body {
    margin: 0;
    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
}

#app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.desktop-nav {
    display: flex;
    justify-content: space-between;
    padding: 10px 16px;
    background: #f5f5f5;
    border-bottom: 1px solid #ddd;
}

.left-buttons,
.right-buttons {
    display: flex;
    gap: 8px;
}

.nav-btn {
    border: none;
    background: #e0e0e0;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
}

.nav-btn.active {
    background: #1976d2;
    color: white;
}

#content-area {
    flex: 1;
    padding: 16px;
    padding-bottom: 60px; /* space for mobile nav */
}

/* Mobile bottom nav */
.mobile-nav {
    display: none;
}

/* Avatar styles */
.avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
}

.avatar-initials {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #1976d2;
    color: white;
    font-size: 14px;
}

/* Mobile layout */
@media (max-width: 768px) {
    .desktop-nav {
        display: none;
    }

    .mobile-nav {
        display: flex;
        justify-content: space-around;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: #f5f5f5;
        border-top: 1px solid #ddd;
        padding: 8px 0;
        z-index: 100;
    }

    #content-area {
        padding-bottom: 70px;
    }
}