:root {
    --lumka-primary: #1f3a5f;
    --lumka-primary-dark: #162a45;
    --lumka-sidebar-bg: #ffffff;
    --lumka-border: #e5e7eb;
    --lumka-text: #111827;
    --lumka-muted: #6b7280;
    --lumka-hover: #f3f6fb;
    --lumka-active: #e8f0fe;
}

.lumka-header {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    background: var(--lumka-primary);
    color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}

.lumka-logo {
    font-size: 21px;
    font-weight: 700;
    letter-spacing: 0.3px;
}

.lumka-user {
    font-size: 14px;
    font-weight: 500;
    opacity: 0.95;
}

.lumka-sidebar {
    width: 280px;
    background: var(--lumka-sidebar-bg);
    border-right: 1px solid var(--lumka-border);
    box-shadow: 2px 0 12px rgba(15, 23, 42, 0.04);
}

.lumka-content {
    min-height: calc(100vh - 60px);
    padding: 28px;
    background: #f8fafc;
    color: var(--lumka-text);
}