:root {
    color-scheme: dark;
    --bg: #0f172a;
    --panel: #111827;
    --panel-alt: #1f2937;
    --line: rgba(148, 163, 184, 0.18);
    --text: #e5eefb;
    --muted: #94a3b8;
    --accent: #7c3aed;
    --accent-soft: rgba(124, 58, 237, 0.14);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, system-ui, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(124, 58, 237, 0.18), transparent 30%),
        radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.18), transparent 25%),
        var(--bg);
    color: var(--text);
}

.app-shell {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    min-height: 100vh;
}

.app-sidebar {
    padding: 32px;
    border-right: 1px solid var(--line);
    background: rgba(15, 23, 42, 0.78);
    backdrop-filter: blur(16px);
}

.brand,
.app-header h2,
.card h3 {
    margin: 0;
}

.sidebar-copy,
.card p {
    color: var(--muted);
    line-height: 1.6;
}

.eyebrow {
    margin: 0 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-size: 0.72rem;
    color: #c4b5fd;
}

.sidebar-card,
.card,
.header-badge {
    border: 1px solid var(--line);
    background: rgba(17, 24, 39, 0.88);
    border-radius: 20px;
}

.sidebar-card {
    margin-top: 28px;
    padding: 20px;
}

.sidebar-card p {
    margin: 8px 0 0;
    color: #cbd5e1;
}

.app-main {
    padding: 32px;
}

.app-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    margin-bottom: 24px;
}

.header-badge {
    padding: 12px 16px;
    color: #ddd6fe;
    background: var(--accent-soft);
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.card {
    padding: 24px;
}

.hero-card {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.18), rgba(14, 165, 233, 0.08)), rgba(17, 24, 39, 0.92);
}

@media (max-width: 960px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .app-sidebar {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .grid {
        grid-template-columns: 1fr;
    }
}