border);
    z-index: 40;
}

.admin-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin: 0 0.4rem 1.25rem;
    font-family: var(--display);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.admin-brand img {
    height: 34px;
    width: auto;
    filter: drop-shadow(0 4px 12px rgba(59, 163, 224, 0.35));
}

.admin-brand span {
    font-size: 0.95rem;
    background: linear-gradient(115deg, #fff 20%, var(--sky) 120%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.admin-brand-meta {
    display: block;
    font-family: var(--font);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 0.1rem;
}

.admin-nav-scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 0.15rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,.15) transparent;
}

.nav-group {
    margin-bottom: 0.85rem;
}

.nav-group-label {
    display: block;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,.35);
    padding: 0.35rem 0.85rem 0.4rem;
}

.admin-sidebar nav a {
    display: block;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,.68);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background .15s, color .15s, transform .15s;
    border: 1px solid transparent;
}

.admin-sidebar nav a:hover {
    background: rgba(255,255,255,.06);
    color: #fff;
}

.admin-sidebar nav a.active {
    background: linear-gradient(105deg, rgba(243,108,26,.22), rgba(59,163,224,.12));
    color: #fff;
    border-color: rgba(243,108,26,.25);
    box-shadow: inset 3px 0 0 var(--orange);
}

.admin-user {
    font-size: 0.8rem;
    color: rgba(255,255,255,.5);
    border-top: 1px solid var(--border);
    padding: 0.9rem 0.65rem 0.25rem;
    margin-top: 0.5rem;
}

.admin-user p {
    margin: 0 0 0.45rem;
    color: rgba(255,255,255,.85);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.admin-user-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.85rem;
}

.admin-user a {
    color: var(--sky);
    text-decoration: none;
    font-size: 0.78rem;
}

.admin-user a:hover { color: #fff; }

/* ——— Main ——— */
.admin-main {
    margin-left: var(--sidebar-w);
    flex: 1;
    padding: 1.75rem 2rem 3rem;
    min-width: 0;
}

.admin-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.admin-header h1 {
    font-family: var(--display);
    margin: 0;
    font-size: clamp(1.45rem, 2.2vw, 1.85rem);
    letter-spacing: -0.03em;
    font-weight: 700;
}

.admin-header-sub {
    margin: 0.25rem 0 0;
    font-size: 0.85rem;
    color: var(--muted);
}

/* ——— Stats ——— */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.85rem;
    margin-bottom: 1.75rem;
}

.stat-card {
    background: linear-gradient(160deg, var(--surface-2), var(--surface));
    border-radius: var(--radius);
    padding: 1.15rem 1.2rem;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    inset: auto -20% -40% auto;
    width: 90px;
    height: 90px;
    background: radial-gradient(circle, var(--sky-dim), transparent 70%);
    pointer-events: none;
}

.stat-card strong {
    display: block;
    font-size: 1.7rem;
    font-family: var(--display);
    color: #fff;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.stat-card span {
    font-size: 0.8rem;
    color: var(--muted);
    font-weight: 500;
}

/* ——— Tables / DataTable ——— */
.table-wrap {
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.dt-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem 1rem;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,.02);
}

.dt-search {
    flex: 1 1 200px;
    min-width: 160px;
    position: relative;
}

.dt-search input {
    width: 100%;
    padding: 0.55rem 0.85rem 0.55rem 2.15rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--navy-2);
    color: var(--ink);
    font: inherit;
    font-size: 0.875rem;
}

.dt-search input::placeholder { color: var(--muted); }
.dt-search input:focus {
    outline: none;
    border-color: rgba(59,163,224,.5);
    box-shadow: 0 0 0 3px rgba(59,163,224,.15);
}

.dt-search::before {
    content: '';
    position: absolute;
    left: 0.75rem;
    top: 50%;
    width: 14px;
    height: 14px;
    transform: translateY(-50%);
    background: no-repeat center / contain;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' stroke='%238b9bb3' stroke-width='2' viewBox='0 0 24 24'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='M20 20l-3.5-3.5'/%3E%3C/svg%3E");
    opacity: 0.9;
    pointer-events: none;
}

.dt-meta {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: var(--muted);
    font-size: 0.8rem;
}

.dt-meta select {
    padding: 0.4rem 0.55rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-strong);
    background: var(--navy-2);
    color: var(--ink);
    font: inherit;
    font-size: 0.8rem;
}

.dt-scroll {
    overflow: auto;
    max-width: 100%;
    max-height: min(70vh, 720px);
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.875rem;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

thead th {
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--surface-3);
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    white-space: nowrap;
    border-bottom: 1px solid var(--border-strong);
    user-select: none;
}

table.js-datatable thead th.dt-sortable {
    cursor: pointer;
}

table.js-datatable thead th.dt-sortable:hover {
    color: var(--ink);
}

table.js-datatable thead th.dt-sorted-asc::after,
table.js-datatable thead th.dt-sorted-desc::after {
    content: '';
    display: inline-block;
    margin-left: 0.35rem;
    border: 4px solid transparent;
    vertical-align: middle;
}

table.js-datatable thead th.dt-sorted-asc::after {
    border-bottom-color: var(--sky);
    margin-top: -4px;
}

table.js-datatable thead th.dt-sorted-desc::after {
    border-top-color: var(--sky);
    margin-top: 4px;
}

tbody tr:nth-child(even) { background: rgba(255,255,255,.015); }
tbody tr:hover { background: rgba(59, 163, 224, 0.06); }
tbody tr:last-child td { border-bottom: 0; }

td.dt-num, th.dt-num { text-align: right; font-variant-numeric: tabular-nums; }

.dt-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--muted);
    background: rgba(0,0,0,.15);
}

