/* ── Variables ────────────────────────────────────────────────────────────── */
:root {
    --color-red:      #A43220;
    --color-bluegray: #3A4245;
    --color-blue:     #1187E9;
    --color-bg:       #f0f2f5;
    --color-white:    #ffffff;
    --color-border:   #dde1e7;
    --color-text:     #212529;
    --color-muted:    #6c757d;
    --sidebar-width:  220px;
    --topbar-height:  56px;
    --card-shadow:    0 1px 4px rgba(0,0,0,.10);
    --radius:         6px;
}

/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Open Sans', sans-serif;
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-bg);
}

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

/* ── Topbar ───────────────────────────────────────────────────────────────── */
.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--topbar-height);
    background: var(--color-bluegray);
    color: var(--color-white);
    display: flex;
    align-items: center;
    padding: 0 16px;
    z-index: 100;
    gap: 12px;
}

.topbar-title {
    font-size: 15px;
    font-weight: 600;
    flex: 1;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
}

.btn-logout {
    color: var(--color-white);
    border: 1px solid rgba(255,255,255,.4);
    padding: 4px 10px;
    border-radius: var(--radius);
    font-size: 12px;
}

.btn-logout:hover {
    background: rgba(255,255,255,.15);
    text-decoration: none;
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--topbar-height));
    background: var(--color-bluegray);
    display: flex;
    flex-direction: column;
    z-index: 90;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 20px 16px 16px;
    border-right: 4px solid var(--color-red);
    margin-bottom: 8px;
}

.brand-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: .5px;
}

.sidebar-nav {
    list-style: none;
    padding: 0;
}

.sidebar-nav li { width: 100%; }

.nav-link {
    display: block;
    padding: 11px 20px;
    color: rgba(255,255,255,.80);
    font-size: 14px;
    transition: background .15s, color .15s;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255,255,255,.10);
    color: var(--color-white);
    text-decoration: none;
}

.nav-link.active {
    border-left: 3px solid var(--color-red);
    padding-left: 17px;
}

/* ── Page content ─────────────────────────────────────────────────────────── */
.page-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--topbar-height);
    padding: 24px;
    min-height: calc(100vh - var(--topbar-height));
}

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    padding: 20px 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-bluegray);
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
    display: inline-block;
    padding: 7px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    border: none;
    text-align: center;
    transition: opacity .15s;
}
.btn:hover { opacity: .88; text-decoration: none; }

.btn-primary  { background: var(--color-blue);    color: #fff; }
.btn-danger   { background: var(--color-red);     color: #fff; }
.btn-secondary{ background: var(--color-bluegray);color: #fff; }
.btn-outline  { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-sm       { padding: 4px 10px; font-size: 12px; }

/* ── Tables ───────────────────────────────────────────────────────────────── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    text-align: left;
    padding: 9px 12px;
    border-bottom: 2px solid var(--color-border);
    font-weight: 600;
    color: var(--color-muted);
    white-space: nowrap;
}

.data-table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: #f8f9fb; }

/* ── Badges ───────────────────────────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.badge-green  { background: #d4edda; color: #155724; }
.badge-amber  { background: #fff3cd; color: #856404; }
.badge-red    { background: #f8d7da; color: #721c24; }
.badge-blue   { background: #cce5ff; color: #004085; }

/* ── ID badge ─────────────────────────────────────────────────────────────── */
.id-badge {
    font-family: monospace;
    font-size: 12px;
    background: #f0f2f5;
    border: 1px solid var(--color-border);
    padding: 2px 7px;
    border-radius: 4px;
}

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-weight: 600;
    font-size: 13px;
    margin-bottom: 5px;
}

.form-control {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color .15s;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-blue);
}

/* ── Alerts ───────────────────────────────────────────────────────────────── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 16px;
}

.alert-error   { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
.alert-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.alert-info    { background: #cce5ff; color: #004085; border: 1px solid #b8daff; }

/* ── Empty state ──────────────────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-muted);
    font-size: 14px;
}

/* ── Pagination ───────────────────────────────────────────────────────────── */
.pagination {
    display: flex;
    gap: 4px;
    align-items: center;
    margin-top: 16px;
}

.pagination a,
.pagination span {
    display: inline-block;
    padding: 5px 11px;
    border-radius: var(--radius);
    font-size: 13px;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.pagination a:hover { background: var(--color-bg); text-decoration: none; }
.pagination .current { background: var(--color-blue); color: #fff; border-color: var(--color-blue); }

/* ── Login page ───────────────────────────────────────────────────────────── */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
}

.login-card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--card-shadow);
    padding: 36px 40px;
    width: 100%;
    max-width: 400px;
}

.login-brand {
    text-align: center;
    margin-bottom: 28px;
}

.login-brand h1 {
    font-size: 26px;
    font-weight: 600;
    color: var(--color-bluegray);
}

.login-brand .brand-sub {
    font-size: 13px;
    color: var(--color-muted);
    margin-top: 4px;
}

/* ── Responsive — 768px breakpoint ───────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar-toggle { display: block; }

    .sidebar {
        transform: translateX(-100%);
        transition: transform .25s ease;
    }

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

    .page-content {
        margin-left: 0;
    }

    .data-table { display: none; }
}

/* ── Admin subnav ─────────────────────────────────────────────────────────── */
.subnav {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0;
}

.subnav-link {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color .15s, border-color .15s;
}

.subnav-link:hover {
    color: var(--color-text);
    text-decoration: none;
}

.subnav-link.active {
    color: var(--color-blue);
    border-bottom-color: var(--color-blue);
}