:root {
    --color-bg:          #0f1117;
    --color-surface:     #1a1d27;
    --color-surface-2:   #21253a;
    --color-border:      #2a2f45;
    --color-primary:     #4f8ef7;
    --color-primary-h:   #3a7aed;
    --color-success:     #34c47c;
    --color-warning:     #f5a623;
    --color-danger:      #e05a5a;
    --color-text:        #e2e6f0;
    --color-text-muted:  #6b7394;
    --color-sidebar:     #13151f;
    --sidebar-width:     240px;
    --topbar-height:     60px;
    --radius:            8px;
    --shadow:            0 2px 12px rgba(0,0,0,.35);
    --font:              'Segoe UI', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
    line-height: 1.6;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-h); }

/* ── Layout ─────────────────────────────────────────── */
.app-wrapper {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-sidebar);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
}

.sidebar-logo {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo .brand {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: .5px;
}

.sidebar-logo .brand span {
    color: var(--color-text-muted);
    font-weight: 400;
    font-size: 11px;
    display: block;
    margin-top: 2px;
}

.sidebar-nav {
    padding: 12px 0;
    flex: 1;
}

.nav-section {
    padding: 16px 16px 6px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 20px;
    color: var(--color-text-muted);
    font-size: 13.5px;
    transition: background .15s, color .15s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

.nav-item.active {
    background: rgba(79,142,247,.1);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.nav-item svg { flex-shrink: 0; opacity: .7; }
.nav-item.active svg { opacity: 1; }

.sidebar-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--color-border);
    font-size: 12px;
    color: var(--color-text-muted);
}

/* ── Main area ───────────────────────────────────────── */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ── Topbar ──────────────────────────────────────────── */
.topbar {
    height: var(--topbar-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    flex-shrink: 0;
}

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

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--color-text-muted);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    color: #fff;
}

/* ── Content ─────────────────────────────────────────── */
.content {
    flex: 1;
    overflow-y: auto;
    padding: 28px 32px;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 20px;
    font-weight: 600;
}

/* ── Cards ───────────────────────────────────────────── */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 20px;
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 18px 20px;
}

.stat-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: background .15s, opacity .15s;
    font-family: var(--font);
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: var(--color-primary-h); color: #fff; }

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover { opacity: .85; }

.btn-secondary {
    background: var(--color-surface-2);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.btn-secondary:hover { background: var(--color-border); }

.btn-sm { padding: 5px 10px; font-size: 12px; }

/* ── Tables ──────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}

thead th {
    text-align: left;
    padding: 10px 14px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
}

tbody td {
    padding: 11px 14px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(255,255,255,.02); }

.actions { display: flex; gap: 6px; }

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

label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: .4px;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="url"],
input[type="number"],
select,
textarea {
    width: 100%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    font-size: 14px;
    font-family: var(--font);
    padding: 9px 12px;
    transition: border-color .15s;
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--color-primary);
}

select option { background: var(--color-surface); }
textarea { resize: vertical; min-height: 90px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-hint {
    font-size: 11px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ── Alerts ──────────────────────────────────────────── */
.alert {
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 16px;
    border-left: 3px solid;
}

.alert-success {
    background: rgba(52,196,124,.1);
    border-color: var(--color-success);
    color: var(--color-success);
}

.alert-danger {
    background: rgba(224,90,90,.1);
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.alert-warning {
    background: rgba(245,166,35,.1);
    border-color: var(--color-warning);
    color: var(--color-warning);
}

/* ── Badges ──────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.badge-success { background: rgba(52,196,124,.15); color: var(--color-success); }
.badge-danger  { background: rgba(224,90,90,.15);  color: var(--color-danger); }
.badge-primary { background: rgba(79,142,247,.15); color: var(--color-primary); }
.badge-muted   { background: var(--color-surface-2); color: var(--color-text-muted); }

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

.login-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}

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

.login-logo .brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
}

.login-logo .sub {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ── Misc ────────────────────────────────────────────── */
.text-muted   { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-danger  { color: var(--color-danger); }
.text-primary { color: var(--color-primary); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mono { font-family: 'Cascadia Code', 'Consolas', monospace; font-size: 12px; }

.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-muted);
}

.empty-state h3 { margin-bottom: 8px; color: var(--color-text); }

.divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 20px 0;
}