.dt-pager {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.dt-pager button {
    min-width: 2rem;
    height: 2rem;
    padding: 0 0.55rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-strong);
    background: var(--navy-2);
    color: var(--ink);
    font: inherit;
    font-size: 0.8rem;
    cursor: pointer;
}

.dt-pager button:hover:not(:disabled) {
    border-color: rgba(59,163,224,.45);
    color: #fff;
}

.dt-pager button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.dt-pager button.dt-page-active {
    background: var(--orange-dim);
    border-color: rgba(243,108,26,.4);
    color: #fff;
}

.dt-empty {
    padding: 2.5rem 1.25rem;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
}

.dt-row-hidden { display: none !important; }

/* ——— Buttons / forms / alerts ——— */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    font-family: inherit;
    transition: transform .12s, background .15s, border-color .15s;
    background: var(--surface-3);
    color: var(--ink);
    border-color: var(--border-strong);
}

.btn:hover { transform: translateY(-1px); border-color: rgba(59,163,224,.35); }
.btn-primary {
    background: linear-gradient(120deg, var(--orange), #ff8a3d);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 6px 18px rgba(243,108,26,.25);
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.78rem; }
.btn-danger {
    background: rgba(240,113,120,.15);
    color: #ffb4b8;
    border-color: rgba(240,113,120,.3);
}
.btn-success {
    background: rgba(62,207,142,.14);
    color: #8dffc6;
    border-color: rgba(62,207,142,.3);
}

.form-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.35rem 1.5rem;
    border: 1px solid var(--border);
    max-width: 680px;
    margin-bottom: 1.75rem;
    box-shadow: var(--shadow);
}

.form-card h3 {
    margin: 0 0 1rem;
    font-family: var(--display);
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.8rem;
    margin-bottom: 0.35rem;
    color: rgba(232,238,247,.85);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.6rem 0.85rem;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--navy-2);
    color: var(--ink);
    font: inherit;
    font-size: 0.9rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: rgba(59,163,224,.5);
    box-shadow: 0 0 0 3px rgba(59,163,224,.12);
}

.form-group small { color: var(--muted); display: block; margin-top: 0.3rem; font-size: 0.78rem; }

.alert {
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    border: 1px solid transparent;
    font-size: 0.9rem;
}
.alert-success {
    background: rgba(62,207,142,.12);
    color: #9dffc9;
    border-color: rgba(62,207,142,.25);
}
.alert-error {
    background: rgba(240,113,120,.12);
    color: #ffb4b8;
    border-color: rgba(240,113,120,.28);
}

.badge {
    display: inline-block;
    padding: 0.18rem 0.5rem;
    border-radius: 6px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}
.badge-pending { background: rgba(232,184,74,.15); color: #f0d48a; }
.badge-approved { background: rgba(62,207,142,.15); color: #8dffc6; }
.badge-rejected { background: rgba(240,113,120,.15); color: #ffb4b8; }

.empty-state {
    padding: 2.75rem 1.5rem;
    text-align: center;
    color: var(--muted);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
    background: rgba(255,255,255,.02);
}
.empty-state strong {
    display: block;
    color: var(--ink);
    font-family: var(--display);
    font-size: 1.05rem;
    margin-bottom: 0.35rem;
}

h2.section-title {
    font-family: var(--display);
    font-size: 1.1rem;
    margin: 1.75rem 0 0.75rem;
    letter-spacing: -0.02em;
}

/* Login page compatibility */
.login-wrap {
    min-height: 100vh;
    width: 100%;
    display: grid;
    place-items: center;
    padding: 2rem;
}

@media (max-width: 900px) {
    .admin-sidebar {
        width: 100%;
        position: relative;
        max-height: none;
        padding: 1rem;
        border-right: 0;
        border-bottom: 1px solid var(--border);
    }
    .admin-nav-scroll {
        overflow: visible;
    }
    .admin-sidebar .nav-group {
        margin-bottom: 0.5rem;
    }
    .nav-group-label { display: none; }
    .admin-sidebar nav {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 0.35rem;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0.35rem;
    }
    .admin-sidebar nav a {
        flex: 0 0 auto;
        white-space: nowrap;
        padding: 0.5rem 0.8rem;
    }
    .admin-brand { margin-bottom: 0.75rem; }
    .admin-user { border-top: 0; padding-top: 0.5rem; }
    .admin-main { margin-left: 0; padding: 1rem 1rem 2rem; }
    .admin-header h1 { font-size: 1.35rem; }
    body { flex-direction: column; }
    .stats-row { grid-template-columns: 1fr 1fr; }
    .form-grid { grid-template-columns: 1fr !important; }
    .dt-scroll table { min-width: 560px; }
}

@media (max-width: 520px) {
    .stats-row { grid-template-columns: 1fr; }
    .dt-toolbar { flex-direction: column; align-items: stretch; }
}