:root {
    --radius: 16px;
    --brand: #2563eb; /* primary */
    --brand-2: #7c3aed; /* accent */
    --bg: #f6f7fb;
    --card: #ffffff;
    --muted: #6b7280;
    --shadow: 0 8px 30px rgba(0,0,0,.06);
}

html, body {
    height: 100%
}

body {
    font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: var(--bg);
    color: #1f2937
}

/* dark mode */
html[data-bs-theme="dark"] {
    --bg: #101216;
    --card: #141821;
    --muted: #9aa3af;
    --shadow: 0 10px 30px rgba(0,0,0,.35);
}

.bg-soft {
    background: rgba(0,0,0,.05);
}

html[data-bs-theme="dark"] .bg-soft {
    background: rgba(255,255,255,.06);
}

.soft-scrollbars {
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,.2) transparent;
}

html[data-bs-theme="dark"] .soft-scrollbars {
    scrollbar-color: rgba(255,255,255,.15) transparent;
}

/* Glass */
.glass {
    background: var(--card); /* fallback compatibile */
    backdrop-filter: saturate(140%) blur(12px);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* Topbar */
.topbar .app-brand .brand-mark {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.25);
}

.btn-icon {
    border: 0;
    background: transparent
}

.btn-avatar {
    border: 0;
    background: transparent
}

    .btn-avatar .avatar {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        display: inline-grid;
        place-items: center;
        background: linear-gradient(135deg,#e2e8f0,#fff);
        color: #111;
        font-weight: 700;
    }

html[data-bs-theme="dark"] .btn-avatar .avatar {
    background: linear-gradient(135deg,#1f2430,#131720);
    color: #fff;
}

/* App shell */
.app-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 20px;
    padding: 18px
}

@media (max-width: 991.98px) {
    .app-shell {
        grid-template-columns: 1fr
    }
}

.sidebar {
    position: sticky;
    top: 90px;
    height: calc(100vh - 110px);
    padding: 12px;
    overflow: auto;
}

@media (max-width: 991.98px) {
    .sidebar {
        position: fixed;
        inset: 64px 0 0 0;
        transform: translateX(-100%);
        transition: transform .22s ease;
    }

        .sidebar.open {
            transform: translateX(0);
            z-index: 1050;
        }
}

.sidebar-inner {
    display: flex;
    flex-direction: column;
    gap: 10px
}

.sidebar-section {
    background: transparent;
    border-radius: 12px
}

.sidebar-title {
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--muted);
    margin: 8px 12px
}

.nav-item, .nav-subitem {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    text-decoration: none;
    color: inherit;
}

    .nav-item:hover {
        background: rgba(0,0,0,.04)
    }

html[data-bs-theme="dark"] .nav-item:hover {
    background: rgba(255,255,255,.04)
}

.nav-item i {
    opacity: .85
}

.nav-subitem {
    margin-left: 36px;
    font-size: .95rem;
    color: var(--muted)
}

    .nav-subitem:hover {
        color: inherit;
    }

.has-chevron {
    width: 100%;
    background: transparent;
    border: 0
}

/* Content */
.app-content {
    min-height: calc(100vh - 110px);
}

/* Hero */
.hero {
    background: linear-gradient(120deg, color-mix(in oklab, var(--brand) 16%, transparent), transparent), var(--card);
}

/* Metric cards */
.metric-card {
    padding: 18px 18px;
    border-radius: 20px;
    color: #fff;
    box-shadow: var(--shadow);
}

.metric-title {
    opacity: .85;
    font-size: .95rem
}

.metric-value {
    font-size: 2rem;
    font-weight: 800;
    margin-top: 4px
}

.gradient-1 {
    background: linear-gradient(135deg,#4f46e5,#06b6d4)
}

.gradient-2 {
    background: linear-gradient(135deg,#7c3aed,#db2777)
}

.gradient-3 {
    background: linear-gradient(135deg,#16a34a,#22c55e)
}

.gradient-4 {
    background: linear-gradient(135deg,#f59e0b,#ef4444)
}

/* Cards override */
.card {
    border: 0;
    border-radius: 18px;
    background: var(--card);
    box-shadow: var(--shadow);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0,0,0,.06)
}

html[data-bs-theme="dark"] .card-header {
    border-color: rgba(255,255,255,.08)
}

/* Auth */
.auth-bg {
    background: radial-gradient(1200px 400px at -20% -10%, #60a5fa22, transparent), radial-gradient(800px 400px at 120% 10%, #a78bfa22, transparent), linear-gradient(180deg, var(--bg), var(--bg));
}

.auth-poster {
    background: radial-gradient(1200px 600px at 60% 50%, #1d4ed8 0, #7c3aed 55%, #111827 120%);
}

.auth-card {
    max-width: 480px;
}

.brand-mark {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.lift {
    transition: transform .15s ease, box-shadow .15s ease
}

    .lift:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 30px rgba(0,0,0,.12)
    }