:root {
    --bg: #0f172a;
    --bg-soft: #1e293b;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --radius: 10px;
    --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .06);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: #f1f5f9;
    font-size: 15px;
    line-height: 1.5;
}

/* ── Layout ─────────────────────────────────────────────── */
.layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 240px;
    flex: 0 0 240px;
    background: var(--bg);
    color: #cbd5e1;
    padding: 20px 0;
}
.brand {
    font-weight: 700;
    font-size: 18px;
    color: #fff;
    padding: 8px 22px 22px;
    letter-spacing: .2px;
}
.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-link {
    display: block;
    padding: 10px 22px;
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    border-left: 3px solid transparent;
}
.nav-link:hover { background: var(--bg-soft); color: #fff; }
.nav-link.active { background: var(--bg-soft); color: #fff; border-left-color: var(--primary); }
.nav-link.disabled { color: #64748b; cursor: default; }
.nav-link.disabled:hover { background: transparent; color: #64748b; }
.nav-section {
    padding: 18px 22px 6px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: #475569;
}

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px;
    padding: 16px 28px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}
/* min-width:0 + ellipsis: a long title truncates instead of colliding with
   the user menu on narrow screens ("DashboardAdministrator"). */
.topbar h1 { font-size: 18px; margin: 0; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-menu { display: flex; align-items: center; gap: 14px; flex-shrink: 0; margin-left: auto; }
.user-name { color: var(--muted); font-size: 14px; }
.nav-toggle { display: none; background: none; border: 0; padding: 6px; cursor: pointer; color: var(--text); border-radius: 6px; }
.nav-toggle:hover { background: #f1f5f9; }
.nav-toggle svg { display: block; }
.sidebar-overlay { display: none; }
.content { padding: 28px; }

/* ── Cards & stats ──────────────────────────────────────── */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
}
.card h2 { margin-top: 0; font-size: 16px; }
.card.center { text-align: center; max-width: 460px; margin: 40px auto; }
.stat { text-align: left; }
.stat-value { font-size: 30px; font-weight: 700; color: var(--text); }
.stat-label { color: var(--muted); font-size: 13px; margin-top: 4px; }
.muted { color: var(--muted); }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
    display: inline-block;
    border: 1px solid transparent;
    border-radius: 8px;
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; color: var(--muted); border-color: var(--border); }
.btn-ghost:hover { color: var(--text); }
.btn-block { display: block; width: 100%; }

/* ── Login ──────────────────────────────────────────────── */
.login-body {
    display: flex; align-items: center; justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f172a, #1e293b);
}
.login-card {
    background: var(--surface);
    width: 360px;
    max-width: calc(100vw - 32px);
    padding: 32px;
    border-radius: 14px;
    box-shadow: 0 20px 40px rgba(0,0,0,.3);
    display: flex; flex-direction: column; gap: 16px;
}
.login-brand { font-size: 20px; font-weight: 700; text-align: center; margin-bottom: 6px; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.field input {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 15px;
    color: var(--text);
}
.field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }

/* ── Alerts ─────────────────────────────────────────────── */
.alert { padding: 10px 14px; border-radius: 8px; font-size: 14px; }
.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }

.alert-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; margin-bottom: 18px; }
.alert.alert-error { margin-bottom: 18px; }

/* ── Toolbar ─────────────────────────────────────────────── */
.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.toolbar .spacer { flex: 1; }
.search { display: flex; gap: 8px; flex: 1; }
.search input { flex: 1; max-width: 420px; padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }

/* ── Tables ──────────────────────────────────────────────── */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { text-align: left; color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; padding: 8px 12px; border-bottom: 1px solid var(--border); }
.table td { padding: 11px 12px; border-bottom: 1px solid #f1f5f9; vertical-align: middle; }
.table tr:last-child td { border-bottom: none; }
.table td.right, .table th.right { text-align: right; }
.table a { color: var(--primary); text-decoration: none; }
.table a:hover { text-decoration: underline; }

.tag { display: inline-block; background: #eef2ff; color: #4338ca; border-radius: 6px; padding: 2px 8px; font-size: 12px; font-weight: 600; }
.badge { display: inline-block; border-radius: 999px; padding: 2px 10px; font-size: 12px; font-weight: 600; }
.badge-ok { background: #dcfce7; color: #15803d; }
.badge-warn { background: #fef3c7; color: #b45309; }

/* ── Page header ─────────────────────────────────────────── */
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.page-title { margin: 0; font-size: 20px; }
.page-sub { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

/* ── Forms ───────────────────────────────────────────────── */
.form-card { max-width: 760px; padding: 0; overflow: hidden; }
.fieldset { display: grid; grid-template-columns: 220px 1fr; gap: 24px; padding: 24px; border-bottom: 1px solid var(--border); }
.fieldset:last-of-type { border-bottom: none; }
.fieldset-head h3 { margin: 0 0 4px; font-size: 15px; }
.fieldset-head p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.45; }
.fieldset-body { min-width: 0; }
.fieldset-body .field:last-child { margin-bottom: 0; }
.form-row { display: flex; gap: 16px; }
.form-row .field { flex: 1; min-width: 0; }
.field { margin-bottom: 16px; }
.field > span { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; color: #334155; }
.req { color: var(--danger); font-style: normal; }
.field-hint { color: var(--muted); font-size: 13px; line-height: 1.45; margin: 10px 0 0; }
.field-hint a { color: var(--primary); }

/* highlighted opt-in box */
.toggle-box { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; background: #f8fafc; border: 1px solid var(--border); border-radius: 10px; cursor: pointer; }
.toggle-box input { margin-top: 3px; }
.toggle-box span { display: flex; flex-direction: column; gap: 3px; }
.toggle-box small { color: var(--muted); font-size: 12.5px; line-height: 1.45; }

.form-card .form-actions { margin: 0; padding: 18px 24px; background: #f8fafc; border-top: 1px solid var(--border); }
.field select, .field textarea, .field input[type=text], .field input[type=email], .field input[type=url] {
    padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; color: var(--text); width: 100%; font-family: inherit;
}
.field select:focus, .field textarea:focus, .field input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
.check { display: flex; align-items: center; gap: 8px; margin: 4px 0 16px; font-size: 14px; }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 8px; flex-wrap: wrap; }

/* ── Detail / profile ────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
.detail { display: grid; grid-template-columns: 130px 1fr; gap: 8px 16px; margin: 0; font-size: 14px; }
.detail dt { color: var(--muted); }
.detail dd { margin: 0; }
.keybox { display: flex; align-items: center; gap: 10px; background: #f8fafc; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; margin-bottom: 16px; }
.keybox code { font-size: 13px; word-break: break-all; flex: 1; }

@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }
@media (max-width: 720px) {
    /* Sidebar becomes an off-canvas drawer behind a hamburger button —
       the old 64px font-size:0 strip was illegible and unusable. */
    .sidebar {
        position: fixed; top: 0; bottom: 0; left: 0; z-index: 40;
        width: 240px; flex-basis: 240px;
        transform: translateX(-100%);
        transition: transform .2s ease;
        overflow-y: auto;
    }
    body.nav-open .sidebar { transform: translateX(0); }
    body.nav-open .sidebar-overlay {
        display: block; position: fixed; inset: 0; z-index: 30;
        background: rgba(15, 23, 42, .5);
    }
    .nav-toggle { display: inline-flex; }
    .topbar { padding: 12px 16px; }
    .content { padding: 16px; }
    .form-row { flex-direction: column; gap: 0; }
    .fieldset { grid-template-columns: 1fr; gap: 14px; padding: 18px; }
}